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Your search keyword '"Xi, Guangcheng"' showing total 9 results
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9 results on '"Xi, Guangcheng"'

1. Plasmonic W18O49-photosensitized TiO2 nanosheets with wide-range solar light harvesting

Author

Li Mengchen, Yahui Li, Wentao Li, Xi Guangcheng, Hua Bai, Junfang Li, and Xinshi Li

Subjects
Range (particle radiation), Materials science, Nir light, business.industry, General Chemical Engineering, Near-infrared spectroscopy, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, medicine.disease_cause, 01 natural sciences, 0104 chemical sciences, Nanocrystal, Solar light, medicine, Photocatalysis, Optoelectronics, 0210 nano-technology, business, Ultraviolet, Plasmon
Abstract

The search for photocatalytic materials that can harvest a wide spectrum of solar light, from ultraviolet (UV) to near infrared (NIR) regions remains one of the most challenging missions. Here, by in situ growing plasmonic W18O49 nanocrystals on TiO2 nanosheets with exposed {001} facets, a hybrid photocatalyst with broad spectrum photocatalytic properties has been fabricated, which can harvest UV, visible, and NIR light to decompose organic contaminants. The results present a new concept that plasmonic transition-metal oxides with a high concentration of oxygen vacancies can be used as non-noble metal photosensitizers to design efficient photocatalysts with high activity.

Published
2017
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3. Ligand-free and size-controlled synthesis of oxygen vacancy-rich WO3−x quantum dots for efficient room-temperature formaldehyde gas sensing

Author

Xi Guangcheng, Yahui Li, Hua Bai, Tingting Zeng, Wentao Li, Xinshi Li, and Qiqi Zhang

Subjects
Ligand, General Chemical Engineering, Formaldehyde, chemistry.chemical_element, Nanotechnology, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, Decomposition, Oxygen, Oxygen vacancy, Grain size, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Quantum dot, 0210 nano-technology
Abstract

A facile solvothermal decomposition route was developed for the size-adjustable synthesis of nearly monodispersed, monoclinic-phase WO3−x QDs with sizes ranging from 1.3–4.5 nm. These QDs, with a high concentration of oxygen vacancies, have strong quantum confinement effects and can strongly absorb near-infrared (NIR) light. A solid–liquid–solid growth mechanism was proposed to explain the formation of the QDs. Experiments demonstrated that the rich oxygen vacancies and ultrathin grain size imparted these WO3−x QDs with excellent room-temperature formaldehyde sensing properties.

Published
2016
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9. Metallic Ti 3 O 5 hierarchical porous microspheres with an enhanced photothermal property.

Author

Du R, Liu W, Bai H, Wang H, and Xi G

Abstract

γ-Ti 3 O 5 is one kind of prominent non-stoichiometric metal oxide due to its intriguing ability in electric and electrochemical behaviors. This work reports another attractive property of γ-Ti 3 O 5 hierarchical porous microspheres, the extremely effective photothermal property with a high photothermal conversion efficiency. Theory and experimental results indicate that γ-Ti 3 O 5 hierarchical porous microspheres possess metallic features and display very strong localized surface plasma resonance effects over the visible and near-infrared region. Under simulated sunlight or near infrared light, the metallic γ-Ti 3 O 5 exhibits a photothermal conversion efficiency of up to 65.29%. Under irradiation by a near-infrared laser with a wavelength of 808 nm, the γ-Ti 3 O 5 hierarchical porous microspheres can significantly inhibit cancer cell viability in vitro and disrupt tumor tissue growth in vivo in a short period. In vitro and in vivo toxicity experiments demonstrate that it has good biocompatibility. The ultrahigh photothermal conversion efficiency and biocompatibility make the γ-Ti 3 O 5 very attractive for technological uses in photothermal therapy, solar energy utilization, and infrared light detection and so on., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)

Published
2020
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