CZTS-TiO2 thin film heterostructures for advanced photocatalytic wastewater treatment

Covei, Maria; Perniu, Dana; Bogatu, Cristina; Duţă, Anca

doi:10.1016/j.cattod.2017.12.003

Cited by 42 publications

(12 citation statements)

References 27 publications

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“…The glass substrates were previously cleaned with water and detergent at neutral pH followed by ultrasonication in ethanol and then dried using an air compressor. These deposition parameters were the result of previously optimized data [16,23].…”

Section: Thin Film Depositionmentioning

confidence: 99%

“…ZnCl 2 was dissolved in a 7 : 3 volume ratio of water : ethanol to obtain 50 mL of 0.1 M solution. This precursor solution was sprayed on the glass/-Cu x S substrates heated at 300°C, using 10 spraying sequences, with 45-second break between two consecutive spraying pulses [23] using air as carrier gas. Annealing at 400°C for one hour was further used to increase the crystallinity of the two-layered structure.…”

Section: Cu X S-znomentioning

confidence: 99%

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Optical and Photocatalytic Properties of CuxS/ZnO Composite Thin Films Deposited by Robotic Spray Pyrolysis Deposition

Yepseu

Isac

Nyamen

et al. 2021

Journal of Nanomaterials

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This article reports on VIS-active composite thin films based on zinc oxide (ZnO) and copper sulfide (CuxS) deposited using robotic spray pyrolysis deposition (SPD) for the study of the optical and photocatalytic properties. The first step involves the SPD deposition of a CuxS layer onto the glass substrate at 300°C. The second step consists of the deposition of a ZnO layer onto the CuxS layer to form glass/CuxS-ZnO composites that were further annealed at 400°C. The development of the composite thin films was confirmed by XRD and EDX analyses. The band gap energy ( E g ) of the bare ZnO thin films decreased from 3.15 eV to an activation energy value of 2.8 eV after the deposition of the ZnO thin layer onto the CuxS layer and from 2.8 to 2.08 eV after annealing the CuxS-ZnO composite at 400°C. The UV-VIS irradiation (5.5% of UV, G = 55 W / m 2 ) of a 10 ppm methylene blue solution was used to investigate the photocatalytic properties of the CuxS-ZnO composites. The annealed CuxS-ZnO thin films at 400°C demonstrates better photocatalytic activity compared to CuxS-ZnO composites deposited at 300°C. The enhanced photocatalytic efficiency of the annealed CuxS-ZnO thin films may be the result of the diode structure and the increased crystallinity that prevent the electron-hole recombination.

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Section: Thin Film Depositionmentioning

confidence: 99%

Section: Cu X S-znomentioning

confidence: 99%

Optical and Photocatalytic Properties of CuxS/ZnO Composite Thin Films Deposited by Robotic Spray Pyrolysis Deposition

Yepseu

Isac

Nyamen

et al. 2021

Journal of Nanomaterials

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“…Analysis confirmed the size of particles and uniform crystallinity 2-CP was selected as the target pollutant because this parent compounds and derivatives are being an emerging pollutant and Figure 18. Schematic illustration of charge separation in thin-film heterostructure; visible light passes through the upper layer of TiO 2 and penetrated in lower CZTS thin film electrons gets excited and transferred to the CB of TiO 2 creating and leaving the hole behind; electron in the VB of TiO 2 gets excited after exposure to UV light and hole produced diffuses to the VB of CZTS thus completing the circuit, while the holes at the VBs act as oxidants and electrons in CBs act as reductants to produce oxidizing species [138].…”

Section: Some Tio 2 -Based Heterostructures/nanocompositesmentioning

confidence: 99%

Concepts of Semiconductor Photocatalysis

Rahman¹,

Khan²,

Asiri³

et al. 2019

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He has published more than 250 papers for international and domestic conferences, published several book chapters, and edited ten books. His research work has been largely in the area of photocatalysis, semiconductor, nanoparticles, carbon nanotubes, nanotechnology, electrocatalysis, sensors, ionic liquid, surface chemistry, gold nanoparticles, electrochemistry, instrumental science, nanomaterials, self-assembled monolayers, photochemistry, m-chips, and devices etc.Abdullah Mohamed Asiri: He received his PhD from the University of Wales, College of Cardiff, UK in 1995. He has been the Head of the Chemistry Department at King Abdulaziz University since October 2009 and he is the founder and the Director of the Center of Excellence for Advanced Materials Research (CEAMR). He is a Professor of Organic Photochemistry. His research interests cover color chemistry, synthesis of novel photochromic and thermochromic systems, synthesis of novel coloring matters and dyeing of textiles, materials chemistry, nanochemistry, nanotechnology, polymers,

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“…[18][19][20][21][22] In this regard, there are various reports available on different coupled metal oxides, such as SnO 2 -ZnO, TiO 2 -WO 3 , CZTS-TiO 2 , Bi 2 O 3 / Bi 5 O 7 NO 3 , ZnO-SnO 2 and TiO 2 -SnO 2 . [23][24][25][26][27][28] Recently, heterovalent tin oxide (Sn 3 O 4 ) with various nanomorphs, including nanosheets, nanoowers, nanobelts, nanolayers, etc., has been used as a potential catalyst due to its narrow band gap and chemical stability. [29][30][31][32] The photocatalytic performance of pristine Sn 3 O 4 is believed to be due to the variable oxidation state of Sn: i.e.…”

Section: Introductionmentioning

confidence: 99%

ZnO decorated Sn₃O₄ nanosheet nano-heterostructure: a stable photocatalyst for water splitting and dye degradation under natural sunlight

et al. 2019

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CZTS-TiO2 thin film heterostructures for advanced photocatalytic wastewater treatment

Cited by 42 publications

References 27 publications

Optical and Photocatalytic Properties of CuxS/ZnO Composite Thin Films Deposited by Robotic Spray Pyrolysis Deposition

Optical and Photocatalytic Properties of CuxS/ZnO Composite Thin Films Deposited by Robotic Spray Pyrolysis Deposition

Concepts of Semiconductor Photocatalysis

ZnO decorated Sn₃O₄ nanosheet nano-heterostructure: a stable photocatalyst for water splitting and dye degradation under natural sunlight

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CZTS-TiO2 thin film heterostructures for advanced photocatalytic wastewater treatment

Cited by 42 publications

References 27 publications

Optical and Photocatalytic Properties of CuxS/ZnO Composite Thin Films Deposited by Robotic Spray Pyrolysis Deposition

Optical and Photocatalytic Properties of CuxS/ZnO Composite Thin Films Deposited by Robotic Spray Pyrolysis Deposition

Concepts of Semiconductor Photocatalysis

ZnO decorated Sn3O4 nanosheet nano-heterostructure: a stable photocatalyst for water splitting and dye degradation under natural sunlight

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Product

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About

ZnO decorated Sn₃O₄ nanosheet nano-heterostructure: a stable photocatalyst for water splitting and dye degradation under natural sunlight