Double Z-scheme ZnO/ZnS/g-C3N4 ternary structure for efficient photocatalytic H2 production

Dong, Zhifang; Wu, Yan; Thirugnanam, N.; Li, Gonglin

doi:10.1016/j.apsusc.2017.07.186

Cited by 207 publications

(47 citation statements)

References 83 publications

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“…A similar double Z‐scheme photocatalytic system (Bi 2 S 3 /SnS 2 /Bi 2 O 3 ) has also been reported by Yu et al for dye removal under sunlight irradiation . ZnO/ZnS/g‐C 3 N 4 ternary double Z‐scheme heterojunction has been synthesized by Dong et al for photocatalytic H 2 generation . Despite accomplishments of certain stimulating achievements by these double Z‐scheme photocatalysts, still improvements can be attained to scale up the practical application in the photocatalytic field.…”

Section: Introductionmentioning

confidence: 75%

“…Understandably then, scientists started focusing on the construction of ternary semiconductors with dual Z‐scheme pathway for more effective charge separation. Many research groups have reported their findings in designing unidirectional double Z‐scheme‐based photocatalysts for water redox reactions and degradation of harmful pollutants . Moreover, our group has reported photocatalytic reduction of Cr 6+ → Cr 3+ and water → H 2 over Cu–MoO 3 /g‐C 3 N 4 hybrid nanocomposite .…”

Section: Introductionmentioning

confidence: 84%

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Rational Design of a Coupled Confronting Z‐Scheme System Toward Photocatalytic Refractory Pollutant Degradation and Water Splitting Reaction

Kandi

Sahoo

Martha

et al. 2019

Adv Materials Inter

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photocatalyst. In this context, there are several reported works on Z-scheme-based semiconductors such as CdS/BiVO 4 , [2] BiVO 4 /CdS quantum dots (QDs), [3] CdS-WO 3 , [4] TiO 2 /CdS, [5] etc. Yet, the typical charge transfer process competes with the binary Z-scheme charge transfer and the photocatalytic performance is still unable to triumph the practical application, i.e., to conquer the concerns of sustainable energy and environment-related issues. Understandably then, scientists started focusing on the construction of ternary semiconductors with dual Z-scheme pathway for more effective charge separation. Many research groups have reported their findings in designing unidirectional double Z-scheme-based photocatalysts for water redox reactions and degradation of harmful pollutants. [6][7][8][9][10][11] Moreover, our group has reported photocatalytic reduction of Cr 6+ → Cr 3+ and water → H 2 over Cu-MoO 3 /g-C 3 N 4 hybrid nanocomposite. [6] Ternary Ag 2 CO 3 /CeO 2 /AgBr photocatalyst has been reported by Wen et al. with double Z-scheme configuration performing photodegradation of levofloxacin. [7] GO/Ag 2 CrO 4 /g-C 3 N 4 nanocomposite has been reported with superior photocatalytic performance toward refractory pollutant degradation [8] and AgBr@Bi 2 WO 6 /WO 3 for degrading rhodamine B. [9] A similar double Z-scheme photocatalytic system (Bi 2 S 3 /SnS 2 /Bi 2 O 3 ) has also been reported by Yu et al. for dye removal under sunlight irradiation. [10] ZnO/ZnS/g-C 3 N 4 ternary double Z-scheme heterojunction has been synthesized by Dong et al. for photocatalytic H 2 generation. [11] Despite accomplishments of certain stimulating achievements by these double Z-scheme photocatalysts, still improvements can be attained to scale up the practical application in the photocatalytic field. We report here a prototype novel confronting bidirectional double Z-schemebased UV-vis active photocatalyst with two single Z-scheme systems acting in opposite direction toward enhanced photocatalytic water oxidation reaction (WOR) and organic pollutants, i.e., tetracycline (TC) and methyl orange (MO). It consists of an oxygen evolution catalyst, i.e., BiVO 4 abbreviated as "B" (monoclinic clinobisvanite phase) composed of tetrahedron and octahedron of VO 4 and BiO 8 , respectively, with threefold coordinated O, fourfold coordinated V, and eightfold coordinated Bi. This phase of B collects distinct attention in WORs Fabricating competent nanoarchitecture photocatalytic systems with desired band edge potential is crucial for effective charge separation that manifolds photocatalytic action. Here, a prototype pristine rational design of allsolid-state coupled confronting Z-scheme (CCZ) system is synthesized by coprecipitation and hydrothermal method. This proof of concept comprises BiVO 4 (B) and MgAl layered double hydroxide (L) as photosystem II (PS-II) whereas CdS quantum dots (QDs, C) as photosystem I (PS-I). CdS QDs trigger H 2 production that subsequently boosts O 2 production at PS-II. Furthermore, this rare CCZ system shows ...

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Section: Introductionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 84%

Rational Design of a Coupled Confronting Z‐Scheme System Toward Photocatalytic Refractory Pollutant Degradation and Water Splitting Reaction

Kandi

Sahoo

Martha

et al. 2019

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…The semiconductor with more negative CB bottom potential can exhibit stronger reduction ability and hence achieve more efficient HER. [ 111,150 ] To date, a large number of semiconductor photocatalysts with negative CB position have been widely investigated in photocatalytic HER, such as ZnO, [ 151 ] TiO 2 , [ 152 ] Cd x Zn 1− x S, [ 153,154 ] Cu 2 O, [ 155 ] g‐C 3 N 4 , [ 156–158 ] and CdS [ 159,160 ] and so on.…”

Section: D Graphene‐based Composites For Photocatalytic Hermentioning

confidence: 99%

3D Graphene‐Based H₂‐Production Photocatalyst and Electrocatalyst

Kuang

Sayed

Fan

et al. 2020

Advanced Energy Materials

253

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Hydrogen (H2) has been deemed as the most promising and valuable alternative to nonrenewable fossil fuels. Photocatalytic and electrocatalytic water splitting are considered to be the most efficient and environmentally friendly approaches for the sustainable H2 evolution reaction (HER). Graphene with a 3D framework has been utilized for the HER due to its unique structure and properties, including its hierarchical network, large specific surface area, diverse pore distribution, outstanding light absorption ability, and excellent electrical conductivity. The large specific surface area and hierarchically porous structure of 3D graphene can not only maximize the exposure of active sites but also promote electron transfer and gas product diffusion. In addition, the free‐standing 3D graphene monolith is easily recycled compared with powder phase support, which can prevent the loss of active catalysts. By making full use of the aforementioned merits, 3D graphene‐based composite materials show great promise as high‐performance catalysts toward photocatalytic and electrocatalytic HER. In this review, recent advances in fabricating 3D graphene‐based composite materials and their applications in both photocatalytic and electrocatalytic HER are summarized and discussed. Furthermore, the current challenges and future vision associated with the design, fabrication, and integration of 3D graphene‐based composite materials toward HER are put forward.

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“…The heterojunction of these dissimilar semiconductors promoted the separation of charge carriers and led to the stability of Ag 3 PO 4 interestingly. Another ternary heterojunction consisting of ZnO, ZnO‐ZnS‐g‐C 3 N 4 , was used for efficient H 2 evolution from water splitting . It was reported that the three component structure is indeed a double Z‐scheme heterojunction, ZnO‐ZnS and ZnS‐g‐C 3 N 4 , so the effective charge separation is attributed to the multistep interfacial charge transfer.…”

Section: Introductionmentioning

confidence: 99%

“…Another ternary heterojunction consisting of ZnO, ZnO-ZnS-g-C 3 N 4 , was used for efficient H 2 evolution from water splitting. 44 It was reported that the three component structure is indeed a double Z-scheme heterojunction, ZnO-ZnS and ZnS-g-C 3 N 4 , so the effective charge separation is attributed to the multistep interfacial charge transfer. α-MoO 3 -WO 3 /CdS is one ternary photocatalyst containing WO 3 and applied for hydrogen production from artificial wastewater.…”

Section: Introductionmentioning

confidence: 99%

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO ₃ ‐Ag ₃ PO ₄ ‐ZnO ternary photocatalysts

2019

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Summary Using statistical mixture design, the best composition of a heterojunction photocatalyst containing ZnO, Ag3PO4, and WO3 was determined to maximize the sunlight driven ammonia removal from aqueous solution via both photocatalysis and adsorption processes. All samples were prepared by coprecipitation and immobilized over perlite granules as floatable support. X‐ray diffraction (XRD), Fourier‐transform infrared (FTIR), field emission scanning electron microscope (FESEM), Brunauer, Emmett, and Teller (BET), ultraviolet–visible (UV‐vis), and photoluminescence (PL) analyses were used to characterize the catalysts. Three responses of ammonia removal by photocatalysis, adsorption, and the total ammonia removal were modeled by special cubic models, and the ANOVA confirmed the significance of them. The maximum ammonia removal, approximately 88%, was obtained by photocatalyst composed of 32.93‐wt% WO3, 41.82‐wt% Ag3PO4, and 25.26‐wt% ZnO. The contribution of photocatalysis and adsorption was estimated to be 72.74% and 14.44%, respectively, indicating the dominance of photocatalysis process. According to kinetic study, the optimum photocatalyst showed the highest apparent rate constant and lowest half‐life time of ammonia removal. The maximum quantum yield of 1.7% was calculated from the best photocatalyst composite at the maximum intensity of visible light received from sunlight. The reuse ability test revealed that the optimum ternary photocatalyst is suitable for wastewater treatments in practical applications.

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Double Z-scheme ZnO/ZnS/g-C3N4 ternary structure for efficient photocatalytic H2 production

Cited by 207 publications

References 83 publications

Rational Design of a Coupled Confronting Z‐Scheme System Toward Photocatalytic Refractory Pollutant Degradation and Water Splitting Reaction

Rational Design of a Coupled Confronting Z‐Scheme System Toward Photocatalytic Refractory Pollutant Degradation and Water Splitting Reaction

3D Graphene‐Based H₂‐Production Photocatalyst and Electrocatalyst

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO ₃ ‐Ag ₃ PO ₄ ‐ZnO ternary photocatalysts

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Double Z-scheme ZnO/ZnS/g-C3N4 ternary structure for efficient photocatalytic H2 production

Cited by 207 publications

References 83 publications

Rational Design of a Coupled Confronting Z‐Scheme System Toward Photocatalytic Refractory Pollutant Degradation and Water Splitting Reaction

Rational Design of a Coupled Confronting Z‐Scheme System Toward Photocatalytic Refractory Pollutant Degradation and Water Splitting Reaction

3D Graphene‐Based H2‐Production Photocatalyst and Electrocatalyst

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO 3 ‐Ag 3 PO 4 ‐ZnO ternary photocatalysts

Contact Info

Product

Resources

About

3D Graphene‐Based H₂‐Production Photocatalyst and Electrocatalyst

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO ₃ ‐Ag ₃ PO ₄ ‐ZnO ternary photocatalysts