3D spatially branched hierarchical Z-scheme CdS-Au nanoclusters-ZnO hybrids with boosted photocatalytic hydrogen evolution

Liang, Shujie; Han, Bin; Liu, Xueming; Chen, Weiyi; Peng, Miao; Guan, Guijian; Deng, Hong; Lin, Zhang

doi:10.1016/j.jallcom.2018.04.202

Cited by 72 publications

(24 citation statements)

References 54 publications

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“…This will provide a platform for a higher photocatalytic activity. 20,21 However, the Z -scheme heterostructure requires electron mediators, mostly in the liquid form in the first generation Z -scheme and noble metal in the second generation. 8 The liquid electron mediator limits the applications of the first generation and the noble metal electron mediator increases the cost of photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Direct Z-Scheme Cs₂O–Bi₂O₃–ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts

et al. 2018

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Limited light absorption, inefficient electron–hole separation, and unsuitable positions of conduction band bottom and/or valence band top are three major critical issues associated with high-efficiency photocatalytic water treatment. An attempt has been carried out here to address these issues through the synthesis of direct Z -scheme Cs 2 O–Bi 2 O 3 –ZnO heterostructures via a facile, fast, and economic method: solution combustions synthesis. The photocatalytic performances are examined by the 4-chlorophenol degradation test under simulated sunlight irradiation. UV–vis diffuse reflectance spectroscopy analysis, electrochemical impedance test, and the observed transient photocurrent responses prove not only the significant role of Cs 2 O in extending light absorption to visible and near-infrared regions but also its involvement in charge carrier separation. Radical-trapping experiments verify the direct Z -scheme approach followed by the charge carriers in heterostructured Cs 2 O–Bi 2 O 3 –ZnO photocatalysts. The Z -scheme charge carrier pathway induced by the presence of Cs 2 O has emerged as the reason behind the efficient charge carrier separation and high photocatalytic activity.

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Section: Introductionmentioning

confidence: 99%

Direct Z-Scheme Cs₂O–Bi₂O₃–ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts

et al. 2018

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“…Ingesamt bestätigt diese Arbeit, dass die 3D-Morphologie und der direkte Z-Schema-Ladungsträgertransfermechanismus stets von Bedeutung fürd ie Steigerung der photokatalytischen Aktivität eines gegebenen Photokatalysators sind. [129,155] Zudem haben die CO 2 -Adsorption und die Desorption entsprechender Produkte auf der Oberfläche von Photokatalysatoren einen entscheidenden Einfluss auf die Leistungsfähigkeit der CO 2 -photokatalytischen Reduktion. [156,157] Für einen gegebenen direkten Z-Schema-Photokatalysator bewirkt eine genügend große CO 2 -Adsorptionsenergie eine ausreichend lange Verweildauer von CO 2 auf der Oberfläche, [12,158] was zwangsläufig eine CO 2 -Reduktionsreaktion in Gang setzt.…”

Section: Angewandte Chemieunclassified

“…Zudem wurde die Rekombination der Ladungsträger des ZnIn 2 S 4 /TiO 2 ‐Kompositmaterials erheblich unterdrückt, wie aus der längeren PL‐Abklingdauer hervorging, die sich beim direkten Z‐Schema‐System durch die schnelle Ladungsträgerwanderung ergibt. Ingesamt bestätigt diese Arbeit, dass die 3D‐Morphologie und der direkte Z‐Schema‐Ladungsträgertransfermechanismus stets von Bedeutung für die Steigerung der photokatalytischen Aktivität eines gegebenen Photokatalysators sind [129, 155] …”

Section: Direkte Z‐schema‐photokatalysesystemeunclassified

Z‐Schema‐Photokatalysesysteme für die Kohlendioxidreduktion: Wo stehen wir heute?

2020

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Wee-Jun Ong erhielt seinen B.Eng. und Ph.D. in chemischer Verfahrenstechnik von der Monash University (Australien)u nter Anleitung von Prof. S.-P. Chai. 2016 wechselte er als wissenschaftlicher Mitarbeiter zu IMRE, A*STAR (Singapur). 2018 wurde er Assistant Professor an der Xiamen University (Malaysia); 2019 wurde er dort zum Associate Professor ernannt. 2019 war er Gastwissenschaftler am Center for Advancing Electronics Dresden (cfaed) der TU Dresden und ist derzeit Gastwissenschaftler am Lawrence

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“…Further, electron mediator plays an important role in the efficiency of indirect Z-scheme system. Noble metals such as Ag, Au, and Pt have been reported as electron mediators for Z-scheme photocatalysts [9][10][11]. However, noble metals-based Z-scheme systems are costly and require complex synthesis protocols.…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes Incorporated Z-Scheme Assembly of AgBr/TiO2 for Photocatalytic Hydrogen Production under Visible Light Irradiations

et al. 2019

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Photocatalytic H 2 production is a promising strategy toward green energy and alternative to carbon-based fuels which are the root cause of global warming and pollution. In this study, carbon nanotubes (CNTs) incorporated Z-scheme assembly of AgBr/TiO 2 was developed for photocatalytic H 2 production under visible light irradiations. Synthesized photocatalysts were characterized through transmission electron microscope (TEM), X-ray photoelectron spectra (XPS), X-ray diffractometer (XRD), Fourier transform infrared (FTIR), photoluminescence spectra (PL), Brunauer Emmet-Teller(BET), and UV-vis spectroscopy analysis techniques. The composite photocatalysts exhibited a H 2 production of 477 ppm which was three-folds higher than that produced by TiO 2 . The good performance was attributed to the strong interaction of three components and the reduced charge recombination, which was 89 and 56.3 times lower than the TiO 2 and AgBr/TiO 2 . Furthermore, the role of surface acidic and basic groups was assessed and the photocatalytic results demonstrated the importance of surface functional groups. In addition, the composites exhibited stability and reusability for five consecutive cycles of reaction. Thus, improved performance of the photocatalyst was credited to the CNTs as an electron mediator, surface functional groups, higher surface area, enhanced charge separation and extended visible light absorption edge. This work provides new development of Z-scheme photocatalysts for sustainable H 2 production.

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3D spatially branched hierarchical Z-scheme CdS-Au nanoclusters-ZnO hybrids with boosted photocatalytic hydrogen evolution

Cited by 72 publications

References 54 publications

Direct Z-Scheme Cs₂O–Bi₂O₃–ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts

Direct Z-Scheme Cs₂O–Bi₂O₃–ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts

Z‐Schema‐Photokatalysesysteme für die Kohlendioxidreduktion: Wo stehen wir heute?

Carbon Nanotubes Incorporated Z-Scheme Assembly of AgBr/TiO2 for Photocatalytic Hydrogen Production under Visible Light Irradiations

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3D spatially branched hierarchical Z-scheme CdS-Au nanoclusters-ZnO hybrids with boosted photocatalytic hydrogen evolution

Cited by 72 publications

References 54 publications

Direct Z-Scheme Cs2O–Bi2O3–ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts

Direct Z-Scheme Cs2O–Bi2O3–ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts

Z‐Schema‐Photokatalysesysteme für die Kohlendioxidreduktion: Wo stehen wir heute?

Carbon Nanotubes Incorporated Z-Scheme Assembly of AgBr/TiO2 for Photocatalytic Hydrogen Production under Visible Light Irradiations

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Product

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Direct Z-Scheme Cs₂O–Bi₂O₃–ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts

Direct Z-Scheme Cs₂O–Bi₂O₃–ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts