Z-scheme Mesoporous CdIn2S4 /g-C3N4 heterojunction for enlarged photocatalytic efficiency utilizing visible-light illumination

Hollow Cu2O microspheres with {110} and {111} facets, demonstrating preferential selective adsorption and enhanced photodegradation for MO, have been prepared and used to exactly evaluate the photocatalytic efficiency of our Cu2O microspheres under visible light illumination.

Download Full-text

Comparison Between Ag@TiO2 Core-Shell and Yolk-Shell Structures for Degradation of Gaseous Toluene Beneath Visible Light

Nanoscience and Nanotechnology Letters ◽

10.1166/nnl.2019.3012 ◽

2019 ◽

Vol 11 (9) ◽

pp. 1226-1238

Author(s):

Reda M. Mohamed ◽

Detlef W. Bahnemann ◽

Amal S. Basaleh ◽

Razan H. Gadah

Keyword(s):

Visible Light ◽

Specific Area ◽

Shell Structures ◽

Core Shell ◽

Light Illumination ◽

Photocatalytic Efficiency ◽

Cavity Volume ◽

Visible Light Illumination ◽

Photo Catalytic Oxidation ◽

Gaseous Toluene

In this study, Ag@TiO2-YS and Ag@TiO2-CS were effectively prepared, and the differences in their morphologies were investigated. The photo-catalytic efficacy of gaseous toluene was determined by investigating its photo-catalytic oxidation beneath the visible light illumination. The results indicate that Ag@TiO2-YS has a high photocatalytic stability and superior photocatalytic properties. A 0.10 at% Ag@TiO2-YS photocatalyst can degrade approximately 99.5% of the gaseous toluene within 2 h. In addition, a 0.10 at% Ag@TiO2-YS photocatalyst can be utilized during many intervals without a failure of the photocatalytic efficiency or the occurrence of corrosion. The high photocatalytic efficiency of Ag@TiO2-YS can be attributed to the highly mesoporous texture and large specific area, the huge cavity volume of the yolk-shell arrangement, and finally the presence of Ti3+. The major effective ions and species in the destruction of gaseous toluene using visible light illumination applying a Ag@TiO2 yolk-shell, as confirmed through ESR, are Ti3+, h+, O-2, and OH.

Download Full-text

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

Download Full-text

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.

Download Full-text

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.

Download Full-text