Recent developments and challenges in zeolite-based composite photocatalysts for environmental applications

Hu, Geng; Yang, Jian; Duan, Xu; Farnood, Ramin; Yang, Chen; Yang, Jie; Liu, Weizao; Liu, Qingcai

doi:10.1016/j.cej.2021.129209

Cited by 143 publications

(73 citation statements)

References 167 publications

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“…The TiO2-Cp composite with a higher SiO2/Al2O3 ratio than TiO2-Ze has higher hydrophobic properties 11 which can improve the photocatalytic removal of SO2 and CO2 in the presence of humidity 48 .…”

Section: Comparison Of the Composites Performance In The Removal Of So2 And Co2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…During the past decade, PCO is emerged as an environmentally friendly and economically profitable technology for pollutants removal through their converting into harmless compounds or value-added chemicals 10 . Besides, it can be more attractive by using of solar energy as a clean and sustainable source 11 . Among various photocatalysts, TiO2 has received tremendous attention for the photocatalysis process because of availability, non-toxicity, low cost, high photostability, abundance and environmentally friendly nature 12 .…”

Section: Introductionmentioning

confidence: 99%

“…Zeolites, one of the most preferred supports for photocatalystes, are crystalline aluminosilicates that have many desirable properties including uniform-shaped pores, high surface area, thermal stability, hydrophilic /hydrophobic nature and polarizability 2,11 . These properties can improve the potential of pollutants adsorption by TiO2-zeolite composites.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Simultaneous Photocatalytic Removal of SO2 and CO2 Using Powder and Coated Zeolites-Supported TiO2 Under Concentrated Sunlight Irradiation

Razavi

Mirghaffari

Soleimani

2021

Preprint

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Single-step process for simultaneous removal of gaseous pollutants is more advantageous than multi-steps one. In this study, the efficiency of a novel synthetic zeolite (Ze) prepared from stone cutting sludge and a natural zeolite (clinoptilolite, Cp) as the supports of TiO2 photocatalyst were examined for the separate and simultaneous removal of SO2 and CO2 under solar irradiation using a parabolic trough collector (PTC). The composites exhibited a higher efficiency than raw zeolites and TiO2 for the removal of both gases. The maximum removal of SO2 by TiO2-Ze and TiO2-Cp under sunlight was 41.9 % and 56.2 % that enhanced to 53.4 % and 78.8 %, respectively in the presence of CO2. Correspondingly, it was 61.8 % and 68.7 % for single CO2 removal that increased to 74.2 % and 79.0 % in the binary gas stream. This behavior could be due to the enhanced simultaneous SO2 oxidation and CO2 reduction. The performance of coated composite for SO2 was higher than of powder one (54.3% vs. 41.9%) and for CO2 removal was almost close together (58.9% vs. 61.2%). This work promises the application of photocatalytic co-removal of SO2 and CO2 by using synthetic and natural zeolite under solar irradiation.

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Section: Comparison Of the Composites Performance In The Removal Of So2 And Co2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Simultaneous Photocatalytic Removal of SO2 and CO2 Using Powder and Coated Zeolites-Supported TiO2 Under Concentrated Sunlight Irradiation

Razavi

Mirghaffari

Soleimani

2021

Preprint

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“…and can be mixed with CeO2 [18], Fe2O3 [19], SiO2 [20], AgVO3 and Ag3VO4 [21], BiVO4 [22], ZnBi2O4 [23]. Zeolites are also used as supporting materials due to consequently their large surface area and porous structure and, high heat adsorption, maintaining structural stability, acidic form and adjustable acidity that can decrease the electron/hole pair recombination [24]. Photocatalytic processes are generally divided into homogeneous and heterogeneous categories [25] and all photocatalysts are essentially semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Akhoondi

Feleni

Bethi³

et al. 2021

Synth. Sinter.

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Among the ongoing research on photocatalysis under visible-light, it has been shown that doped or hybrid catalysts are more active than a single catalyst alone. However, problems including visible light absorption, a low quantity of energetic sites on surfaces, and rapid recombination of the photo-electron hole pair produced by light have prohibited photocatalysts from being used in a practical and widespread manner. To overcome these problems, synthesis of nanostructure hybrid catalyst using several methods has attracted much attention. Several procedures have been suggested for the preparation of photocatalysts with the desired structure and morphology. Preparation methods similar to partial modification may lead to diverse structures and qualities. In this regard, the development of efficient, low-cost photocatalysts and rapid synthesis is the most important issues that should be considered. This review discusses various methods and mechanisms that work with the modification of vanadium compounds as photocatalysts to progress their photocatalytic efficiency. In addition, the effects of synthesis temperature, solution pH and concentration on the photocatalytic performance are also described in detail.

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Designing of Z‐Scheme MgFe₂O₄/Fe₂O₃ Coupled CoCr₂O₄ Heterojunction with High Photocatalytic Activity for the Removal of Tetracycline Hydrochloride in Wastewater

Gao,

Angadi,

Wang

et al. 2023

Advanced Sustainable Systems

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A simple solution combustion method is used to synthesize spinel type MgFe2O4 (MFO) and CoCr2O4 (CCO) oxides, which are combined with the mechanical mixing method to construct a Z‐scheme MFO/wt%CCO heterojunction, which effectively degraded tetracycline hydrochloride (TC) under simulated sunlight irradiation. Various characterization techniques are used to confirm the phase structure, composition, near‐spherical morphology, ferromagnetic behavior, optical properties, and photocatalytic activity of Z‐scheme MFO/wt%CCO heterojunction. A variety of environmental experimental parameters confirmed that when the optimal initial TC concentration is 50 mg L−1, the catalyst content is 1 g L−1, and pH 13, the degradation percentage of TC by the MFO/75%CCO composites reached 89%. Active species verification experiments showed that the hole (h+), hydroxyl radical (•OH), and superoxide radical (•O2 −) are the main active species in photocatalytic reactions. Based on mass spectrometry, toxicity analysis, and energy band theory, the degradation pathway, toxicity, and photocatalytic mechanism of MFO/75%CCO composites for the degradation of TC are discussed in detail.

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Recent developments and challenges in zeolite-based composite photocatalysts for environmental applications

Cited by 143 publications

References 167 publications

Enhanced Simultaneous Photocatalytic Removal of SO2 and CO2 Using Powder and Coated Zeolites-Supported TiO2 Under Concentrated Sunlight Irradiation

Enhanced Simultaneous Photocatalytic Removal of SO2 and CO2 Using Powder and Coated Zeolites-Supported TiO2 Under Concentrated Sunlight Irradiation

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Designing of Z‐Scheme MgFe₂O₄/Fe₂O₃ Coupled CoCr₂O₄ Heterojunction with High Photocatalytic Activity for the Removal of Tetracycline Hydrochloride in Wastewater

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Recent developments and challenges in zeolite-based composite photocatalysts for environmental applications

Cited by 143 publications

References 167 publications

Enhanced Simultaneous Photocatalytic Removal of SO2 and CO2 Using Powder and Coated Zeolites-Supported TiO2 Under Concentrated Sunlight Irradiation

Enhanced Simultaneous Photocatalytic Removal of SO2 and CO2 Using Powder and Coated Zeolites-Supported TiO2 Under Concentrated Sunlight Irradiation

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

Designing of Z‐Scheme MgFe2O4/Fe2O3 Coupled CoCr2O4 Heterojunction with High Photocatalytic Activity for the Removal of Tetracycline Hydrochloride in Wastewater

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Designing of Z‐Scheme MgFe₂O₄/Fe₂O₃ Coupled CoCr₂O₄ Heterojunction with High Photocatalytic Activity for the Removal of Tetracycline Hydrochloride in Wastewater