Photocatalytic degradation properties of V-doped TiO2 to automobile exhaust

Wang, Tong; Shen, Dongya; Xu, Tao; Jiang, Ruiling

doi:10.1016/j.scitotenv.2017.02.021

Cited by 46 publications

(16 citation statements)

References 25 publications

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“…The electrons (e − ) excited by light can reduce O 2 to . O 2 − , [33–35] but the VB potential (3.32) of ECF is larger than standard H 2 O/ . OH (2.4 eV vs. NHE).…”

Section: Resultsmentioning

confidence: 88%

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Mace‐Shaped Cu₇S₄ NW/ECF Composites for Photocatalytic Degradation of Antibiotics

Cao

Guan

et al. 2021

ChemistrySelect

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Firstly, Sb-SnO 2 /potassium titanate (Sb-SnO 2 / KTO) was fabricated by a sol-gel method, it was named ECF. and then Cu 7 S 4 nanorod arrays were grown on the surface of ECF by a hydrothermal method (Cu 7 S 4 NW/ECF).This article discusses the preparation method of Cu 7 S 4 NW/ECF composite photocatalyst to solve the problem of degradation of tetracycline hydrochloride under visible light. It is found that Cu 7 S 4 NW/ECF composite materials can be successfully prepared when Cu : S = 1 : 1, and the Cu 7 S 4 NW/ECF composite has stronger photocatalytic activity then others, The degradation efficiency of tetracycline hydrochloride (TCH) by the composite can reach 98 % after 2 h. which is mainly attributed to the fact that Cu 7 S 4 is a near-infrared material, and a tight heterojunction can be formed between Cu 7 S 4 and ECF, which expands the light response range of the material to a certain extent. At the same time, the direct Z-type mechanism of Cu 7 S 4 NW/ECF composite in the process of photocatalysis is proposed, which is conducive to the separation of electrons and holes. Therefore, the Cu 7 S 4 NW/ECF composite material can effectively degrade tetracycline hydrochloride.

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“…The electrons (e − ) excited by light can reduce O 2 to . O 2 − , [33–35] but the VB potential (3.32) of ECF is larger than standard H 2 O/ . OH (2.4 eV vs. NHE).…”

Section: Resultsmentioning

confidence: 88%

“…In addition, the CB potential of Cu 7 S 4 (À 1.06 eV, vs. NHE) is smaller than that of O 2 / * O 2 À (À 0.33 eV, vs. NHE). [32] The electrons (e À ) excited by light can reduce O 2 to O 2 À , [33][34][35] but the VB potential (3.32)…”

Section: Analysis Of Photocatalytic Mechanismmentioning

confidence: 99%

Mace‐Shaped Cu₇S₄ NW/ECF Composites for Photocatalytic Degradation of Antibiotics

Cao

Guan

et al. 2021

ChemistrySelect

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“…Metal oxides with high activity, such as Cu, can achieve similar catalytic effects to rare metals at normal temperatures. Moreover, Cu could be widely applied because of its lower cost, and because it has practical road engineering applications, which provide a new research direction for the metal doped catalytic degradation of automobile exhaust [23,38].…”

Section: Resultsmentioning

confidence: 99%

A Study on Modified Bitumen with Metal Doped Nano-TiO2 Pillared Montmorillonite

et al. 2019

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TiO2 pillared montmorillonite (T/M) modifiers have been studied to alleviate the aging of asphalt pavement and degrade automobile exhaust, but the photocatalytic activity of ordinary TiO2 is not good enough. In this study, in order to improve the photocatalytic performance of T/M, different metal (Ce, Cu, Fe) doped modifiers were prepared based on T/M. Metal doped TiO2 pillared montmorillonite was prepared by the sol-gel method. The modifier was characterized by X-ray diffraction (XRD) and an Ultraviolet visible (UV-Vis) spectrophotometer. The results show that TiO2 with different metal ions successfully entered into the layer of organic montmorillonite (OMMT) to form a pillared structure. Compared with the undoped TiO2 pillared montmorillonite (T/M), the optical absorption edge of the metal doped TiO2 pillared montmorillonite has an obvious red shift. In addition, the influences of the different content of modifiers on the properties of the original bitumen and catalytic capacities for automobile exhaust were also investigated. The results show that Ce doped TiO2 (Ce-T/M) pillared montmorillonite has the best improvement in high temperature performance and ultraviolet (UV) resistance of bitumen. In the experiment of automobile exhaust degradation, the degradation law of NO and HC showed Cu-T/M > Ce-T/M > Fe-T/M > T/M. These three kinds of metal ions can effectively improve the photocatalytic degradation efficiency of T/M.

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“…Thus, the development of a visible light-responsive TiO 2 -based photocatalyst would be highly desirable. A number of strategies have been reported to extend its adsorption range into the visible light spectrum by changing the bandgap of semiconductors, including replacing O atom in TiO 2 with C or N [7,8], doping with metal element, such as Sb and V [9,10], decorating with other metal oxides [11,12], or preparing hydrogenated black-TiOx structures [13]. Among these, engineering of TiO 2 by decorating plasmonic metallic nanoparticles with Ag or Au is a particularly promising approach [14].…”

Section: Introductionmentioning

confidence: 99%

The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts

et al. 2020

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Exploring solar-excited heterogeneous photocatalysts by taking advantage of surface plasmon resonance (SPR) has drawn growing research attention. As it could help to pave the way for global sustainable development. The decoration of TiO2 particles with noble metals possessing SPR effects is regarded as one of the most effective solutions. The perfect match of the SPR absorption band with the spectrum of incident light is an essential factor for plasmonic enhancement. However, modifying with sole noble metal is often limited as it tunes wavelength of only several nanometers. To overcome this drawback, an alternative approach can be offered by decoration with more than one noble metal. For instance, Au-Ag co-decoration displays greatly adjustable, composition-dependent SPR agent over a broad range of the visible light spectrum (ca. from 415 to 525 nm). Hence Au-Ag complex is a remarkable candidate for tuning the photo adsorption of TiO2 from UV to visible light. This study presents a novel and tailored method for the fabrication of Au-Ag co-modified TiO2 particles, and how Au-Ag dependent SPR was applied as the visible light-responsive TiO2 based photocatalysts in a simple but reliable way. The fabricated Au-Ag co-decorated TiO2 (AuxAg(1−x)/TiO2) was characterized and proved to own excellent stability and large specific surface area. The optimization of these particles against the wavelength of maximal solar light intensity was confirmed by photo degradation of methylene blue under visible light radiation. This work may provide further insight into the design of TiO2-based composites with improved photocatalytic properties for environmental remediation and renewable energy utilization.

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Photocatalytic degradation properties of V-doped TiO2 to automobile exhaust

Cited by 46 publications

References 25 publications

Mace‐Shaped Cu₇S₄ NW/ECF Composites for Photocatalytic Degradation of Antibiotics

Mace‐Shaped Cu₇S₄ NW/ECF Composites for Photocatalytic Degradation of Antibiotics

A Study on Modified Bitumen with Metal Doped Nano-TiO2 Pillared Montmorillonite

The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts

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Photocatalytic degradation properties of V-doped TiO2 to automobile exhaust

Cited by 46 publications

References 25 publications

Mace‐Shaped Cu7S4 NW/ECF Composites for Photocatalytic Degradation of Antibiotics

Mace‐Shaped Cu7S4 NW/ECF Composites for Photocatalytic Degradation of Antibiotics

A Study on Modified Bitumen with Metal Doped Nano-TiO2 Pillared Montmorillonite

The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts

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Mace‐Shaped Cu₇S₄ NW/ECF Composites for Photocatalytic Degradation of Antibiotics

Mace‐Shaped Cu₇S₄ NW/ECF Composites for Photocatalytic Degradation of Antibiotics