Graphene-wrapped ZnO nanospheres as a photocatalyst for high performance photocatalysis

Chen, Da; Wang, Dongfang; Ge, Qisheng; Ping, Guangxing; Fan, Meiqiang; Qin, Laishun; Bai, Liqun; Lv, Chunju; Shu, Kangying

doi:10.1016/j.tsf.2014.11.051

Cited by 65 publications

(18 citation statements)

References 37 publications

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“…Moreover, the high-resolution TEM images (Fig.2h and 2i) revealed the intimate interface combinations between SnO 2 and RGO in SG-E and SG-C. These intimate interface combinations would induce possible electronic interaction between SnO 2 and RGO, which would benefit the charge separation and improve photocatalytic performance of SnO 2 [26]. The intimate interface combinations between RGO and SnO 2 in SG-E and SG-C were further investigated by XPS spectra.…”

Section: Resultsmentioning

confidence: 94%

“…In addition, the interface combination between graphene and semiconductor (such as electrostatic interaction, chemical bonding) will affect charge transfer efficiency [22][23][24]. Therefore, an investigation of the interface combinations in the graphene/semiconductor composites is important to understand the influence of the structural properties of the composites on their photocatalytic performance [25,26].…”

Section: Introductionmentioning

confidence: 99%

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Influence of interface combination of RGO-photosensitized SnO 2 @RGO core-shell structures on their photocatalytic performance

Shen

Zhao

Duan

et al. 2017

Applied Surface Science

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Influence of interface combination of RGO-photosensitized SnO 2 @RGO core-shell structures on their photocatalytic performance

Shen

Zhao

Duan

et al. 2017

Applied Surface Science

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“…21 In a typical synthesis, 2 g of graphite powder was added into 46 mL of 98% H 2 SO 4 under continuous stirring for 1 h at 0 o C in an ice bath. At the given intervals, 1 g of NaNO 3 and 6 g of KMnO 4 were added slowly to the above solution within 2 h. Afterwards, the solution was stirred for 2 h at 25 o C before diluting with 280 mL distilled water. Then, 6 mL of hydrogen peroxide was added to remove KMnO 4 excess.…”

Section: Synthesis Of Gomentioning

confidence: 99%

“…Therefore, various strategies, including structural design, noble metal loading, ion doping, and the coupling of semiconductors, have been proposed to extend the light absorption range or suppress the electron-hole recombination of ZnO. 4 Carbonaceous materials are of tremendous interest due to their unique pore structure, electronic properties, adsorptive capacity and acidity. These materials include activated carbon, carbon nanotubes and graphene.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide/Zinc Oxide (GO/ZnO) Nanocomposite as a Superior Photocatalyst for Degradation of Methylene Blue (MB)-Process Modeling by Response Surface Methodology (RSM)

Hosseini¹,

Babaei²

2016

Journal of the Brazilian Chemical Society

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The photocatalytic performance of graphene oxide/zinc oxide (GO/ZnO) nanocomposite was investigated for degradation of methylene blue (MB) from wastewater and was compared with that of zinc oxide (ZnO), graphene oxide (GO) and carbon nanotube/zinc oxide (CNT/ZnO). The properties of the GO/ZnO nanocomposite were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The SEM and TEM results revealed the nanostructure of the composite. The photocatalytic process was modeled by response surface methodology (RSM), considering four independent factors. The significance of the model was approved by analysis of variance (ANOVA) (determination coefficient R 2 = 0.95, R 2 adj = 0.91). The optimum conditions of the process were found to be at photocatalyst dosage, initial pH, H 2 O 2 concentration and irradiation time of 2.1 g L -1 , 4.5, 3.5 × 10 -4 mol L -1 and 140 min, respectively. The removal of MB over GO/ZnO was 99% under the optimum conditions and was superior than that over GO and CNT/ZnO. According to Pareto analysis of the modeling, the irradiation time and photocatalyst dosage were the most effective factors on the decolorization efficiency of methylene blue, respectively.

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“…Graphene consists of two-dimensional sheets of carbon atoms and carbon atoms are arranged in a hexagonal structure. Graphene has magnificent electrical conductivity and good mechanical properties [207]. The morphology of G-ZnO composites can enhance the photocatalytic efficiency.…”

Section: 24mentioning

confidence: 99%

Photocatalysis and Bandgap Engineering Using ZnO Nanocomposites

Johar

Afzal

Alazba

et al. 2015

Advances in Materials Science and Engineering

126

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Nanocomposites have a great potential to work as efficient, multifunctional materials for energy conversion and photoelectrochemical reactions. Nanocomposites may reveal more improved photocatalysis by implying the improvements of their electronic and structural properties than pure photocatalyst. This paper presents the recent work carried out on photoelectrochemical reactions using the composite materials of ZnO with CdS, ZnO with SnO 2 , ZnO with TiO 2 , ZnO with Ag 2 S, and ZnO with graphene and graphene oxide. The photocatalytic efficiency mainly depends upon the light harvesting span of a material, lifetime of photogenerated electron-hole pair, and reactive sites available in the photocatalyst. We reviewed the UV-Vis absorption spectrum of nanocomposite and photodegradation reported by the same material and how photodegradation depends upon the factors described above. Finally the improvement in the absorption band edge of nanocomposite material is discussed.

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Graphene-wrapped ZnO nanospheres as a photocatalyst for high performance photocatalysis

Cited by 65 publications

References 37 publications

Influence of interface combination of RGO-photosensitized SnO 2 @RGO core-shell structures on their photocatalytic performance

Influence of interface combination of RGO-photosensitized SnO 2 @RGO core-shell structures on their photocatalytic performance

Graphene Oxide/Zinc Oxide (GO/ZnO) Nanocomposite as a Superior Photocatalyst for Degradation of Methylene Blue (MB)-Process Modeling by Response Surface Methodology (RSM)

Photocatalysis and Bandgap Engineering Using ZnO Nanocomposites

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