Enhanced UV–Vis photocatalytic performance of the CuInS 2 /TiO 2 /SnO 2 hetero-structure for air decontamination

Eneşca, Alexandru; Yamaguchi, Yuuichi; Terashima, Chiaki; Fujishima, Akira; Nakata, Kohei; Duţă, Anca

doi:10.1016/j.jcat.2017.02.015

Cited by 36 publications

(14 citation statements)

References 58 publications

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“…Therefore, the key issue of the enhanced stability and recyclability is to transfer the photoexcited holes from the valence band of CuInS 2 . Except for the hole-capture carrier and the sacrificial agents for the suppression of photoinduced corrosion, the heterojunction combined with at least two materials as well as has been confirmed to accelerate the hole transfer and enhance the stability [27,28,29]. For example, CuInS 2 /ZnS-TiO 2 [30], CuInS 2 /g-C 3 N 4 [31], CuInS 2 /Bi 2 WO 6 [32], rGO/CuInS 2 [33], and CuInS 2 /ZnS [34] have proven to expose the sufficient active sites and promote the transfer and separation of charge carriers at the junction interface.…”

Section: Introductionmentioning

confidence: 99%

CuInS2/Mg(OH)2 Nanosheets for the Enhanced Visible-Light Photocatalytic Degradation of Tetracycline

et al. 2019

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CuInS2/Mg(OH)2 (CIS/Mg(OH)2) nanosheets have been prepared for the visible light activated photodegradation of tetracycline hydrochloride (TCH). The introduction of CuInS2 has proven to enhance the photocatalytic activity of Mg(OH)2 nanosheets. It’s ascribed to the enhanced transfer and separation of charge carriers at the junction interface between CuInS2 and Mg(OH)2. The photocatalytic activity of obtained CIS/Mg(OH)2 is greatly affected by CuInS2 content, pH value, and inorganic ions. Among these samples, 2-CIS/Mg(OH)2 exhibits the excellent photocatalytic activity and durability for the visible light driven removal of TCH after five cycle times. Atomic force microscope (AFM) images indicate that the surface roughness of 2-CIS/Mg(OH)2 is intensively influenced in adsorption-photocatalysis process. The •O2− and •OH radicals are vital for the visible light driven photocatalytic activity of 2-CIS/Mg(OH)2 for TCH removal.

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Section: Introductionmentioning

confidence: 99%

CuInS2/Mg(OH)2 Nanosheets for the Enhanced Visible-Light Photocatalytic Degradation of Tetracycline

et al. 2019

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“…A double CuInS 2 /TiO 2 /SnO 2 [ 79 ] type II and p-n heterojunction was employed to evaluate the photocatalytic properties under UV-Vis irradiation. CuInS 2 /TiO 2 /SnO 2 with a porous morphology (25.3 m 2 /g) was obtained by spray pyrolysis deposition.…”

Section: Voc Removal Using Heterostructures/composites/doped Photomentioning

confidence: 99%

Volatile Organic Compounds (VOCs) Removal from Indoor Air by Heterostructures/Composites/Doped Photocatalysts: A Mini-Review

Eneşca

Cazan

2020

Nanomaterials

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The impact of volatile organic compounds (VOCs) on indoor air quality and, furthermore, on human health is still a subject of research investigations considering the large increase in forms of cancer and related diseases. VOCs can be 10 times higher in indoor air concentrations then that of the outdoors, as a consequence of emissions from electronics, building materials and consumer goods. Direct transformation of VOCs in mineralization products seems to be an alternative to reduce indoor air contaminants. The advantage of photocatalysis implementation in indoor air treatment is given by the absence of additional chemicals (such as H2O2) and waste. The present mini-review presents a comparative study on VOCs photocatalytic removal considering the photocatalyst composition, morphology and specific surface. The sheet-like morphology seems to provide a higher number of active sites which may contribute to oxidative reactions. The insertion of materials able to increase light absorbance or to mediate the charge carrier’s transport will have a beneficial impact on the overall photocatalytic efficiency. Additionally, surface chemistry must be considered when developing photocatalysts for certain gas pollutants in order to favor molecule absorbance in the interfacial region. An energy consumption perspective is given based on the light intensity and irradiation period.

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“…Photocatalysis is a chemical process mediated by one or more semiconductors, which under irradiation increase the reduction and oxidation (redox) reactions rate based on charge carriers’ generation [ 31 , 32 ]. When the chemical potential of the electrons from the conduction-band (CB) is between +0.5 and −2.0 V versus the normal hydrogen electrode (NHE), they act as reductants due to the strong oxidizability [ 33 , 34 , 35 ]. The photocatalytic process is characterized by three main steps: (i) electron-hole pair’s generation due to the light absorption, (ii) the diffusion of photoexcited charge carriers on the semiconductor surface and (iii) the redox reaction on the semiconductor surface [ 36 , 37 , 38 ].…”

Section: Heterostructure Mechanisms For Photocatalytic Applicationmentioning

confidence: 99%

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

Eneşca

Andronic

2020

Nanomaterials

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The diversification of pollutants type and concentration in wastewater has underlined the importance of finding new alternatives to traditional treatment methods. Advanced oxidation processes (AOPs), among others, are considered as promising candidate to efficiently remove organic pollutants such as dyes or pharmaceutical active compounds (PhACs). The present minireview resumes several recent achievements on the implementation and optimization of photoactive heterostructures used as photocatalysts for dyes and PhACs removal. The paper is focused on various methods of enhancing the heterostructure photocatalytic properties by optimizing parameters such as synthesis methods, composition, crystallinity, morphology, pollutant concentration and light irradiation.

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Enhanced UV–Vis photocatalytic performance of the CuInS 2 /TiO 2 /SnO 2 hetero-structure for air decontamination

Cited by 36 publications

References 58 publications

CuInS2/Mg(OH)2 Nanosheets for the Enhanced Visible-Light Photocatalytic Degradation of Tetracycline

CuInS2/Mg(OH)2 Nanosheets for the Enhanced Visible-Light Photocatalytic Degradation of Tetracycline

Volatile Organic Compounds (VOCs) Removal from Indoor Air by Heterostructures/Composites/Doped Photocatalysts: A Mini-Review

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

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