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Updated: Dec 31, 2025
Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
Facile metal-organic frameworks-templated fabrication of hollow indium oxide microstructures for chlorine detection
Jiangwei Ma1, Huiqing Fan2, Xiaokun Zheng1
1State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, No. 127 Youyixi Road, Beilin District, Xi'an 710072, China.
Abstract:
Metal oxides with the hollow microstructure by the facile synthetic strategy are hopeful in applications for photocatalysis, supercapacitor, and gas sensor owing to their large surface areas, porosity ratio and rich active sites. In this work, indium oxide porous hollow rods (In2O3 PHRs) are successfully prepared using metal-organic frameworks (MOFs) as the template. The morphology of In2O3 PHRs is hexagonal hollow micro-rods with a porous structure. The investigation on the gas-sensing performance reveals that the In2O3 PHRs sensor displays outstanding sensitivity and selectivity toward 10 ppm chlorine gas (Cl2) at low operational temperature (160 °C). Furthermore, the In2O3 PHRs sensor displays a low detection limit (3.2 ppb) and short response and recovery time (38/13 s). The unique morphology and abundant oxygen vacancies are conduced to the excellent gas-sensing activities, which is benefited from the utilization and decomposition of In-MOFs precursor. In addition, the gas sensing mechanism of reducing gases and oxidizing gases is deduced in detail for the In2O3 PHRs sensor.
