Preparation and Gas Sensing Performance of Hierarchical Porous ZnO-based Materials with Sunflower Rods as a Biological Template

doi:10.1007/s40242-019-9125-2

高等学校化学研究 ›› 2019, Vol. 35 ›› Issue (5): 755-761.doi: 10.1007/s40242-019-9125-2

Preparation and Gas Sensing Performance of Hierarchical Porous ZnO-based Materials with Sunflower Rods as a Biological Template

WANG Bowei¹, ZENG Qingrui², CHEN Shu¹, YUE Tongtong², HAN Bing¹, FENG Wei², YANG Defeng¹

1. Second Hospital of Jilin University, Changchun 130021, P. R. China;
2. Key Laboratory of Groundwater Resource and Environment, Ministry of Education, College of Environment and Resources, Jilin University, Changchun 130021, P. R. China

收稿日期:2019-04-28 出版日期:2019-10-01 发布日期:2019-09-24
通讯作者: YANG Defeng E-mail:wf0104019@163.com
基金资助:
Supported by the Key Technology Research and Development Project of Jilin Province, China(No.20180201056YY) and the Medical Health Project of Jilin Province, China(No.20190304032YY).

Preparation and Gas Sensing Performance of Hierarchical Porous ZnO-based Materials with Sunflower Rods as a Biological Template

WANG Bowei¹, ZENG Qingrui², CHEN Shu¹, YUE Tongtong², HAN Bing¹, FENG Wei², YANG Defeng¹

1. Second Hospital of Jilin University, Changchun 130021, P. R. China;
2. Key Laboratory of Groundwater Resource and Environment, Ministry of Education, College of Environment and Resources, Jilin University, Changchun 130021, P. R. China

Received:2019-04-28 Online:2019-10-01 Published:2019-09-24
Contact: YANG Defeng E-mail:wf0104019@163.com
Supported by:
Supported by the Key Technology Research and Development Project of Jilin Province, China(No.20180201056YY) and the Medical Health Project of Jilin Province, China(No.20190304032YY).

摘要/Abstract

摘要： A graded porous structure SnO₂/ZnO composite was prepared with sunflower rods as a biological template. The prepared samples were subjected to phase analysis by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffractiometry(XRD) and X-ray photoelectron spectroscopy(XPS). ZnO sample was a pure phase of hexagonal wurtzite, and the template had been completely removed. The surface of the sample presented a honeycomb-like structure of a sunflower rod template, which was formed by interconnecting the porous channels, and had a smaller average size and exhibited n-n heterojunction at the n-type ZnO interface. Compared with that of pure ZnO, the response of the hierarchical porous structure SnO₂/ZnO composite to 100 mg/L n-butanol reached a maximum of 40.61 at 240℃, about 2.7 times higher than that of pure ZnO. Its response time and recovery time are 6 and 3 s, respectively, which are also better than those of pure ZnO. SnO₂/ZnO composite exhibits good gas selectivity, which is related to the improvement of the structure and the forming of n-n heterojunctions of the material.

关键词: Sunflower stem, SnO₂/ZnO, Graded porous structure, Gas sensitivity, n-Butanol

Abstract: A graded porous structure SnO₂/ZnO composite was prepared with sunflower rods as a biological template. The prepared samples were subjected to phase analysis by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffractiometry(XRD) and X-ray photoelectron spectroscopy(XPS). ZnO sample was a pure phase of hexagonal wurtzite, and the template had been completely removed. The surface of the sample presented a honeycomb-like structure of a sunflower rod template, which was formed by interconnecting the porous channels, and had a smaller average size and exhibited n-n heterojunction at the n-type ZnO interface. Compared with that of pure ZnO, the response of the hierarchical porous structure SnO₂/ZnO composite to 100 mg/L n-butanol reached a maximum of 40.61 at 240℃, about 2.7 times higher than that of pure ZnO. Its response time and recovery time are 6 and 3 s, respectively, which are also better than those of pure ZnO. SnO₂/ZnO composite exhibits good gas selectivity, which is related to the improvement of the structure and the forming of n-n heterojunctions of the material.

Key words: Sunflower stem, SnO₂/ZnO, Graded porous structure, Gas sensitivity, n-Butanol

WANG Bowei, ZENG Qingrui, CHEN Shu, YUE Tongtong, HAN Bing, FENG Wei, YANG Defeng. Preparation and Gas Sensing Performance of Hierarchical Porous ZnO-based Materials with Sunflower Rods as a Biological Template[J]. 高等学校化学研究, 2019, 35(5): 755-761.

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Preparation and Gas Sensing Performance of Hierarchical Porous ZnO-based Materials with Sunflower Rods as a Biological Template

Preparation and Gas Sensing Performance of Hierarchical Porous ZnO-based Materials with Sunflower Rods as a Biological Template

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