scholarly journals A facile synthesis of Zn-doped TiO2 nanoparticles with highly exposed (001) facets for enhanced photocatalytic performance

RSC Advances ◽  
2021 ◽  
Vol 11 (13) ◽  
pp. 7627-7632
Author(s):  
Kun Jiang ◽  
Jin Zhang ◽  
Rui Luo ◽  
Yingfei Wan ◽  
Zengjian Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Light Absorption ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Absorption Capacity ◽  
Facile Synthesis ◽  
Visible Light Absorption ◽  
Doped Tio2 ◽  
Carrier Separation

It is a great challenge to simultaneously improve the visible light absorption capacity and enhance photon-generated carrier separation efficiency of photocatalysts.

Direct Z-scheme MgIn2S4/TiO2 heterojunction for enhanced photocathodic protection of metals under visible light

2022 ◽  
Author(s):  
Hong Li ◽  
Xingqiang Cui ◽  
Weizhe Song ◽  
Zhanyuan Yang ◽  
Yanhui Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Separation Efficiency ◽  
Photogenerated Electron ◽  
Precursor Solution ◽  
Absorption Capacity ◽  
Photoelectric Conversion ◽  
Visible Light Absorption ◽  
Photocathodic Protection ◽  
Protection Of Metals

Abstract To improve the photocathodic protection performance of traditional TiO2 photoanodes for metals, constructing a Z-scheme heterojunction is one of the most promising and creative strategies. Herein, we fabricated a novel Z-scheme MgIn2S4 nanosheets/TiO2 nanotube nanocomposite through anodization and hydrothermal method. The optimized Z-scheme MgIn2S4/TiO2 nanocomposites exhibited stronger visible light absorption, higher separation efficiency of photoelectrons and photocathodic protection performances in comparison to pure TiO2. The theoretical analysis and experimental results show that the Z-scheme heterojunction and oxygen vacancies jointly improved the separation efficiency of photogenerated electron-hole pairs and visible light absorption capacity, thereby improving the photoelectric conversion performance of the MgIn2S4/TiO2 nanocomposites. Furthermore, the influence of the precursor solution concentration on the photocathodic protection performances of the composites was investigated. As a result, when the concentration of magnesium source in the precursor solution was 0.06 mmol, the prepared MgIn2S4/TiO2-0.06 displayed the best photocathodic protection performance. In addition, the hydroxyl radicals (•OH) generated in the electron spin resonance (ESR) experiment verified the Z-scheme heterojunction mechanism of the MgIn2S4/TiO2 composite, and also demonstrated the excellent redox performance of the composite. This work provides valuable reference for the construction of high-performance Z-scheme heterojunctions for photocathode protection of metals.

Designed Ag-decorated Mn:ZnO nanocomposite: facile synthesis, and enhanced visible light absorption and photogenerated carrier separation

2020 ◽  
Vol 22 (46) ◽  
pp. 27272-27279
Author(s):  
Jing Li ◽  
Huan Yuan ◽  
Qiuping Zhang ◽  
Kaiyi Luo ◽  
Yutong Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Polymer Network ◽  
Photogenerated Carrier ◽  
Facile Synthesis ◽  
Visible Light Absorption ◽  
Complex Architectures ◽  
Doped Zno ◽  
Carrier Separation ◽  
Mn Doped

A series of ZnO-based complex architectures including Mn-doped ZnO, Ag/ZnO and Ag-decorated Mn:ZnO nanocomposites were fabricated by a facile polymer network gel method.

Site-Dependent Photoinduced Charge Carrier Dynamics in Nitrogen/Fluorine Doped TiO2 Nanoparticles

2021 ◽  
Author(s):  
Yeonsig Nam ◽  
Hao Li ◽  
Jin Yong Lee
Keyword(s):  
Charge Carrier ◽  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Light Absorption ◽  
Carrier Dynamics ◽  
Fluorine Doping ◽  
Visible Light Absorption ◽  
Doped Tio2 ◽  
Charge Carrier Dynamics ◽  
Photoinduced Charge

Nitrogen/fluorine doping of TiO2 nanoparticles (NPs) serves to play an important role with regard to visible light absorption and charge carrier dynamics. However, it is largely unknown how nitrogen/fluorine doping...

scholarly journals Surfactant-assisted microwave processing of ZnO particles: a simple way for designing the surface-to-bulk defect ratio and improving photo(electro)catalytic properties

RSC Advances ◽  
2019 ◽  
Vol 9 (30) ◽  
pp. 17165-17178 ◽  
Author(s):  
Smilja Marković ◽  
Ivana Stojković Simatović ◽  
Sanita Ahmetović ◽  
Ljiljana Veselinović ◽  
Stevan Stojadinović ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Microwave Synthesis ◽  
Light Absorption ◽  
Catalytic Properties ◽  
Absorption Capacity ◽  
Visible Light Absorption ◽  
Zno Particles ◽  
Electro Catalytic Activity ◽  
Surfactant Assisted

Employing CTAB in the microwave synthesis of ZnO particles enables improvement of their visible light absorption capacity and photo(electro)catalytic activity.

scholarly journals Improving the photocatalytic activity of nitrogen-doped surface defect TiO2-x nanobelts for degradation of organic pollutants

2020 ◽  
pp. 174751982093867
Author(s):  
Zhen Zhang ◽  
Shao-dong Qin ◽  
Jing-yun Chen ◽  
Jing Li ◽  
Ai-hua Xing
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Pollutants ◽  
Rhodamine B ◽  
Light Absorption ◽  
Surface Defect ◽  
Separation Efficiency ◽  
Visible Light Absorption ◽  
Nitrogen Doped ◽  
N Doping

The synthesis of surface defect TiO2-x nanobelts with excellent visible light absorption is important to reduce costs, increase stability, and improve photocatalytic activity. In this work, we report that nitrogen-doped surface defect TiO2-x nanobelts are synthesized by annealing pristine TiO2 nanobelts in Ar/H2 (95%/5%) atmosphere followed by subsequent heat treatment in NH3 at various temperatures. The aim is to study the effect of the extent of the N-doping amount in the lattice of TiO2-x nanobelts on light absorption and photocatalytic activity. Considering the increase in organic pollutants in wastewater, the photocatalytic activity is measured by degrading rhodamine B (RhB) dye in water. The results demonstrate that the calcination temperature affects the doping level of N, and the b-TiO2-N550 sample exhibits higher photocatalytic performance than that of other samples under visible-light irradiation for the degradation of rhodamine B, which is up to 96.11%. The enhancement is ascribed to the synergistic effect of N-doping and self-doping oxygen vacancy (which extend the visible light absorption) and the separation efficiency of photogenerated carriers, which improves the photocatalytic activity.

Origin of significant visible-light absorption properties of Mn-doped TiO2 thin films

2012 ◽  
Vol 60 (5) ◽  
pp. 1974-1985 ◽  
Author(s):  
X.H. Xia ◽  
L. Lu ◽  
A.S. Walton ◽  
M. Ward ◽  
X.P. Han ◽  
...  
Keyword(s):  
Thin Films ◽  
Visible Light ◽  
Light Absorption ◽  
Tio2 Thin Films ◽  
Absorption Properties ◽  
Visible Light Absorption ◽  
Doped Tio2 ◽  
Mn Doped

scholarly journals Facile Synthesis Bi2Te3 Based Nanocomposites: Strategies for Enhancing Charge Carrier Separation to Improve Photocatalytic Activity

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3390
Author(s):  
Di Wu ◽  
Jun Guo ◽  
Zhen-Hua Ge ◽  
Jing Feng
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Charge Carriers ◽  
Core Shell ◽  
Facile Synthesis ◽  
Shell Nanostructures ◽  
Carrier Separation ◽  
The Stability ◽  
Nanocomposite Powders ◽  
Decomposition Efficiency

Varying structure Bi2Te3-based nanocomposite powders including pure Bi2Te3, Bi2Te3/Bi core−shell, and Bi2Te3/AgBiTe2 heterostructure were synthesized by hydrothermal synthesis using Bi2S3 as the template and hydrazine as the reductant. Successful realization of Bi2Te3-based nanostructures were concluded from XRD, FESEM, and TEM. In this work, the improvement in the performance of the rhodamine B (RhB) decomposition efficiency under visible light was discussed. The Bi2Te3/AgBiTe2 heterostructures revealed propitious photocatalytic performance ca. 90% after 60 min. The performance was over Bi2Te3/Bi core-shell nanostructures (ca. 40%) and more, exceeding pure Bi2Te3 (ca. 5%). The reason could be scrutinized in terms of the heterojunction structure, improving the interfacial contact between Bi2Te3 and AgBiTe2 and enabling retardation in the recombination rate of the photogenerated charge carriers. A credible mechanism of the charge transfer process in the Bi2Te3/AgBiTe2 heterostructures for the decomposition of an aqueous solution of RhB was also explicated. In addition, this work also investigated the stability and recyclability of a Bi2Te3/AgBiTe2 heterojunction nanostructure photocatalyst. In addition, this paper anticipates that the results possess broad potential in the photocatalysis field for the design of a visible light functional and reusable heterojunction nanostructure photocatalyst.

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