期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 39, 页码 15064-15071出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta05687c
关键词
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资金
- State Key 973 Program of PRC [2013CB934104]
- NSF of China [51372041, 51422202, 21673048, 51402049, 51432004, 21210004, U1463206]
- Shu Guang Project by SMEC [13SG02]
- SEDF
- Shanghai Pujiang Program, China [16PJ1401100]
- Shanghai committee of science and technology, China [15ZR1402000]
- National Youth Top-notch Talent Support Program of China
- State Key Laboratory of ASIC System [2015KF002]
- China Postdoctoral Science Foundation [KLH1615138]
- Shanghai Nature Science Foundation of China [14ZR1416600]
- Qatar University [QUUG-CAS-DMST-15\16-18]
- Deanship of Scientific Research at King Saud University [PRG-1437-32]
Semiconductor zinc oxides with a high surface area and porosity offer great potential for their widespread applications, particularly in the areas of optoelectronic devices and solid-state gas sensors owing to their size-dependent physical and chemical properties. Herein, ordered mesoporous ZnO with uniform large mesopores and a crystalline framework is successfully synthesized through a citric acid assisted softtemplate strategy using lab-made amphiphilic diblock copolymer poly(ethylene oxide)-b-polystyrene (PEO-b-PS) as a structure directing agent. A gradient calcination treatment is employed to transform the as-made zinc complex/template composites into hierarchically mesoporous crystalline zinc oxides via decomposition of copolymer templates and the intermediate of zinc carbonate, while preserving the highly ordered mesostructure. Owing to its well-connected bimodal mesopores, high surface area and crystalline ZnO framework, the obtained mesoporous ZnO exhibits excellent ethanol sensing performance with a fast response (6 s) and recovery (7 s), and high sensitivity and selectivity.
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