High solar-light photocatalytic activity of using Cu 3 Se 2 /rGO nanocomposites synthesized by a green co-precipitation method

Nouri, Morteza; Saray, Abdolali Moghaddam; Azimi, H.R.; Yousefi, Ramin

doi:10.1016/j.solidstatesciences.2017.09.001

Cited by 35 publications

(10 citation statements)

References 21 publications

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“…The TEM images, XPS spectra, and PL results showed that these parameters were not very different for the Mg‐doped and Cd‐doped ZnO to cause such different photocatalytic performances. Recently, we observed that rGO is the most important factor to enhance the photocatalytic performance of semiconducting/rGO nanocomposites compared with the size of the nanostructures . Therefore, there should be a greater factor for such a major difference in the photocatalytic activity of Mg‐doped ZnO NPs.…”

Section: Resultsmentioning

confidence: 99%

“…[32] However,t hese parameters Recently,w eo bserved that rGO is the most important factor to enhance the photocatalytic performance of semiconducting/rGO nanocomposites comparedw ith the size of the nanostructures. [33,34] Therefore, there should be ag reater factor for such am ajor difference in the photocatalytic activity of Mg-doped ZnO NPs. The photocatalytic activity of the samples was examined three times by centrifuging the MB and washing the NPs and nanocomposites, and the resultsa re showni nF igure 7.…”

Section: Photocatalyst Measurements and Mechanismsmentioning

confidence: 99%

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Experimental and Theoretical Study of Enhanced Photocatalytic Activity of Mg‐Doped ZnO NPs and ZnO/rGO Nanocomposites

Yousefi

Beheshtian

Seyed‐Talebi

et al. 2018

Chemistry An Asian Journal

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A systematic experimental and theoretical study of the origin of the enhanced photocatalytic performance of Mg-doped ZnO nanoparticles (NPs) and Mg-doped ZnO/reduced graphene oxide (rGO) nanocomposites has been performed. In addition to Mg, Cd was chosen as a doping material for the bandgap engineering of ZnO NPs, and its effects were compared with that of Mg in the photocatalytic performance of ZnO nanostructures. The experimental results revealed that Mg, as a doping material, recognizably ameliorates the photocatalytic performance of ZnO NPs and ZnO/graphene nanocomposites. Transmission electron microscopy (TEM) images showed that the Mg-doped and Cd-doped ZnO NPs had the same size. The optical properties of the samples indicated that Cd narrowed the bandgap, whereas Mg widened the bandgap of the ZnO NPs and the oxygen vacancy concentration was similar for both samples. Based on the experimental results, the narrowing of the bandgap, the particle size, and the oxygen vacancy did not enhance the photocatalytic performance. However, Brunauer-Emmett-Teller (BET) and Barret-Joyner-Halenda (BJH) models showed that Mg caused increased textural properties of the samples, whereas rGO played an opposite role. A theoretical study, conducted by using DFT methods, showed that the improvement in the photocatalytic performance of Mg-doped ZnO NPs was due to a higher electron transfer from the Mg-doped ZnO NPs to the dye molecules compared with pristine ZnO and Cd-doped ZnO NPs. Moreover, according to the experimental results, along with Mg, graphene also played an important role in the photocatalytic performance of ZnO.

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Section: Resultsmentioning

confidence: 99%

Section: Photocatalyst Measurements and Mechanismsmentioning

confidence: 99%

Experimental and Theoretical Study of Enhanced Photocatalytic Activity of Mg‐Doped ZnO NPs and ZnO/rGO Nanocomposites

Yousefi

Beheshtian

Seyed‐Talebi

et al. 2018

Chemistry An Asian Journal

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“…It can be seen that all peak positions of GO sheets are shifted, which is a sign of the interaction of benzene and GO sheets. However, some peaks belong to the benzene 617 cm -1 and 1104 cm -1 [27]. Besides, the peak at 2911 cm -1 belongs to the reduced graphene oxide (rGO) that was observed in our previous work [26].…”

Section: Sem Observations and Ft-ir Analysismentioning

confidence: 61%

“…For GO, the broad peak centered at 3232 cm -1 is attributed to the O-H stretching vibrations. On the other hand, the peaks at 1719, 1604, 1367, and 1271 cm -1 are assigned to the C═O stretching, sp 2 -hybridized C═C group, and O-H bending, C-OH stretching, and C-O-C stretching, respectively [27]. Also, the peaks at 1110 and 1014 cm -1 can be attributed to the C-O vibration of the epoxy or alkoxy groups [28].…”

Section: Sem Observations and Ft-ir Analysismentioning

confidence: 99%

Benzene Degradation by Free and Immobilized <i>Bacillus glycinifermantans</i> Strain GO-13T Using GO Sheets

Mohammadpour¹,

Shahriarinour²,

Yousefi³

2020

Pol. J. Environ. Stud.

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Petroleum hydrocarbon compounds are commonly known as soil and groundwater contaminants. Bacteria need to come in physical contact with these compounds to degrade them. A wide variety of hydrocarbon degradation can be found due to the affinity of a bacterial strain toward a particular hydrocarbon. Due to the similarity in the structure of most of the aromatic hydrocarbon pollutants, it is possible that the bacterial strain showing affinity toward one hydrocarbon reveals an affinity toward other related aromatic hydrocarbons. Whenever there is physical contact between cells and pollutants, biofilm formation and surfactant production can take place for increasing hydrocarbon bioavailability and biodegradation [1]. Volatile monoaromatic hydrocarbons of crude petroleum and petroleum products, which are commonly found together, are benzene, toluene, ethylbenzene, and xylene [BTEX]. These compounds are dangerous to human

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“…In the precipitation method, substances with different chemical components are mixed, and a precipitant is added to obtain a precursor precipitate. The precursor precipitate is then dried or calcined to produce the corresponding nanoparticles [201][202][203][204][205][206]. When the particle diameter is about 1 µm, a precipitate is formed.…”

Section: Precipitation Methodsmentioning

confidence: 99%

Recent Advances and Applications of Semiconductor Photocatalytic Technology

et al. 2019

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Along with the development of industry and the improvement of people’s living standards, peoples’ demand on resources has greatly increased, causing energy crises and environmental pollution. In recent years, photocatalytic technology has shown great potential as a low-cost, environmentally-friendly, and sustainable technology, and it has become a hot research topic. However, current photocatalytic technology cannot meet industrial requirements. The biggest challenge in the industrialization of photocatalyst technology is the development of an ideal photocatalyst, which should possess four features, including a high photocatalytic efficiency, a large specific surface area, a full utilization of sunlight, and recyclability. In this review, starting from the photocatalytic reaction mechanism and the preparation of the photocatalyst, we review the classification of current photocatalysts and the methods for improving photocatalytic performance; we also further discuss the potential industrial usage of photocatalytic technology. This review also aims to provide basic and comprehensive information on the industrialization of photocatalysis technology.

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High solar-light photocatalytic activity of using Cu 3 Se 2 /rGO nanocomposites synthesized by a green co-precipitation method

Cited by 35 publications

References 21 publications

Experimental and Theoretical Study of Enhanced Photocatalytic Activity of Mg‐Doped ZnO NPs and ZnO/rGO Nanocomposites

Experimental and Theoretical Study of Enhanced Photocatalytic Activity of Mg‐Doped ZnO NPs and ZnO/rGO Nanocomposites

Benzene Degradation by Free and Immobilized <i>Bacillus glycinifermantans</i> Strain GO-13T Using GO Sheets

Recent Advances and Applications of Semiconductor Photocatalytic Technology

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