Photocatalysis for removal of environmental pollutants and fuel production: a review

Saravanan, A.; Kumar, Ponnusamy Senthil; Vo, Dai‐Viet N.; Yaashikaa, P.R.; Karishma, S.; Jeevanantham, S.; Gayathri, B.; Bharathi, V. Dhivya

doi:10.1007/s10311-020-01077-8

Cited by 184 publications

(58 citation statements)

References 145 publications

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“…Light-activated semiconductor-based photocatalysis represents the most promising green and eco-friendly technique for wastewater treatment (Liu et al 2019a ; López et al 2021 ; Saravanan et al 2020 ). It has received a lot of attention due to its high efficiency, low-cost, and outstanding stability (Peng et al 2021 ; Zhou et al 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

2021

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Antibiotic pollution is a major health issue inducing antibiotic resistance and the inefficiency of actual drugs, thus calling for improved methods to clean water and wastewater. Here we review the recent development of heterojunction photocatalysis and application in degrading tetracycline. We discuss mechanisms for separating photogenerated electron–hole pairs in different heterojunction systems such as traditional, p–n, direct Z-scheme, step-scheme, Schottky, and surface heterojunction. Degradation pathways of tetracycline during photocatalysis are presented. We compare the efficiency of tetracycline removal by various heterojunctions using quantum efficiency, space time yield, and figures of merit. Implications for the treatment of antibiotic-contaminated wastewater are discussed.

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Section: Introductionmentioning

confidence: 99%

Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

2021

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“… 12 Among these, photocatalysis is an effective approach because it converts toxic pollutants into their mineral components. 13 Compared to conventional methods, photocatalysis has many advantages; it is a renewable method, it has high pollutant-degrading efficiency, it does not cause any secondary pollution, and it is cost-effective and environmentally friendly. 14 Materials such as TiO 2 , ZnO, Cu 2 O, g-C 3 N 4 , spinel ferrites, Ag, and their combinations have been effectively employed as photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly of Porphyrin Nanofibers on ZnO Nanoparticles for the Enhanced Photocatalytic Performance for Organic Dye Degradation

Nguyễn

Tran³

et al. 2021

ACS Omega

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Synthesizing novel photocatalysts that can effectively harvest photon energy over a wide range of the solar spectrum for practical applications is vital. Porphyrin-derived nanostructures with properties similar to those of chlorophyll have emerged as promising candidates to meet this requirement. In this study, tetrakis(4-carboxyphenyl) porphyrin (TCPP) nanofibers were formed on the surface of ZnO nanoparticles using a simple self-assembly approach. The obtained ZnO/TCPP nanofiber composites were characterized via scanning electron microscopy, X-ray diffraction analysis, and ultraviolet–visible absorbance and reflectance measurements. The results demonstrated that the ZnO nanoparticles with an average size of approximately 37 nm were well integrated in the TCPP nanofiber matrix. The resultant composite showed photocatalytic activity of ZnO and TCPP nanofibers concomitantly, with band gap energies of 3.12 and 2.43 eV, respectively. The ZnO/TCPP photocatalyst exhibited remarkable photocatalytic performance for RhB degradation with a removal percentage of 97% after 180 min of irradiation under simulated sunlight because of the synergetic activity of ZnO and TCPP nanofibers. The dominant active species participating in the photocatalytic reaction were • O 2 – and OH • , resulting in enhanced charge separation by exciton-coupled charge-transfer processes between the hybrid materials.

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“…The main steps involved in photoresponsive semiconductor degradation are as follows [ 174 ]: (1) when the semiconductor is irradiated by light, the photons whose energy is greater than the semiconductor bandgap excite the electrons in the semiconductor valence band into the conduction band; (2) the semiconductor valence band creates holes, which can oxidize the donor molecules and can further react with water to produce·OH, and act as a strong oxidant to degrade pollutants and (3) the electrons in the conduction band can also react with dissolved oxygen species to form superoxide ions, which promotes the redox reaction. The use of photocatalytic technology to treat wastewater has the advantages of high efficiency, environmental protection and no secondary pollutants [ 175 ], thus providing increased benefits in the degradation of antibiotics and other water pollutants.…”

Section: Electrospun Functional Fiber Membrane For Antibiotic Remomentioning

confidence: 99%

Electrospun Functional Nanofiber Membrane for Antibiotic Removal in Water: Review

et al. 2021

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As a new kind of water pollutant, antibiotics have encouraged researchers to develop new treatment technologies. Electrospun fiber membrane shows excellent benefits in antibiotic removal in water due to its advantages of large specific surface area, high porosity, good connectivity, easy surface modification and new functions. This review introduces the four aspects of electrospinning technology, namely, initial development history, working principle, influencing factors and process types. The preparation technologies of electrospun functional fiber membranes are then summarized. Finally, recent studies about antibiotic removal by electrospun functional fiber membrane are reviewed from three aspects, namely, adsorption, photocatalysis and biodegradation. Future research demand is also recommended.

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Photocatalysis for removal of environmental pollutants and fuel production: a review

Cited by 184 publications

References 145 publications

Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review

Self-Assembly of Porphyrin Nanofibers on ZnO Nanoparticles for the Enhanced Photocatalytic Performance for Organic Dye Degradation

Electrospun Functional Nanofiber Membrane for Antibiotic Removal in Water: Review

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