Excellent photocatalytic degradation of tetracycline over black anatase-TiO2 under visible light

Wu, Suqing; Li, Xueyan; Tian, Yanqin; Lin, Yan; Hu, Yun Hang

doi:10.1016/j.cej.2020.126747

Cited by 233 publications

(78 citation statements)

References 44 publications

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“…TiO 2 is known for its bright white color, which is the least absorption-effective color. Various techniques were proposed to generate color of TiO 2 and thus increase the absorption of light, such as metal co-catalyst decoration and the treatment of TiO 2 with gases such as hydrogen [12], nitrogen [13], and argon [14] under high-or low-pressure environments. Among them, inducing defects in TiO 2 crystal structure has been found to be an effective method to increase absorption [11].…”

Section: Introductionmentioning

confidence: 99%

Defective Grey TiO2 with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis

et al. 2021

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The novelty of this work was to prepare a series of defect-rich colored TiO2 nanostructures, using a peroxo solvothermal-assisted, high-pressure nitrogenation method. Among these solids, certain TiO2 materials possessed a trace quantity of anatase–rutile heterojunctions, which are beneficial in obtaining high reaction rates in photocatalytic reactions. In addition, high surface area (above 100 m2/g), even when utilizing a high calcination temperature (500 °C), and absorption of light at higher wavelengths, due to the grey color of the synthesized titania, were observed as an added advantage for photocatalytic hydroxyl radical formation. In this work, we adopted a photoluminescent probe method to monitor the temporal evolution of hydroxyl radicals. As a result, promising hydroxyl radical formations were observed for all the colored samples synthesized at 400 and 500 °C, irrespective of the duration of calcination.

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Section: Introductionmentioning

confidence: 99%

Defective Grey TiO2 with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis

et al. 2021

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“…Nowadays, the photooxidation of organic pollutants based on TiO 2 nanomaterials is still gain huge attention. Several recent studies have shown the effective role of TiO 2 in oxidizing and mineralizing a wide range of hazardous organic contaminants [118,119], such as alcohol [120,121], organic acids [122], aromatic hydrocarbons [104], phenols [123], dyes [124], pharmaceuticals [125,126], and pesticides [126]. The photocatalytic oxidation of organic pollutants proceeds either by the direct attack of the photogenerated holes or via the attack of the highly reactive hydroxyl radicals generated at the surface of the photocatalyst [110].…”

Section: Methods Of Treatmentmentioning

confidence: 99%

“…Therefore, the development of novel and simple processes is desired to remove these compounds from the environment, according to the viewpoint of "green chemistry" [239]. Several investigations of photooxidation of such pollutants have been carried out by using TiO 2 and Pt/TiO 2 photocatalysts in the presence of molecular oxygen [113,117,124,[240][241][242][243][244][245][246].…”

Section: Photocatalytic Reforming Of Aromatic Compoundsmentioning

confidence: 99%

TiO2 Photocatalysis for the Transformation of Aromatic Water Pollutants into Fuels

et al. 2021

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The growing world energy consumption, with reliance on conventional energy sources and the associated environmental pollution, are considered the most serious threats faced by mankind. Heterogeneous photocatalysis has become one of the most frequently investigated technologies, due to its dual functionality, i.e., environmental remediation and converting solar energy into chemical energy, especially molecular hydrogen. H2 burns cleanly and has the highest gravimetric gross calorific value among all fuels. However, the use of a suitable electron donor, in what so-called “photocatalytic reforming”, is required to achieve acceptable efficiency. This oxidation half-reaction can be exploited to oxidize the dissolved organic pollutants, thus, simultaneously improving the water quality. Such pollutants would replace other potentially costly electron donors, achieving the dual-functionality purpose. Since the aromatic compounds are widely spread in the environment, they are considered attractive targets to apply this technology. In this review, different aspects are highlighted, including the employing of different polymorphs of pristine titanium dioxide as photocatalysts in the photocatalytic processes, also improving the photocatalytic activity of TiO2 by loading different types of metal co-catalysts, especially platinum nanoparticles, and comparing the effect of various loading methods of such metal co-catalysts. Finally, the photocatalytic reforming of aromatic compounds employing TiO2-based semiconductors is presented.

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“…Carboxyl group was detached from the ringopening product (m/z 270) and then the intermediate product (m/z 140) was formed from the demethylation reaction (Pang et al, 2018;Li Z. et al, 2019.). Finally, these intermediate products were mineralized into CO 2 and H 2 O via ring-opening reactions (Wu et al, 2021. ).…”

Section: Possible Degradation Pathwaymentioning

confidence: 99%

A Facile Fabrication of ZnFe2O4/Sepiolite Composite with Excellent Photocatalytic Performance on the Removal of Tetracycline Hydrochloride

et al. 2021

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The excellent photo-response of ZnFe2O4 in the visible light region makes it a promising catalyst, whereas some defects like serious particle agglomeration and easy recombination of photo-generated electron-hole pairs hinder its application. In this work, the ZnFe2O4/sepiolite (ZF-Sep) composites were synthesized using a co-precipitation method. The obtained ZF-Sep composites were characterized by XRD, SEM, TEM, FT-IR, XPS, BET, VSM and DRS. Moreover, the photocatalytic performance was evaluated by the tetracycline hydrochloride removal efficiency under simulated visible light illumination. The results displayed that the ZnFe2O4 with average sizes about 20 nm were highly dispersed on sepiolite nanofibers. All the composites exhibited better photocatalytic performance than pure ZnFe2O4 due to the synergistic effect of the improvement on the agglomeration phenomenon of ZnFe2O4 and the reduction on the recombination rate of photo-generated electrons and holes. The optimum removal efficiency was that of the ZF-Sep-11 composite, which reached 93.6% within 3 h. Besides, the composite exhibited an excellent stability and reusability. Therefore, ZF-Sep composite is a promising catalyst for the treatment of wastewater contained antibiotics.

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Excellent photocatalytic degradation of tetracycline over black anatase-TiO2 under visible light

Cited by 233 publications

References 44 publications

Defective Grey TiO2 with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis

Defective Grey TiO2 with Minuscule Anatase–Rutile Heterophase Junctions for Hydroxyl Radicals Formation in a Visible Light-Triggered Photocatalysis

TiO2 Photocatalysis for the Transformation of Aromatic Water Pollutants into Fuels

A Facile Fabrication of ZnFe2O4/Sepiolite Composite with Excellent Photocatalytic Performance on the Removal of Tetracycline Hydrochloride

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