Recent progress of applied TiO2 photoelectrocatalysis for the degradation of organic pollutants in wastewaters

Brillas, Enric; Garcia‐Segura, Sergi

doi:10.1016/j.jece.2023.109635

Cited by 43 publications

(11 citation statements)

References 164 publications

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“…These dopants modify the electronic structure of metal oxide, narrowing its bandgap, and creating new energy levels that trap charge carriers, thereby reducing recombination. Doped metal oxide exhibits improved photocatalytic activity under visible light [77].…”

Section: Doping With Nonmetals or Metalsmentioning

confidence: 99%

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Photocatalytic activity enhancement of nanostructured metal-oxides photocatalyst: a review

Mohd Raub,

Bahru,

Mohamed

et al. 2024

Nanotechnology

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Nanostructured metal oxide semiconductors have emerged as promising nanoscale photocatalysts due to their excellent photosensitivity, chemical stability, non-toxicity, and biocompatibility. Enhancing the photocatalytic activity of metal oxide is critical in improving their efficiency in radical ion production upon optical exposure for various applications. Therefore, this review paper provides an in-depth analysis of the photocatalytic activity of nanostructured metal oxides, including the photocatalytic mechanism, factors affecting the photocatalytic efficiency, and approaches taken to boost the photocatalytic performance through structure or material modifications. This paper also highlights an overview of the recent applications and discusses the recent advancement of ZnO-based nanocomposite as a promising photocatalytic material for environmental remediation, energy conversion, and biomedical applications. 

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Section: Doping With Nonmetals or Metalsmentioning

confidence: 99%

“…TiO 2 and ZnO semiconductors have better pollution degradation efficiency than other metal oxides [31]. When irradiated with ultraviolet light, metal oxide generates highly reactive oxygen species (ROS) that break down contaminants [77].…”

Section: Water Purificationmentioning

confidence: 99%

Photocatalytic activity enhancement of nanostructured metal-oxides photocatalyst: a review

Mohd Raub,

Bahru,

Mohamed

et al. 2024

Nanotechnology

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“…As pointed out above, most works related to insecticides remediation from PS‐ and PMS‐based processes have been made with aqueous mixtures [31–58]. Thermal, catalytic, UV (without and with Fe), and photocatalytic activations, as well as other methods including electrochemical and microwave processes, have been majority developed at laboratory scale.…”

Section: Removal Of Insecticides From Waters By Sulfate Radical‐based...mentioning

confidence: 99%

“…The photocatalytic activation of PS has been reported for the removal of methamidophos with TiO 2 [51], imidacloprid with TiO 2 /Fe 3 O 4 [52], malathion with Fe 3 O 4 /carbon nanotubes (CNTs) [53], and primicarb [54], and a mixture of insecticides [55] with ZnO. Photocatalysis (PC) involves the illumination of a semiconductor immersed into the polluted solution to promote the pass of an electron e CB − of its valence band (VB) to its conduction band (CB) giving a hole h VB + in the VB by reaction () [51, 56]. The energy of the incident photons has to be higher or equal to the band gap energy ( E bg ) of the semiconductor to separate the e CB − /h VB + pair.…”

Section: Removal Of Insecticides From Waters By Sulfate Radical‐based...mentioning

confidence: 99%

Removal of insecticides from waters and soils by sulfate radical‐based advanced oxidation processes

Brillas

2023

Applied Research

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Insecticides are toxic compounds widely used to prevent, destroy, and control any insect pests. A larger food production with increasing agricultural activity has been ensured from their application to farmlands. Insecticides have been detected in waters and soils being dangerous for living beings. Due to their high biorecalcitrance and stability at ambient conditions, they cannot be destroyed in conventional wastewater treatment plants (WWTPs) and powerful advanced oxidation processes (AOPs) are being developed for their removal. This review presents a detailed and critical analysis over the application of sulfate radical‐based AOPs to the remediation of waters and soils polluted with insecticides. Persulfate (PS) and peroxymonosulfate (PMS) are used as parent oxidants but they need to be activated to produce strong effective oxidizing radicals such as sulfate radical (SO4●−) and hydroxyl radical (●OH). Alkaline, thermal, catalytic, UV, UV with Fe, photocatalytic, and other methods applied as activators of PS and/or PMS are separately analyzed in waters and soils. For each hybrid procedure, the fundamentals are briefly detailed and the best results reported in the literature are summarized and discussed. The effect of operating parameters on the oxidation power of treatments in pure water, real waters, WWTPs effluents, and contaminated soils are remarked to show the viability of sulfate radical‐based AOPs for insecticides removal from waters and soils. The effect of added common anions and natural organic matter, the detection of oxidizing radicals by selective scavengers and electron paramagnetic resonance, and the identification of the generated by‐products in waters are described. Comparisons with analogous treatments with H2O2 and Fenton are discussed as well. Further research efforts should consider a deeper study of PS‐ and/or PMS‐based processes of insecticides not only in actual agricultural and real wastewaters, but also in many soils to confirm their possible suitability at the industrial level.

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“…Traditionally, metal oxides (MOx) have been deposited on transparent electrodes/substrates and used as photoanodes and photocathodes, due to their tunable optoelectronic properties and Earth abundance. Some of the most commonly used metals for MOx are Fe, Zn, Ti, Sn, Cu, Mo or W, which can drive different reactions, such as hydrogen production via water splitting, 94 CO2 reduction reaction, 95 pollutant degradation reaction, 96 or anti-microbial applications. 97 o Metal halide perovskite Metal halide semiconductor materials presenting the perovskite-type crystal structure (ABX3), especially those that Pb sits in the B site and I, Br, or Cl in the X site (Figure 1.12), have attracted increasing attention in the last years due to their high performance in photovoltaic devices, 98 lasing 99 and light emission [100][101] .…”

Section: Semiconductor Materialsmentioning

confidence: 99%

(Photo)electrochemical approaches for renewable energy storage into high-added value chemicals

Fernandez-Climent

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Als meus pares, Pedro i Susivi I hereby declare that except when specific reference is made, the material presented in this thesis is the result of my own work. vii List of publications  García-Tecedor, M.; Cardenas-Morcoso, D.; Fernández-Climent, R.; & Giménez, S. ( 2019). The role of underlayers and overlayers in thin film BiVO4 photoanodes for solar water splitting. Advanced Materials Interfaces, 6(15), 1900299.

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Recent progress of applied TiO2 photoelectrocatalysis for the degradation of organic pollutants in wastewaters

Cited by 43 publications

References 164 publications

Photocatalytic activity enhancement of nanostructured metal-oxides photocatalyst: a review

Photocatalytic activity enhancement of nanostructured metal-oxides photocatalyst: a review

Removal of insecticides from waters and soils by sulfate radical‐based advanced oxidation processes

(Photo)electrochemical approaches for renewable energy storage into high-added value chemicals

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