Recent advances in floating TiO2-based photocatalysts for environmental application

Xing, Zipeng; Zhang, Jiaqi; Cui, Jiayi; Yin, Jiuli; Zhao, Tianyu; Kuang, Junyan; Xiu, Ziyuan; Wan, Nian‐Feng; Zhou, Wei

doi:10.1016/j.apcatb.2017.12.005

Cited by 495 publications

(161 citation statements)

References 105 publications

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“…Only few studies reported the photocatalytic degradation of pollutants by floating devices under solar light [21]. Although comparisons are difficult to draw due to the different experimental conditions, the presently reported floating device shows promising performance with respect to previous reports as several literature studies obtain similar degradation rates using much larger TiO 2 actual contents [20,46,47].…”

Section: Photocatalytic Activitymentioning

confidence: 62%

“…However, an unresolved issue for nano/microcomposites is represented by their poor photochemical, thermal and mechanical stability. As a matter of fact, the mechanical stability of composite devices is limited by the inherent low compatibility between the polymer and the oxide layers [21]. Moreover, the device stability under prolonged irradiation depends on the photostability of the polymer component as well as on the possible occurrence of polymer degradation due to the TiO 2 photocatalytic activity [22].…”

Section: Introductionmentioning

confidence: 99%

“…Most of the literature uses commercial polymers as substrates for the oxide deposition due to their flexibility, availability and lower cost [21]. However, the poor thermal stability of common commercial polymers (e.g., polyesters and polyacrylates) severely restricts the range of available stabilization treatments that can be used to improve the oxide layer adhesion.…”

Section: Introductionmentioning

confidence: 99%

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TiO2-SiO2-PMMA Terpolymer Floating Device for the Photocatalytic Remediation of Water and Gas Phase Pollutants

et al. 2018

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Floating photocatalytic devices are highly sought-after as they represent good candidates for practical application in pollutant remediation of large water basins. Here, we present a multilayer floating device for the photocatalytic remediation of contaminants present in water as well as of volatile species close to the water surface. The device was prepared on a novel tailored ter-polymer substrate based on methylmethacrylate, α-methylstyrene and perfluoroctyl methacrylate. The ad hoc synthesized support presents optimal characteristics in terms of buoyancy, transparency, gas permeability, mechanical, UV and thermal stability. The adhesion of the TiO 2 top layer was favoured by the adopted casting procedure, followed by a corona pre-treatment and by the deposition of an intermediate SiO 2 layer, the latter aimed also at protecting the polymer support from photocatalytic oxidation. The device was characterized by contact angle measurement, UV-vis transmittance and scanning electron microscopy. The final device was tested for the photocatalytic degradation of an emerging water pollutant as well as of vapors of a model volatile organic compound. Relevant activity was observed also under simulated solar irradiation and the device showed good stability and recyclability, prospecting its use for the photocatalytic degradation of pollutants in large water basins.

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Section: Photocatalytic Activitymentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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TiO2-SiO2-PMMA Terpolymer Floating Device for the Photocatalytic Remediation of Water and Gas Phase Pollutants

et al. 2018

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“…Fotokatalis semikonduktor merupakan teknologi yang menjanjikan untuk pemurnian lingkungan khususnya limbah cair melalui degradasi polutan dengan memanfaatkan energi matahari menjadi energi kimia [1,15]. Titanium oksida (TiO2) merupakan salah satu material semikonduktor yang telah banyak digunakan pada sistem ini karena sifat fotolistrik yang sangat baik, tidak beracun, biaya rendah dan stabilitas tinggi [6,12,13,17]. Namun, laju rekombinasi pasangan lubang elektron pembawa muatan yang begitu cepat dan rentang respon cahaya yang sempit, menjadi masalah serius yang menghambat proses fotokatalitik dalam aplikasi praktisnya [11,8]…”

Section: Pendahuluanunclassified

Rekayasa Nano Komposit Titanium Oskida Sebagai Katalis Pereduksi Zat Warna Tekstil

et al. 2019

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The core shell structure of TiO2@SiO2@ferrite(Ni-Cu-Zn) as composite nanoparticles for magnetic photocatalyst were successfully prepared in this study. These particles were synthesized continually by the sol-gel method and they are tested for their performance using MB dye solution. The magnetic core particles used in the synthesis were (Ni-Cu-Zn) ferrite with size of 20-60 nm, while SiO2 and TiO2 layers were formed using tetraethoxysilane and tetrabutly titanate. Some characterizations and testinghavecarried out to investigate the crystal structure, magnetic properties, surface conditions and performance of these particles. The results show that the anatase crystal structure of TiO2 was obtained on the outer shell of the particle, while the magnetization value and surface area were achieved at 4.74 emu/g and 126,831 m 2 /g, respectively. The nanoparticles of composite size were obtained about 10 to 40 nm with the shell thickness up to 4 nm. The performance results of photodegradation was quite good for reducing MB dye up to 63.37%. ABSTRAK Partikel nano komposit berstruktur kulit titania (TiO2) atau TiO2@SiO2@ferit(Ni-Cu-Zn) sebagai bahan fotokatalis magnetik sukses direkayasa pada pada penelitian ini. Partikel ini disintesis secara bertahap dengan metode sol-gel dan kemudian diuji performanya menggunakan zat pewarna MB. Partikel magnetik dasar yang digunakan adalah ferit (Ni-Cu-Zn), sedangkan lapisan SiO2 dan TiO2 dibentuk dari tetraethoxysilane dan tetrabutly titanate. Beberapa karakterisasi dan pengujian dilakukan untuk menyelidiki struktur kristal, sifat magnet, kondisi permukaaan dan performa dari partikel ini. Hasil pengujian menunjukkan bahwa struktur kristal anatase TiO2 diperoleh pada permukaan terluar patikel, sementara nilai magnetisasi dan luas permukaan partikel didapatkan pada 4.74 emu/g dan 126.831 m 2 /g. Ukuran partikel nano komposit berstruktur kulit titania diperoleh antara 10 -40 nm dengan ketebalan lapisan hingga 4 nm. Hasil unjuk kerja fotokatalis partikel ini menunjukkan bahwa performa fotodegradasi cukup baik dalam mereduksi zat pewarna MB hingga 63.37 %.

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“…One‐dimensional titanium dioxide nanotubes have become a popular research topic in the field of chemistry and materials due to their large specific surface area, high mechanical strength, and favorable biocompatibility . Self‐doped TiO 2 nanotube array (DTNA) electrodes prepared though anodic oxidation combined with cathodic reduction have the advantages of high arrangement regularity and a large specific surface area. Because DTNAs are prepared directly on a titanium substrate, the shape and crystal structure of the nanotubes can be easily controlled, thus allowing for effective assembly, shortening the process and saving resources.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a self‐doped TiO₂ nanotube array electrode for electrochemical degradation of methyl orange

Wei

Wang

2019

J Chinese Chemical Soc

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Self‐doped TiO2 nanotube array (DTNA) electrodes were fabricated through anodic oxidation combined with cathodic reduction. The morphology and structural features of pristine TiO2 nanotube arrays and DTNA electrodes were studied through scanning electron microscopy, X‐ray diffractometry, and X‐ray photoelectron spectroscopy. An accelerated life test was used to test the electrode service lifetime and thus the electrode's stability. The service lifetime of the DTNA electrode prepared at constant 40 V for 6 hr was approximately 338.7 hr at constant 1 mA/cm2 in a 1 M NaClO4 solution. Methyl orange (MO) was employed as the degradation probe for measuring electrochemical oxidation performance. The color removal rate of 200 mg/L MO of the DTNA electrode (85.2% at 1 mA/cm2) was greater than that of the Ti/IrO2 electrode (31.1% at 1 mA/cm2). The larger the surface area of the DTNA electrode is, the more conductive the electrode is for the degradation of organic substances. Organic degradation on the DTNA electrode occurred primarily through an indirect pathway (producing [∙OH]).

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Recent advances in floating TiO2-based photocatalysts for environmental application

Cited by 495 publications

References 105 publications

TiO2-SiO2-PMMA Terpolymer Floating Device for the Photocatalytic Remediation of Water and Gas Phase Pollutants

TiO2-SiO2-PMMA Terpolymer Floating Device for the Photocatalytic Remediation of Water and Gas Phase Pollutants

Rekayasa Nano Komposit Titanium Oskida Sebagai Katalis Pereduksi Zat Warna Tekstil

Fabrication of a self‐doped TiO₂ nanotube array electrode for electrochemical degradation of methyl orange

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Recent advances in floating TiO2-based photocatalysts for environmental application

Cited by 495 publications

References 105 publications

TiO2-SiO2-PMMA Terpolymer Floating Device for the Photocatalytic Remediation of Water and Gas Phase Pollutants

TiO2-SiO2-PMMA Terpolymer Floating Device for the Photocatalytic Remediation of Water and Gas Phase Pollutants

Rekayasa Nano Komposit Titanium Oskida Sebagai Katalis Pereduksi Zat Warna Tekstil

Fabrication of a self‐doped TiO2 nanotube array electrode for electrochemical degradation of methyl orange

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Fabrication of a self‐doped TiO₂ nanotube array electrode for electrochemical degradation of methyl orange