scholarly journals Efficient Photocatalytic Degradation of RhB by Constructing Sn3O4 Nanoflakes on Sulfur-Doped NaTaO3 Nanocubes

Crystals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 59
Author(s):  
Sujie Chang ◽  
Yuanhua Sang ◽  
Hong Liu
Keyword(s):  
Band Structure ◽  
Photocatalytic Degradation ◽  
Charge Separation ◽  
High Efficiency ◽  
Hydrothermal Process ◽  
Photocatalytic Property ◽  
Light Response ◽  
Practical Application ◽  
Structure Engineering ◽  
Simple Hydrothermal Process

Band structure engineering and heterojunction photocatalyst construction are efficient approaches to improve the separation of photo-induced electrons and holes, along with enhancing light response ability. By sulfur doping, sodium tantalite (NaTaO3) showed an improved photocatalytic property for the degradation of Rhodamine B (RhB). Sn3O4 nanoflakes were constructed on the surface of NaTaO3 nanocubes, forming a surface heterostructure via a simple hydrothermal process, initially. This heterostructure endows the photocatalyst with an enhanced charge separation rate, resulting in an improved photocatalytic degradation of RhB. Moreover, a possible mechanism over Sn3O4/NaTaO3 and the photodegradation pathway of RhB were proposed as the combined effect of photo-induced electrons and holes. This facile process for band structure engineering and heterostructure construction provides the possibility for the practical application of high-efficiency photocatalysts.

Efficient band structure tuning, charge separation, and visible-light response in ZrS2-based van der Waals heterostructures

2016 ◽  
Vol 9 (3) ◽  
pp. 841-849 ◽  
Author(s):  
Xirui Zhang ◽  
Zhaoshun Meng ◽  
Dewei Rao ◽  
Yunhui Wang ◽  
Qi Shi ◽  
...  
Keyword(s):  
Band Structure ◽  
Visible Light ◽  
Water Splitting ◽  
Charge Separation ◽  
Van Der Waals ◽  
Light Response ◽  
Van Der Waals Heterostructures ◽  
Visible Light Response

Bilayer ZrS2-based vdW heterostructures are proposed as efficient photocatalysts for water splitting under visible light.

One-Step Hydrothermal Synthesis of 1T@2H MoS2 for Enhanced Photocatalytic Degradation Performance of Methyl Blue

2020 ◽  
Vol 993 ◽  
pp. 1496-1501
Author(s):  
Dong Dong Li ◽  
Yan Hua Lei ◽  
Ning Tan ◽  
Tao Liu ◽  
Xue Ting Chang ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
High Efficiency ◽  
Removal Rate ◽  
Photocatalytic Property ◽  
Band Gap Energy ◽  
Photo Degradation ◽  
One Step ◽  
Electron Migration ◽  
Materials Used

Photocatalytic technology is widely used in water purification because of its environmental protection, high efficiency and energy saving. Therefore, it is extremely important for the selection and preparation of specific semiconductor materials used in the field of photocatalysis. In this work, 1T@2H MoS2 nanosheets were fabricated by simple hydrothermal method, and the photocatalytic property of as-prepared 1T@2H MoS2 were investigated by the photo-degradation of methylene blue (MB) water solutions under visible light irradiation via 2H MoS2.The results indicated that compared to 2H MoS2, the 1T@2H MoS2 exhibited more excellent photocatalytic degradation property. After 150 minutes of irradiation under visible light, 1T@2H MoS2 had a removal rate of 98% for MB, and 2H MoS2 eventually reached 19%. The enhancement photocatalytic property of 1T@2H MoS2 could be attributed to the reduced band gap energy of the hybrid-nanosheets and the increased in electron migration speed.

scholarly journals Facile Construction of Sandwich-like TiO2-ZnO-ED-HPV Composite for Photodegradation of Ciprofloxacin

2019 ◽  
Vol 8 (4S2) ◽  
pp. 512-516
Keyword(s):  
Metal Oxide ◽  
Ir Spectra ◽  
Photocatalytic Degradation ◽  
Band Gap ◽  
Heteropoly Acid ◽  
Uv Light ◽  
Hydrothermal Process ◽  
Main Role ◽  
Ft Ir ◽  
Simple Hydrothermal Process

The TiO2-ZnO, TiO2-ZnO-ED and TiO2-ZnO-ED-HPV (TZEDHPV) nanocomposite were successfully prepared by simple hydrothermal process The nanocomposite was characterized and conformed by DRS-UV, FT-IR, XRD, SED and EDX analsis. The DRS-UV analysis of TZEDHPV nanocomposite absorption was increased with the band gap decrease of TiO2-ZnO by the addition of heteropoly acid (HPV). The FT-IR spectra of photocatalyst, presents the characteristic bands of metal oxide, ED and HPV. SEM and EDX analysis reveals clustered microsponge-like structure of catalyst with more number of cavities. Photodegradation of ciprofloxacin (CF conc.: 40 µM), exhibited 98.20 % removal efficiency under UV light. According to the scavenger method results, O2•- radical played a main role in the photocatalytic degradation.

Band structure engineering of boron–oxygen-based materials for efficient charge separation

2019 ◽  
Vol 3 (7) ◽  
pp. 1440-1448
Author(s):  
Xiaoyun Fan ◽  
Kangdi Zhong ◽  
Yang Zhang ◽  
Jiao Yin ◽  
Yufei Zhai
Keyword(s):  
Band Structure ◽  
Charge Separation ◽  
Hole Pair ◽  
Band Gaps ◽  
Electron Hole ◽  
Pair Separation ◽  
Efficient Charge ◽  
Electron Hole Pair ◽  
Direct Band ◽  
Structure Engineering

The boron-based materials with indirect–direct band gaps can enhance the photo-generated electron–hole pair separation.

scholarly journals The Main Progress of Perovskite Solar Cells in 2020–2021

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Tianhao Wu ◽  
Zhenzhen Qin ◽  
Yanbo Wang ◽  
Yongzhen Wu ◽  
Wei Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Lead Free ◽  
Manufacturing Cost ◽  
Practical Application ◽  
The World ◽  
Photovoltaic Technology

AbstractPerovskite solar cells (PSCs) emerging as a promising photovoltaic technology with high efficiency and low manufacturing cost have attracted the attention from all over the world. Both the efficiency and stability of PSCs have increased steadily in recent years, and the research on reducing lead leakage and developing eco-friendly lead-free perovskites pushes forward the commercialization of PSCs step by step. This review summarizes the main progress of PSCs in 2020 and 2021 from the aspects of efficiency, stability, perovskite-based tandem devices, and lead-free PSCs. Moreover, a brief discussion on the development of PSC modules and its challenges toward practical application is provided.

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