Hydrophilic surface modification of TiO2 to produce a highly sustainable photocatalyst for outdoor air purification

Jun, Byeong; Saqlain, Shahid; Seo, Hyun Ook; Kim, Young Dok

doi:10.1016/j.apsusc.2019.01.261

Cited by 56 publications

(23 citation statements)

References 44 publications

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“…Because of its high chemical stability and high photocatalytic activity, nano-TiO 2 has great development prospects in the fields of environmental protection [1], such as in photocatalytic disinfection, antibacterial use [2,3], wastewater treatment [4], air purification [5], and so on. Especially in the face of the current difficulty of eliminating volatile organic compound (VOC) pollution in the air, TiO 2 photocatalysis technology has shown unique advantages [6,7]. However, the preparation cost of nano-TiO 2 is high, and the process is difficult to control, meaning that nano-TiO 2 has poor dispersion and a wide particle-size distribution.…”

Section: Introductionmentioning

confidence: 99%

Preparation of TiO2 and Fe-TiO2 with an Impinging Stream-Rotating Packed Bed by the Precipitation Method for the Photodegradation of Gaseous Toluene

et al. 2019

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Nano-TiO2 has always been one of the most important topics in the research of photocatalysts due to its special activity and stability. However, it has always been difficult to obtain nano-TiO2 with high dispersion, a small particle size and high photocatalytic activity. In this paper, nano-TiO2 powder was prepared by combining the high-gravity technique and direct precipitation method in an impinging stream-rotating packed bed (IS-RPB) reactor followed by Fe3+ in-situ doping. TiOSO4 and NH3·H2O solutions were cut into very small liquid microelements by high-speed rotating packing, and the mass transfer and microscopic mixing of the nucleation and growth processes of nano-TiO2 were strengthened in IS-RPB, which was beneficial to the continuous production of high quality nano-TiO2. Pure TiO2 and iron-doped nano-TiO2 (Fe-TiO2) were obtained in IS-RPB and were investigated by means of X-ray diffraction (XRD), Raman, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) and Brunauer–Emmett–Teller (BET) analysis, which found that pure TiO2 had a particle size of about 12.5 nm, good dispersibility and a complete anatase crystal at the rotating speed of packing of 800 rpm and calcination temperature of 500 °C. The addition of Fe3+ did not change the crystalline structure of TiO2. Iron was highly dispersed in TiO2 without the detection of aggregates and was found to exist in a positive trivalent form by XPS. With the increase of iron doping, the photoresponse range of TiO2 to visible light was broadened from 3.06 eV to 2.26 eV. The degradation efficiency of gaseous toluene by Fe-TiO2 under ultraviolet light was higher than that of pure TiO2 and commercial P25 due to Fe3+ effectively suppressing the recombination of TiO2 electrons and holes; the highest efficiency produced by 1.0% Fe-TiO2 was 95.7%.

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Section: Introductionmentioning

confidence: 99%

Preparation of TiO2 and Fe-TiO2 with an Impinging Stream-Rotating Packed Bed by the Precipitation Method for the Photodegradation of Gaseous Toluene

et al. 2019

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“…The EDS mapping images of PTCC sample ( Supplymentary Figure S4 ) exhibit a homogeneous dispersion of oxygen element, indicating that the C=O functional groups were uniformly distributed on the PTCC surface. The abundant carbonyl groups on the surface of PTCC electrode can enhance the hydrophilicity of the sample surface and help to improve the wettability of the electrolyte to the electrode ( Cho et al, 2000 ; Cha et al, 2019 ). Contact angle tests were performed to evaluate the electrolyte wettability of CC and PTCC electrodes.…”

Section: Resultsmentioning

confidence: 99%

Oxygen Plasma Modified Carbon Cloth with C=O Zincophilic Sites as a Stable Host for Zinc Metal Anodes

Jiang

Liu

et al. 2022

Front. Chem.

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Aqueous zinc-ion batteries (ZIBs) are currently receiving widespread attention due to their merits of environmental-friendly properties, high safety, and low cost. However, the absence of stable zinc metal anodes severely restricts their potential applications. In this work, we demonstrate a simple oxygen plasma treatment method to modify the surface state of carbon cloth to construct an ideal substrate for zinc deposition to solve the dendrite growth problem of zinc anodes. The plasma treated carbon cloth (PTCC) electrode has lower nucleation overpotential and uniformly distributed C=O zincophilic nucleation sites, facilitating the uniform nucleation and subsequent homogeneous deposition of zinc. Benefiting from the superior properties of PTCC substrate, the enhanced zinc anodes demonstrate low voltage hysteresis (about 25 mV) and stable zinc plating/stripping behaviors (over 530 h lifespan) at 0.5 mA cm−2 with 15% depth of discharge (DOD). Besides, an extended cycling lifespan of 480 h can also be achieved at very high DOD of 60%. The potential application of the enhanced zinc anode is also confirmed in Zn|V10O24·12H2O full cell. The cells with Zn@PTCC electrode demonstrate remarkable rate capability and excellent cycling stability (95.0% capacity retention after 500 cycles).

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“…Some inorganic substances can kill bacteria and viruses by destroying their cell membranes and the protein content, respectively, or decompose organic pollutants to produce nonpolluted water and carbon dioxide. Owing to their merits, photocatalysts are widely used in various fields, such as air purification, 8,9 water purification, 10 N 2 fixation, [11][12][13] CO 2 reduction 14,15 and hydrogen production. [16][17][18] Thus, there has been extensive research interest in photocatalytic technologies to provide insights for advancements in the field of energy and the environment.…”

Section: Introductionmentioning

confidence: 99%

Advances in Z‐scheme semiconductor photocatalysts for the photoelectrochemical applications: A review

et al. 2022

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Hydrophilic surface modification of TiO2 to produce a highly sustainable photocatalyst for outdoor air purification

Cited by 56 publications

References 44 publications

Preparation of TiO2 and Fe-TiO2 with an Impinging Stream-Rotating Packed Bed by the Precipitation Method for the Photodegradation of Gaseous Toluene

Preparation of TiO2 and Fe-TiO2 with an Impinging Stream-Rotating Packed Bed by the Precipitation Method for the Photodegradation of Gaseous Toluene

Oxygen Plasma Modified Carbon Cloth with C=O Zincophilic Sites as a Stable Host for Zinc Metal Anodes

Advances in Z‐scheme semiconductor photocatalysts for the photoelectrochemical applications: A review

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