Synthesis of SnS2/SnO2 Nanocomposite for Visible Light-Driven Photocatalytic Reduction of Aqueous Cr(VI)

2013 ◽  
Vol 538 ◽  
pp. 46-49 ◽  
Author(s):  
Min Yang ◽  
Yong Cai Zhang ◽  
Wei Min Dai ◽  
Ke Hang ◽  
Yue Quan Pan
Keyword(s):  
Visible Light ◽  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Sno2 Nanoparticles ◽  
Diffuse Reflectance Spectrum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Visible Light Driven

SnS2/SnO2 nanocomposite was synthesized by a simple in situ hydrothermal oxidation route, and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, transmission electron microscopy and UV-vis diffuse reflectance spectrum. The as-synthesized SnS2/SnO2 nanocomposite displayed much superior photocatalytic activity to SnS2 and SnO2 nanoparticles in the reduction of aqueous Cr(VI) under visible light (λ > 420 nm) irradiation.

Photocatalysis Reactivity in the Visible Light of B-Doped TiO2 Nanotube Arrays

2013 ◽  
Vol 860-863 ◽  
pp. 907-910
Author(s):  
Xiao Xia Lin ◽  
Jia Liu ◽  
De Gang Fu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectrum ◽  
Nanotube Arrays ◽  
X Ray Diffraction ◽  
Degradation Model ◽  
X Ray ◽  
Light Region

B-doped TiO2nanotube arrays (B-TNTs) were synthesized by anodization method combined with dip-calcination technique. The physicochemical properties and surface morphology were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and UV-Vis diffuse reflectance spectrum (DRS). Methyl blue (MB) solution was utilized as the degradation model to evaluate the photocatalytic activity of B-TNTs under visible light irradiation. The results show B-TNTs shifts the absorption edge of TiO2nanotube arrays to the visible light region and B-TNTs displays higher photocatalytic activity compared with undoped TNTs.

Hydrothermal Synthesis and Photocatalytic Properties of TiO2/SnS2 Nanocomposite

2014 ◽  
Vol 898 ◽  
pp. 23-26
Author(s):  
Jing Li ◽  
Wei Sun ◽  
Wei Min Dai ◽  
Yong Cai Zhang
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Diffuse Reflectance ◽  
Photocatalytic Property ◽  
Deionized Water ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Chloride Pentahydrate

TiO2/SnS2 nanocomposite was synthesized via hydrothermal treatment of tin (IV) chloride pentahydrate, thioacetamide and TiO2 nanotubes in deionized water at 150 °C for 3 h. The structure, composition and optical property of the as-synthesized nanocomposite were characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, transmission electron microscopy and UV-vis diffuse reflectance spectra, and its photocatalytic property was tested in the reduction of aqueous Cr6+ under visible-light (λ > 420 nm) irradiation. It was observed that TiO2 nanotubes exhibited no photocatalytic activity, whereas TiO2/SnS2 nanocomposite exhibited photocatalytic activity in the reduction of aqueous Cr6+ under visible-light (λ > 420 nm) irradiation.

scholarly journals Synthesis of porous LaFeO3 prepared by nanocasting method for photo-Fenton degradation of oily-containing wastewater

2021 ◽  
Vol 11 (1) ◽  
pp. xx-xx
Author(s):  
Nga Phan To ◽  
Lien Nguyen Hong ◽  
Tuyen Le Van ◽  
Nhan Phan Chi ◽  
Huyen Phan Thanh
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
Visible Light ◽  
Diffuse Reflectance Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Catalytic Activities ◽  
Transmission Electron ◽  
Visible Light Driven ◽  
Adsorption Desorption

Porous LaFeO3 were synthesised by nanocasting method using mesoporous silica (SBA-15) as a hard template and used as a visible-light-driven photocatalyst. The as-synthesised LaFeO3 photocatalyst were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray Diffraction (XRD), N2 adsorption-desorption, and Ultraviolet–Visible Diffuse Reflectance Spectroscopy (UV-vis DRS). The photo-Fenton catalytic activities of porous LaFeO3 were investigated for the degradation of oily-containing wastewater. The results showed that porous LaFeO3 had better photo-Fenton catalytic activity under visilbe light irradiation than pure LaFeO3. The remarkable improvement photo-Fenton catalytic activity of porous LaFeO3 material could be attributed to the synergistic effect of adsorption and visible light photo-Fenton processes thanks to its porous structure.

scholarly journals Synthesis of the ZnGa2S4Nanocrystals and Their Visible-Light Photocatalytic Degradation Property

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Ding Peng ◽  
Zhang Min ◽  
Xie Zhonglei ◽  
Cao Lihong
Keyword(s):  
Visible Light ◽  
Band Gap ◽  
Diffuse Reflectance ◽  
Reduction Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Small Band ◽  
Indirect Band Gap ◽  
Visible Light Photocatalytic

Nanostructured ZnGa2S4with indirect band gap was prepared by a simple thiourea reduction method. As-prepared samples were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDX), and UV-Vis diffuse reflectance spectra (UV-Vis). The visible-light photocatalytic activity of the ZnGa2S4was evaluated by the degradation of methylene blue (MB) aqueous solution. The high photoactivities of ZnGa2S4can be attributed to the small band gap and large surface area, which is beneficial for degradation of pollutants and enhancement of transfer of photogenerated carriers.

scholarly journals Facile Solvothermal Synthesis of CuCo2S4 Yolk-Shells and Their Visible-Light-Driven Photocatalytic Properties

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2303 ◽  
Author(s):  
Yinxia Chen ◽  
Xianbing Ji ◽  
Vadivel Sethumathavan ◽  
Bappi Paul
Keyword(s):  
Electron Microscopy ◽  
Visible Light ◽  
Photocatalytic Property ◽  
Shell Shape ◽  
X Ray Diffraction ◽  
Exchange Method ◽  
X Ray ◽  
Transmission Electron ◽  
Visible Light Driven ◽  
Photocatalytic Applications

In this present work, we synthesized a yolk-shell shaped CuCo2S4 by a simple anion exchange method. The morphological and structural properties of the as-synthesized sample were characterized using X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (UV-vis DRS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The SEM and TEM results confirmed that the uniform yolk-shell structure was formed during the solvothermal process. The band gap was about 1.41 eV, which have been confirmed by UV–vis DRS analysis. The photocatalytic property was evaluated by the photocatalytic degradation of methylene blue (MB) dye as a target pollutant under the visible-light irradiation. The experimental results confirmed the potential application of yolk-shell shape CuCo2S4 in visible-light photocatalytic applications.

Preparation and Photocatalytic Properties of Visible-Light-Driven BiVO4/attapulgite Composite

2013 ◽  
Vol 864-867 ◽  
pp. 601-604
Author(s):  
Jin Zhang ◽  
Yu Xin Sun
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Diffuse Reflectance ◽  
Energy Dispersive Spectrometry ◽  
Light Irradiation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Visible Light Range ◽  
Visible Light Driven ◽  
Uv Visible

A novel attapulgite clay-based composite (BiVO4/attapulgite) was successfully prepared as a heterogeneous photocatalyst for degradation of rhodamine B (RhB) dye solution under visible light irradiation. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and microanalysis by energy dispersive spectrometry (EDS), and UV-visible diffuse reflectance spectra (DRS). The results showed that monoclinic BiVO4particles were loaded successfully on to the surface of attapulgite fibers and were widely dispersed. The DRS spectrum reveals that the BiVO4/attapulgite composite had much stronger absorption in the visible light range of 420-800 nm. Correspondingly, the BiVO4/attapulgite composite showed significantly higher activity in degrading RhB solution under visible-light irradiation compared to that of pure BiVO4.

Visible-Light Driven C3N4 Photocatalysts Prepared by a Thermal Decomposition Process

2012 ◽  
Vol 178-181 ◽  
pp. 512-515
Author(s):  
Huai Feng Ma ◽  
Pei Song Tang
Keyword(s):  
Thermal Decomposition ◽  
Visible Light ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy ◽  
X Ray Diffraction ◽  
Thermal Decomposition Process ◽  
X Ray ◽  
Lamellar Texture ◽  
Visible Light Driven

The C3N4was synthesized by directly thermal decomposition melamine in N2atmosphere furnace. The products were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-Vis diffuse reflectance spectroscopy (DRS). The results show that C3N4indicates the typical slate-like, stacked lamellar texture of about 1μm in diameter, and a band gap of about 2.78 eV. The photocatalytic experiment shows the good photocatalytic activity for the decomposition of methyl orange (MO) under visible-light irradiation, which is attributed to the strong visible-light absorption.

Microstructure and Optical Properties of Fe-Doped SnO2 Nanoparticles Synthesized by Hydrothermal Method

2007 ◽  
Vol 26-28 ◽  
pp. 683-686 ◽  
Author(s):  
L.M. Fang ◽  
Xiao Tao Zu
Keyword(s):  
Optical Properties ◽  
Hydrothermal Method ◽  
Diffuse Reflectance ◽  
Sno2 Nanoparticles ◽  
Hydrothermal Process ◽  
Rutile Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Fe Content

Fe-doped SnO2 nanoparticles have been synthesized by a simple hydrothermal method. After Fe doping, the as-prepared SnO2 samples were calcined at different temperature from 350-800 °C in air for 1 h. The effects of Fe dopant and calcination on the microstructure and optical properties are investigated using X-ray diffraction (XRD), High resolution transmission electron microscopy (HRTEM) , UV-VIS diffuse reflectance spectra (DRS). Results show that the Fe-doped SnO2 crystallites with the rutile phase was directly synthesized during hydrothermal process without calcination. A dramatically red shift in the absorbing band edge was observed with the decreasing crystallite size result from the increasing Fe content.

Preparation of Polyaniline–ZnO Photocatalyst and its Photocatalytic Property

2011 ◽  
Vol 356-360 ◽  
pp. 519-523
Author(s):  
Hong Chao Ma ◽  
Yang Zhang ◽  
Ying Huan Fu ◽  
Chun Ling Yu ◽  
Yu Song ◽  
...  
Keyword(s):  
Visible Light ◽  
Zno Nanoparticles ◽  
Oxidative Polymerization ◽  
Photocatalytic Property ◽  
X Ray Diffraction ◽  
Anthraquinone Dye ◽  
X Ray ◽  
Transmission Electron ◽  
Diffraction Patterns

ZnO nanoparticles were modified by polyaniline (PANI) using ‘in situ’ chemical oxidative polymerization method. The morphology, structure, and light absorption properties of PANI-ZnO composites were examined by powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV–vis spectra. UV–vis spectra reveal that PANI-ZnO composites showed stronger absorption than neat ZnO under the whole range of visible light. New characteristic peaks were found in PANI-ZnO composites according to the X-ray diffraction patterns after hybridization of PANI and ZnO, which indicating that there was a strong interaction between PANI and ZnO nanoparticles. The resulting PANI-ZnO composites exhibit significantly higher photocatalytic activity than that of neat ZnO for degradation of anthraquinone dye (reactive brilliant blue KN-R) aqueous solution under visible light irradiation (λ > 420 nm).

New Titanium Oxide Compound for Photocatalytic Water Splitting, Hydrous Na16Ti10O28

2009 ◽  
Vol 421-422 ◽  
pp. 546-549
Author(s):  
Sae Nakajima ◽  
Soihiro Watanabe ◽  
Kazuyoshi Uematsu ◽  
Tadashi Ishigaki ◽  
Kenji Toda ◽  
...  
Keyword(s):  
Water Splitting ◽  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Diffuse Reflectance Spectrum ◽  
H2 Evolution ◽  
X Ray Diffraction ◽  
Oxide Compound ◽  
Co Catalyst ◽  
X Ray ◽  
Scanning Electron

Photochemical splitting of water into H2 and O2 using solar energy is process of great economic and environmental interest. In this study, we investigated novel photocatalytic compound, Na16Ti10O28, for water splitting. Na16Ti10O28 was prepared by solid-state reaction at 900 oC for 1 h. Prepared sample was characterized using powder X-ray diffraction, diffuse reflectance spectrum, and scanning electron microscopy. As-prepared Na16Ti10O28 sample is easily hydrated in water. Hydrous Na16Ti10O28 showed H2 evolution without co-catalyst.

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