Photocatalytic Hydrogen Evolution over Cr3+Doped Porous CdIn2S4 Photocatalysts under Visible Light Irradiation

2012 ◽  
Vol 486 ◽  
pp. 181-186
Author(s):  
Xue Feng Bai ◽  
Jin Shu Li
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Doping Concentration ◽  
Hydrothermal Process ◽  
Sodium Dodecyl ◽  
Reflectance Spectroscopy ◽  
Photocatalytic Hydrogen Evolution ◽  
Micro Morphology ◽  
Facile Hydrothermal Process ◽  
Good Optical Property

A series of Cr3+doped porous CdIn2S4photocatalysts with good optical property were synthesized via a facile hydrothermal process using sodium dodecyl sulfate (SDS) as template. The above-prepared photocatalysts were characterized by XRD, field emission scanning electron microscopy (FESEM), UV-Vis diffusive reflectance spectroscopy (DRS) and XPS. The influences of Cr3+doping concentration on the morphology and photocatalytic activity of CdIn2S4photocatalysts were investigated. The results demonstrated that the presence of Cr3+doping in the CdIn2S4photocatalyst had significantly influence on the crystal structure, micro-morphology, e--h+recombination and photocatalytic activity. The photocatalytic hydrogen evolution of CdIn2S4was enhanced by doping, and the highest rate of hydrogen evolution of 758.8 μmol/(h·g) over Cr3+(0.5%)-CdIn2S4was observed.

Cobalt ion redox and conductive polymers boosted the photocatalytic activity of the graphite carbon nitride–Co3O4 Z-scheme heterostructure

2021 ◽  
Vol 45 (1) ◽  
pp. 162-168
Author(s):  
Tao Li ◽  
Jiandong Cui ◽  
Yezhan Lin ◽  
Kecheng Liu ◽  
Rui Li ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Synergistic Effect ◽  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Conductive Polymers ◽  
Cobalt Ion ◽  
Photocatalytic Hydrogen Evolution ◽  
Conductive Polyaniline

The enhanced photocatalytic hydrogen evolution performance of g-C3N4–Co3O4 2D–1D Z-scheme heterojunctions was achieved through the synergistic effect of the cobalt ion redox, conductive polyaniline, and a Co3O4 nanobelt.

scholarly journals Conjugated Polymer Donor-Molecular Acceptor Nanohybrids for Photocatalytic Hydrogen Evolution

2019 ◽  
Author(s):  
Haofan Yang ◽  
Xiaobo Li ◽  
Reiner Sebastian Sprick ◽  
Andrew I. Cooper
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Conjugated Polymers ◽  
Hydrogen Evolution ◽  
Conjugated Polymer ◽  
Apparent Quantum Yield ◽  
High Hydrogen ◽  
Photocatalytic Hydrogen Evolution ◽  
Efficient Charge ◽  
Donor Acceptor

A library of 237 organic binary/ternary nanohybrids consisting of conjugated polymers donors and both fullerene and non-fullerene molecular acceptors was prepared and screened for sacrificial photocatalytic hydrogen evolution. These donor-acceptor nanohybrids (DANHs) showed significantly enhanced hydrogen evolution rates compared with the parent donor or acceptor compounds. DANHs of <a></a><a>a polycarbazole</a>-based donor combined with a methanofullerene acceptor (PCDTBT/PC<sub>60</sub>BM) showed a high hydrogen evolution rate of 105.2 mmol g<sup>-1</sup> h<sup>-1</sup> under visible light (λ > 420 nm). This DANH photocatalyst produced 5.9 times more hydrogen than a sulfone-containing polymer (P10) under the same conditions, which is one of the most efficient organic photocatalysts reported so far. An apparent quantum yield of hydrogen evolution of 3.0 % at 595 nm was measured for this DANH. The photocatalytic activity of the DANHs, which in optimized cases reached 179.0 mmol g<sup>-1</sup> h<sup>-1</sup>, is attributed to efficient charge transfer at the polymer donor/molecular acceptor interface. We also show that ternary donor<sub>A</sub>-donor<sub>B</sub>-acceptor nanohybrids can give higher activities than binary donor-acceptor hybrids in some cases.

scholarly journals Template-Free Synthesis of Star-Like ZrO2 Nanostructures and Their Application in Photocatalysis

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Xue-Yu Tao ◽  
Jie Ma ◽  
Rui-Lin Hou ◽  
Xiang-Zhu Song ◽  
Lin Guo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Hydrothermal Process ◽  
Photocatalytic Property ◽  
Reflectance Spectroscopy ◽  
Raw Material ◽  
Narrow Bandgap ◽  
Excellent Photocatalytic Activity ◽  
Template Free

Star-like nano-ZrO2 has been synthesized using Zr(NO3)4·5H2O as zirconium source by a hydrothermal process without any template and surfactant. The structure of the as-prepared ZrO2 powder was investigated by multiple advanced analytical methods. The results showed that CH3COO− and NO3− had great effects on the formation of star-like ZrO2 nanostructures. The as-prepared ZrO2 had a superior catalytic activity, and the reason for it was analyzed by UV-Vis diffuse reflectance spectroscopy. The effect of raw material ratios on the photocatalytic property of ZrO2 was studied. The synthesized ZrO2 showed a narrow bandgap (3.50–3.85 eV) and an excellent photocatalytic activity, and the degradation of RhB was up to nearly 100% in 30 min with this photocatalyst.

Fabrication of selective interface of ZnO/CdS heterostructures for more efficient photocatalytic hydrogen evolution

2018 ◽  
Vol 47 (35) ◽  
pp. 12162-12171 ◽  
Author(s):  
Xinlong Ma ◽  
Fei Zhao ◽  
Qinping Qiang ◽  
Tongyao Liu ◽  
Yuhua Wang
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution

Selective interface in ZnO/CdS heterostructure promote the photocatalytic activity.

Hydrogenated ZnIn2S4 microspheres: boosting photocatalytic hydrogen evolution by sulfur vacancy engineering and mechanism insight

2019 ◽  
Vol 21 (45) ◽  
pp. 25484-25494 ◽  
Author(s):  
Yanze Wang ◽  
Da Chen ◽  
Laishun Qin ◽  
Junhui Liang ◽  
Yuexiang Huang
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Sulfur Vacancy ◽  
Photocatalytic Hydrogen Evolution

The correlation between hydrogenation-induced surface sulfur vacancies and photocatalytic activity of hydrogenated ZnIn2S4 is tentatively proposed in this work.

Highly Active S-Doping MnFe2O4 by Synthesis and Photo-Fenton Catalytic Property Research

2014 ◽  
Vol 1073-1076 ◽  
pp. 795-798
Author(s):  
Yu Niu ◽  
Fu Ying Li ◽  
Ren Zhang Wang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light Irradiation ◽  
Hydrothermal Process ◽  
Reflectance Spectroscopy ◽  
Basic Fuchsin ◽  
X Ray ◽  
Ph Values ◽  
Highly Active ◽  
Degradation Ratio

Composite oxide MnFe2O4 have been synthesized via the hydrothermal process and then modified by S=O. These compounds were characterized by X-ray diffusions, and ultraviolet-visible diffusion reflectance spectroscopy. MnFe2O4 exhibits stronger photocatalytic activity, with 95.5% degradation ratio of methyl orange and 91% degradation ratio of basic fuchsin, after 120 minutes visible-light irradiation in the presence of H2O2. In addition, the effect of pH values on photocatalytic activity were also investigated.

Substituent effect of conjugated microporous polymers on the photocatalytic hydrogen evolution activity

2020 ◽  
Vol 8 (5) ◽  
pp. 2404-2411 ◽  
Author(s):  
Xiaomin Gao ◽  
Chang Shu ◽  
Chong Zhang ◽  
Wenyan Ma ◽  
Shi-Bin Ren ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Substituent Effect ◽  
Evolution Rate ◽  
Photocatalytic Hydrogen Evolution ◽  
Microporous Polymers ◽  
Hydrogen Evolution Rate ◽  
Conjugated Microporous Polymers

The influence of substituent groups on the photocatalytic activity of conjugated microporous polymers was investigated, and a high photocatalytic hydrogen evolution rate of 18.93 mmol h−1 g−1 was achieved by PyDF with fluorine atoms.

scholarly journals Synthesis and enhanced photocatalytic performance of 0D/2D CuO/tourmaline composite photocatalysts

2020 ◽  
Vol 11 ◽  
pp. 407-416 ◽  
Author(s):  
Changqiang Yu ◽  
Min Wen ◽  
Zhen Tong ◽  
Shuhua Li ◽  
Yanhong Yin ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Organic Contaminants ◽  
Hydrothermal Process ◽  
Charge Carriers ◽  
Molecular Vibration ◽  
Surface Element ◽  
Composite Photocatalysts ◽  
Excellent Photocatalytic Activity ◽  
Photoinduced Charge ◽  
Facile Hydrothermal Process

Photocatalysis is considered to be a green and promising technology for transforming organic contaminants into nontoxic products. In this work, a CuO/tourmaline composite with zero-dimensional/two-dimensional (0D/2D) CuO architecture was successfully obtained via a facile hydrothermal process, and its photocatalytic activity was evaluated by the degradation of methylene blue (MB). Surface element valence state and molecular vibration characterization revealed that CuO chemically interacted with tourmaline via Si–O–Cu bonds. The specific surface area of the CuO/tourmaline composite (23.60 m2 g−1) was larger than that of the pristine CuO sample (3.41 m2 g−1). The CuO/tourmaline composite exhibited excellent photocatalytic activity for the degradation of MB, which was ascribed to the increase in the quantity of the adsorption-photoreactive sites and the efficient utilization of the photoinduced charge carriers. This study provides a facile strategy for the construction of 0D/2D CuO structures and the design of tourmaline-based functional composite photocatalysts for the treatment of organic contaminants in water.

scholarly journals pH dependent photocatalytic hydrogen evolution by self-assembled perylene bisimides

2017 ◽  
Vol 5 (16) ◽  
pp. 7555-7563 ◽  
Author(s):  
Michael C. Nolan ◽  
James J. Walsh ◽  
Laura L. E. Mears ◽  
Emily R. Draper ◽  
Matthew Wallace ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Self Assembly ◽  
The Self ◽  
Photocatalytic Hydrogen Evolution ◽  
Perylene Bisimide ◽  
Ph Dependent ◽  
Self Assembled ◽  
Perylene Bisimides

We show the importance of the self-assembly of a perylene bisimide on its photocatalytic activity.

Electrochemical Properties of Nanoflower-Like NiCo2O4 Electrode Material

2020 ◽  
Vol 15 (2) ◽  
pp. 231-236
Author(s):  
Shiwei Song ◽  
Yan Zhao ◽  
Dong Zhang ◽  
Yucai Li ◽  
Jian Wang ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Electrode Material ◽  
Volume Expansion ◽  
Hydrothermal Process ◽  
Sodium Dodecyl ◽  
Thin Layers ◽  
Lateral Size ◽  
Ni Foam ◽  
Air Atmosphere ◽  
Facile Hydrothermal Process

A nanoflower-like NiCo2O4 was successfully synthesized on Ni foam by a facile hydrothermal process with sodium dodecyl sulfate (SDS) by annealing in air atmosphere. The special architecture consists of uniform ultra-thin layers with a lateral size of several hundred nanometers intercrossed with each other, which promote the surface Faraday reaction and relive the volume expansion. The as-fabricated NiCo2O4 nanoflower delivers a specific capacitance of 752 F g–1 at 1 A g–1, and 78.6% retainable capacitance after 5000 cycles.

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