Quaternary semiconductor Cu2ZnSnS4 loaded with MoS2 as a co-catalyst for enhanced photo-catalytic activity

Gogoi, Gaurangi; Arora, Sonia; Natarajan, Vinothkumar; De, Mahuya; Qureshi, Mohammad

doi:10.1039/c5ra03401a

Cited by 38 publications

(20 citation statements)

References 42 publications

(33 reference statements)

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“…As can be seen from Figure S5 for CuInS 2 and ~0.60 mA cm −1 for CdSe. 59 It confirms the presence of excited-state electronic interactions between CZTS and MoS 2 entities in CZTS-MoS 2 composite, leading to the deactivation of excited state of CZTS via non-radiative process involving the charge transfer from CZTS to MoS 2 . We have deposited CuInS 2 QDs in a period of ~2-3 min, while ~30 min was fixed to load CdSe QDs.…”

Section: Wavelength (Nm)supporting

confidence: 61%

Noble metal-free counter electrodes utilizing Cu₂ZnSnS₄loaded with MoS₂for efficient solar cells based on ZnO nanowires co-sensitized with CuInS₂–CdSe quantum dots

et al. 2015

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Noble metal-free counter electrode using a co-catalytic loading of MoS2 nanosheets to Cu2ZnSnS4 microspheres are investigated by means of CuInS2-CdSe quantum dot (QD) co-sensitized solar cells fabricated with single crystalline ZnO nanowires. An ex situ electrophoretic deposition route is employed to deposit QDs onto ZnO nanowires that are epitaxially grown on ZnO seed layered FTO substrates. Hydrothermally grown ZnO nanowires have also established an excellent stability against the bias conditions applied to fabricate the photoanodes of the devcies. The superior photovoltaic performance of CuInS2-CdSe QD co-sensitized cells are compared with that of bare CuInS2 and CdSe counterparts, using current-voltage and incident photon-to-current conversion efficiency measurements. The present study also demonstrates an enhanced performance of the devices fabricated with 1.0 wt % of MoS2 loaded Cu2ZnSnS4 basaed counter electrodes in contrast to bare Cu2ZnSnS4. Hydrothermal loading of MoS2 to Cu2ZnSnS4 generates an electrically interconnected network of Cu2ZnSnS4 microspheres, leading to a facile charge transport in the counter electrode of the devices. MoS2 in its nanosheet form acts as an electrical bridge that interlinks the Cu2ZnSnS4 microspheres. Additionally, a favorable band energy alignment of Cu2ZnSnS4 and MoS2 stimulates the charge transfer dynamics in Cu2ZnSnS4-MoS2 composite. Electron transport and recombination kinetics of the devices are measured using electrochemical impedance spectroscopy.devices revealed an additional benefit of direct 1D electrical

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Section: Wavelength (Nm)supporting

confidence: 61%

Noble metal-free counter electrodes utilizing Cu₂ZnSnS₄loaded with MoS₂for efficient solar cells based on ZnO nanowires co-sensitized with CuInS₂–CdSe quantum dots

et al. 2015

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“…Meanwhile, the noble metal based oxides (e.g., RuO 2 , IrO x ), cost‐acceptable cobalt based species (e.g., CoO x , Co(II), Co(OH) 2 , Nocera Co–Pi), MnO x FeOOH, and NiOOH have been demonstrated to be excellent water‐oxidation co‐catalysts to boost the photocatalytic O 2 evolution over different semiconductors. Similarly, various possible co‐catalyst‐modification strategies, such as noble metals (Pt, Au, Ag), H 3 BO 3 , H 3 PO 4 , MoS 2 , graphene, Cu(II)/Fe(III) clusters, and their hybrids have been extensively employed to improve the O 2 adsorption and reduction on photocatalysts, thus facilitating more efficient capture of the photogenerated electrons for further improved photo‐degradation activities. In addition, the noble metals/alloys (Pt, Au, Ag, Pd, and Cu x Pt y ), earth‐abundant metal compounds (Cu 2 O, NiO x , Ni@NiO), graphene, complex, and their composites have been widely employed as co‐catalysts to improve the photocatalytic activity and selectivity for CO 2 reduction.…”

Section: Fundamental Mechanism Of Heterogeneous Photocatalysismentioning

confidence: 99%

Graphene in Photocatalysis: A Review

Wageh

et al. 2016

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In recent years, heterogeneous photocatalysis has received much research interest because of its powerful potential applications in tackling many important energy and environmental challenges at a global level in an economically sustainable manner. Due to their unique optical, electrical, and physicochemical properties, various 2D graphene nanosheets-supported semiconductor composite photocatalysts have been widely constructed and applied in different photocatalytic fields. In this review, fundamental mechanisms of heterogeneous photocatalysis, including thermodynamic and kinetics requirements, are first systematically summarized. Then, the photocatalysis-related properties of graphene and its derivatives, and design rules and synthesis methods of graphene-based composites are highlighted. Importantly, different design strategies, including doping and sensitization of semiconductors by graphene, improving electrical conductivity of graphene, increasing eloectrocatalytic active sites on graphene, strengthening interface coupling between semiconductors and graphene, fabricating micro/nano architectures, constructing multi-junction nanocomposites, enhancing photostability of semiconductors, and utilizing the synergistic effect of various modification strategies, are thoroughly summarized. The important applications including photocatalytic pollutant degradation, H production, and CO reduction are also addressed. Through reviewing the significant advances on this topic, it may provide new opportunities for designing highly efficient 2D graphene-based photocatalysts for various applications in photocatalysis and other fields, such as solar cells, thermal catalysis, separation, and purification.

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“…Feng Jiang et al reported a multilayer of Pt/In 2 S 3 /CdS/CZTS heterostrucures, where the obtained photocathode showed significant enhancement in terms of stability during photoirradiation for PEC water splitting [ 21 ]. Hybridized 1T-2H MoS 2 was then added to provide higher electrical conductivity and the specific surface area necessary to achieve superior catalytic ability [ 22 , 23 , 24 ]. Importantly, Ag was added in the structure to extend the light absorption of the photocatalyst to the visible light region, which was due to the surface plasmon resonance of Ag NPs, which enabled the photocatalyst to absorb light in the visible spectrum.…”

Section: Introductionmentioning

confidence: 99%

A Composite Photocatalyst Based on Hydrothermally-Synthesized Cu2ZnSnS4 Powders

et al. 2018

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A novel composite photocatalyst based on Cu2ZnSnS4 (CZTS) powders was synthesized and investigated for use as a photocatalyst. CZTS powders were first made using a conventional hydrothermal method and were then used to grow silver nanoparticles hybridized onto the CZTS under various conditions through a microwave-assisted hydrothermal process. After the obtained samples were subsequently mixed with 1T-2H MoS2, the three synthesized component samples were characterized using X-ray diffractometry (XRD), scanning electron microscopy, transmission electron microscopy (FE-SEM, FE-TEM), UV-visible spectroscopy (UV-Vis), Brunauer-Emmet-Teller (BET), photoluminescence spectroscopy (PL), and X-ray photoelectron spectroscopy (XPS). The resulting samples were also used as photocatalysts for the degradation of methylene blue (MB) under a 300 W halogen lamp simulating sunlight with ~5% UV light. The photodegradation ability was greatly enhanced by the addition of Ag and 1T-2H MoS2. Excellent photodegradation of MB was obtained under visible light. The effects of material characteristics on the photodegradation were investigated and discussed.

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Quaternary semiconductor Cu₂ZnSnS₄ loaded with MoS₂ as a co-catalyst for enhanced photo-catalytic activity

Abstract: A composite photocatalyst of Cu2ZnSnS4 (CZTS) containing 1% MoS2 is prepared by hydrothermal reaction using Cu(OAc)2, Zn(NO3)2, and SnCl2 in a H2O/en (9:1) solution to which SC(NH2)2 is added dropwise (autoclave, 180 °C, 24 h).

Cited by 38 publications

References 42 publications

Noble metal-free counter electrodes utilizing Cu₂ZnSnS₄loaded with MoS₂for efficient solar cells based on ZnO nanowires co-sensitized with CuInS₂–CdSe quantum dots

Noble metal-free counter electrodes utilizing Cu₂ZnSnS₄loaded with MoS₂for efficient solar cells based on ZnO nanowires co-sensitized with CuInS₂–CdSe quantum dots

Graphene in Photocatalysis: A Review

A Composite Photocatalyst Based on Hydrothermally-Synthesized Cu2ZnSnS4 Powders

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Quaternary semiconductor Cu2ZnSnS4 loaded with MoS2 as a co-catalyst for enhanced photo-catalytic activity

Abstract: A composite photocatalyst of Cu2ZnSnS4 (CZTS) containing 1% MoS2 is prepared by hydrothermal reaction using Cu(OAc)2, Zn(NO3)2, and SnCl2 in a H2O/en (9:1) solution to which SC(NH2)2 is added dropwise (autoclave, 180 °C, 24 h).

Cited by 38 publications

References 42 publications

Noble metal-free counter electrodes utilizing Cu2ZnSnS4loaded with MoS2for efficient solar cells based on ZnO nanowires co-sensitized with CuInS2–CdSe quantum dots

Noble metal-free counter electrodes utilizing Cu2ZnSnS4loaded with MoS2for efficient solar cells based on ZnO nanowires co-sensitized with CuInS2–CdSe quantum dots

Graphene in Photocatalysis: A Review

A Composite Photocatalyst Based on Hydrothermally-Synthesized Cu2ZnSnS4 Powders

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Quaternary semiconductor Cu₂ZnSnS₄ loaded with MoS₂ as a co-catalyst for enhanced photo-catalytic activity

Noble metal-free counter electrodes utilizing Cu₂ZnSnS₄loaded with MoS₂for efficient solar cells based on ZnO nanowires co-sensitized with CuInS₂–CdSe quantum dots

Noble metal-free counter electrodes utilizing Cu₂ZnSnS₄loaded with MoS₂for efficient solar cells based on ZnO nanowires co-sensitized with CuInS₂–CdSe quantum dots