Influence of precursors and formation of heterostructures towards the enhanced photocatalytic activity of ZnO thin films deposited by spray pyrolysis

Deepthi, V.; Sebastian, Anju; Vidhya, B.

doi:10.1007/s10854-022-09055-2

Cited by 2 publications

(2 citation statements)

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“…Deepthi et al reported that ZnO/SnSe films prepared by spray pyrolysis had a degradation rate of 55% for rhodamine B (RhB) after 150 min of visible light irradiation. 20 Govindan et al reported a SnSe nanomaterial synthesized by the one-pot microwave method, in which 79% of RhB was degraded after 90 min of visible light irradiation. 21 Another study reported SnSe nanosheets prepared by a simple hydrothermal method and investigated the photocatalytic performance of the sample by degrading MB.…”

Section: Introductionmentioning

confidence: 99%

“…Among others, the narrow band gap and the defective energy levels generated in its own structure of SnSe means that it can capture a wide range of visible light, , making up for the shortcomings of existing commercially available photocatalytic materials. Deepthi et al reported that ZnO/SnSe films prepared by spray pyrolysis had a degradation rate of 55% for rhodamine B (RhB) after 150 min of visible light irradiation . Govindan et al reported a SnSe nanomaterial synthesized by the one-pot microwave method, in which 79% of RhB was degraded after 90 min of visible light irradiation .…”

Section: Introductionmentioning

confidence: 99%

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Highly Enhanced Photocatalytic Properties of Tin Selenide Nanopowders by Microstructure Modulation

Ma,

Yang,

Feng

et al. 2023

ACS Appl. Nano Mater.

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Wide-band-gap semiconductor photocatalytic materials are limited in their application because they can only absorb ultraviolet light, while tin selenide (SnSe) with a narrow band gap is a promising photocatalyst that responds to visible and near-infrared light. Herein, pure SnSe nanopowders with a narrow band gap were synthesized by regulating the reaction temperature in the process of hydrothermal reaction. The powder samples showed self-assembled micrometer flowers of nanosheets and nanorods, which facilitated the degradation of contaminant dyes by increasing the length of the light path. The properties of the photocatalytic degradation of rhodamine B (RhB) by the SnSe powders synthesized at a temperature gradient of 20 °C from 80 to 120 °C were investigated. The results show that the degradation rate of RhB reached 98.2% in 60 min by pure SnSe powder prepared at 100 °C (SnSe-100), which was attributed to the "light trapping effect" created by its unique and intact micron-flower structure. In addition, degradation experiments were also carried out on common organic dyes, in which the decomposition rate of methylene blue reached 92.86%. This can be applied to the treatment of water pollution and provides a quick solution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Enhanced Photocatalytic Properties of Tin Selenide Nanopowders by Microstructure Modulation

Ma,

Yang,

Feng

et al. 2023

ACS Appl. Nano Mater.

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The effects of annealing temperature on the thickness, morphology, band gap energy, and photocatalytic performance of ZIF-8-derived ZnO/TiO2 thin films

İloğlu,

Yurtsever

2024

J Mater Sci: Mater Electron

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Multi-oxide photocatalytic materials derived from metal organic frameworks (MOFs) are attracting widespread attention in recent years. The heterostructure originating from oxide–oxide junctions and nonmetal doping due to the combustion of organics from MOFs provide desirable properties to the photocatalytic material. In this study, the effects of annealing temperature on the material properties and photocatalytic activity of ZIF-8-derived ZnO/TiO2 thin films were investigated. XRD, XPS, and FTIR analyses confirmed the oxidation of ZIF-8 to ZnO and SEM analysis revealed the formation of a porous structure at the annealing temperature of 500 °C. UV–Vis analysis indicated that the band gap energy decreased from 3.23 to 2.04 eV with increasing annealing temperature. Photocatalytic methylene blue degradation experiments showed that the thin film annealed at 500 °C had higher activity than the films annealed at lower temperatures. The thin film annealed at 500 °C had more than two times the dye degradation efficiency of the film annealed at 400 °C (72% and 33%, respectively). This film was also active in the photocatalytic degradation of caffeic acid which is a colorless pollutant. The high photocatalytic activity of the thin film annealed at higher temperature was attributed to its narrower band gap energy, higher porosity, and more efficient electron–hole separation, which are due to the presence of heterostructure, nonmetal doping, and deficient zones formed by the oxidation of imidazole rings.

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Influence of precursors and formation of heterostructures towards the enhanced photocatalytic activity of ZnO thin films deposited by spray pyrolysis

Cited by 2 publications

References 51 publications

Highly Enhanced Photocatalytic Properties of Tin Selenide Nanopowders by Microstructure Modulation

Highly Enhanced Photocatalytic Properties of Tin Selenide Nanopowders by Microstructure Modulation

The effects of annealing temperature on the thickness, morphology, band gap energy, and photocatalytic performance of ZIF-8-derived ZnO/TiO2 thin films

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