scholarly journals Solar hydrogen generation over CdS incorporated in Ti-MCM-48 mesoporous materials under visible light illumination

2016 ◽  
Vol 41 (7) ◽  
pp. 4106-4119 ◽  
Author(s):  
Rui Peng ◽  
Chia-Ming Wu ◽  
Jonas Baltrusaitis ◽  
Nada M. Dimitrijevic ◽  
Tijana Rajh ◽  
...  
Keyword(s):  
Visible Light ◽  
Mesoporous Materials ◽  
Hydrogen Generation ◽  
Light Illumination ◽  
Solar Hydrogen ◽  
Visible Light Illumination

Optimization of the experimental conditions of hydrogen production by the Pt–(CdS/ZnS) system under visible light illumination

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 36681-36688 ◽  
Author(s):  
Katherine Villa ◽  
Xavier Domènech ◽  
Ulises M. García-Pérez ◽  
José Peral
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Visible Light ◽  
Hydrogen Generation ◽  
Light Illumination ◽  
Experimental Conditions ◽  
Visible Light Illumination

The photocatalytic activity of a Pt–(CdS/ZnS) system towards hydrogen generation from water and in presence of a sacrificial organic is studied.

Extended visible light driven photocatalytic hydrogen generation by electron induction from g-C3N4 nanosheets to ZnO through the proper heterojunction

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Amir Zada ◽  
Muhammad Khan ◽  
Zahid Hussain ◽  
Muhammad Ishaq Ali Shah ◽  
Muhammad Ateeq ◽  
...  
Keyword(s):  
Visible Light ◽  
Energy Production ◽  
Hydrogen Generation ◽  
Low Cost ◽  
Hydrogen Gas ◽  
Light Illumination ◽  
Photocatalytic Hydrogen Generation ◽  
Visible Light Illumination ◽  
Visible Light Driven ◽  
Radical Generation

Abstract The alarming energy crises has forced the scientific community to work for sustainable energy modules to meet energy requirements. As for this, ZnO/g-C3N4 nanocomposites with proper heterojunction were fabricated by coupling a proper amount of ZnO with 2D graphitic carbon nitride (g-C3N4) nanosheets and the obtained nanocomposites were applied for photocatalytic hydrogen generation from water under visible light illumination (λ > 420 nm). The morphologies and the hydrogen generation performance of fabricated photocatalysts were characterized in detail. Results showed that the optimized 5ZnO/g-C3N4 nanocomposite produced 70 µmol hydrogen gas in 1 h compare to 8 µmol by pure g-C3N4 under identical illumination conditions in the presence of methanol without the addition of cocatalyst. The much improved photoactivities of the nanocomposites were attributed to the enhanced charge separation through the heterojunction as confirmed from photoluminescence study, capacity of the fabricated samples for •OH radical generation and steady state surface photovoltage spectroscopic (SS-SPS) measurements. We believe that this work would help to fabricate low cost and effective visible light driven photocatalyst for energy production.

Photoelectrocatalytic Oxidation of Organics Under Visible Light Illumination: A Short Review

2015 ◽  
Vol 19 (6) ◽  
pp. 512-520 ◽  
Author(s):  
Nikolaos Karanasios ◽  
Jenia Georgieva ◽  
Eugenia Valova ◽  
Stephan Armyanov ◽  
Georgios Litsardakis ◽  
...  
Keyword(s):  
Visible Light ◽  
Short Review ◽  
Light Illumination ◽  
Photoelectrocatalytic Oxidation ◽  
Visible Light Illumination ◽  
Oxidation Of Organics

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.

scholarly journals Hybrid ZnO/MoS2 Core/Sheath Heterostructures for Photoelectrochemical Water Splitting

Applied Nano ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 148-161
Author(s):  
Katerina Govatsi ◽  
Aspasia Antonelou ◽  
Labrini Sygellou ◽  
Stylianos G. Neophytides ◽  
Spyros N. Yannopoulos
Keyword(s):  
Visible Light ◽  
Wide Band ◽  
Nanowire Arrays ◽  
Maximum Efficiency ◽  
Light Illumination ◽  
Wide Band Gap ◽  
Long Term Stability ◽  
Visible Light Illumination ◽  
Nanowire Surface ◽  
Wide Range

The rational synthesis of semiconducting materials with enhanced photoelectrocatalytic efficiency under visible light illumination is a long-standing issue. ZnO has been systematically explored in this field, as it offers the feasibility to grow a wide range of nanocrystal morphology; however, its wide band gap precludes visible light absorption. We report on a novel method for the controlled growth of semiconductor heterostructures and, in particular, core/sheath ZnO/MoS2 nanowire arrays and the evaluation of their photoelectrochemical efficiency in oxygen evolution reaction. ZnO nanowire arrays, with a narrow distribution of nanowire diameters, were grown on FTO substrates by chemical bath deposition. Layers of Mo metal at various thicknesses were sputtered on the nanowire surface, and the Mo layers were sulfurized at low temperature, providing in a controlled way few layers of MoS2, in the range from one to three monolayers. The heterostructures were characterized by electron microscopy (SEM, TEM) and spectroscopy (XPS, Raman, PL). The photoelectrochemical properties of the heterostructures were found to depend on the thickness of the pre-deposited Mo film, exhibiting maximum efficiency for moderate values of Mo film thickness. Long-term stability, in relation to similar heterostructures in the literature, has been observed.

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