One‐Step Fabrication of 2D/2D Z‐Scheme BiOCl/g‐C 3 N 4 Nanosheets Heterojunction for Efficient Degradation of RhB and Cr(VI) Ions Reduction under Visible‐Light Illumination

2021 ◽  
Vol 6 (37) ◽  
pp. 10097-10104
Author(s):  
Hecheng Ma ◽  
Jianjun Liu ◽  
Shengli Zuo ◽  
Yingchun Yu ◽  
Wenqi Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
One Step

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

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,...

One step fabrication of novel Ag-CdS@EP floating photocatalyst for efficient degradation of organic pollutants under visible light illumination

2018 ◽  
Vol 47 (35) ◽  
pp. 12253-12263 ◽  
Author(s):  
Usman Ali Khan ◽  
Jianjun Liu ◽  
Jinbo Pan ◽  
Shengli Zuo ◽  
Hecheng Ma ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Pollutants ◽  
Ag Nanoparticles ◽  
Light Illumination ◽  
Expanded Perlite ◽  
Visible Light Illumination ◽  
One Step

In this paper, we present the fabrication of an expanded-perlite (EP)-based floating photocatalyst comprising CdS and Ag nanoparticles.

Durable visible light self-cleaning surfaces imparted by TiO2/SiO2/GO photocatalyst

2018 ◽  
Vol 89 (4) ◽  
pp. 517-527 ◽  
Author(s):  
Jing Gao ◽  
Wandi Li ◽  
Xinzhe Zhao ◽  
Lu Wang ◽  
Ning Pan
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Gentian Violet ◽  
Light Illumination ◽  
Step Method ◽  
Stain Removal ◽  
Visible Light Illumination ◽  
Visible Light Driven ◽  
One Step ◽  
Self Cleaning

This research intends to enhance the photocatalytic efficiency and durability of substrates coated with TiO2-based nanocomposites under visible light illumination. More specifically, TiO2/SiO2/graphene oxide nanocomposites are successfully sono-synthesized and sono-fabricated onto a polymeric fabric through a facile one-step method. The morphologies, phase structures and optical properties of the samples are studied. The photocatalytic activity of the functionalized samples is assessed through a gentian violet stain removal test and then photodecomposition of methylene blue under visible light, and tested again after 10 washes to check on its durability. It is corroborated that TiO2/SiO2/graphene oxide nanocomposites have shown significantly better visible light self-cleaning performance than just using the pure TiO2 alone. In addition, even after 10 washes, the samples virtually maintain the functionality. Herein, sono-synthesis of TiO2/SiO2/graphene oxide represents a remarkable step forward in visible light-driven self-cleaning treatment for flexible materials and, hence, holds a great potential for commercialization.

scholarly journals Fabrication of the heterojunction catalyst BiVO 4 /P25 and its visible-light photocatalytic activities

2018 ◽  
Vol 5 (8) ◽  
pp. 180752 ◽  
Author(s):  
Heshan Cai ◽  
Linmei Cheng ◽  
Feng Xu ◽  
Hailong Wang ◽  
Weicheng Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Contaminants ◽  
Photocatalytic Performance ◽  
Light Illumination ◽  
Xps Spectra ◽  
Visible Light Illumination ◽  
Photocatalytic Activities ◽  
Catalytic Stability ◽  
One Step ◽  
Ft Ir

A heterojunction catalyst, BiVO 4 /P25, was successfully fabricated using a one-step hydrothermal method. The prepared composite was characterized using XRD, XPS, Raman, FT-IR, UV–vis, SEM, HRTEM and PL. The HRTEM pictures revealed that the heterostructured composite was composed of BiVO 4 and P25, and from the pictures of SEM we could see the P25 nanoparticles assembling on the surface of flower-shaped BiVO 4 nanostructures. The XPS spectra showed that the prepared catalyst consisted of Bi, V, O, Ti and C. The photocatalytic activity of BiVO 4 /P25 was evaluated by degraded methyl blue (MB) and tetracycline under visible light illumination ( λ > 420 nm), and the results showed that BiVO 4 /P25 composite has a better photocatalytic performance compared with pure BiVO 4 and the most active c-BiVO 4 /P25 sample showed enough catalytic stability after three successive reuses for MB photodegradation. The enhanced photocatalytic performance could mainly be attributed to the better optical absorption ability and good absorption ability of organic contaminants.

PVP-capped CdS nanopopcorns with type-II homojunctions for highly efficient visible-light-driven organic pollutant degradation and hydrogen evolution

2018 ◽  
Vol 6 (38) ◽  
pp. 18458-18468 ◽  
Author(s):  
Na Zhao ◽  
Jing Peng ◽  
Gang Liu ◽  
Youwei Zhang ◽  
Wanying Lei ◽  
...  
Keyword(s):  
Visible Light ◽  
Gamma Ray ◽  
Organic Pollutant ◽  
Light Illumination ◽  
Type Ii ◽  
Pollutant Degradation ◽  
Organic Pollutant Degradation ◽  
Visible Light Illumination ◽  
Visible Light Driven ◽  
One Step

One-step gamma-ray radiation-derived type-II CdS homojunctions with optimal ZB–WZ phase junction distributions present enhanced photoactivity under visible-light illumination.

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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