PREPARATION AND MECHANISTIC STUDY OF ZnO/ZEOLITE AS CATALYST IN 1-PENTANOL DEHYDRATION

Preparation of zinc oxide impregnated zeolite from natural zeolite and its catalytic activity in pentanol dehydration was investigated. The impregnation process was conducted by two main steps; chemical activation followed by wet impregnation using ZnSO4.7H2O as precursor and the characterization of prepared material was conducted by X-ray diffraction, scanning electron microscope (SEM-EDX) and surface acidity measured by pyridine adsorption-FTIR spectrophotometric method. As catalytic activity evaluation, pentanol dehydration over prepared material under vapor phase reaction mechanism was conducted by varied temperature of 300,400, 500 and 700oC. For mechanistic study, the product of reactions was analyzed by using gas chromatographymass spectrometry(GC-MS) . It is found that temperature affect strongly to the reaction mechanism in that at the temperature of above 500oC the etherification was occured. From the comparation with zeolite, it can be noticed that the role of solid acidity also influences the reaction mechanism

Synthesis of Metal and Metal Oxide Nanoparticles Using Plant Extract: a Review

Nanotechnology is an emerging technology and it is related to various applications. Related to nanotechnology development, the use of green chemistry concept, low cost technology and sustainability is a must. Synthesis of nanoparticles using plant extract is a developing technique within the scheme. In this paper, study on metal/metal oxide synthesis and its aspects is presented for describing the potency of natural resources for nanoparticle synthesis within green chemistry approach

Physicochemical and Photocatalytic Properties of Fe-Pillared Bentonite at Various Fe Content

Iron-pillared bentonites (Fe/Bents) were successfully prepared using a ferric chloride precursor. The prepared samples were characterized using XRD, BET and SEM-EDX. The results show that the pillared bentonite physicochemical character is affected by the iron content in a precursor solution. By Fe content variation it is found that Fe content in Fe/Bents is not linearly correlated with the specific surface area and the increased in d001 in which both the maximum specific surface are and d001 reach maximum at the Fe content of 20 mmol/g. Due to the kinetics of photocatalytic activity in phenol removal, it is concluded that in photo-Fenton-like processes. Copyright © 2016 BCREC GROUP. All rights reserved Received: 29th March 2016; Revised: 30th August 2016; Accepted: 1st September 2016 How to Cite: Fatimah, I., Nurkholifah, Y.Y. (2016). Physicochemical and Photocatalytic Properties of Fe-Pillared Bentonite at Various Fe Content. Bulletin of Chemical Reaction Engineering & Catalysis, 11 (3): 398-405 (doi:10.9767/bcrec.11.3.456.398-405) Permalink/DOI: http://doi.org/10.9767/bcrec.11.3.456.398-40

N-[3-(Trimethoxysilyl)propyl] ethylenediamine Functionalized Saponite as Adsorbent of Nickel from Aqueous Solution

Surface modification of saponite clay by surface functionalization using N-[3-(Trimethoxysilyl)propyl]ethylenediamine was performed. This study of the physicochemical characteristics of modified saponite as a function of its functional compound content was investigated using XRD, a gas sorption analyzer, FTIR, TG analysis and SEM. It was observed that the content of N-[3-(Trimethoxysilyl)propyl]ethylenediamine increases the basal spacing (d001) of the saponite structure, which changes the specific surface area and surface profile of the solid. The study of nickel adsorption provides evidence of the increased adsorption capacity of the modified saponite. The adsorption follows pseudo-second order kinetics and fits the Langmuir, Temkin and Dubinin-Radushkevich (D-R) adsorption isotherms. Increased content of the modifying agent results in increased adsorption capacity. The material is reusable because regenerated materials retain greater than 90% of the adsorption capacity of fresh material.Surface modification of saponite clay by surface functionalization using N-[3-(Trimethoxysilyl)propyl]ethylenediamine was performed. This study of the physicochemical characteristics of modified saponite as a function of its functional compound content was investigated using XRD, a gas sorption analyzer, FTIR, TG analysis and SEM. It was observed that the content of N-[3-(Trimethoxysilyl)propyl]ethylenediamine increases the basal spacing (d001) of the saponite structure, which changes the specific surface area and surface profile of the solid. The study of nickel adsorption provides evidence of the increased adsorption capacity of the modified saponite. The adsorption follows pseudo-second order kinetics and fits the Langmuir, Temkin and Dubinin-Radushkevich (D-R) adsorption isotherms. Increased content of the modifying agent results in increased adsorption capacity. The material is reusable because regenerated materials retain greater than 90% of the adsorption capacity of fresh material

Synthesis, Characterization and Aplication of TiO2 Alumina Pillared Montmorillonite Photocatalyst

Dispersion of TiO2 on montmorillonite pillared aluminium has been done successfully. The photocatalyst were prepared by intercalation of Al13 onto natural montmorillonite and then calcined at 500oC. Titania dispersion onto aluminium pillared montmorillonite was carried out by impregnation method at the theoritic concentration of 0.4, 0.8, 1 and 3% titania. The photocatalyst then characterized by XRD, porosimetry, SEM and Diffuse Reflectance Visible methods. Results of characterization showed that the basal spacing and specific surface area as well as total pore volume were decreased after dispersion of TiO2 on PILM, meanwhile SEM image exhibited that beside in the pores of PILM, the TiO2 was also dispersed on the surface of PILM. DR UV characterization result indicated that the band gap of TiO2 dispersed PILM for Ti/PILM 0,8%, Ti/PILM 1% and Ti/PILM 3% was 3.66, 3.19 and 3.19 eV respectively. Photodegradation optimum of methyl orange was found to be at Ti/PILM 1

Uji Sinergisitas Antioksi Dan Ekstrak Kloroform Daun Teh (Camellia Sinensis) Dengan -Tokoferol Menggunakan Pendekatan Kemometri

Aim of this research is to know factor influenced to antioxidative activity of chloroform extract oftea leaf ( Camellia sinensis) with -tocopherol in peanut oil system. Research was done by takedata of peroxide value, tiocyanic acid value dan barbituric acid value of the system addedantioxidant at various concentration. Variance analysis was investigated to the data by interpretingfactors consist of time, extract concentration and -tocopherol concentration followed bydetermination of regression model. Result showed that time, extract concentration and -tocopherolconcentration influence to the antioxidative activity and there was interaction effect of the factors.Optimum condition gained at time of 60 minutes, -tocopherol concentration of 110 ppm andextract concentration of 100 ppm. The model resulted from this analysis can be used to predictsynergistic effect between chloroform extract of tea leaf with -tocopherol

BIOSYNTHESIS AND CHARACTERIZATION OF ZnO NANOPARTICLES USING RICE BRAN EXTRACT AS LOW-COST TEMPLATING AGENT

ZnO nanoparticles (ZnO NPs) is one of important material in nanotechnology. Refer to green chemistry principles, the use of plant extract as reagent for nanoparticle synthesis has been highlighted. In present work, biosynthesis of ZnO nanoparticles (ZnO NPs) using rice bran as template, is discussed. The synthesis was conducted by refluxing ethanolic extract of rice bran powder with zinc acetate precursor followed by drying and calcination due to differential thermal analysis-thermal gravimetric (DTA-TGA) analysis. The synthesized ZnO NPs was characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electrone microscope (TEM), diffuse reflectance-Ultra Violet (DRS-UV) spectrophotometry and gas sorption analyzer. The data shows that ZnO nanoparticles were formed with the mean particle size of 17.16 nm and the band gap energy of 3.18 eV. The material demonstrates the photocatalytic activity in bromo phenol blue (BPB) photodegradation and antibacterial activity against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa bacteria

Effect of Aluminium Content in Aluminium Pillared Montmorillonite on Its Surface Acidity Properties

Aluminium pillared montmorillonites from Indonesian natural montmorillonite has been prepared using Al13 Keggin ion pillaring precursor in varied concentrations. Herein we studied their characterization and catalysis application for esterification reaction. X-ray diffraction (XRD), energy dispersive x-ray analysis (EDX), and BET gas sorption analysis were employed to characterize the prepared materials besides the characterization on surface acidity by pyridine and n-butylammine adsorptions and FTIR analysis. The result showed that significant improvement on physicochemical character data was obtained by a pillarization process. Such a process also provided improvements on catalytic activities in esterification reactions. The effect of aluminium content on material characters was discussed in this paper. It was observed from the catalytic activity tests that pillared montmorillonite samples demonstrated higher activity in esterification reaction relative to the raw montmorillonite. It was found that surface profile of materials consist of specific surface area, pore volume and Lewis acidity were significantly affect the catalyst activity