Preparation and Characterization of Bimetal and Nitrogen Co-Modified Titanium with Visible-Light Activity

2011 ◽  
Vol 197-198 ◽  
pp. 817-820
Author(s):  
Xin Xin Guan ◽  
Wen Wen Shen ◽  
Fu Xiang Zhang ◽  
Nai Jia Guan
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Diffuse Reflectance ◽  
Catalytic Reduction ◽  
Photocatalytic Reduction ◽  
Reflectance Spectrophotometry ◽  
Light Activity

TiO2photocatalyst modified with N and Fe (Fe-TiO2-xNx) was obtained. Bimetal and nitrogen co-modified TiO2(Ag/Fe-TiO2-xNx) was prepared by photo catalytic reduction of Ag on the Fe and nitrogen co-modified TiO2. The catalytic activity of sample for photocatalytic reduction of nitrate under visible light was tested. And the bimetal and nitrogen co-modified TiO2was characterized by XRD, XPS, TEM and UV-vis diffuse reflectance spectrophotometry.

scholarly journals A Review on the Catalytic Hydrogenation of Bromate in Water Phase

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 365
Author(s):  
Jose Luis Cerrillo ◽  
Antonio Eduardo Palomares
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Reaction Mechanisms ◽  
Catalytic Reduction ◽  
Environmental Concern ◽  
Chemical Reduction ◽  
Catalyst Stability ◽  
Polluted Water ◽  
Water Composition

The presence of bromate in water sources generates environmental concern due to its toxicity for humans. Diverse technologies, like membranes, ion exchange, chemical reduction, etc., can be employed to treat bromate-polluted water but they produce waste that must be treated. An alternative to these technologies can be the catalytic reduction of bromate to bromide using hydrogen as a reducing agent. In this review, we analyze the research published about this catalytic technology. Specifically, we summarize and discuss about the state of knowledge related to (1) the different metals used as catalysts for the reaction; (2) the influence of the support on the catalytic activity; (3) the characterization of the catalysts; (4) the reaction mechanisms; and (5) the influence of the water composition in the catalytic activity and in the catalyst stability. Based on published papers, we analyze the strength and weaknesses of this technique and the possibilities of using this reaction for the treatment of bromate-polluted water as a sustainable process.

Preparation and Characterization of Fe-Doped BiVO4

2009 ◽  
Vol 620-622 ◽  
pp. 655-658 ◽  
Author(s):  
Li Li Liang ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Chang Gang Xu ◽  
Zhao Zhao
Keyword(s):  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy ◽  
Fe Doping ◽  
Monoclinic Crystal ◽  
Electrochemical Behaviors ◽  
Ftir Characterization ◽  
Light Activity ◽  
Uv Diffuse Reflectance Spectroscopy

Monoclinic crystal bismuth vanadate (BiVO4) was synthesized by the high temperature solid state reaction after ball milling the materials of Bi2O3 and V2O5. The influences of sintering times on the crystal phases and structures of BiVO4 powders were studied through the XRD、FTIR characterization. Fe-doped BiVO4 was prepared by doping ferric chloride to pure monoclinic crystal BiVO4 to improve the photo absorbance performance of BiVO4 and to promote the isolation of photo-induced carriers. Visible light activity of BiVO4 and Fe-doping BiVO4 were characterized using the UV-diffuse reflectance spectroscopy. The electrochemical behaviors of BiVO4 and Fe-doping BiVO4 were investigated under the condition of avoiding light or under light.

scholarly journals Preparation of recyclable MoO3 nanosheets for visible-light driven photocatalytic reduction of Cr(vi)

RSC Advances ◽  
2019 ◽  
Vol 9 (49) ◽  
pp. 28768-28774
Author(s):  
Wenxian Wei ◽  
Zhenxin Zhang ◽  
Guoxiang You ◽  
Yun Shan ◽  
Zuozheng Xu
Keyword(s):  
Heavy Metals ◽  
Catalytic Activity ◽  
Visible Light ◽  
Photocatalytic Reduction ◽  
High Catalytic Activity ◽  
Significant Challenge ◽  
Earth Abundant ◽  
Visible Light Driven

The exploitation of stable and earth-abundant photocatalysts with high catalytic activity remains a significant challenge for removing heavy metals from wastewater.

Sol-solvothermal preparation and characterization of (Yb, N)-codoped anatase–TiO2 nano-photocatalyst with high visible light activity

2013 ◽  
Vol 139 (2-3) ◽  
pp. 1014-1022 ◽  
Author(s):  
Panpan Yan ◽  
Hongquan Jiang ◽  
Shuying Zang ◽  
Jingshen Li ◽  
Qingyuan Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Anatase Tio2 ◽  
Light Activity ◽  
Solvothermal Preparation

Preparation and characterization of SiO2/BiOX (X = Cl, Br, I) films with high visible-light activity

RSC Advances ◽  
2015 ◽  
Vol 5 (7) ◽  
pp. 4918-4925 ◽  
Author(s):  
Fan Shen ◽  
Li Zhou ◽  
Jiajia Shi ◽  
Mingyang Xing ◽  
Jinlong Zhang
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Layered Structures ◽  
Light Irradiation ◽  
Gel Method ◽  
Light Activity

SiO2/BiOX (X = Cl, Br, I) thin films with layered structures were prepared using a convenient sol–gel method. The films show a high and stable photocatalytic activity under visible-light irradiation.

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