Ternary CdS-MoS2 coated ZnO nanobrush photoelectrode for one-dimensional acceleration of charge separation upon visible light illumination

La/Zr co-doping preserves visible light absorption of SrTaO2N, prohibits the formation of defects, improves surface hydrophilicity and charge separation conditions, all of which contribute to an enhanced photocatalytic activity for water reduction.

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Enhanced Ciprofloxacin Degradation Over Pt@BaZrO3/g-C3N4 Heterojunctions Beneath Visible Light Illumination

Nanoscience and Nanotechnology Letters ◽

10.1166/nnl.2020.3190 ◽

2020 ◽

Vol 12 (7) ◽

pp. 874-884

Author(s):

Maha Alhaddad

Keyword(s):

Visible Light ◽

Charge Separation ◽

Photocatalytic Performance ◽

Charge Carriers ◽

Superior Performance ◽

Photocatalytic Decomposition ◽

Light Illumination ◽

Great Ability ◽

Visible Light Illumination ◽

Essential Parameter

In this investigation, various proportions of Pt@BaZrO3 (at 1∼4 wt.%) accommodating 2.0 wt% Pt were adopted to establish Pt@BaZrO3/g-C3N4 nanocomposites of improved photocatalytic performance. H2PtCl6 nanoparticles as well as mesoporous BaZrO3 and g-C3N4 were utilized to develop the prescribed nanocomposites via sonication-mixture routine. The photocatalytic achievement for the upgraded Pt@BaZrO3/g-C3N4 nanocomposites beneath visible light irradiation were tested by examining ciprofloxacin (CIP) degradation. Enhanced charge transfer and retarded charges’ recombination were established amid Pt, BaZrO3 NPs and g-C3N4 nanosheets in the developed heterojunctions. The proportion (wt.%) of Pt@BaZrO3 was found to be an essential parameter in governing the photocatalytic efficacy of the promoted Pt@BaZrO3/g-C3N4 nanocomposites. Moreover, complete photocatalytic decomposition of CIP was established over Pt@BaZrO3/g-C3N4 nanocomposite, accommodating 3 wt.% Pt@BaZrO3 NPs. Such superior performance was correlated to the great ability of the Pt@BaZrO3/g-C3N4 to absorb visible light in addition to the prolonged charge separation amid the photo-induced charge carriers.

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High-Performance 3D Semiconductor-Based Heterostructure Photocatalyst in Sustained Control of Harmful Gas-Phase Pollutants Under Visible-Light Illumination

10.21203/rs.3.rs-1123468/v1 ◽

2021 ◽

Author(s):

Dong-Eun Lee ◽

Mi Hyang Bae ◽

Wan Jo

Keyword(s):

Visible Light ◽

Gas Phase ◽

Charge Separation ◽

High Performance ◽

Three Dimensional ◽

Reaction Chamber ◽

Light Illumination ◽

Highly Efficient ◽

Visible Light Illumination ◽

Catalyst Powder

Abstract Herein, a highly efficient three-dimensional (3D) semiconductor-based heterostructure photocatalyst (i.e., WO3–g-C3N4 monolithic architecture; WOCNM) was developed by immobilizing a WO3–g-C3N4 heterostructure powder on a melamine foam (MF) framework. Subsequently, the sustained control of two harmful model gas-phase pollutants (i.e., n-butanol and o-xylene) over WOCNM and selected monolithic counterparts (i.e., MF-supported WO3 monolith and MF-supported g-C3N4 monolith) was investigated under visible-light irradiation. WOCNM exhibited higher photocatalytic capabilities in the sustained control of the two model pollutants than those of individual WO3 and g-C3N4 monoliths because the WO3–g-C3N4 heterojunction enhanced its charge-separation ability. Notably, WOCNM exhibited highly efficient photocatalytic capabilities in the sustained control of n-butanol (up to 97%) and o-xylene (up to 86%). Moreover, no noticeable changes were observed in the WOCNM photocatalytic capability after the final run of successive applications. The fresh and successively used WOCNMs were nearly identical, and the photocatalyst powder was not observed in the reaction chamber after its successive application. As a result, WOCNM was a highly efficient and stable 3D heterostructure photocatalyst for the sustained control of gas-phase n-butanol and o-xylene, without significant catalyst powder loss. Promisingly, this study will expedite the future development of 3D photocatalysts for the sustained control of harmful gas-phase pollutants.

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Direct imaging of visible-light-induced one-step charge separation at the chromium(III) oxide–strontium titanate interface

Journal of Materials Chemistry A ◽

10.1039/d1ta08950a ◽

2021 ◽

Author(s):

Aufandra Cakra Wardhana ◽

Sou Yasuhara ◽

Min Wen Yu ◽

Akira Yamaguchi ◽

Tadaaki Nagao ◽

...

Keyword(s):

Transition Metal ◽

Visible Light ◽

Strontium Titanate ◽

Charge Separation ◽

Light Illumination ◽

Practical Applications ◽

Visible Light Illumination ◽

Visible Light Active ◽

One Step ◽

Photocatalytic Reactions

Efficient visible-light-active photocatalysts are of great interest for practical applications. First-row transition metal oxide nanoclusters have been loaded onto ultraviolet (UV)-driven semiconductors for several photocatalytic reactions under visible-light illumination. However,...

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Efficient visible-light photocatalytic heterojunctions formed by coupling plasmonic Cu2−xSe and graphitic carbon nitride

New Journal of Chemistry ◽

10.1039/c5nj01010a ◽

2015 ◽

Vol 39 (8) ◽

pp. 6186-6192 ◽

Cited By ~ 17

Author(s):

Jing Han ◽

Hong Yan Zou ◽

Ze Xi Liu ◽

Tong Yang ◽

Ming Xuan Gao ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Charge Separation ◽

Carbon Nitride ◽

Light Harvesting ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Light Illumination ◽

Visible Light Illumination ◽

Visible Light Photocatalytic

Heterojunctions formed by plasmonic Cu2−xSe nanocrystals and graphitic carbon nitride (g-C3N4) can improve the solar-light harvesting and charge separation/transfer with efficient photocatalytic activity under visible light illumination.

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

Current Organic Chemistry ◽

10.2174/1385272819666150115000247 ◽

2015 ◽

Vol 19 (6) ◽

pp. 512-520 ◽

Cited By ~ 6

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

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

Materials ◽

10.3390/ma12233948 ◽

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

Applied Nano ◽

10.3390/applnano2030012 ◽

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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