A visible-light-active BiFeO3/ZnS nanocomposite for photocatalytic conversion of greenhouse gases

Bagvand, Nasim; Sharifnia, Shahram; Karamian, Elham

doi:10.1007/s11814-018-0083-z

Cited by 14 publications

(14 citation statements)

References 26 publications

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“…Also, all heterojunction shows cutoff wavelength between 518 and 595 nm. Band gaps of CdS and BFO are estimated to be 2.4 and 2.08 eV, respectively, by E g = 1240/ λ 43,45 . This is also approvable by Tauc plot method (Figure 6B).…”

Section: Resultsmentioning

confidence: 66%

“…Band gaps of CdS and BFO are estimated to be 2.4 and 2.08 eV, respectively, by E g = 1240/λ. 43,45 This is also approvable by Tauc plot method ( Figure 6B). According the Tauc Equation (1) 33 :…”

Section: Photocatalyst Characterizationmentioning

confidence: 54%

“…KNbO 3 24 and BaTiO 3 28,42 are other perovskite which were coupled with CdS and showed a promoted photocatalytic activity. Perovskite structure of bismuth ferrite (BiFeO 3 ) has been emerged as a visible light active photocatalyst with band gap of 2.0 to 2.7 eV, good chemical stability, photoelectric, and ferromagnetic features at room temperature 15,16,43‐47 . Most of the research done on BFO is related to water treatment and according to our studies, no research has been found related to water splitting by CdS/BFO heterojunction.…”

Section: Introductionmentioning

confidence: 77%

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Enhanced photocatalytic hydrogen evolution from water splitting by Z‐scheme CdS / BiFeO ₃ heterojunction without using sacrificial agent

Kolivand

Sharifnia

2020

Int J Energy Res

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Summary Cadmium sulfide (CdS) is one of the most famous photocatalyst for water splitting because of relevant band edge position. But it has disadvantage such as recombination of charge carrier and photocorrosion in pure water that sacrificial materials must be used to fix it. On the other hand, the use of other photocatalysts alongside it can greatly eliminate these disadvantages. So, in favor of boosting photocatalytic efficiency, it was coupled with BiFeO3 that is a promising visible light active perovskite structure and has ferroelectric properties. The CdS and BiFeO3 powders were synthesized by precipitation and hydrothermal methods, respectively. The pure samples and heterojunctions were investigated by XRD, FESEM, transmission electron microscopy, EDX, UV‐vis, PL, N2 adsorption/desorption isotherms, photocurrent density measurement, electrochemical impedance spectroscopy and Mott‐Schottky analysis to compare the structure, composition, morphology, and optical property before and after modification. The maximum photocatalytic activity, 600.2 μmol/g/h was obtained by heterojunction containing 50 wt% BiFeO3 (CB‐50) from pure water. Also from the experiments results, CB‐50 showed much higher reusability than pure CdS. The enhanced stability and photocatalytic activity of CB‐50 are mainly attributed to charge separation as a result of Z‐scheme charge transfer mechanism as well as the increased light absorption efficiency. In addition to increasing hydrogen production, the ability to use pure water in a closed system without additional materials is other advantage of this photocatalyst.

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Section: Resultsmentioning

confidence: 66%

Section: Photocatalyst Characterizationmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 77%

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Enhanced photocatalytic hydrogen evolution from water splitting by Z‐scheme CdS / BiFeO ₃ heterojunction without using sacrificial agent

Kolivand

Sharifnia

2020

Int J Energy Res

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“…In addition, some composites integrated by ZnS and other semiconductors like ZnO and BiFeO 3 were also exploited to convert CO 2 molecules using CH 4 as a reducing reagent. [ 89,90 ] Besides, the Zn x Cd 1− x S solid solution formed by ZnS and CdS with similar structure was widely applied for photoreduction of CO 2 to carbonaceous fuel owing to many advantages like the feasible preparation process and tunable band structure. [ 91,92 ] Additionally, the hierarchical Zn 0.5 Cd 0.5 S/graphene hybrid has also been constructed for methanol production with a rate of 1.96 µmol g −1 h −1 in terms of photoreduction of CO 2 .…”

Section: Binary Metal Sulfide Photocatalystsmentioning

confidence: 99%

Nanostructured Metal Sulfides: Classification, Modification Strategy, and Solar‐Driven CO₂ Reduction Application

Wang

Lin

Tian

et al. 2020

Adv Funct Materials

241

170

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Solar‐driven conversion of CO2 into high value‐added fuels is expected to be an environmental‐friendly and sustainable approach for relieving the greenhouse gas effect and countering energy crisis. Metal sulfide semiconductors with wide photoresponsive range and favorable band structures are suitable photocatalysts for CO2 photoreduction. This review summarizes the recent progress on metal sulfide semiconductors for photocatalytic CO2 reduction. First, the fundamentals, mechanisms and some principles, like product selectivity, of photocatalytic CO2 reduction are introduced. Then, according to the elemental composition, the metal sulfide photocatalysts applied for CO2 reduction are classified into binary (CdS, ZnS, MoS2, SnS2, Bi2S3, In2S3,Cu2S, NiS/NiS2, and CoS2), ternary (ZnIn2S4, CdIn2S4, CuInS2, Cu3SnS4, and CuGaS2), and quaternary (Cu2ZnSnS4) systems, in which their crystal structures, photochemical characteristics, and photocatalytic CO2 reduction applications are systematically demonstrated. Especially, the diverse modification strategies for improving the activity and product selectivity of photocatalytic CO2 reduction on these metal sulfides are summarized. Finally, the current challenges and future directions for the development of metal sulfide photocatalysts for CO2 reduction are proposed. This review is expected to serve as a powerful reference for exploiting high‐efficiency metal sulfide photocatalysts for CO2 conversion and furthering related mechanism understanding.

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“…In contrast, converting CO 2 into highly value‐added chemical fuels makes more sense. Thus, scientists have transferred their research focus to artificial conversion of CO 2 and developed some major strategies, including conventional thermochemical, 14‐19 electrochemical, 20‐24 and photocatalytic methods 25‐34 . In the last decade, thermochemical conversion of CO 2 has witnessed a significant progress in both product selectivity and productivity (turnover numbers, TONs).…”

Section: Introductionmentioning

confidence: 99%

Engineering approach toward catalyst design for solar photocatalytic CO ₂ reduction: A critical review

Zhang

et al. 2021

Int J Energy Res

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Summary Solar‐driven converting CO2 to value‐added chemicals can not only address the ever‐growing energy crisis, but also simultaneously mitigate CO2 emission. Although much progress has been made in the last decade, it still remains great challenge to achieve the efficient reduction of CO2 with desirable productivity and high product selectivity because CO2 is a thermodynamically stable and inert molecule with large bond energy. Design and synthesis of efficient catalyst play a pivotal role in promoting the activity and selectivity of photocatalytic CO2 reduction. Apart from the active sites engineering, manipulation of the charge separation and light harvesting efficiency or prolonging the lifetime of photogenerated carriers also greatly matters. Consequently, this review summarizes recent advances in photocatalyst design for CO2 conversion from two major aspects, namely active sites engineering and carriers lifespan prolonging. Firstly, we sort out the fundamental principles and merits of artificial photosynthesis in order to provide readers with a current snapshot of this rapidly developed field. Subsequently, various catalyst engineering strategies, including doping, alloying, Z‐scheme structure construction, are discussed in detail. Finally, some challenging issues as well as insights into the future development of artificial photosynthesis are presented.

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A visible-light-active BiFeO3/ZnS nanocomposite for photocatalytic conversion of greenhouse gases

Cited by 14 publications

References 26 publications

Enhanced photocatalytic hydrogen evolution from water splitting by Z‐scheme CdS / BiFeO ₃ heterojunction without using sacrificial agent

Enhanced photocatalytic hydrogen evolution from water splitting by Z‐scheme CdS / BiFeO ₃ heterojunction without using sacrificial agent

Nanostructured Metal Sulfides: Classification, Modification Strategy, and Solar‐Driven CO₂ Reduction Application

Engineering approach toward catalyst design for solar photocatalytic CO ₂ reduction: A critical review

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A visible-light-active BiFeO3/ZnS nanocomposite for photocatalytic conversion of greenhouse gases

Cited by 14 publications

References 26 publications

Enhanced photocatalytic hydrogen evolution from water splitting by Z‐scheme CdS / BiFeO 3 heterojunction without using sacrificial agent

Enhanced photocatalytic hydrogen evolution from water splitting by Z‐scheme CdS / BiFeO 3 heterojunction without using sacrificial agent

Nanostructured Metal Sulfides: Classification, Modification Strategy, and Solar‐Driven CO2 Reduction Application

Engineering approach toward catalyst design for solar photocatalytic CO 2 reduction: A critical review

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Enhanced photocatalytic hydrogen evolution from water splitting by Z‐scheme CdS / BiFeO ₃ heterojunction without using sacrificial agent

Enhanced photocatalytic hydrogen evolution from water splitting by Z‐scheme CdS / BiFeO ₃ heterojunction without using sacrificial agent

Nanostructured Metal Sulfides: Classification, Modification Strategy, and Solar‐Driven CO₂ Reduction Application

Engineering approach toward catalyst design for solar photocatalytic CO ₂ reduction: A critical review