Synthesis and characterization of TiO2/ZnO heterostructural composite for ultraviolet photocatalytic degrading DOM in landfill leachate

Li, Bicai; Yuan, Donghai; Gao, Caiyun; Zhang, Hong; Li, Zhicheng

doi:10.1007/s11356-022-21758-x

Cited by 11 publications

(2 citation statements)

References 32 publications

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“…For organic pollutants, photocatalytic degradation shows the lowest energy consumption and is an effective method for sewage purification. Some semiconductors, including TiO 2 , ZnO, WO 3 , SnO 2 , etc., show decent photocatalytic performance and are utilized in the photocatalytic degradation of organics in sewage and polluted air. − Among these, ZnO, a wide band-gap semiconductor, has gained extensive focus in the field of organic pollutant removal. However, its wide band gap and high electron–hole recombination rate limit its photocatalytic efficiency .…”

Section: Introductionmentioning

confidence: 99%

PVDF Nanofiber Modified with ZnO Nanowires/Polydopamine for the Treatment of Sewage Containing Heavy Metals, Organic Dyes, and Bacteria

Dong,

Zhao,

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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Section: Introductionmentioning

confidence: 99%

PVDF Nanofiber Modified with ZnO Nanowires/Polydopamine for the Treatment of Sewage Containing Heavy Metals, Organic Dyes, and Bacteria

Dong,

Zhao,

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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“…Removal of organic matter by photocatalysis with TiO2 or ZnO has been carried out for more than two decades. Some studies combined semiconductors for the photodegradation of synthesized humic acids (Wang et al, 2013;Zulfikar et al, 2020;Turkten and Bekbölet, 2020) or dissolved organic matter (Li et al, 2022) under solar irradiation or artificial light. Bah et al (2023) found that there are few studies on photocatalysis with sunlight as the irradiation source.…”

Section: Introductionmentioning

confidence: 99%

Study of the effectiveness of a ZnO–TiO2 formulation in the degradation of humic substances in mature leachate by solar photocatalysis Brazil

Nohara,

Izário Filho,

Siqueira

et al. 2023

Rev. ambiente água

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Treatment of landfill leachate is an important environmental issue, especially in developing countries such as Brazil. Advanced oxidation processes (AOPs) have been considered interesting treatment alternatives. In this study, ZnO–TiO2 mixtures were incorporated into a paint polymer matrix and fixed onto supports. Paints were applied by overlapping coat layers on plates, resulting in high film thickness (600 ± 80 µm). Treatment of mature leachate by an AOP was conducted in a plug flow reactor connected to a stirred tank under solar irradiation. The objective was to evaluate the degradation of humic acid (HA) and fulvic acid + humins (FAH). The highest HA and FAH removal efficiencies were 62% ± 4.9% and 16% ± 4.2%, respectively. The kinetic model provided a coefficient of determination (R2) of 0.974. Rate constants for HA and FAH removal were 2.96 and 1.03 × 10−3 min−1, respectively. Statistical models for HA and FAH degradation had R2 values of 0.96 and 0.99, respectively. Both approaches indicated that HA degradation is greater at acidic pH and higher TiO2 concentrations. FAH degradation was favored by acidic pH and higher ZnO concentrations. Statistical models showed the same mean difference in conversion between replicate runs of HA and FAH, suggesting a uniform diffusion of fractions through catalysts. Keywords: heterogeneous photocatalysis, humic and fulvic acid, landfill leachate treatment, titanium dioxide, zinc oxide.

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Photocatalytic degradation of dissolved organic matter in landfill leachate by heterostructural ZnO-rGO composite catalysts

Lin

et al. 2023

Environ Sci Pollut Res

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Synthesis and characterization of TiO2/ZnO heterostructural composite for ultraviolet photocatalytic degrading DOM in landfill leachate

Cited by 11 publications

References 32 publications

PVDF Nanofiber Modified with ZnO Nanowires/Polydopamine for the Treatment of Sewage Containing Heavy Metals, Organic Dyes, and Bacteria

PVDF Nanofiber Modified with ZnO Nanowires/Polydopamine for the Treatment of Sewage Containing Heavy Metals, Organic Dyes, and Bacteria

Study of the effectiveness of a ZnO–TiO2 formulation in the degradation of humic substances in mature leachate by solar photocatalysis Brazil

Photocatalytic degradation of dissolved organic matter in landfill leachate by heterostructural ZnO-rGO composite catalysts

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