Formation of Mo2C/hollow tubular g-C3N4 hybrids with favorable charge transfer channels for excellent visible-light-photocatalytic performance

2020 ◽  
Vol 527 ◽  
pp. 146757 ◽  
Author(s):  
Chen Zhang ◽  
Yin Zhou ◽  
Wenjun Wang ◽  
Yang Yang ◽  
Chengyun Zhou ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Transfer Channels ◽  
Visible Light Photocatalytic

Engineering the Z-system hybrids of 0D/2D F-TiO2 quantum dots/g-C3N4 heterostructure through chemical bonds with enhanced visible-light photocatalytic performance

2021 ◽  
Author(s):  
Jian Wang ◽  
wei lin ◽  
Hao Hu ◽  
Chunxia Liu ◽  
Qiong Cai ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Charge Transfer ◽  
Visible Light ◽  
Effective Charge ◽  
Photocatalytic Performance ◽  
Chemical Bonds ◽  
Promising Strategy ◽  
Interfacial Charge ◽  
Visible Light Photocatalytic ◽  
Effective Charge Transfer

Constructing a direct Z-Scheme system for the photocatalysts is a promising strategy to enhance photocatalytic redox performance owing to its effective charge transfer; however, building a reasonable interfacial charge transfer...

Construction of g-C3N4-BiOBrxI1-x Nanocomposites with Tunable Energy Band Structure for Enhanced Visible Light Photocatalytic CO2 Reduction

2020 ◽  
Vol 20 (10) ◽  
pp. 6450-6457
Author(s):  
Hao Yong Yin ◽  
Yi Fan Zheng ◽  
Xu Chun Song
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
High Efficiency ◽  
Co2 Reduction ◽  
Energy Band Structure ◽  
Electron Hole ◽  
Band Structures ◽  
Solvothermal Methods ◽  
Visible Light Photocatalytic

The g-C3N4-BiOBrxI1-x nanocomposites were successfully prepared using solvothermal methods. The obtained g-C3N4-BiOBrxI1-x composites had tunable band structures and displayed preferable photocatalytic performance for CO2 reduction irradiated by visible light. Moreover, comparing to pure g-C3N4 and corresponding BiOBrxI1-x, all the obtained g-C3N4-BiOBrxI1-x nanocomposites exhibited distinctly higher activity for CO2 reduction, with 5% g-C3N4-BiOBr0.25I0.75 nanocomposites displaying the best photocatalytic performance. Enhanced photocatalytic performance of g-C3N4-BiOBrxI1-x nanocomposites may arrive from their advantages of high efficiency of electron-hole separation, tunable band structures, and rapid charge transfer. Moreover, a possible visible light induced photocatalytic mechanism on g-C3N4-BiOBrxI1-x nanocomposites was further proposed.

scholarly journals Construction of Ag3PO4/SnO2 Heterojunction on Carbon Cloth with Enhanced Visible Light Photocatalytic Degradation

2020 ◽  
Vol 10 (9) ◽  
pp. 3238
Author(s):  
Min Liu ◽  
Guangxin Wang ◽  
Panpan Xu ◽  
Yanfeng Zhu ◽  
Wuhui Li
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Photogenerated Electron ◽  
Carbon Cloth ◽  
Electron Hole ◽  
Step Process ◽  
Photogenerated Electrons ◽  
Rapid Transfer ◽  
Visible Light Photocatalytic

In this study, the Ag3PO4/SnO2 heterojunction on carbon cloth (Ag3PO4/SnO2/CC) was successfully fabricated via a facile two-step process. The results showed that the Ag3PO4/SnO2/CC heterojunction exhibited a remarkable photocatalytic performance for the degradation of Rhodamine B (RhB) and methylene blue (MB), under visible light irradiation. The calculated k values for the degradation of RhB and MB over Ag3PO4/SnO2/CC are 0.04716 min−1 and 0.04916 min−1, which are higher than those calculated for the reactions over Ag3PO4/SnO2, Ag3PO4/CC and SnO2/CC, respectively. The enhanced photocatalytic activity could mainly be attributed to the improved separation efficiency of photogenerated electron-hole pairs, after the formation of the Ag3PO4/SnO2/CC heterojunction. Moreover, carbon cloth with a large specific surface area and excellent conductivity was used as the substrate, which helped to increase the contact area of dye solution with photocatalysts and the rapid transfer of photogenerated electrons. Notably, when compared with the powder catalyst, the catalysts supported on carbon cloth are easier to quickly recycle from the pollutant solution, thereby reducing the probability of recontamination.

scholarly journals Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3948
Author(s):  
Lingfang Qiu ◽  
Zhiwei Zhou ◽  
Mengfan Ma ◽  
Ping Li ◽  
Jinyong Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Thermal Polymerization ◽  
Light Illumination ◽  
Electron Hole ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

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