A highly photoactive, visible-light-driven graphene/2D mesoporous TiO2 photocatalyst

2015 ◽  
Vol 17 (7) ◽  
pp. 3972-3978 ◽  
Author(s):  
Kyeong Min Cho ◽  
Kyoung Hwan Kim ◽  
Hyung Ouk Choi ◽  
Hee-Tae Jung
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Surface Area ◽  
Charge Separation ◽  
Mesoporous Tio2 ◽  
Tio2 Photocatalyst ◽  
Enhanced Absorption ◽  
Reduced Graphene ◽  
Visible Light Driven

In this paper, we have reported a new, visible-light-driven photocatalyst composed of 2D mesoporous TiO2 on reduced graphene oxide, which enables enhanced absorption of visible light, showing outstanding charge separation ability, and a large surface area.

scholarly journals Three-Dimensional Zn0.5Cd0.5S/Reduced Graphene Oxide Hybrid Aerogel: Facile Synthesis and the Visible-Light-Driven Photocatalytic Property for Reduction of Cr(VI) in Water

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Wei Xiao ◽  
Wenjie Zhou ◽  
Yanhua Zhang ◽  
Liangliang Tian ◽  
Hongdong Liu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Visible Light ◽  
Specific Surface ◽  
Reduced Graphene Oxide ◽  
Surface Area ◽  
Specific Surface Area ◽  
Three Dimensional ◽  
Reduced Graphene ◽  
Visible Light Driven

A series of three-dimensional ZnxCd1-xS/reduced graphene oxide (ZnxCd1-xS/RGO) hybrid aerogels was successfully synthesized based on a one-pot hydrothermal approach, which were subsequently used as visible-light-driven photocatalysts for photoreduction of Cr(VI) in water. Over 95% of Cr(VI) was photoreduced by Zn0.5Cd0.5S/RGO aerogel material within 140 min, and such photocatalytic performance was superior to that of other ZnxCd1-xS/RGO aerogel materials (x≠0.5) and bare Zn0.5Cd0.5S. It was assumed that the enhanced photocatalytic activity of Zn0.5Cd0.5S/RGO aerogel was attributed to its high specific surface area and the preferable synergetic catalytic effect between Zn0.5Cd0.5S and RGO. Besides, Zn0.5Cd0.5S/RGO aerogel materials were robust and durable enough so that they could be reused several times with merely limited loss of photocatalytic activity. The chemical composition, phase, structure, and morphology of Zn0.5Cd0.5S/RGO aerogel material were carefully examined by a number of techniques like XRD, SEM, TEM, BET, Raman characterizations, and so on. It was found that Zn0.5Cd0.5S/RGO aerogel possessed hierarchically porous architecture with the specific surface area as high as 260.8 m2 g−1. The Zn0.5Cd0.5S component incorporated in Zn0.5Cd0.5S/RGO aerogel existed in the form of solid solution nanoparticles, which were uniformly distributed in the RGO matrix.

scholarly journals Sustainable Recovery of CO2 by Using Visible-Light-Responsive Crystal Cuprous Oxide/Reduced Graphene Oxide

2018 ◽  
Vol 10 (11) ◽  
pp. 4145 ◽  
Author(s):  
Shou-Heng Liu ◽  
Jun-Sheng Lu ◽  
Yi-Chiun Chen
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Cuprous Oxide ◽  
Solution Chemistry ◽  
Diffuse Reflection Spectroscopy ◽  
Enhanced Absorption ◽  
Reduced Graphene

A simple solution-chemistry method has been investigated to prepare crystal cuprous oxide (Cu2O) incorporated with reduced graphene oxide (designated as Cu2O-rGO-x, where x represents the contents of rGO = 1%, 5% and 10%) in this work. These Cu2O-rGO-x composites combine the prospective advantages of rhombic dodecahedra Cu2O together with rGO nanosheets which have been studied as visible-light-sensitive catalysts for the photocatalytic production of methanol from CO2. Among the Cu2O-rGO-x photocatalysts, the methanol yield photocatalyzed by Cu2O-rGO-5% can be observed to be 355.26 μmol g−1cat, which is ca. 36 times higher than that of pristine Cu2O nanocrystal in the 20th hour under visible light irradiation. The improved activity may be attributed to the enhanced absorption ability of visible light, the superior separation of electron–hole pairs, well-dispersed Cu2O nanocrystals and the increased photostability of Cu2O, which are evidenced by employing UV-vis diffuse reflection spectroscopy, photoluminescence, scanning electron microscopy/transmission electron microscopy and X-ray photoelectron spectroscopy, respectively. This work demonstrates an easy and cost-effective route to prepare non-noble photocatalysts for efficient CO2 recovery in artificial photosynthesis.

Silver nanoparticles modified reduced graphene oxide wrapped Ag3PO4/TiO2 visible-light-active photocatalysts with superior performance

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43697-43706 ◽  
Author(s):  
Can Cui ◽  
Yiwei Qiu ◽  
Haihua Hu ◽  
Ni Ma ◽  
Shuang Li ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Charge Separation ◽  
Rational Design ◽  
Superior Performance ◽  
Reduced Graphene ◽  
Visible Light Active

Rational design of a novel Ag3PO4/TiO2/Ag-rGO photocatalyst with both electron and hole pathways for charge separation.

Biomolecule-mediated CdS-TiO2-reduced graphene oxide ternary nanocomposites for efficient visible light-driven photocatalysis

2015 ◽  
Vol 44 (1) ◽  
pp. 193-201 ◽  
Author(s):  
Soumen Dutta ◽  
Ramakrishna Sahoo ◽  
Chaiti Ray ◽  
Sougata Sarkar ◽  
Jayasmita Jana ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Charge Recombination ◽  
Reduced Graphene ◽  
Visible Light Driven

Charge recombination in yellow CdS has been overcome by rGO and interfacial TiO2 to show maximum visible-light-driven photocatalytic activity.

Zn2SnO4-Reduced Graphene Oxide Nanohybrids for Visible-Light-Driven Photocatalysis

2018 ◽  
Vol 18 (2) ◽  
pp. 999-1005 ◽  
Author(s):  
Hui Li ◽  
Xiang-Feng Wu ◽  
Yang Sun ◽  
Ze-Hua Zhao ◽  
Chen-Xu Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
Visible Light Driven
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