Preparation of TiO2 (Au) Nanotubes by Hydrothermal Method for Photocatalytic Reduction of Cd2+ Ions

2014 ◽  
Vol 609-610 ◽  
pp. 375-381
Author(s):  
Chun Xiao Feng ◽  
Guang Qing Xu ◽  
Jun Lv ◽  
Zhi Xiang Zheng ◽  
Yu Cheng Wu
Keyword(s):  
Hydrothermal Method ◽  
Au Nanoparticles ◽  
Reduction Method ◽  
Photocatalytic Reduction ◽  
Photocatalytic Properties ◽  
Absorption Intensity ◽  
Reducing Ability ◽  
Highly Dispersed ◽  
Naoh Solution ◽  
Hydrothermal Reduction

Highly dispersed TiO2 nanotubes (TiO2-NTs) were synthesized via the reaction of anatase TiO2 powder with NaOH solution. Au nanoparticles of about 5 nm were deposited on the surface of TiO2-NTs with hydrothermal reduction method. The prepared nanocomposites were well characterized with TEM and XRD. Their photocatalytic properties and reducing ability were investigated by UV-Vis absorption and photocatalytic reduction of Cd2+ ions with different amount of TiO2-NTs and TiO2-NTs (Au) varying from 0.1g to 0.001g. The results from absorption patterns and AAS showed that the absorption intensity of TiO2-NTs (Au) was higher compared with that of TiO2-NTs. Moreover, the concentration of remanent Cd2+ (0.48mg/L) using TiO2-NTs (Au) was lower than that of Cd2+ (0.65mg/L) using TiO2-NTs.

scholarly journals Selective photocatalytic reduction of CO2 to methanol in CuO-loaded NaTaO3 nanocubes in isopropanol

2016 ◽  
Vol 7 ◽  
pp. 776-783 ◽  
Author(s):  
Tianyu Xiang ◽  
Feng Xin ◽  
Jingshuai Chen ◽  
Yuwen Wang ◽  
Xiaohong Yin ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
High Activity ◽  
Hydrothermal Method ◽  
Oxidation Product ◽  
Photocatalytic Reduction ◽  
Band Theory ◽  
Good Crystallinity ◽  
Naoh Solution ◽  
Reduction Of Co2 ◽  
Selective Formation

A series of NaTaO3 photocatalysts were prepared with Ta2O5 and NaOH via a hydrothermal method. CuO was loaded onto the surface of NaTaO3 as a cocatalyst by successive impregnation and calcination. The obtained photocatalysts were characterized by XRD, SEM, UV–vis, EDS and XPS and used to photocatalytically reduce CO2 in isopropanol. This worked to both absorb CO2 and as a sacrificial reagent to harvest CO2 and donate electrons. Methanol and acetone were generated as the reduction product of CO2 and the oxidation product of isopropanol, respectively. NaTaO3 nanocubes loaded with 2 wt % CuO and synthesized in 2 mol/L NaOH solution showed the best activity. The methanol and acetone yields were 137.48 μmol/(g·h) and 335.93 μmol/(g·h), respectively, after 6 h of irradiation. Such high activity could be attributed to the good crystallinity, morphology and proper amount of CuO loading, which functioned as reductive sites for selective formation of methanol. The reaction mechanism was also proposed and explained by band theory.

The Morphology Control of Nano-Cu2O and Study on its Phototocatalytic Properties in the Treatment of Chromium-Containing Wastewater

2012 ◽  
Vol 482-484 ◽  
pp. 2559-2562
Author(s):  
Bin Zhao ◽  
Di Ma
Keyword(s):  
Particle Size ◽  
Reaction Temperature ◽  
Reduction Method ◽  
Morphology Control ◽  
Chemical Precipitation ◽  
Photocatalytic Properties ◽  
Important Relationship ◽  
Naoh Solution ◽  
Crystal Type

The sphere-like nano-Cu2O was prepared by chemical precipitation and reduction method, the different size of sample was obtained by adjusting reaction temperature and concentration of NaOH solution. Cu2O was characterized by XRD and SEM, respectively. The results indicate that the homogeneity of Cu2O particles is related to the reaction temperature while the crystal type to the concentration of NaOH solution. The effects of the different particle size on the photocatalytic properties in the treatment of chromium(Ⅵ)-containing water was performed, the results show that there exists an important relationship between them, that is the excellent properties can be obtained with smaller size of Cu2O.

The Composite of CuO/Diatomaceous Shale Prepared by Hydrothermal Method and Their Photocatalytic Properties

2019 ◽  
Vol 55 (1) ◽  
pp. 1900166
Author(s):  
Ziyi Wang ◽  
Binhua Cao ◽  
Zhijun Wang ◽  
Qiao Chen ◽  
Yongqian Wang
Keyword(s):  
Hydrothermal Method ◽  
Photocatalytic Properties

Facile synthesis of monodispersed yolk-shelled molybdenum disulfide microspheres with enhanced photocatalytic properties

2018 ◽  
Vol 5 (12) ◽  
pp. 3082-3090 ◽  
Author(s):  
Yongxing Zhang ◽  
Yuanyuan Zhao ◽  
Jia Li ◽  
Li Li ◽  
Yi Liu ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Molybdenum Disulfide ◽  
Photocatalytic Properties ◽  
Facile Synthesis

Monodispersed yolk-shelled MoS2 microspheres with outstanding photocatalytic properties have been synthesized by the hydrothermal method with the assistance of P123.

An innovative Au-CdS/ZnS-RGO architecture for efficient photocatalytic hydrogen evolution

2018 ◽  
Vol 6 (7) ◽  
pp. 2895-2899 ◽  
Author(s):  
Shuangshuang Kai ◽  
Baojuan Xi ◽  
Xiaolei Liu ◽  
Lin Ju ◽  
Peng Wang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Au Nanoparticles ◽  
One Pot ◽  
Hole Transfer ◽  
Photocatalytic Hydrogen Evolution ◽  
Semiconductor Junction ◽  
Electron Transportation

An innovative CdS/ZnS-RGO hybrid is synthesizedviaan one-pot hydrothermal method. The further introduction of Au nanoparticles enables the composite with the merits of heterostructured semiconductor/semiconductor junction benefiting the hole transfer, as well as graphene and noble metal favorable for electron transportation.

Surface co-modification with highly-dispersed Mn & Cu oxides of g-C3N4 nanosheets for efficiently photocatalytic reduction of CO2 to CO and CH4

2019 ◽  
Vol 492 ◽  
pp. 125-134 ◽  
Author(s):  
Xinxin Zhang ◽  
Kang Hu ◽  
Xuliang Zhang ◽  
Wajid Ali ◽  
Zhijun Li ◽  
...  
Keyword(s):  
Photocatalytic Reduction ◽  
Highly Dispersed ◽  
Reduction Of Co2
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