Self-assembly and enhanced visible-light-driven photocatalytic activity of reduced graphene oxide-Bi2WO6 photocatalysts

AbstractThe reduced graphene oxide-Bi2WO6 (rGO-BWO) photocatalysts with different RM values (mass ratio of GO and Bi2WO6) had been successfully synthesized via hydrothermal method in the presence of GO. When increasing the RM values from 0 to 2%, the evident red shift of the absorption edges of rGO-BWO samples occurred, and the photocatalytic activities for the degradation of Rhodamine-B were enhanced gradually. However, there was a significant blue shift in the absorbance band, and the morphology of the incomplete rGO-BWO microspheres led to the lower photocatalytic activity when RM is increased from 4 to 10%. The enhanced photocatalytic activity can be attributed to the smaller band gap, which means needing less energy for the electron transition, the morphology of the unbroken microsphere that provides more possible reaction sites for the photocatalytic reaction, the appropriate GO content that may effectively mitigate electron-hole pair recombination by the migration of photoinduced electrons.

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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

Journal of Nanomaterials ◽

10.1155/2016/6201546 ◽

2016 ◽

Vol 2016 ◽

pp. 1-11 ◽

Cited By ~ 6

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.

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Visible light driven reduced graphene oxide supported ZnMgAl LTH/ZnO/g-C3N4 nanohybrid photocatalyst with notable two-dimension formation for enhanced photocatalytic activity towards organic dye degradation

Environmental Research ◽

10.1016/j.envres.2021.111079 ◽

2021 ◽

Vol 197 ◽

pp. 111079

Author(s):

K. Bhuvaneswari ◽

G. Palanisamy ◽

G. Bharathi ◽

T. Pazhanivel ◽

Indra Raj Upadhyaya ◽

...

Keyword(s):

Photocatalytic Activity ◽

Graphene Oxide ◽

Visible Light ◽

Reduced Graphene Oxide ◽

Dye Degradation ◽

Organic Dye ◽

Two Dimension ◽

Reduced Graphene ◽

Visible Light Driven ◽

Organic Dye Degradation

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A new Ru(ii) polypyridyl complex as an efficient photosensitizer for enhancing the visible-light-driven photocatalytic activity of a TiO2/reduced graphene oxide nanocomposite for the degradation of atrazine: DFT and mechanism insights

RSC Advances ◽

10.1039/c9ra06704c ◽

2020 ◽

Vol 10 (38) ◽

pp. 22500-22514

Author(s):

Amir Hossein Cheshme Khavar ◽

Gholamreza Moussavi ◽

Kamyar Yaghmaeian ◽

Ali Reza Mahjoub ◽

Neda Khedri ◽

...

Keyword(s):

Photocatalytic Activity ◽

Graphene Oxide ◽

Visible Light ◽

Reduced Graphene Oxide ◽

Polypyridyl Complex ◽

Reduced Graphene ◽

Visible Light Driven ◽

Photocatalytic Reactions

TiO2 is one of the most widely used semiconductors for photocatalytic reactions.

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Constructing ternary CdS/reduced graphene oxide/TiO 2 nanotube arrays hybrids for enhanced visible-light-driven photoelectrochemical and photocatalytic activity

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2014.12.029 ◽

2015 ◽

Vol 168-169 ◽

pp. 105-113 ◽

Cited By ~ 29

Author(s):

Hui Li ◽

Zhengbin Xia ◽

Jiangqiong Chen ◽

Liang Lei ◽

Junheng Xing

Keyword(s):

Photocatalytic Activity ◽

Graphene Oxide ◽

Visible Light ◽

Reduced Graphene Oxide ◽

Nanotube Arrays ◽

Reduced Graphene ◽

Visible Light Driven

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Enhanced visible light-driven photocatalytic activity of reduced graphene oxide/cadmium sulfide composite: Methylparaben degradation mechanism and toxicity

Chemosphere ◽

10.1016/j.chemosphere.2020.128481 ◽

2021 ◽

Vol 264 ◽

pp. 128481

Author(s):

Harshavardhan Mohan ◽

Vaikundamoorthy Ramalingam ◽

Natesan Karthi ◽

Sundaramoorthy Malathidevi ◽

Taeho Shin ◽

...

Keyword(s):

Photocatalytic Activity ◽

Graphene Oxide ◽

Visible Light ◽

Cadmium Sulfide ◽

Reduced Graphene Oxide ◽

Degradation Mechanism ◽

Reduced Graphene ◽

Visible Light Driven

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Spherical NiWO4-reduced graphene oxide nanocomposite for effective visible light driven photocatalytic activity for the decolourisation of organic pollutants

Arabian Journal of Chemistry ◽

10.1016/j.arabjc.2020.09.017 ◽

2020 ◽

Vol 13 (11) ◽

pp. 8489-8497 ◽

Cited By ~ 1

Author(s):

Sathish Mohan Botsa ◽

M. Jagadeesh Babu ◽

P. Suresh ◽

P. Kalyani ◽

B. Venkateswararao ◽

...

Keyword(s):

Photocatalytic Activity ◽

Graphene Oxide ◽

Visible Light ◽

Reduced Graphene Oxide ◽

Organic Pollutants ◽

Reduced Graphene ◽

Visible Light Driven

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Indium-substituted ZnO/reduced graphene oxide nanocomposites: Solvothermal synthesis and enhanced visible-light-driven photocatalytic activity

Functional Materials Letters ◽

10.1142/s1793604714500131 ◽

2014 ◽

Vol 07 (02) ◽

pp. 1450013 ◽

Cited By ~ 1

Author(s):

Jie Zhu ◽

Wanhong He ◽

Lu Zhang ◽

Xu Xiang ◽

Zhiwei Li

Keyword(s):

Photocatalytic Activity ◽

Graphene Oxide ◽

Visible Light ◽

Reduced Graphene Oxide ◽

Dye Degradation ◽

Shielding Effect ◽

Bandgap Engineering ◽

Composite Photocatalyst ◽

Reduced Graphene ◽

Visible Light Driven

A new protocol was developed to obtain a composite photocatalyst by incorporating indium to ZnO and subsequently assembling it with reduced graphene oxide (RGO) sheets. The incorporation of indium led to lattice distortion of ZnO and introduction of defect levels. The hybridization with RGO could improve the electron transport and extend the lifetime of photo-generated carriers, leading to enhanced activity for dye degradation driven by visible light. The photocatalytic activity appeared to be dependent on the relative quantity of RGO. The optimized quantity resulted in the highest activity due to the dual role of electron shuttle and "shielding effect" of RGO. In addition, the composite photocatalyst exhibited excellent repeatable use performance, suggestive of its high stability. This study proposed a promising strategy to construct photocatalysts by rational bandgap engineering and tunable composite technology.

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