Syukri Arief

• PhD
• Material Chemistry Laboratory at Andalas University

The Moringa plant, a tropical species, exhibits prolific growth and is abundantly present in Indonesia and other tropical regions worldwide. An extended lifespan, continuous flowering, and a high tolerance for elevated temperatures characterize it. Utilizing its components, including leaves, bark, seeds, and roots, this multifaceted plant is renown...

The CO2 mineralization pathway is considered a promising option for carbon capture usage and storage because the captured CO2 can be permanently stored, and secondly industrial waste (i.e., petrochemical refinery, lime, and cement kiln dust) can be recycled into value-added carbonate materials by controlling the crystal polymorphs and properties of...

Cellulose is a natural biopolymer extensively utilized in biomedical applications. This study aims to develop a novel cellulose nanofiber (CNF) from areca nut shell, reinforced with cerium oxide nanoparticles (CeO2NPs). XRD analysis confirms successful synthesis of crystalline CNF and CeO2NPs with the cubic structure, strengthened by Le-Bail refine...

Chronic Suppurative Media Otitis is caused by pathogenic bacteria, which, if the growth is not controlled, will cause meningitis and can lead to death. Virgin Coconut Oil is an oil made through the traditional fermentation process of coconut milk and can inhibit the growth of pathogenic bacteria that cause Chronic Suppurative Media Otitis. So far,...

The isolation of cellulose nanofibers from areca nut shell has been successfully carried out using a simple alkaline treatment, acid hydrolysis, and followed by a morphological modification using low‐energy sonication method. The alkaline treatment consists of dewaxing and bleaching process to remove lignin, while acid hydrolysis process was carrie...

Recently, dielectric capacitors have attracted immense interest as energy storage materials. In this work, we prepare the dielectric material CaTiO3 by the molten-salt method, utilizing Pensi shell waste as a natural calcium source, aligning with principles of green chemistry. Pensi shell contains 53.1 % calcium oxide, as revealed by TGA analysis,...

Zirconium oxide nanoparticles (ZrO2 NPs) were synthesized with an effective capping agent using aqueous extract of Chlorentus erectus at the optimized conditions. The aqueous leaf extract contained phytochemical compounds that could regulate the size and shape of the nanoparticles. The average size of C. erectus-ZrO2 NPs crystallite was 10.42 nm, w...

Kaolinite is a type of clay mineral that has the potential to be used as a heterogeneous catalyst in transesterification reactions. However, natural clay still contains a mixture of minerals that occur together. Therefore, as an effort to search for cheaper catalysts to reduce the price of biodiesel production, this study carried out the separation...

The current research involved the synthesis of hydroxyapatite powders using Faunus ater shell (FaS), which is a snail found in brackish water, as a source of calcium. Hydroxyapatite (HAp) is produced through the hydrothermal synthesis of FaS, employing calcination temperatures at 900 °C (HAp900) and 1000 °C (HAp1000). The samples underwent analysis...

ZnO thin films were prepared by sol‐gel spin coating on a glass substrate via green synthesis using Uncaria gambir leaf extract. The deposited films were characterized for structural, morphological, and optical properties at various annealing temperatures (400, 500, and 600 °C). The ZnO film without annealing shows an amorphous structure, and after...

Precipitated calcium carbonate (CaCO3) has advantages such as small white and fine particle size, high homogeneity, and uniformity of particle shape so it is a product that is much sought after by various types of industry. PCC synthesis must be accompanied by the use of an efficient type of reactor for the reaction. PCC can be synthesized via a ca...

Kualitas Precipitated Calcium Carbonate yang dapat digunakan di industri kertas dan cat harus bebas dari klorin, karena dapat menyebabkan korosi pada peralatan. Hasil penelitian skala pilot plant kapasitas 2 kg/jam, produk PCC masih mengandung klorin (0,73 s/d 2,02 %), sedangkan standar industri <0,001%. Penelitian ini bertujuan untuk menghilangkan...

Palm oil polyol-based foams have inflexible and brittle properties. Palm oil polyols have a lower molecular weight. Polyols with a high molecular weight and a primary OH group, such as polyethylene glycol (PEG)-400, can provide the flexible properties of polyurethane foam. This study aimed to examine the optimum concentration of PEG-400, which can...

Alveolar bone resorption is a post-extraction complication wherein there is a reduction in the dimensions and quality of the alveolar bone. This study aimed to examine the effects of implantation of a combination of nanocrystalline hydroxyapatite (nHA) and injectable platelet-rich fibrin (IPRF) on the expression of tartrate-resistant acid phosphata...

The study of silver nanoparticles (AgNPs) fabrication has gained great interest especially for pharmaceutical applications due to its excellent antibacterial properties. AgNps are well known for their inhibitory and bactericidal effects both on positive and negative gram bacteria. However, the utilisation of some chemical reducing agents in the syn...

Hydroxyapatite (Ca10(PO4)6(OH)2, HAp) is a calcium phosphate-based biomaterial that is widely used in bone implants due to its similarity in composition with the constituent elements of bone. However, HAp still has poor mechanical properties, so research was carried out to improve the mechanical properties such as reduced brittleness, less fracture...

We synthesized the novel double-layer Aurivillius phase Pb1-2xBi1.5+2xNd0.5Nb2-xMnxO9 using the fluxes-salt approach and systematically studied its crystal structure, morphology, dielectric, ferroelectric, magnetic and optical properties. The single-phase samples for x = 0, 0.1, and 0.3 were analyzed using an X-ray diffraction analyzer (XRD). The r...

A Fe3O4@ZnO/C nanocomposite with a core-shell structure was synthesized using the co-precipitation method. To prevent the aggregation of the Fe3O4 magnetic particles, polyethylene glycol (PEG) was added. The X-ray diffractometer (XRD) results confirmed the formation of Fe3O4 and ZnO phases, with Fe3O4 having a cubic crystal system and ZnO having a...

p>Nanopartikel perak menampilkan sifat fisik dan biologis yang unik yang telah menarik minat penelitian karena aplikasi yang menjanjikan. Pada penelitian ini, proses fabrikasi nanopartikel perak(AgNPs) dilakukan dengan metode green sintesis menggunakan tanaman mangrove dengan pelarut air. Ekstrak buah mangrove Rhizophora stylosa (RS) pertama kali d...

The synthesis of precipitated calcium carbonate (PCC) using plant extracts as additives has been developed to modify the morphology, particle size, chemical purity, and stability of PCC to be used for a variety of potential applications. In this study, aloe vera (Aloe barbadensis Miller) was used as an additive for the synthesis of PCC. The synthes...

This research synthesized a [email protected]–C nanocomposite with a core-shell structure using the coprecipitation method. XRD diffractograms indicate the formation of Fe3O4 and ZnO phases, where Fe3O4 has a cubic crystal system while ZnO has a hexagonal crystal system. The presence of carbon (graphite and carbon quantum dots) in [email protected]...

In this paper, we report that the compatibility of polymer blends between linear low-density polyethylene (LLDPE) and cyclic natural rubber (CNR) can be increased by the addition of oleic acid-grafted linear low-density polyethylene. The research aims to investigate the effect of LLDPE-g-OA compatibilizer in LLDPE/CNR blends on improving the mechan...

The purpose of this study was to improve the mechanical and physical properties, degradation performance, and water absorption of a thermoplastic mixture of sago starch with the addition of Linear Low-Density Polyethylene (LLDPE). The method used is the grafting method where polyethylene is grafted onto Maleic Anhydride (LLDPE-g-MA). In this resear...

Synthesis and characterization of structure magnetic properties of Fe3O4@ZnO- C nanocomposite have been done through the precipitation method. This study aimed to discover the effect of concentrations/thickness of carbon layer on crystal structure and magnetic properties of Fe3O4@ZnO-C nanocomposites. Fe3O4 and Fe3O4@ZnO were the samples used in th...

p class="AbstractText">Fe₃O₄@PEG:ZnO nanocomposites were synthesized by the coprecipitation method with various of the samples were Fe₃O₄, Fe₃O₄@ZnO (1:1), Fe₃O₄@PEG: ZnO (1:2), and Fe₃O₄@ PEG: ZnO (1:3). The samples were synthesized with v...

This study reports the application of FeCuNi nano-alloy doped TiO2 synthesized via the sol-gel method as an antibacterial with a sterilization rate greater than 95% under ultra-violet (UV) irradiation. The performance was characterized using X-ray diffraction (XRD), thermal analysis (TG-DTA), scanning electron microscope (SEM-EDX), and transmission...

This study reports that oleic acid monomer and benzoyl peroxide initiator have affected the thermal properties and morphological of linear low-density polyethylene (LLDPE) grafted with oleic acid (OA) in a solvent system. This study aimed to determine the effect of increasing the OA monomer and benzoyl peroxide (BPO) initiator concentration on the...

Cerium oxide montmorillonite (CeO2NPs-Mt) nanocomposite has been successfully synthesized using montmorillonite (Mt) as support, Moringa oleifera as a chelating agent, and chitosan as a cross-linking agent with the green hydrothermal method. The molar composition of cerium (Ce) as a precursor and montmorillonite (Mt) as support was varied to 1: 0.5...

Flexible polyurethane foams can be synthesized using polyols having a hydroxyl value of less than 100 mg KOH/g. The value of the hydroxyl value is affected by the temperature and time of the oxirane rings opening reaction. The purpose of this study was to examine the combination of temperature and time of the best oxirane rings opening reaction to...

Aurivillius phase Bi2LaNb1.5Mn0.5O9, derived from ferroelectric PbBi2Nb2O9 by simultaneous substitution of the A-site and B-site cations, was synthesized using a molten-salt method. Here, we discuss the structure–property relationships in detail. X-ray and neutron diffraction show that Bi2LaNb1.5Mn0.5O9 adopts an A21am orthorhombic crystal structur...

Background: Most natural plants used in the synthesis of silver nanoparticles are limited to marine plants. To carry out applications, colloidal silver nanoparticles (AgNps) should have appropriate properties such as homogeneous shapes, small and narrow particle size distribution, and long time stability. This study aims to determine the effects of...

This study reports that Precipitated Calcium Carbonate (PCC) nanoparticles from limestone can be modified with oleic acid (OA), which was applied to LLDPE/CNR blends in the presence of the LLDPE-g-OA coupling agent. This study investigates PCC characteristics from limestone that has been modified with OA and its implications of increasing impact st...

The photocatalytic activity of zinc oxide (ZnO) can be enhanced by co-doping it with titanium oxide (TiO2) through a sol–gel process. The ZnO-TiO2 composite is used to make modified self-cleaning textile fibers for methyl orange (MO) degradation. Therefore, this study aims to form the morphology of ZnO-TiO2 nanorods with optical properties, crystal...

The addition of LLDPE-g-MA into the compound of sago starch/LLDPE was studied to improve its mechanical, morphology, degradation performance, and water absorption properties. Thermoplastic Sago Starch was composed of a mixture of sago starch and glycerol. LLDPE-g-MA was prepared in varied concentrations based on the weight of TPSS (0, 6, 8, 10, and...

In this study, the graft copolymerization of oleic acid (OA) onto linear low-density polyethylene (LLDPE) was successfully prepared by free radical reaction using benzoyl peroxide (BPO) initiator in the molten state. The study aims to determine the influence of OA monomer and BPO initiator on the grafting degree (GD) percentage of LLDPE-g-OA and it...

This study optimized the Precipitated Calcium Carbonate (PCC) and lithopone mixture (50:50) as substitution pigments of titanium dioxide (TiO2) in matt-type water-based paint. Matt-type water-based paint has been made in two steps; (1) mill base paste preparation and (2) water-based paint production (layout process). Pigment characterization showed...

This study investigates the improvement of the mechanical, thermal, and morphological properties of linear low-density polyethylene (LLDPE)/cyclic natural rubber (CNR) after the addition of organo-precipitated calcium carbonate (O-PCC). The impact on the properties of the LLDPE/CNR/LLDPE-g-OA/O-PCC composites was investigated by a series of empiric...

This study aims to improve the mechanical and physical properties of the thermoplastic sago starch blends with the addition of polypropylene (PP). PP concentrations were given starting from 10, 15, 20, 25, and 30 percent (%), with the addition of a PP-g-MA compatibilizer as a coupling agent. From the mechanical properties, it is known that the tens...

Nanoparticles of cerium oxide have been synthesized by green precipitation method by the presence of Moringa oleifera leaf extract with a short reaction time of 5 h. Base on XRD analysis confirmed structure crystal of cerium oxide the formation was a cubic. CeO2NPs were discovered to have a spherical shape and an average size of 17 nm, as shown in...

Background: Most natural plants used in the synthesis of silver nanoparticles are limited to marine plants. To carry out applications, colloidal silver nanoparticles (AgNps) should have appropriate properties such as homogeneous shapes, small and narrow particle size distribution, and long time stability. This study aims to determine the effects of...

Sam­ples of PbBi2Nb2O9, PbBi1.5La0.5Nb2O9, and PbBi1.5Nd0.5Nb2O9 have been pre­pared by the molten salt method. The struc­ture, mor­phol­ogy, and elec­tri­cal prop­er­ties were in­ves­ti­gated. All sam­ples are sin­gle-phase and crys­tal­lize in an or­thorhom­bic struc­ture with A21am sym­me­try. Neu­tron dif­frac­tion data in­di­cate that the Ln3+...

Hydroxyapatite Ca10 (PO4) 6 (OH) 2 is a calcium compound whose chemical composition is similar to human bone minerals. In this study, hydroxyapatite was formed into a composite material by adding borosilicate (borax and silica). For the formation of this composite material, the Hydroxyapatite borosilicate composition has been adjusted, namely: 90:1...

In this study, the four-layer Aurivillius phases, Pb1-xBi3.5+xNd0.5Ti4-xMnxO15 (x = 0, 0.1, 0.3, and 0.5), were prepared by the molten salt method, in order to investigate the effects on crystal structure, morphology, dielectric and magnetic properties of varying x composition. XRD patterns revealed that of the all samples were single-phase product...

This study uses broiler chicken eggshells to enhance catalytic activity of clay obtained from Pasaman Barat (West Sumatra, Indonesia) in lab-scale biodiesel production. The eggshell is a source of calcium oxide (CaO) which operates as a catalyst when mixed with the clay (Ca-Clay). Two other catalysts were also prepared as comparisons by 1) heating...

In this study, a facile and green synthesis approach of Zn2SnO4 was conducted by using Impatiens balsamina L. aqueous leaf extract through the hydrothermal method. The results show that Zn2SnO4 was successfully produced with a specific characteristic which is strongly influenced by the presence of extract. Furthermore, X-ray diffraction (XRD) patte...

This study reports the successful synthesis of high purity Zn2SnO4 with octahedral microstructures through a green approach using Garcinia mangostana fruit peel extract. X-ray diffraction (XRD) patterns confirmed an enhanced crystallinity of the resulting sample. Meanwhile, morphology observation ascribed the formation of octahedral Zn2SnO4 by the...

The double-layer Aurivillius phase Pb0.4Bi2.1La0.5Nb1.7Mn0.3O9 was synthesized by a molten salt method using a K2SO4/Na2SO4 flux. The effect on the crystal structure, morphology, dielectric and magnetic properties of varying the molar ratio of the oxide precursors to salt flux was investigated. Single-phase products with an orthorhombic structure w...

Plant mediated biosynthesis of nanoparticles is going important due to simple processes and non-toxic materials utilization. Rhizophora stylosa (RS) mangrove leaf extract was successfully used as a bioreductor in the production of AgNPs by varying the concentration of silver nitrate and the amount of extract. Leaf extract is made by dissolving 10 g...

The four-layer Aurivillius CaBi4Ti4O15 with introducing of La3+ on the A-site and Mn3+ on the B-site with the formula Ca1-xBi3+xLaTi4-xMnxO15 (x = 0, 0.2, 0.4, 0.6, 0.8, and 1) were synthesized by molten salt method using the mixture of sulfate salts K2SO4/Na2SO4 as the flux. XRD data confirmed the formation of single-phase Aurivillius with A21am o...

Batu kapur merupakan bahan tambang yang ketersediaannya sangat melimpah di Indonesia terutama daerah Sumatera Barat. Batu kapur disintesis untuk pembuatan filler Precipitate Calcium Carbonat. Hasil penelitian yang telah dilakukan terhadap filler Precipitate Calcium Carbonat dari batu kapur berdasarkan hasil analisis X-RD, FTIR dan SEM-EDX, dapat di...

Nanocomposite ZnO/ZnFe2O4 photocatalysts with different proportions of ZnFe2O4 were synthesized in organic-free media using metal nitric as precursors. The ZnO phase with hexagonal wurtzite structure and low crystallinity of ZnFe2O4 was confirmed using XRD (X-Ray diffraction). Different morphologies of the nanocomposites were obtained ranging from...

The surface of ultrahydrophobic glass has been successfully prepared using the combination of TiO2 and stearic acid. TiO2 was used to increase the surface roughness, while stearing acid was a surface modifier. The peroxo sol-gel method has been used to synthesize TiO2 precursors on the glass layer followed by modification of stearic acid. The maxim...

In this work, ZnO thin film is fabricated by a green chemical approach using Uncaria gambir leaf extract on a glass substrate. The hexagonal wurtzite structure of ZnO does not change with the use of extracts. While ZnO fabricated without extract does not show preferred orientation, the ZnO prepared with extract shows c-axis orientation. The crystal...

A single-phase sample of the Aurivillius compound Pb0.4Bi2.1La0.5Nb1.7Mn0.3O9 was prepared by a molten salt method using K2SO4/Na2SO4 as the flux. The crystal structure, morphology, ferroelectric and magnetic properties were investigated. Neutron powder diffraction data confirmed a non-centrosymmetric orthorhombic crystal structure with space group...

Synthesis of four-layer Aurivillius CaBi3LaTi4O15 has been successfully carried out by hydrothermal technique using NaOH 4 M as mineralizer. The reaction was carried out at 220 °C for 72 h. Crystal structure, morphology, and dielectric properties were analyzed in this study. X-ray diffraction confirmed that the single-phase product was successfully...

Complete plasticization of starch granules plays an important role in maximizing the properties of a starch film. Ultrasonication treatment is one way to achieve this by breaking up insoluble starch grains. This study reports on the effects of ultrasonication on the characterization of bengkoang (Pachyrhizus erosus) starch films. Starch gel was son...

The manganese spinel ferrite (MnFe2O4) particles were successfully synthesized via a hydrothermal route in green betel leaf (Piper betle Linn) extract media. Morphology, structure, and characteristics of the samples were analyzed by Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), X-Ray Diffraction (XRD), Fourier-Transfor...

A facile strategy was developed to fabricate transparent ultrahydrophobic glass. First, TiO2 films were deposited uniformly on untreated glass substrate after heating aqueous peroxotitanate thin films at 120 °C for 1 h followed by octadecyltrichlorosilane (ODTS) modification. The as‐fabricated surfaces were then possessed ultrahydrophobic propertie...

The aim of this work is to investigate the capabilities of Uncaria gambir leaf extract (UGLE) in the synthesis of ZnO nanoparticles (NPs) via a green approach. We made two types of nanoparticles. The first nanoparticles were prepared by dissolving Zn(Ac)2.2H2O in UGLE and the second nanoparticles were prepared by dissolving Zn(Ac)2.2H2O in isopropa...

Polymer insulators tend to fail because of the climatic and environmental conditions. The failure occurs when the surface of insulator is contaminated by sea salt or cement dust which lead to partial discharge (PD). Leakage currents will increase by PD that causes deterioration of insulation. To predict the insulation failures, an adaptive neurofuz...

Studies of green synthesis of nanoparticles mediated by plants extract is extensively explored and studied in recent time due to eco-friendliness, cost-effectiveness, and use a minimum amount of toxic chemicals in the process of inorganic material synthesis. In this study, the immobilization of silver nanoparticles on the surface of titanium dioxid...

A well-distributed nano-silver hydroxyapatite composite has been successfully prepared by a one-pot synthesis method. Hydroxyapatite was separately synthesized by a sol-gel method, then impregnated with silver nanoparticles with the mediation of Uncaria gambir Roxb. leaf extract in the presence of three kinds of alkanolamine compound; monoethanolam...

The double-layer Aurivillius phases Pb1-2xBi1.5+2xLa0.5Nb2-xMnxO9 (x=0, 0.1, 0.3, and 0.5) were synthesized by a molten salt method using a mixture of K2SO4/Na2SO4. The effect of composition on the structure, morphology and dielectric properties was investigated. X-ray diffraction showed that single-phase samples with a non-polar, orthorhombic A21a...

This paper presents the development of Rogowski coil to detect the partial discharge. Rogowski coil sensor is composed of a ferrite core with a various number of turns which is 5, 10, 20 and 30 turns with a half circle and full circle configuration. The sensors need to be tested based on the number of the turns they have in reading the partial disc...

The development of an economic and eco-friendly approach of silver nanoparticles synthesis is an important issue due to its wide application, especially in biomedical applications. In present study, an eco-friendly method and size controlling is developed to synthesize silver nanoparticles using Uncaria gambir Roxb. and monoethanolamine (MEA) as bi...

Sintesis nanopartikel perak-TCP telah dilakukan pada penelitian ini. Nanopartikel perak dibuat dengan mereduksi larutan perak nitrat dengan menggunakan ekstrak daun alpukat sebagai bioreduktor. Tricalsium Phosphate (TCP) dicelupkan kedalam nanopartikel perak membentuk komposit perak-tricalcium phosphate. Hasil analisis UV-Vis menunjukkan pembentuka...

The photocatalytic activity of cerium oxide increased after being doped with mesoporous silica. Increasing activity photocatalytic as shown from BET, TEM, and DRS UV Vis data. Results showed the surface area of Cerium oxide doped of mesoporous silica advanced from 97.44 to 736.88 m2g −1. High surface area caused increased photocatalytic activity. D...

The corrosion of steel and its alloys is an important problem in industry, especially in acidic environments. Mild steel is one of the important alloys of iron which has many industrial applications because of its excellent mechanical properties, but mild steel is susceptible to corrosion. Corrosion problems need to be a concern and must be handled...

Nanocrystalline cerium oxide is synthesized by precipitation method using a mixture of water solvent and isopropanol with a ratio of 1: 6 at room temperature has been successfully synthesized. Nanocrystalline cerium oxide was characterized by using XRD, DRS UV-Vis Analytic, SEM and TEM. XRD results showed the peak intensity of Cerium Oxide (CeO 2 )...

Silver-cerium nanoparticles had been successfully synthesized using the sol-gel method by silver nitrate as a source of silver and cerium nitrate hexahydrate as a source of cerium. The synthesized silver-cerium nanoparticles had been characterized by X-ray diffraction,transmission electron microscopy, and scanning electron microscopy-energy dispers...

Nanocrystalline cerium oxide is synthesized by precipitation method using a mixture of water solvent and isopropanol with a ratio of 1: 6 at room temperature has been successfully synthesized. Nanocrystalline cerium oxide was characterized by using X-Ray diffraction (XRD), DRS UV-Vis Analytic, scanning electron microscopy (SEM) and transmission ele...

Cellulose fiber was isolated from bengkoang (Pachyrhizus erosus) tuber peel. A suspension consisting of distilled water, starch, and glycerol was mixed with various cellulose loadings (0, 2, 6, and 10 g) then gelatinized using a hot plate with a magnetic stirrer. The biocomposite gel was sonicated using an ultrasonication probe (47.78 W/cm² for 4 m...

This research aims to investigate process and mechanism of splitting water by illumination copper oxide using indoor lights. We report here an innovative approach, in which the lights are used from low energy and rarely never using in general photovoltaic system. The illumination is monitoring with high resolution CMOS Camera, 13 MPixel of OPPO X90...