Rahadian Zainul

Rahadian Zainul
Universitas Negeri Padang | UNP · Department of Chemistry

Professor

About

168
Publications
51,611
Reads
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312
Citations
Introduction
Rahadian Zainul currently works at the Department of Chemistry, Situs Resmi Universitas Negeri Padang. Rahadian does research in Chemical Kinetics and Catalysis. Their current project is 'new biosorbent material'.
Skills and Expertise

Publications

Publications (168)
Article
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The global pandemic of COVID-19 has caused disastrous consequences for both humans and theeconomy. The purpose of this study was to determine the potential of juwet (Syzygium cumini L.) andmoringa (Moringa oleifera L.) as inhibitors of RBD spike, helicase, Mpro, and RdRp activity of SARS-CoV-2with an in-silico approach. Samples were obtained from P...
Article
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Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes the COVID-19 pandemic that infects humans and attacks the body's immune system. The purpose of the study was to identify the potential of bioactive compounds in purslane (Portulaca oleracea L.) and star anise (Illicium verum Hook) via a dual inhibitor mechanism against SARS-CoV-2 p...
Article
Human papillomavirus (HPV) is a small and non-enveloped deoxyribonucleic acid (DNA) virus that infected mucosal cells. This viral genome is composed of early and late genes. Late (L) encodes the L1 and L2 proteins. The structural protein L1 is located outside the virion. It contributes to the viral attachment mechanism; hence it becomes the target...
Article
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In this study, bentonite modified by zirconium nitride (ZrN) and zirconium phosphide (ZrP) catalysts was studied in the hydrocracking of crude palm oil to biofuels. The study demonstrated that bentonite was propitiously modified by ZrN and ZrP, as assessed by XRD, FTIR spectroscopy, and SEM-EDX analysis. The acidity of the bentonite catalyst was re...
Article
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Breast cancer is one of the worst diseases that affect female people. Long-term treatment with therapy or surgery has a detrimental impact on the patient. The algae Kappaphycus alvarezii has gotten a lot of interest as a breast cancer medication because it contains chemicals that are expected to be anti-cancer. The objectives of this paper were to...
Article
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The number of cases of obesity and type 2 diabetes mellitus (T2DM) is part of the metabolic syndrome case. Purslane (Portulaca oleracea L.) is a plant that has been clinically tested and has the potential to prevent and treat metabolic syndrome as well as pathogenic and pathophysiological activities that cause disease. The aim of this study is t...
Article
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Coronavirus disease, which was due to novel coronavirus was detected in December 2019 in Wuhan, China for the first time and spread rapidly became a global pandemic. This study aimed to predict the potential of macroalgae compounds as SARS-CoV-2 antiviral by inhibiting of ACE2 receptor through in silico approach. Twenty-seven macroalgae compounds w...
Article
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In this work, a novel electrochemical sensor was developed by electron-withdrawing substituent modification of 1-phenyl-3-methyl-4-(4-fluorobenzoyl)-5-pyrazolone on a graphene-modified glassy carbon electrode (HPMpFP-graphene/GCE) for glucose detection. The results of characterizations using a scanning electron microscope, Fourier transform infrare...
Article
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COVID-19 is a syndrome affecting pulmonary function but rather in serious conditions leads to death. Kencur (Kaempferia galanga L.) is a type of rhizome plant in Indonesia that is used as an herbal medicine called Jamu because it is believed to be able to cure various types of diseases. One of which is for anti-virus. The goal of this study was to...
Article
An electrochemical chemical sensor for determination of uric acid (UA) with highly sensitive and widely working range was fabricated using zinc layered hydroxide-sodium dodecyl sulphate-propoxur (ZLH-SDS-PRO) nanocomposites modified with multiwall carbon nanotubes (MWCNT). Introduction of the ZLH-SDS-PRO as a conducting matrix has enhanced the cond...
Article
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Severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2) is the virus that causes COVID-19 which is responsible for respiratory illness infection in humans. The virus was first identified in China in 2019 and later spread to other countries worldwide. This study aims to identify the bioactive compounds from mangosteen (Garcinia mangostana L.) a...
Article
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Context: The COVID-19 outbreak is caused by the transmission and infection of SARS-CoV-2 at the end of 2019. It has led many countries to implement lockdown policies to prevent the viral spreading. Problems arise in a COVID-19 patient because of viral infection that leads to a systemic response in the immune system, specifically due to cytokine sto...
Research
Full-text available
Context: The COVID-19 outbreak is caused by the transmission and infection of SARS-CoV-2 at the end of 2019. It has led many countries to implement lockdown policies to prevent the viral spreading. Problems arise in a COVID-19 patient because of viral infection that leads to a systemic response in the immune system, specifically due to cytokine sto...
Article
Full-text available
Severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2) is the virus that causes COVID-19 which is responsible for respiratory illness infection in humans. The virus was first identified in China in 2019 and later spread to other countries worldwide. This study aims to identify the bioactive compounds from mangosteen (Garcinia mangostana L.) a...
Article
This study aims to determine the maximum concentration of hydrogen gas produced through the electrolysis process of dry cell generators. This research using experimental generator apparatus with Sensor-MQ-8 Arduino and optimizing using Response Surface Method with Design Expert 6. To produce hydrogen gas is done through the method of water electrol...
Article
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Rendang is a kind of food that has become one of cultural heritages of Minangkabau tribe. It is not only a local food that has been crowned the best food in the world by CNN, but it also serves as the cultural identity. Most of people think that rendang is only made from beef of buffalo meat. In fact, rendang has many varieties that relate to the t...
Article
The usefulness of carboxymethyl cellulose (CMC) as a matrix material in enhancing the controlled release formulations of bispyribac (BP) herbicide from the interlayer gallery of zinc hydroxide nitratesodium dodecylsulphate–bispyribac (ZHN–SDS–BP) nanocomposite was investigated. The CMC coated nanocomposite, ZHN–SDS–BP–CMC was characterised using se...
Article
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A massive transmission of SARS-CoV-2, which happens particularly in developing countries has continuously triggered a COVID-19 tsunami and may genuinely increase the mortality number. The significant mortality rate caused by the SARS-CoV-2 pandemic has made it a major world problem. Viral infectivity could arise from the lack of information on the...
Article
Full-text available
Context: The COVID-19 outbreak is caused by the transmission and infection of SARS-CoV-2 at the end of 2019. It has led many countries to implement lockdown policies to prevent the viral spreading. Problems arise in a COVID-19 patient because of viral infection that leads to a systemic response in the immune system, specifically due to cytokine sto...
Article
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This research was conducted to develop an e-learning platform using Moodle Application ofacid based topic. This is research and Development (RD). The Development model used is a 4-D which consist of stage define, design, develop, and disseminate. This research is limited to the stage of development, namely the validity. The E-learning was Validated...
Article
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In this work, the use of carboxymethyl cellulose (CMC) is highlighted in enhancing the controlled release behaviour of zinc/aluminium layered double hydroxide-quinclorac (Zn/Al-LDH-QC). The Zn/Al-LDH-QC-CMC nanocomposite were characterised using powder x-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric and derivative ther...
Article
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Currently the 2013 curriculum applies scientific approach in learning activities to develop self-potential by sharpening the mindset of students to be more active and creative. To realize these goals, learning methods and media must be carefully selected. This research will produce an e-module based on a scientific approach with probing and prompti...
Article
The environmental pollution that results from the excessive usage of pesticides has been threatening the communities for decades. In this study, carboxymethyl cellulose (CMC) is proposed as a coating agent to encapsulate zinc hydroxide nitrate–sodium dodecylsulphate–imidacloprid (ZHN-SDS-IC) for the implementation of controlled release formulation...
Article
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This research aims to develop e-learning for learning Chemistry, Law of Basic Chemistry, for Senior High Schools (SMA/MA). The method used is Borg and Gail. E-learning product development using the Moodle 3.75 application. The stage in the development of this research is the content and construct validity of the product being developed. The result...
Article
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Silica is a mineral that is abundant in the earth’s surface. Silica has also been used in human civilization, such as making glass, electronic devices, adsorbents, fertilizers and others. Utilization of natural silica requires technology that is reliable enough so that impurities in the natural silica do not interfere with its use. In this study, t...
Article
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Penelitian ini dilakukan untuk mengembangkan konten pembelajaran e-learing menggunakan aplikasi moodle mata pelajaran kimia materi larutan elektrolit dan non elektrolit. Jenis penelitian ini adalah Research and Development (RD). Model penelitian yang digunakan adalah model 4-D dengan tahap define, design,develop dan disseminate. Tahap penelitian in...
Article
The Muslim fishing community in Paloh Village, Paciran District, Lamongan Regency chooses and makes the sea a halal livelihood besides trading, because they liveon the coast of the Java sea. Almost all the men in the village work as crew members of fishing boats. For those who have capital, all the facilities and infrastructure at sea have been ful...
Article
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A new nano host-fungicide, namely zinc hydroxide nitrate–sodium dodecyl sulphate–fluazinam (ZHN–SDS–FZ) was successfully synthesised using an ion exchange method. The intercalation of fluazinam (FZ) in the interlayer gallery of ZHN–SDS was confirmed by PXRD pattern with the basal spacing of 32.7 Å. The FTIR confirmed that FZ exist in the interlayer...
Article
The aim of this study is to modulate the controlled release properties of zinc hydroxide nitrate–sodium dodecylsulphate–bispyribac (ZHN–SDS–BP) nanocomposite, by coating the nanocomposite using chitosan. This study was conducted as part of an effort to reduce the environmental problems caused by the over-use of pesticides. The characterisation stud...
Article
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Learning in the Industrial Revolution Era 4.0 has shifted the role of learning teachers to confirm teachers. This research aims to analyze the acceptability of e-learning products in Educational Basic Courses (MKDK) of Education Professions for students at the Educational Institution (LPTK) in Indonesia. In this study conducted by the Borg and Gall...
Article
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Learning in the industrial revolution era 4.0 and the Covid 19 pandemic period shifted towards digital and online learning. This research aims to analyze the Basic Educational Course (MKDK) elearning product for Student Development that was developed. The method used is mixed method research, qualitative and quantitative mixture. The development of...
Article
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Online learning is the key to the implementation of learning in the Covid 19 pandemic and the New Normal era. The purpose of this study was to determine the effectiveness of the e-learning course on subjects 'Learn and Learning' with Moodle-based for prospective teachers in Indonesia. This research was conducted using the Berg and Gail development...
Article
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This research aims to develop teaching materials in the form of e-modules that are valid and practical. The type of research used is research and development (RD). The development model used is the 4-D model which includes 4 stages, namely the define, design, develop and disseminate. Research carried out until the development stage, namely the vali...
Article
Imidacloprid (IC) is a neutral charge insecticide that is commonly used in paddy cultivation areas to kill invasive insects. However, the uncontrollable usage of IC may cause serious problems toward the non–target organisms and environment. This work focussed on the potential of using chitosan to develop an efficient insecticide that could minimise...
Article
A novel electrochemical sensor for sensitive and selective detection of hydroquinone (HQ) was developed using graphene/iridium(III) dimer complex composite modified glassy carbon electrode (graphene/Ir(III) complex/GCE). The composite was characterised by field emission scanning electron microscopy, energy dispersive X-ray microanalysis, Fourier tr...
Article
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This research was conducted using a phototransformator reactor which was used to degrade humic acid with photocatalysts of calcined CuO plates for 1 hour at 4000C. This reactor is designed in hexagonal shape made of glass with a thickness of 3 mm which has a rotation with speeds of 1000, 1500 and 2000 rpm, in this reactor filled with 200 mL of humi...
Article
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One of the photocatalysts that is being developed for the degradation of humic acid is ZnO, because it is cheap, easy to obtain and the synthesis process is easy, large size ZnO has several disadvantages such as small surface area and energy band gap which are not suitable when applied to visible light. The research developed a method of making zno...
Article
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Doping agents that can increase the activity of TiO2 photocatalys, namely copper (II) or Cu2+ ions because copper is one of the abundant transition metal elements on earth and has Cu2+ (0,68 Å) ion radius which is close to the radius Ti4+ that is (0,74 Å) so that it can be incorporated in TiO2 crystals. Coping is done using the sol-gel method. The...
Article
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TiO 2 thin layer on ceramic with dip coating method and photocatalyst activity test in humic acid. One of the photocatalysts used for the degradation of humic acid is TiO 2 because TiO 2 has several advantages, including non-toxic, stable, high activity, relatively inexpensive and environmentally friendly. This study was performed using TTIP as a p...
Article
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The purpose of this study is to produce a discovery learning based e-module on buffer solution topic for Class XI Senior High School (SMA/MA). The type of research used is Research and Development using 4-D models with 4 stages, namely: (1) define, (2) design, (3) develop and (4) disseminate. This e-module was validated by 2 Chemistry lecturer from...
Article
Full-text available
Learning in the industrial revolution era 4.0 and the Covid 19 pandemic period shifted towards digital and online learning. This research aims to analyze the Basic Educational Course (MKDK) elearning product for Student Development that was developed. The method used is mixed method research, qualitative and quantitative mixture. The development of...
Preprint
This Electrochemical Sensor: Principles and Applications book can be used by students and researchers interested in developing materials and catalysts. In this book there is a basis for making electrochemical sensors and materials integrally examined based on their respective parts and techniques.
Article
In writing scientific work, a work system is needed online (online) so that the search process is fast and accurate. The online data-based writing model with endnote application is an alternative model of scientific writing that can be applied to school teacher teachers and lecturers. The purpose of this study was to develop a model of scientific w...
Article
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This research aims to synthesize ZnO-CuO composites to be applied as a catalyst material that acts on visible light. The preparation process of ZnO-CuO composite using sonochemistry method. Percusor used in this research is Zn (CH 3 COO) 2 .2H 2 O and CuSO 4 .5H 2 O with a ratio of 1: 1, 2: 1, 3: 1, 4: 1, 5: 1 and variations in the exposure time us...
Article
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A study has been conducted on the use of anthocyanin extract from fruits (Melastomamalabthricum L), which was incubated by the addition of salicylic acid as photosensitizer in DSSC solar cells. The objective of this study was to determine the optimum condition of the extracts of copigmenation which resulted in the optimum efficiency of DSSC solar c...
Article
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Silver nanoparticles have been successfully synthesized using a chemical reduction method at room temperature using glucose as a reducing agent, silver nitrate as a source of nitrate, polyvinyl alcohol (PVA) as a stabilizing agent. The purpose of this research was to determine the effect of the mole ratio of reducing agent Glu / Ag and percentage (...
Article
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Heavy metals are metals that have a mass of more than 5 g / cm3 in the lower right corner of the periodic system. Heavy metals rarely form atoms themselves in water, but are usually bound by other compounds to form molecules. Heavy metal is a chemical compound that has the potential to cause environmental pollution problems. Methods of heavy metal...
Article
Coating techniques are important parts in the development of nano material technology. In this paper, the development of coating technology based on microcontroller using dip coating is presented. Arduino microcontroller is implemented to control the immersion time and the speed of withdrawal of material out of the coating fluid through a stepper m...
Article
This research aims to make a 4/4 plate Al-Cu plate-based hydrogen generator. The method used is design and engineering as well as testing the performance of the gas produced during the electrolysis process of water. The results obtained are hydrogen reactors that are capable of producing 7.5 mL of gas from water with a supporting voltage of 2 V and...
Preprint
This research is aimed to develop the e-modul of acid base based of discovery learning.. The type of research used is research and development or Research and Development (R&D). The development model used is a 4-D model (four-D models) which consists of 4 stages, namely: define, design, develop and disseminate. This research is limited to the stage...
Article
Full-text available
One of the electron suppliers in a indoor lights photovoltaic system is the Na2SO4 electrolyte system. The aim of this research is to know the effect of sodium sulfate concentration on photovoltaic performance of indoor lights photovoltaic. The method used is liquid electrolyte system and gel electrolyte system made with various concentration on pl...
Article
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Photoreactors are systems that convert light into an energy source. This research aims to design and build a visible light hexagonal photoreactor to generate electrical energy. The method used is geometry design and photoreactor prototype making. The tested photoreactors were tested using the integrated android F1-S (Appertude 2.0 Camera) light det...
Article
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One of the reported doping agent to increase TiO2 activity is Cu. In this research, TiO2 was prepared by So-Gel method. Preparation was performed by calcinaton at the temperature range of 400, 500, 600°C for 2 hours with a corresponding dopan concentration of 0%, 1%, 3%, 5% mol of TiO2. The nanoparticle materials was characterized using XRD. It is...
Article
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Research on the preparation of DSSC has been completed by using an anthocyanin dye from jengkol shell that copigmentation with gallate acid. The aim of this research is to know the variation of the duration of TiO2 immersion with the dyes, Effect of TiO2 coating on glass ITO, Effect of coating method of TiO2 paste with dye to DSSC efficiency. Varia...
Article
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This paper presents the application of zinc/aluminium-layered double hydroxide-quinclorac (Zn/Al-LDH-QC) as a modifier of multiwalled carbon nanotubes (MWCNT) paste electrode for the determination of bisphenol A (BPA). The Zn/Al-LDH-QC/MWCNT morphology was examined by a transmission electron microscope and a scanning electron microscope. Electroche...
Preprint
Asam fosfat merupakan merupakan asam mineral anorganik yang memiliki rumus kimia H3PO4. Asam fosfat juga dikenal pula sebagai asam ortofosfat atau asam fosfat(V). Asam fosfat berwujud zat padat dengan T.D =280°C dan T.L = 44,1°C dan pada temperatur tinggi (t =1040 °C), mengalami disosiasi. Sumber yang pada umumnya dari asam fosfat adalah larutan ai...
Preprint
Hidrogen sianida dalam air membentuk asam lemah bersifat toksik. Tujuan review ini untuk menganalisis molekular dan transpor elektron hidrogen sianida. Metode yang digunakan adalah penggambaran molekul dengan aplikasi Chem Office versi 15.0 , untuk mengetahui transpor ion asam sianida yaitu dengan parameter konduktivitas, viskositas, mobilitas ion,...
Preprint
Raksa (II) Nitrat merupakan suatu senyawa berupa kriVtal yang tak berwarna atau bewarna putih. Senyawa ini dapat dibuat dengan bereaksikan asam nitrat dengan logam raksa. Raksa dapat larut di?dalam air dalam bentuk senyawa raksa (II) Nitrat ini. Selain itu juga dapat larut dalam aseton, amoniak, namun tidak dapat larut dalam alkohol. Tujuan penulis...
Preprint
Magnesium klorida adalah salah satu senyawa kimia dengan rumus MgCl2 dan bentuk hidrat MgCl2.H2O. Magnesium klorida merupakan logam yang kuat, memiliki titik didih 714°C dan titik lebur 1412 °C mampu larut dalam air, serta memiliki sifat thermodinamika seperti∆Hf 298 sebesar-641,3kj/mol dan∆Gf 298 sebesar -591,8 kj/mol. Senyawa ini dapat diperoleh...
Preprint
Magnesium klorida adalah salah satu senyawa kimia dengan rumus MgCl2 dan bentuk hidrat MgCl2.H2O. Magnesium klorida merupakan logam yang kuat, memiliki titik didih 714°C dan titik lebur 1412 °C mampu larut dalam air, serta memiliki sifat thermodinamika seperti∆Hf 298 sebesar-641,3kj/mol dan∆Gf 298 sebesar -591,8 kj/mol. Senyawa ini dapat diperoleh...
Preprint
Vanadium Pentaoksida merupakan senyawa dengan rumus V2O5. Vanadium Pentaoksida bewarna kuning orange dan ketika membeku membentuk kristal seperti jarum. Vanadium pentaoksda bersifat amfoter yang dapat bereaksi dengan asam maupun basa. Vanadium pentaoksida berfungsi atau dapat digunakan sebagai bahan katalis dari suatu larutan. Kelarutan senyawa ini...
Preprint
Asam sulfat merupakan asam mineral (anorganik) yang kuat dan larut dalam air pada semua perbandingan yang ada. zat ini memiliki banyak kegunaan terutama bidang industry. Penelitian ini bertujuan untuk menganalisis interaksi molekuler dan karakterisasi dari asam sulfat. Metode yang digunakan adalah penggunaan aplikasi Chemdraw 8.0(komputasi),penulus...
Preprint
Kalium Nitrat merupakan garam anorganik dengan rumus kimia KNO3. Kalium Nitrat termasuk senyawa ionik yang disusun oleh kation K+ dan NO3- dan merupakan sumber nitrogen paling penting dialam. Kalium nitrat bersifat polar yang dapat larut di dalam air, 133 g/L (00C) dan 316 g/L (200C). Penelitian yang dilakukukan terhadap Kalium Nitrat digunakan unt...
Preprint
Natrium Karbonat merupakan salah satu garam natrium dari asam karbonat yang bersifat higroskospis. Natrium Karbonat biasanya dapat digunakan dalam pembuatan kaca. Sintesis Natrium karbonat dapat dilakukan dengan proses Leblanc dan Solvay. Tujuan dari review ini untuk mengetahui termodinamika dan transport ion pada senyawa natrium karbonat. Metode y...
Preprint
Nitrat litium merupakan senyawa ionik yang memiliki rumus senyawa LiNO3. Litium berikatan ion dengan nitrat,yaitu ikatan ion poliatomik. Litium nitrat disusun atas atom-atom logam dan non-logam, karena itu jenis ikatannya bersifat ionik. Elektron valensi dipegang oleh ion individu, sehingga mereka tidak bebas untuk menghantarkan listrik. Dalam labo...
Preprint
Natrium Silikat adalah nama umum untuk senyawa dengan rumus kimia Na2SiO3. Senyawa ini lebih dikenal dengan nama natrium metasilikat, waterglass atau gelas cair. Tujuan review ini adalah untuk mengetahui karakteristik molekul dan transpor ion Natrium Silikat. Metode yang digunakan untuk mengetahui karakteristik molekul yaitu metode pemodelan komput...
Preprint
Natrium klorida dikenal dengan garam dapur. Senyawa ini memiliki rumus NaCl dan larut dalam air. Natrium klorida merupakan senyawa yang berwujud padat bentuk kristal dan berwarna putih. Natrium klorida merupakan senyawa ionik karena adanya ikatan antara logam natrium dengan non logam klorin. Natrium klorida, didalam air dapat terion menjadi ion ion...
Preprint
Kalsium klorida merupakan senyawa anorganik dengan rumus kimia CaCl2 berupa padatan kristal yang tak berwarna pada suhu kamar dan sangat larut dalam air. Dalam analisis struktur molekul Kalsium Klorida (CaCl2), riset ini bertujuan mengetahui karakteristik molekul, struktur, sifat, permukaan, jari-jari molekul, energi stabiliti dan MM2 molekul terse...
Preprint
Asam fosfat merupakan merupakan asam mineral anorganik yang memiliki rumus kimia H3PO4. Asam fosfat juga dikenal pula sebagai asam ortofosfat atau asam fosfat(V). Asam fosfat berwujud zat padat dengan T.D =280°C dan T.L = 44,1°C dan pada temperatur tinggi (t =1040 °C), mengalami disosiasi. Sumber yang pada umumnya dari asam fosfat adalah larutan ai...