Interfacial and electronic band structure optimization for the adsorption and visible-light photocatalytic activity of macroscopic ZnSnO3/graphene aerogel

Dong, Shuying; Xia, Longji; Chen, Xinyi; Cui, Lingfang; Wang, Zhu; Lu, Zhansheng; Sun, Jian; Fan, Maohong

doi:10.1016/j.compositesb.2021.108765

Cited by 77 publications

(18 citation statements)

References 44 publications

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“…The experiment showed that the degradation efficiency of HCQ increased with the passage of time after 120 min, the HCQ degradation efficiency under solar light at large-scale was achieved 70.59%. The results are consistent with the study of Ahmadpour et al [32] .…”

Section: Analysis Of Electron Paramagnetic Resonance (Epr)supporting

confidence: 93%

“…The highest drug degradation was obtained by using a catalyst at pH 3 with 92.37%. It is assumed that the surface of β-Bi 2 O 3 /TiO 2 catalyst is positively charged in acidic solution while negatively charged in alkaline solution [32] . Also, the drug hydroxychloroquine is known as an organic substance that has a negative charge.…”

Section: Analysis Of Electron Paramagnetic Resonance (Epr)mentioning

confidence: 99%

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Synthesis of modified beta bismuth oxide by titanium oxide and highly efficient solar photocatalytic properties on hydroxychloroquine degradation and pathways

Kargar¹,

Bemani²,

Sayadi

et al. 2021

Journal of Photochemistry and Photobiology A: Chemistry

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Section: Analysis Of Electron Paramagnetic Resonance (Epr)supporting

confidence: 93%

Section: Analysis Of Electron Paramagnetic Resonance (Epr)mentioning

confidence: 99%

Synthesis of modified beta bismuth oxide by titanium oxide and highly efficient solar photocatalytic properties on hydroxychloroquine degradation and pathways

Kargar¹,

Bemani²,

Sayadi

et al. 2021

Journal of Photochemistry and Photobiology A: Chemistry

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“…For more advanced and practical applications, photocatalyst material should be highly sensitive towards visible light, which can strongly absorb the visible spectrum from sunlight. Semiconductor-based photocatalysts have been proven to be one of the best ways to decomposed organic waste using light exposure after the outstanding discovery of water splitting by Fujishima in 1972 6 – 15 . The efficiency of semiconductor-based photocatalyst, however, is limited by insufficient light utilization and poor effective surface area.…”

Section: Introductionmentioning

confidence: 99%

Enhanced sunlight driven photocatalytic activity of In2S3 nanosheets functionalized MoS2 nanoflowers heterostructures

Singh

Soni

2021

Sci Rep

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Visible light-sensitive 2D-layered based photocatalytic systems have been proven one of the effective recent trends. We report the preparation of a 2D-layered based In2S3–MoS2 nanohybrid system through a facile hydrothermal method, capable of efficiently degrading of organic contaminants with remarkable efficiency. Transmission electron microscopy (TEM) results inferred the attachment of 2D-layered In2S3 sheets with the MoS2 nanoflakes. Field emission SEM studies with chemical mapping confirm the uniform distribution of Mo, In, and S atoms in the heterostructure, affirming sample uniformity. X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy results confirm the appearance of 2H-MoS2 and β-In2S3 in the grown heterostructures. UV-DRS results reveal a significant improvement in the optical absorbance and significant bandgap narrowing (0.43 eV) in In2S3–MoS2 nanohybrid compared to pristine In2S3 nanosheets in the visible region. The effective bandgap narrowing facilitates the charge transfer between MoS2 and In2S3 and remarkably improves the synergistic effect. Effective bandgap engineering and improved optical absorption of In2S3–MoS2 nanohybrids are favorable for enhancing their charge separation and photocatalytic ability. The photocatalytic decomposition efficiency of the pristine In2S3 nanosheets and In2S3–MoS2 nanohybrids sample is determined by the decomposing of methylene blue and oxytetracycline molecules under natural sunlight. The optimized In2S3–MoS2 nanohybrids can decompose 97.67% of MB and 76.3% of OTC-HCl molecules solution in 8 min and 40 min of exposure of sunlight respectively. 2D-layered In2S3-MoS2 nanohybrids reveal the tremendous remediation performance towards chemical contaminations and pharmaceutical waste, which indicates their applicability in industrial and practical applications.

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“…So far, setup for the reduction of heavy metals and decomposition of organic pollutants using optimized combinations of oxidants, catalyst loading time, and irradiation time have been developed. Mechanistically, photocatalysis is a photo-induced redox reaction that is accelerated in the presence of a photocatalyst due to generation of electrons and hole pairs and ultimate production of highly reactive free radicals ( Dong et al, 2021a ; Dong et al, 2021b ). Photocatalytic activity (PCA) of the photocatalysts can be enhanced by doping with metal and nonmetal ions resulting in the variation in optical properties ( Ata et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

“…Among different materials, glass substrate is a quite promising material to be used as a support because of its distinctive properties, i.e., higher surface area, superior adsorption, reduction in charge recombination, and transparency of glass are retained intact even after coating of the photocatalyst that will not disturb light penetration (photon flux) and rate of photocatalysis ( Amir et al, 2016 ; González-Rodríguez et al, 2020 ). Moreover, the shape and texture of the substrate also affect the available surface area for interaction with the pollutant ( Dong et al, 2021a ; Dong et al, 2021b ). The cost of locally available glass beads is only 0.075 US dollar/12 piece (market price); therefore, utilizing glass beads as a substrate will make this technique both economically and potentially feasible to be applied at large scale.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Solar Photocatalytic Activity of Thermally Stable I:ZnO/Glass Beads for Reduction of Cr(VI) in Tannery Effluent

et al. 2022

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Chromium (VI) in tannery effluent is one of the major environmental concerns for the environmentalists due to the hazardous nature of Cr(VI) ions. To reduce Cr(VI) to Cr(III) as an innocuous moiety, pure and I-doped ZnO was grafted over the etched surface of glass beads by successive ionic layer adsorption and reaction (SILAR). Powdered, pure, and I-doped ZnO scrapped from the surface of glass beads was characterized for crystallinity, morphology, and elemental composition by XRD, SEM, TEM, and EDX. The optical properties of both photocatalysts revealed that owing to optimized iodine doping of ZnO, reduction in the bandgap was observed from 3.3 to 2.9 eV. The crystalline nano-bricks of I:ZnO adhered to glass beads were investigated to have remarkable capability to harvest sunlight in comparison to intrinsic ZnO nanodiscs. The thermal stability of I:ZnO was also found to be much improved due to doping of ZnO. The photocatalytic activities of ZnO/GB and I:ZnO/GB were compared by extent of reduction of Cr(VI) under direct natural sunlight (600–650 KWh/m2). The disappearance of absorbance peaks associated with Cr(VI) after treatment with I:ZnO/GB confirmed higher photocatalytic activity of I:ZnO/GB. The reaction parameters of solar photocatalytic reduction, i.e., initial pH (5–9), initial concentration of Cr(VI) (10–50 ppm), and solar irradiation time (1–5 h) were optimized using response surface methodology. The solar photocatalytic reduction of Cr(VI) to Cr(III) present in real tannery effluent was examined to be 87 and 98%, respectively, by employing ZnO/GB and I:ZnO/GB as solar photocatalysts. The extent of reduction was also confirmed by complexation of Cr(VI) and Cr(III) present in treated and untreated tannery waste with 1, 5-diphenylcarbazide. The results of AAS and UV/vis spectroscopy for the decrease in concentration of Cr also supported the evidence of higher efficiency of I:ZnO/GB for reduction of Cr(VI) in tannery effluent. Reusability of the fabricated photocatalyst was assessed for eight cycles, and magnificent extent of reduction of Cr(VI) indicated its high efficiency. Conclusively, I:ZnO/GB is a potential and cost-effective candidate for Cr(VI) reduction in tannery effluent under natural sunlight.

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Interfacial and electronic band structure optimization for the adsorption and visible-light photocatalytic activity of macroscopic ZnSnO3/graphene aerogel

Cited by 77 publications

References 44 publications

Synthesis of modified beta bismuth oxide by titanium oxide and highly efficient solar photocatalytic properties on hydroxychloroquine degradation and pathways

Synthesis of modified beta bismuth oxide by titanium oxide and highly efficient solar photocatalytic properties on hydroxychloroquine degradation and pathways

Enhanced sunlight driven photocatalytic activity of In2S3 nanosheets functionalized MoS2 nanoflowers heterostructures

Enhanced Solar Photocatalytic Activity of Thermally Stable I:ZnO/Glass Beads for Reduction of Cr(VI) in Tannery Effluent

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