Unique surface structure of nano-sized CuInS2 anchored on rGO thin film and its superior photocatalytic activity in real wastewater treatment

Xie, Chunjuan; Lü, Xiaoying; Deng, Fang; Gao, Jiong; Dionysiou, Dionysios D.

doi:10.1016/j.cej.2018.01.030

Cited by 32 publications

(14 citation statements)

References 36 publications

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“…CIS/Mg(OH) 2 composites were performed for the photocatalytic degradation of TCH in the visible light region. The texture structure and naked active sites greatly affect the adsorption capacity and photocatalytic activity [33,51,52]. In contrasted with pure Mg(OH) 2 nanosheets, CuInS 2 nanoparticles loaded onto Mg(OH) 2 induces to the inferior adsorption capacity while it enhances the photocatalytic activity under the same conditions (Table S3).…”

Section: Resultsmentioning

confidence: 99%

“…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. The efficient hole-capture materials are still explored for improving the hole transfer and affording the stability of CuInS 2 .…”

Section: Introductionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

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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“…[28][29][30][31] Therefore, some materials have been reported to couple with CuInS 2 to form heterojunction structures to improve photocatalytic efficiency, such as rGO, CdS, g-C3N4, ZnIn 2 S 4 , and Bi 2 WO 6 . [32][33][34][35][36] CuInS 2 is also a promising candidate as a cocatalyst for ZnO to enhance the separation efficiency of photogenerated electrons and holes on account of their well-matched energy band structure. [37] Hence, it is very interesting to construct a heterojunction photocatalyst by modifying ZnO with CuInS 2 nanoparticles for effectively increasing photocatalysis in visible light illumination.…”

Section: Introductionmentioning

confidence: 99%

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS₂ Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Zhao

Zhou

et al. 2020

ChemPlusChem

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Heterojunction nanocomposites comprising Nickel-doped porous ZnO nanosheets decorated with CuInS 2 nanoparticles (CuInS 2 /NiÀ ZnO) were prepared through a facile two-step process. Compared with pure ZnO nanosheets, the Ni doping modifies the energy band structure and narrows the bandgap from 3.1 eV to 2.4 eV, thus enhancing the absorption of visible light. The production of high-quality CuInS 2 /NiÀ ZnO nanosheets with well-matched band energy alignment facilitates effective charge transportation and separation. Benefiting from these favorable properties, the as-prepared CuInS 2 /NiÀ ZnO hetero-junction nanosheets exhibit higher photocatalytic activity for reduction of Cr (VI) than CuInS 2 and NiÀ ZnO in the presence of visible light. The CuInS 2 /NiÀ ZnO-5 (2 % Ni) composite shows the best photocatalytic activity, which is 7.2 and 5.4 times higher than that of the NiÀ ZnO and CuInS 2 . 98 % of Cr (VI) (50 mg/L) can be reduced within 25 min. Moreover, the activity and structure of the CuInS 2 /NiÀ ZnO catalyst are maintained after five cycles. Combining theoretical calculations and experimental results, a possible photocatalysis mechanism of the CuInS 2 / NiÀ ZnO heterojunction nanocomposites is proposed.[a] S.

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“…Alternatively, many metal sulfide semiconductors have been reported to act as visible‐light‐driven photocatalysts, since these metal sulfide semiconductors have bandgap energies matching well the visible range of solar spectrum . As a result, metal sulfide semiconductors (such as AgSbS 2 , In 2 S 3 , CdS, CuInS 2 , PbS …”

Section: Introductionmentioning

confidence: 99%

Remarkable Improvement in Photocatalytic Performance for Tannery Wastewater Processing via SnS₂ Modified with N‐Doped Carbon Quantum Dots: Synthesis, Characterization, and 4‐Nitrophenol‐Aided Cr(VI) Photoreduction

Wang

Zhu

et al. 2019

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Photocatalytic pathways are proved crucial for the sustainable production of chemicals and fuels required for a pollution‐free planet. Electron–hole recombination is a critical problem that has, so far, limited the efficiency of the most promising photocatalytic materials. Here, the efficacy of the 0D N doped carbon quantum dots (N‐CQDs) is demonstrated in accelerating the charge separation and transfer and thereby boosting the activity of a narrow‐bandgap SnS2 photocatalytic system. N‐CQDs are in situ loaded onto SnS2 nanosheets in forming N‐CQDs/SnS2 composite via an electrostatic interaction under hydrothermal conditions. Cr(VI) photoreduction rate of N‐CQDs/SnS2 is highly enhanced by engineering the loading contents of N‐CQDs, in which the optimal N‐CQDs/SnS2 with 40 mol% N‐CQDs exhibits a remarkable Cr(VI) photoreduction rate of 0.148 min−1, about 5‐time and 148‐time higher than that of SnS2 and N‐CQDs, respectively. Examining the photoexcited charges via zeta potential, X‐ray photoelectron spectroscopy (XPS), surface photovoltage, and electrochemical impedance spectra indicate that the improved Cr(VI) photodegradation rate is linked to the strong electrostatic attraction between N‐CQDs and SnS2 nanosheets in composite, which favors efficient carrier utilization. To further boost the carrier utilization, 4‐nitrophenol is introduced in this photocatalytic system and the efficiency of Cr(VI) photoreduction is further promoted.

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Unique surface structure of nano-sized CuInS2 anchored on rGO thin film and its superior photocatalytic activity in real wastewater treatment

Cited by 32 publications

References 36 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

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS₂ Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Remarkable Improvement in Photocatalytic Performance for Tannery Wastewater Processing via SnS₂ Modified with N‐Doped Carbon Quantum Dots: Synthesis, Characterization, and 4‐Nitrophenol‐Aided Cr(VI) Photoreduction

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Unique surface structure of nano-sized CuInS2 anchored on rGO thin film and its superior photocatalytic activity in real wastewater treatment

Cited by 32 publications

References 36 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

Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS2 Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Remarkable Improvement in Photocatalytic Performance for Tannery Wastewater Processing via SnS2 Modified with N‐Doped Carbon Quantum Dots: Synthesis, Characterization, and 4‐Nitrophenol‐Aided Cr(VI) Photoreduction

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Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS₂ Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

Remarkable Improvement in Photocatalytic Performance for Tannery Wastewater Processing via SnS₂ Modified with N‐Doped Carbon Quantum Dots: Synthesis, Characterization, and 4‐Nitrophenol‐Aided Cr(VI) Photoreduction