CNTs Threaded (001) Exposed TiO2 with High Activity in Photocatalytic NO Oxidation

Overview

Journal Nanoscale

Specialty Biotechnology

Date 2016 Jan 19

PMID 26780690

Citations 5

Authors

Shuning Xiao

Wei Zhu

Peijue Liu

Fanfan Liu

Wenrui Dai

Dieqing Zhang

Wei Chen

Hexing Li

Affiliations

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Abstract

A microwave-ionothermal strategy was developed for in situ synthesis of CNTs threaded TiO2 single crystal with a tunable percentage of surface exposed (001) active facets. The CNTs were used as microwave antennas to create local "super hot" dots to induce Ti(3+) adsorption and hydrolysis, thereby leading to a good assembly of (001) facets exposed single crystalline TiO2 threaded by the CNTs in the presence of Hmim[BF4] ionic liquid. Due to the high percentage of the active (001) facets of single crystal TiO2 and the direct electron transfer property of the CNTs, the as-prepared CNTs-TiO2 composite showed a photocatalytic NO removal ratio of up to 76.8% under UV irradiation. In addition, with self-doped Ti(3+), the CNTs-TiO2 composite also exhibited an enhanced activity under irradiation with either solar lights or visible lights, showing good potential in practical applications for environmental remediation.

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