scholarly journals Modification of Spent Bleaching Earth with WO3 and the Application for Photocatalytic Degradation of Waste Dyestuff under Solar Light

2020 ◽  
Vol 8 (2) ◽  
pp. 84-89
Author(s):  
Noor Hindryawati ◽  
Aman Sentosa Panggabean ◽  
Dirgarini Julia Nurlianti Subagyono ◽  
Rinda Anisyah Putri ◽  
Prilianda Kusmiaty ◽  
...  
Keyword(s):  
Bleaching Earth ◽  
Catalytic Performance ◽  
Morphological Characterization ◽  
Solar Light ◽  
Blue Dye ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dioctahedral Smectite ◽  
Dioctahedral Mica ◽  
Scanning Electron

Degradation of blue dye waste in Sarong Samarinda production using WO3-bleaching earth (BE) has been conducted. Structural and morphological characterization has conducted using X-ray diffraction (XRD), and Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX). The X-ray diffraction results show the mineral on bleaching earth is rectorite dioctahedral mica layer and dioctahedral smectite with a ratio 2:1. The WO3 pattern is appeared after the calcination. After calcination at 500°C, the WO3 is deposited homogeneously on the BE surface. The catalytic performance of WO3-BE for photodegradation of the blue dye waste under the solar light is 99.85 % within 1 h.

scholarly journals Investigations of M3Al8O15:Eu3+,Dy3+ (M = Ba, Ca, Mg) phosphors

2016 ◽  
Vol 34 (2) ◽  
pp. 412-417
Author(s):  
Esra Öztürk
Keyword(s):  
Electron Microscopy ◽  
Solid State Reaction Method ◽  
Morphological Characterization ◽  
X Ray Diffraction ◽  
Reaction Method ◽  
X Ray ◽  
Three Samples ◽  
Scanning Electron ◽  
The Eu

AbstractIn this work, aluminate type phosphorescence materials were synthesized via the solid state reaction method and the photoluminescence (PL) properties, including excitation and emission bands, were investigated considering the effect of trace amounts of activator (Eu3+) and co-activator (Dy3+). The estimated thermal behavior of the samples at certain temperatures (> 1000 °C) during heat treatment was characterized by differential thermal analysis (DTA) and thermogravimetry (TG). The possible phase formation was characterized by X-ray diffraction (XRD). The morphological characterization of the samples was performed by scanning electron microscopy (SEM). The PL analysis of three samples showed maximum emission bands at around 610 nm, and additionally near 589 nm, 648 nm and 695 nm. The bands were attributed to typical transitions of the Eu3+ ions.

scholarly journals EFFECT OF OPERATIONAL PARAMETER ON PHOTOCATALYTIC DEGRADATION OF OXAMYL PESTICIDE

2020 ◽  
Vol 4 (12) ◽  
pp. 74-84
Author(s):  
Brijesh Pare ◽  
Satish Piplode ◽  
Vaishali Joshi
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Room Temperature ◽  
Light Irradiation ◽  
Solar Light ◽  
X Ray Diffraction ◽  
Operational Parameter ◽  
X Ray ◽  
Solar Light Irradiation ◽  
Scanning Electron

Flower like bismuth oxy chloride (BiOCl) was successfully synthesized by a simple hydrolytic method at room temperature. The precursor and as-prepared samples were characterized by X-ray diffraction (XRD), High Resolution Field Emission Scanning Electron Microscope (HR FESEM). The results indicated that the as-prepared BiOCl sample is self-assembled hierarchically with nano sheets. The photocatalytic activity of BiOCl was tested on the degradation of the Oxamyl (OM) under solar light irradiation. The results showed that pesticide molecules could be efficiently degraded over BiOCl under solar light irradiation. All the experiment were carried out in the following reaction condition, [OM] = 10-4 mol dm-3, BiOCl NPs= 40mg/50ml, pH= 6.3. Effect of operational parameter such as concentration of H2O2, K2S2O8, FeCl3, Fenton’s reagent (Fe3+/H2O2) and N2, O2 purging on the photocatalytic degradation was observed.

scholarly journals Degradation of Methylene Blue Dye in the Presence of Visible Light Using SiO2@α-Fe2O3 Nanocomposites Deposited on SnS2 Flowers

2018 ◽  
Author(s):  
Sridharan Balu ◽  
Kasimayan Uma ◽  
Guan-Ting Pan ◽  
Thomas C.-K. Yang ◽  
Sayee Kannan Ramaraj
Keyword(s):  
Methylene Blue ◽  
Three Dimensional ◽  
Semiconductor Materials ◽  
Blue Dye ◽  
Core Shell ◽  
Methylene Blue Dye ◽  
X Ray Diffraction ◽  
Facile Hydrothermal Method ◽  
X Ray ◽  
Scanning Electron

Semiconductor materials have been shown to have better photocatalytic behavior and can be utilized for the photodegradation of organic pollutants. In this work, three-dimensional flower-like SnS2 were synthesized by a facile hydrothermal method. Core-shell structured SiO2@α-Fe2O3 nanocomposites were then deposited on the top of the SnS2 flowers. The as-synthesized nanocomposites were characterized by X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FE-SEM), Brunauer-Emmett-Teller (BET) and photoluminescence spectroscopy (PL). The photocatalytic behavior of the SnS2-SiO2@α-Fe2O3 nanocomposites was observed by observing the degradation of methylene blue (MB). The results show an effective enhancement of photocatalytic activity for the degradation of MB especially for the 15 wt. % SiO2@α-Fe2O3 nanocomposites on SnS2 flowers.

Synthesis, Characterization and Catalytic Performance of Nanoferrites Subjected to the Esterification Reaction

2014 ◽  
Vol 775-776 ◽  
pp. 421-426 ◽  
Author(s):  
Adriano Santana Silva ◽  
Joelda Dantas ◽  
J.R.D. Santos ◽  
R.B.L. Cunha ◽  
R.H.G.A. Kiminami ◽  
...  
Keyword(s):  
Active Catalyst ◽  
Catalytic Performance ◽  
Esterification Reaction ◽  
X Ray Diffraction ◽  
Inverse Spinel ◽  
Agglomerate Size ◽  
X Ray ◽  
Conversion Rates ◽  
Xrd Patterns ◽  
Scanning Electron

Ni0.5Zn0.5Fe2O4, Mn0.5Zn0.5Fe2O4and Ni0.2Cu0.3Zn0.5Fe2O4nanoferrites were synthesized, characterized and evaluated in terms of their performance as catalysts in the methyl esterification reaction of soybean oil. The nanoferrites were synthesized by combustion and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The XRD patterns show the presence of inverse spinel B(AB)2O4phase. The EDX results confirmed the stoichiometry of the nanoferrite systems, whose morphology consisted of large block-like agglomerates with a brittle aspect and a wide agglomerate size distribution. The results indicate that the Ni0.5Zn0.5Fe2O4nanoferrite was the most active catalyst in the esterification reaction, with conversion rates ranging from 40 to 91%.

Preliminary Research on the Preparation of Ce-Doped TiO2 by Sol Method

2013 ◽  
Vol 785-786 ◽  
pp. 745-748
Author(s):  
Deng Liang He ◽  
Shi Xin Fang
Keyword(s):  
Electron Microscope ◽  
Methyl Orange ◽  
Scanning Electron Microscope ◽  
Room Temperature ◽  
Raw Materials ◽  
Catalytic Performance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Preliminary Research ◽  
Scanning Electron

butyl titanate, water and anhydrous ethanol were used as raw materials; Cerium-doped TiO2 was prepared by sol method at room temperature. Then it was characterized by X ray diffraction, Raman spectra, Uv-vis absorption spectra and Scanning Electron Microscope. The results show that TiO2 crystal can be got by sol method at room temperature. Cerium-doped TiO2 has the better catalytic performance for methyl orange.

Synthesis and catalytic performance of MCM-41 modified with tetracarboxylphthalocyanine

2013 ◽  
Vol 67 (4) ◽  
Author(s):  
Ya-Ping Zhang ◽  
Ke-Chuang Xue ◽  
Wei-Ping Zhang ◽  
Chao Song ◽  
Rong-Lan Zhang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Catalytic Performance ◽  
Conversion Ratio ◽  
X Ray Diffraction ◽  
Amino Groups ◽  
N2 Adsorption ◽  
X Ray ◽  
Adsorption Desorption ◽  
Mcm 41 ◽  
Scanning Electron

AbstractA series of tetracarboxylphthalocyanines (MPc(COOH)4, M = H, Mn(II), Fe(II), Co(II), Ni(II), Cu(II), and Zn(II)) were anchored onto MCM-41 by the following procedures: functionalization of MCM-41 with (EtO)3SiCH2CH2CH2NH2 reacting with surface Si-OH, and anchoring MPc(COOH)4 onto MCM-41 with a substitution reaction between chloroformyl and amino groups. The samples were characterized by infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, N2 adsorption-desorption, and X-ray photoelectron spectroscopy. Catalytic activity of oxidation was tested using solutions of ethanethiol in petroleum ether and thiophene in octane; CoPc-CONH-MCM-41 displayed the highest conversion ratio of 90.15 % and 93.79 %, respectively.

Synthesis and Catalytic Performance of Al-Pillared Clays Supported Fe3O4 Nanoparticles

2012 ◽  
Vol 581-582 ◽  
pp. 292-296 ◽  
Author(s):  
Guang Hua Wang ◽  
Yun Zhou Lu ◽  
Wen Bing Li ◽  
Xue Qin Liu ◽  
Ming Dong Sun
Keyword(s):  
Electron Microscopy ◽  
Heterogeneous Catalysts ◽  
Catalytic Performance ◽  
Regeneration Ability ◽  
Orange Ii ◽  
X Ray Diffraction ◽  
X Ray ◽  
Batch Tests ◽  
Co Precipitation ◽  
Scanning Electron

Al-pillared bentonite supported Fe3O4 nanoparticles were prepared by co-precipitation and characterized with X-ray diffraction (XRD), specific surface area (BET) and scanning electron microscopy (SEM). The supported Fe3O4 nanoparticles exist on the surface of clays, with better dispersing and no obvious aggregation than the ones without bentonite support. Batch tests were carried out to investigate the catalytic oxidation Orange II by the obtained heterogeneous catalysts. The effect of pH, temperature and initial H2O2 concentration on degradation was discussed, and the regeneration ability of catalyst was also studied.

scholarly journals Effect of preparation method in the properties of iron oxide catalysts for fenton reaction

2020 ◽  
Vol 6 (5) ◽  
pp. 0607-0616
Author(s):  
Fabiana Maria Barbosa ◽  
Andre Rosa Martins
Keyword(s):  
Methylene Blue ◽  
Iron Oxide ◽  
Fenton Reaction ◽  
Combustion Method ◽  
Catalytic Performance ◽  
Area Measurement ◽  
Blue Dye ◽  
X Ray Diffraction ◽  
X Ray ◽  
Model Molecule

This work discusses methods of preparing iron oxide for the Fenton reaction, using methylene blue as a model molecule. The solids were prepared by precipitation, complexation, combustion, and decomposition and characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electronic microscopy, energy dispersive X-ray spectroscopy, specific surface area measurement and were evaluated for methylene blue removal. The method influenced the structural and surface properties of the solids, and consequently the catalytic performance of the solids. The solid prepared by precipitation showed the highest area, amorphous phase, and the best performance in the adsorption test. On the other hand, the combustion method favored the formation of hematite and traces of magnetite.  The solid prepared by this method showed higher values of the methylene blue dye oxidation./Este trabalho discute métodos de preparação de óxido de ferro para a reação de Fenton, utilizando o azul de metileno como molécula modelo. Os sólidos foram preparados por precipitação, complexação, combustão e decomposição e caracterizados por espectroscopia de infravermelho por transformada de Fourier, difração de raios-X, microscopia eletrônica de varredura, espectroscopia de energia dispersiva de raios-X, medição de área superficial específica e foram avaliados para remoção de azul de metileno. O método influenciou as propriedades estruturais e superficiais dos sólidos e, consequentemente, o desempenho catalítico dos sólidos. O sólido preparado por precipitação apresentou a maior área, fase amorfa e melhor desempenho no teste de adsorção. Por outro lado, o método de combustão favoreceu a formação de hematita e vestígios de magnetita.  O sólido preparado por este método apresentou valores mais altos de oxidação do azul de metileno.

Characterization and Application of Expanded Graphite Coated by Fe3O4 Nanoparticles

2011 ◽  
Vol 356-360 ◽  
pp. 554-557 ◽  
Author(s):  
Cheng Jin ◽  
Jin Hui Dong ◽  
Deng Xin Li ◽  
Min Cong Zhu ◽  
Ying Chen Zhang
Keyword(s):  
Methylene Blue ◽  
Infrared Spectroscopy ◽  
Hydrothermal Reaction ◽  
Expanded Graphite ◽  
Catalytic Performance ◽  
Electron Micrograph ◽  
X Ray Diffraction ◽  
Scanning Electron Micrograph ◽  
X Ray ◽  
Scanning Electron

The expanded graphite coated with different portions of Fe3O4 nanoparticles (EG/ Fe3O4) were synthesized by a simple hydrothermal reaction and the composite was characterized by scanning electron micrograph (SEM), X-ray diffraction (XRD) and infrared spectroscopy (IR). The catalytic performance of the composite was studied through the degradation of methylene blue. The results indicated that a complete and uniform Fe3O4 nanoparticles coating on expanded graphite could be obtained under routine pressure and temperature and the optimum content of Fe3O4 in the composite was 6wt% in the experiment of catalytic degradation of methylene blue.

Preparation of Cellulose Micro/Nano Fibrils by Sonochemical Method and its Morphological Characterization

2013 ◽  
Vol 562-565 ◽  
pp. 864-868
Author(s):  
Yan Wu ◽  
Zhi Hui Wu ◽  
Ji Lei Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Morphological Characterization ◽  
Sonochemical Method ◽  
Wide Angle ◽  
Chemical Pretreatment ◽  
X Ray Diffraction ◽  
X Ray ◽  
Basic Characteristics ◽  
Scanning Electron

The eucalyptus cellulose micro/nano fibrils were prepared by using high intensity ultrasonication with chemical pretreatment. The basic characteristics of cellulose micro/nano fibrils were evaluated by wide-angle X-ray diffraction instrument (WAXD) and scanning electron microscopy (SEM).

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