Immobilization of TiO2 nanoparticles in polymeric substrates by chemical bonding for multi-cycle photodegradation of organic pollutants

Lei, Ping; Wang, Feng; Gao, Xiao‐Wei; Ding, Yanfen; Zhang, Shimin; Zhao, Jincai; Liu, Shaoren; Yang, Mingshu

doi:10.1016/j.jhazmat.2012.05.029

Cited by 157 publications

(95 citation statements)

References 46 publications

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“…In our case, the thermal treatment changed the color of the PVA support to dark brown. This was not mentioned in the referred study [6], however, Song et al (2014) [14] reported about the browning during the thermal treatment, and the effect was explained by the rearrangement of the polymer structure. The color gradually faded during the irradiation, while the total organic carbon content (TOC) in the solution significantly increased.…”

mentioning

confidence: 86%

“…Based on the work of Lei et al (2012), 0.3 g TiO2 powder was suspended into 10 cm 3 distilled water, then, after sonication, 0.2 g PVA was mixed into this suspension [6]. The suspension containing 60% TiO2 was stirred at 90°C for 1 hour, then at 60°C for two additional hours, while a dense viscous solution was obtained, which was poured into a 7-cm diameter Petri dish, and dried at room temperature.…”

Section: Immobilizationmentioning

confidence: 99%

“…polyethylene sheets [4], PVC [5], polyethylene terephthalate bottle [2], and poly(vinyl alcohol) [6][7][8][9][10][11]. Usually a physical contact is formed between the polymer and the catalyst [2,4], but in some cases they are chemically bound [6].…”

mentioning

confidence: 99%

“…Xiuyun et al (2015) investigated the photocatalytic activity (in the visible range) of a PVA-TiO2 composite film produced by a sol-gel method [10]. Lei et al (2012) immobilized P25 TiO2 with poly(vinyl alcohol) by a casting technique with thermal treatment [6]. The composite catalyst prepared was a white thin film.…”

mentioning

confidence: 99%

“…The color gradually faded during the irradiation, while the total organic carbon content (TOC) in the solution significantly increased. The degradation of the methyl orange model compound was only followed by UV-vis spectroscopy [6], so the dissolved materials (from the polymer) in the solution phase were not detected. The aim of our work was to investigate the changes taking place during the thermal treatment and the effects of them on the stability and efficiency of the composite photocatalyst.…”

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confidence: 99%

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Investigation of a TiO 2 photocatalyst immobilized with poly(vinyl alcohol)

et al. 2017

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Immobilization of TiO2 photocatalyst was realized with application of poly(vinyl alcohol) (PVA). However, these PVA-based foils were too instable to be used for photocatalytic water cleaning. Their stability could be significantly enhanced by a thermal treatment, but this procedure generated various water-soluble derivatives such as aldehydes, ketones, and aromatic species. Photocatalytic pre-treatment of the foils proved to be suitable to remove these products from the surface of the composite. After three subsequent pre-treating cycles of irradiation and rinsing, the PVA-TiO2 foil became applicable for photocatalytic degradation of Triton X-100, a widely used non-ionic detergent. The composite catalyst kept its stability and efficiency even after some cycles of re-usage, while its surface underwent a perceptible, although quantitatively negligible degradation.

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confidence: 86%

Section: Immobilizationmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Investigation of a TiO 2 photocatalyst immobilized with poly(vinyl alcohol)

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Wastewater Treatment

Qureshi

Bakhshpour

Çetin

et al. 2020

Photocatalysts in Advanced Oxidation Processes for Wastewater Treatment

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Hydrogel Nanocomposite Adsorbents and Photocatalysts for Sustainable Water Purification

Kumar

Gusain

Pandey

et al. 2022

Adv Materials Inter

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Anthropogenic actions, environmental catastrophes, urbanization, population growth, and industrialization generate toxic pollutants in water bodies. The most pollutants are heavy metals and metalloids, dyes, volatile organic compounds, pharmaceuticals, pesticides, radionuclides, aromatic hydrocarbons, oils, polycyclic aromatic hydrocarbons, microbes/pathogens, and microplastics that can be in different forms and concentrations. [3][4][5] Globally, approximately 2 million tons of pollutants from agriculture, industrial, and sewage waste are released into water streams, which pose severe health risks and cause the deaths of more than 1400 people every day. [6] Thus, developing efficient, economical, environmentalfriendly, and scalable technologies for the purification of wastewater and seawater is urgently required. To fulfill the shortage of clean water, affordable technologies can be used to transform unconventional water reserves (such as wastewater, rainfall, seawater, and brackish water) into potable water. Recently, numerous water treatment technologies, including coagulation/flocculation, filtration, chemical precipitation, aerobic/anaerobic processing, biological treatment, electrochemically precipitation, advanced oxidation processing, membrane separation, ion-exchange, adsorption, solar/thermal distillation/evaporation, crystallization, and photocatalysis, have emerged to offer practical solutions to water pollution management. [7][8][9][10][11][12][13][14] Among them, adsorption and photocatalysis technologies have garnered significant attention from the research community due to their cost-effectiveness, high performance, Hydrogels have been employed for water purification applications, but their performance and strength are unsatisfactory for widespread adoption. Recently, hydrogel nanocomposites have been proposed to resolve the inherent challenges faced by hydrogels for water treatment. This review comprehensively analyzes hydrogel nanocomposites for water treatment using adsorbent and photocatalysis techniques. The structure, classification, and tunable synthesis methods of hydrogels are explained. Further, how hydrogels can be incorporated with functional nanoparticles (NPs) and can be used as templates/precursors for developing advanced 3D architectures, including the formation of hydrogel nanocomposite beads and 3D printing objects are discussed. Finally, the structure-property relationships of hydrogel nanocomposites are critically reviewed by considering introductory gelation chemistry, such as swelling characteristics, mechanical properties, stimuli-responsiveness, and ionic/electronic conduction. The extensive cross-linking of polymer chains with NPs offers high mass/charge transport, high surface areas, and enhanced polymer-water interactions to achieve high-performing adsorbents and photocatalysts. Several motivating examples of emerging NP-containing hydrogel nanocomposites for use in adsorbents and photocatalysis have been discussed. Such efforts validated the excellent technological pote...

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Immobilization of TiO2 nanoparticles in polymeric substrates by chemical bonding for multi-cycle photodegradation of organic pollutants

Cited by 157 publications

References 46 publications

Investigation of a TiO 2 photocatalyst immobilized with poly(vinyl alcohol)

Investigation of a TiO 2 photocatalyst immobilized with poly(vinyl alcohol)

Wastewater Treatment

Hydrogel Nanocomposite Adsorbents and Photocatalysts for Sustainable Water Purification

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