Gani Purwiandono

Islamic University of Indonesia | UII · Department of Chemistry

This study aims to determine the effects in physical chemistry class with the workshop sessions on measuring PKO viscosity by CV. Bina Agro Mandiri. The effects are evaluated through the enhancing of student's learning interest in the Physical Chemistry II class in Chemistry Program of the Islamic University of Indonesia, which presents a good aven...

Highly-effective photocatalyst of NiO/g-C3N4 with was successfully synthesized by using phyto-mediated-synthesized nickel nanoparticles. The preparation was initiated by synthesizing nickel nanoparticles by using Tinosphora cordifolia stem extract under ultrasound-assisted method followed by the dispersing onto g-C3N4 structure. The study focused o...

A facile synthesis method of gold nanoparticles (AuNPs) utilizing Lantana camara flower extract (LFE) using visible light illumination towards the bio-reduction system has been conducted. The systematic characterizations of AuNPs were employed using transmission electron microscopy, X-ray powder diffraction, scanning electron microscopy, and X-ray...

This research investigated preparation of geopolymer as adsorbent for dye-containing and peat water treatment. The green synthesis of geopolymer utilized tin mine tailings waste as source and Salacca leaves ash as activator. For the detail of study, effect of Salacca leaves ash amount to the physicochemical characteristics of the geopolymer was stu...

Preparation of green synthesized silver nanoparticle (AgNPs)-doped hydroxyapatite (Ag/HA) utilizing Curcuma longa leaf extract and land snail (Achatina fulica) shell waste was performed. Physicochemical characteristics and antibacterial activity of Ag/HA composite as a function of Ag content was studied. Instrumental analysis such as XRD, SEM-EDX,...

A flower-like hierarchical nanostructure of Sn3O4/montmorillonite is first reported in this work. The nanomaterial was prepared by a one-pot hydrothermal synthesis method using tin chloride as the precursor, and the physicochemical characteristics of the material were examined by instrumental analyses. The prepared nanostructure was evaluated as a...

Water pollution has become one of the most serious environmental issues recently, especially in relation to chemical-containing wastewater. Uncontrolled industrial waste, including large amounts of dye-containing wastewater from textile industries, needs intensive attention. In this work, the synthesis of Fe3O4@SiO2 nanocomposite biogenic silica fr...

This paper reports on the first case of the recyclable catalysts of ZnO/SiO2 prepared from salacca leaf ash as a source of silica for biodiesel production. The catalysts were prepared using a hydrothermal synthesis method, and the catalyst was utilized for biodiesel conversion from rice bran oil. Physicochemical properties of the catalysts were stu...

SnO2 nanoparticles were synthesized utilizing Tinospora cordifolia stem extract. The effects of the concentration of the extract and the utilization of ultrasound irradiation on different chemical properties, mainly surface morphology, were studied. To determine the instrumental characteristics, X-ray diffraction, Fourier-Transform-Infra Red, scann...

Magnetically-separable photocatalyst of magnetic biochar has been prepared from snake fruit peel and utilize for photooxidation of rhodamine B. The synthesis was performed by immobilizing iron oxide precursors via co-precipitation followed by carbonization under N2 gas at 400°C for h. The obtained magnetic biochar was characterized using X-ray diff...

The magnetically separable nanocomposite of γ-Fe2O3/montmorillonite (γ-Fe2O3/Mt) has been synthesized by a hydrothermal method. The as-obtained nanocomposite is composed of a single phase of γ-Fe2O3 nanoparticles homogeneously dispersed in a montmorillonite structure with high photocatalytic activity for rhodamine B photodegradation. Physicochemica...

In recent years, magnetic nanoparticles (MNPs) have demonstrated marked progress in some research fields, including these innovative composite formations with much other metal oxides, one of these is silica. This paper presents a review of magnetic silica nanocomposites (MSNCs) and the functionalized forms for environmental and medical applications...

In this work, photoactive nanocomposites of ZnO/SiO2 porous heterostructures (PCHs) were prepared from montmorillonite clay. The effects of preparation methods and Zn content on the physicochemical features and photocatalytic properties were investigated. Briefly, a comparison of the use of hydrothermal and microwave-assisted methods was done. The...

The present study reported biofabrication of flower-like SnO2 nanoparticles using Pometia pinnata leaf extract. The study focused on the physicochemical characteristics of the prepared SnO2 nanoparticles and its activity as photocatalyst and antibacterial agent. The characterization was performed by XRD, SEM, TEM, UV-DRS and XPS analyses. Photocata...

The composite of green synthesized gold nanoparticles (Au NPs)-doped hydroxyapatite (HA) has been prepared. The gold nanoparticles were produced via bioreduction of HAuCl4 with Clitoria ternatea flower extract, and utilized in the synthesis of hydroxyapatite using Ca(OH)2 and ammonium diphosphate as precursor. The aim of this research is to study t...

In this study, the green synthesis of NiO nanoparticles (NiO NPs) by using the leaf extract of Tagetes erecta L as the bio-reductor was reported. NiO NPs were synthesized by two methods, viz. microwave irradiation and the reflux method, respectively, and physicochemical properties of the as-formed NiO NPs were characterized by XRD, SEM-EDX, TEM, an...

A visible-light sensitization on porous clay heterostructure of zinc-silica modified montmorillonite (PCH-ZnSi) photocatalyst with tris(2,2′-bipyridyl) dichlororuthenium has been conducted. The preparation of PCH-ZnSi was performed by intercalation of surfactant and co-surfactant of cetyl trimethyl ammonium bromide-trimethanol amine followed by app...

Magnetic montmorillonite nanocomposites of Fe3O4/Mt were synthesized via a hydrothermal method. The syntheses were conducted by dispersing iron oxide precursors (FeSO4 and FeCl3) in montmorillonite in the Fe content range of 10–50 wt%. The properties of the nanocomposites were investigated by X-ray diffraction, gas sorption analysis, scanning elect...

The development of an antibacterial scaffold matrix of silver nanoparticle-doped hydroxyapatite using cockle shell as biogenic calcium (Ag/HAcs) has been performed. The silver nanoparticles (AgNPs) were green synthesized using microwave-assisted bioreduction of Ag⁺ using Clitoria ternatea flower extract and the coprecipitation of Ca with an ammoniu...

Gallium nitride (GaN), is a group III nitride semiconductor. Thin films of GaN have beenwidely adopted for both commercial and fundamental research, such as in light-emitting diodes (LEDs) and UV light water-splitting. Much interest has also been paid to the creation of nanostructures of GaN including the morphology of wires, rods, sheets, seeds an...

Single-phase InN nanocrystals were synthesized for the first time by a molten salt-based nitridation approach using InCl3 and LiNH2 as indium and nitrogen sources, respectively. A molten salt, KCl–LiCl, during nitridation, enabled us to obtain InN nanocrystals at relatively low temperatures ranging from 400 °C to 500 °C. SEM and HR-TEM measurements...

Microwave-assisted synthesis method was applied for producing porous clay heterostructure-Zn/Si heterostructure from Indonesian natural montmorillonite. The porous montmorillonite heterostructure was prepared by previously intercalating cetyl trimethyl ammonium as templating agent and surfactant, and trimethyl ammonium hydroxide as co-surfactant, f...

Successful research has been done to extract oil from Ketapang seeds that are converted to biofuel. The method used is Soxhletation and evaporation to get Ketapang seed oil which is continued with conversion to biofuel by catalytic hydrocracking method. Characterization of ZnO catalyst was performed by XRD instrument. From this study, it was found...

Two dimensional (2D) hexagonal-shape gallium nitride (HS-GaN) was synthesized by reacting GaCl3 and LiNH2 with LiCl as the molten salt. We demonstrated that the size and shape of 2D plate-like GaN nanoplates could be controlled under a relatively low temperature from 600 °C to 700 °C. TEM analysis revealed that the single crystal of HS-GaN has a pl...

The synthesis of biocomposite (HA:TCP) – Gelatine – CMC for bone filler material has been carried out. In this research, the ratio of HA and TCP was varied as follows: 70:30, 50:50 and 40:60. The decrease of HA and the increase of TCP concentration will decrease the density, increase the percentage of porosity and swelling. The best composition...

Adsorption of Rhodamine B on Citrus sinesis peel biosorbent has been conducted. The adsorption process was carried out in neutral pH for 90 min. The active surface of the Citrus sinesis peel biosorbent was 15 m2/g and the density was 0.52 g/cm3. The adsorption mechanism of Rhodamine B on Citrus sinesis peel biosorbent was studied using 4 adsorption...

p class="Abstract">Study on the development of computational-based visualization method in Physical Chemistry practical course has been carried out. The study was carried out by combining the conventional method and the visualization using the software. This combination class then was compared to the conventional class of the practical course. The...

In this research, modeling several alkyl p-methoxy cinnamate (APMC) based on electronic transition by using semiempirical mechanical quantum ZINDO/s calculation is performed. Alkyl cinnamates of C1 (methyl) up to C7 (heptyl) homolog with 1-5 example structures of each homolog are used as materials. Quantum chemistry–package software Hyperchem 8.0 i...

Research about the contextual collaborative learning model for chemical bonding course has been carried out. Through this concept, the learning process is conducted by combining the conventional lecture by the lecturer and the foreign lecturer and the combination with computational chemistry. The result of cognitive evaluation test at the beginning...

Telah dilakukan penelitian mengenai sintesis TiO 2 dengan cetakan pati menggunakan metode hidrotermal. Tujuan penelitian ini adalah mengkaji sifat kristalinitas dan porositas TiO 2 berpori hasil sintesis serta aktivitas fotokatalitiknya dalam reaksi fotodegradasi zat warna metilen biru. TiO 2 disintesis menggunakan pati dengan berat bervariasi (0,5...