A series of POM compounds constructed by a flexible ligand containing three coordination groups: electrocatalytic, photocatalytic reduction and amperometric detection of Cr(VI)

2022 ◽  
Author(s):  
Chenxi Sun ◽  
Yanping Zhang ◽  
Jun Ying ◽  
Liang Jin ◽  
Aixiang Tian ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Amperometric Detection ◽  
Photocatalytic Reduction ◽  
Flexible Ligand

Four polyoxometalate-based compounds were synthesized by hydrothermal method, namely [Ni2(HPtpi)(H2O)7.5Mo0.17(TeMo6O24)]·2.5H2O (1)，[Co(HPtpi)2(H2Ptpi)2(GeMo12O40)2]·4H2O (2) and {[M(Ptpi)(H2Ptpi)(H2O)][(γ-Mo8O26)0.5(α-Mo8O26)0.5]}·4H2O (M = Co in 3; Ni in 4) (Ptpi = 1-[2-(3-Pyridin-4-yl-[1,2,4]triazol-4-yl)-propyl]-imidazol). Compound 1 exhibits a 3D...

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.

Hollow and mesoporous ZnTe microspheres: synthesis and visible-light photocatalytic reduction of carbon dioxide into methane

RSC Advances ◽  
2015 ◽  
Vol 5 (8) ◽  
pp. 6186-6194 ◽  
Author(s):  
Muhammad Fahad Ehsan ◽  
Muhammad Naeem Ashiq ◽  
Tao He
Keyword(s):  
Carbon Dioxide ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Formation Mechanism ◽  
Photocatalytic Reduction ◽  
Visible Light Photocatalytic

The morphology of hollow and mesoporous ZnTe microspheres synthesized via a hydrothermal method has been controlled and the detailed formation mechanism has been investigated. These microspheres have used for the photoreduction of CO2 into CH4.

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.

Controlling the shape of anatase nanocrystals for enhanced photocatalytic reduction of CO2 to methanol

2017 ◽  
Vol 41 (13) ◽  
pp. 5660-5668 ◽  
Author(s):  
Quang Duc Truong ◽  
Huu Thu Hoa ◽  
Dai-Viet N. Vo ◽  
Thanh Son Le
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
Photocatalytic Reduction ◽  
Facile Hydrothermal Method ◽  
Anatase Titania ◽  
Reduction Of Co2

Anatase titania with tunable shapes has been synthesized by a facile hydrothermal method using peroxotitanic acid as a precursor. The results of investigations showed that the photocatalytic activity in the reduction of CO2 to methanol increased with an increase in the percentage of {001} surfaces.

Photocatalytic reduction of NO with NH3 using Si-doped TiO2 prepared by hydrothermal method

2009 ◽  
Vol 161 (1) ◽  
pp. 42-48 ◽  
Author(s):  
Ruiben Jin ◽  
Zhongbiao Wu ◽  
Yue Liu ◽  
Boqiong Jiang ◽  
Haiqiang Wang
Keyword(s):  
Hydrothermal Method ◽  
Photocatalytic Reduction ◽  
Reduction Of No ◽  
Doped Tio2 ◽  
Si Doped ◽  
Photocatalytic Reduction Of No

Ru(II) Polypyridyl Complexes-Sensitized TiO2Nanotubes for Photoreduction of CO2Aqueous Solution

NANO ◽  
2016 ◽  
Vol 11 (12) ◽  
pp. 1650134 ◽  
Author(s):  
Yan Nie ◽  
Chen Wang ◽  
Jun Li ◽  
Xiao-Xun Ma
Keyword(s):  
Titanium Dioxide ◽  
Liquid Phase ◽  
Hydrothermal Method ◽  
Anatase Phase ◽  
Photocatalytic Reduction ◽  
Polypyridyl Complexes ◽  
Aqueous Suspensions ◽  
Closed Systems

Ruthenium (II) polypyridyl complexes modified titanium dioxide materials with anatase phase, the length of 10–100[Formula: see text]nm, were synthesized by a hydrothermal method. Photocatalytic CO2reduction experiments were performed in sensitized TiO2aqueous suspensions under UV–Vis light in closed systems. And only methanol was detected in the liquid phase under the experiment condition. The effect of different photosensitizers content on the photoactivity of TiO2was also studied, showing that Ru(BiDiPy)2(NCS)2sensitized TiO2was the optimal photocatalyst in transformation of CO2to methanol. A possible mechanism for the photocatalytic reduction was also proposed in this paper.

scholarly journals Synthesis of some Bismuth Sulfide nano/micro-structures and reduction catalytic of Cr(VI) under visible light irradiation

2020 ◽  
Vol 9 (4) ◽  
pp. 83-87
Author(s):  
Thu Do Thi Anh ◽  
Ha Vu Thi Thai ◽  
Ngan Pham Quang ◽  
Thai Giang Hong ◽  
Hieu Nguyen Trung ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrothermal Method ◽  
Visible Light Irradiation ◽  
Crucial Role ◽  
Photocatalytic Reduction ◽  
Light Irradiation ◽  
Sulfur Source ◽  
Bismuth Sulfide ◽  
Facile Hydrothermal Method ◽  
Micro Structures

Bismuth sulfide (Bi2S3) nanostructures with various morphologies, including nanowires, nanorods and nanoflowers, have been successfully fabricated via a facile hydrothermal method. The results show that the sulfur source plays a crucial role in determining the product morphology. Photocatalysis experiments show Bi2S3 nanowires exhibit the highest photocatalytic reduction of Cr(VI) when exposed to visible light irradiation.

Synthesis of magnesium and carbonate co-substituted fluoroapatites by hydrothermal method

2011 ◽  
Vol 36 (4-5-6) ◽  
pp. 205-216 ◽  
Author(s):  
Ezzedine Ben Salem ◽  
Samir Nasr ◽  
Etienne Gaudin ◽  
Khaled Bouzouita
Keyword(s):  
Hydrothermal Method
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