p-CuO/n-In2O3异质结纳米纤维的制备及气敏特性

doi:10.7503/cjcu20170112

高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (9): 1524.doi: 10.7503/cjcu20170112

• 研究论文: 无机化学 • 上一篇下一篇

p-CuO/n-In₂O₃异质结纳米纤维的制备及气敏特性

王茉, 李晓伟, 邵长路(), 赵英倩, 辛佳玉, 韩朝翰, 李兴华, 刘益春

东北师范大学物理学院, 紫外光发射材料与技术教育部重点实验室, 长春 130024

收稿日期:2017-02-25 出版日期:2017-09-10 发布日期:2017-08-24
作者简介:联系人简介: 邵长路, 男, 博士, 教授, 博士生导师, 主要从事功能纳米纤维材料研究. E-mail: clshao@nenu.edu.cn
基金资助:
中国博士后科学基金(批准号: 2017M610188)、国家自然科学基金(批准号: 51572045, 51272041, 61201107, 91233204)、吉林省自然科学基金(批准号: 20160101313JC)和中央高校基本科研业务费专项基金(批准号: 2412017QD007, 2412017FZ009)资助

Preparation of p-CuO/n-In₂O₃ Heterojunction Nanofibers and Their Gas Sensing Properties^†

WANG Mo, LI Xiaowei, SHAO Changlu^*(), ZHAO Yingqian, XIN Jiayu, HAN Chaohan, LI Xinghua, LIU Yichun

Key Laboratory of UV-Emitting Materials and Technology, Ministry of Education, School of Physics,Northeast Normal University, Changchun 130024, China

Received:2017-02-25 Online:2017-09-10 Published:2017-08-24
Contact: SHAO Changlu E-mail:clshao@nenu.edu.cn
Supported by:
† Supported by the China Postdoctoral Science Foundation(No.2017M610188), the National Natural Science Foundation of China(Nos.51572045, 51272041, 61201107, 91233204), the Natural Science Foundation of Jilin Province of China(No.20160101313JC) and the Fundamental Research Funds for the Central Universities, China(Nos.2412017QD007, 2412017FZ009)

摘要/Abstract

摘要：

以电纺In₂O₃纳米纤维为模版, 通过溶剂热法构建了p-CuO/n-In₂O₃异质结纳米纤维. 采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、 X射线衍射(XRD)和X射线光电子能谱(XPS)等方法对所得材料的形貌和结构进行表征. 结果表明, CuO纳米颗粒可以均匀地负载在超细In₂O₃纳米纤维表面; 随着反应液中乙酸铜浓度的增加, 负载的CuO纳米颗粒密度也逐渐增加. 通过制备旁热式气敏器件对复合纳米纤维材料的气敏特性进行了研究. 结果表明, 与纯In₂O₃纳米纤维相比, p-CuO/n-In₂O₃异质结纳米纤维对H₂S气体具有较高的灵敏度和较低的工作温度.

关键词: 纳米纤维, CuO/In2O3, p-n异质结, 气体传感器

Abstract:

p-CuO/n-In₂O₃ heterojunction nanofibers were prepared by solvothermal method using electrospun In₂O₃ nanofibers as template. The surface morphologies and microstructures of the composite nanofibers were characterized by field emission scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). It was found that the In₂O₃ nanofibers were uniformly decorated with CuO nanoparticles, and the surface densities of CuO nanoparticles could be controlled by varing the precursor concentration of cupric acetate. Side-heated gas sensors were prepared based on these composite nanofiers. The p-CuO/n-In₂O₃ heterojunction nanofibers exhibited high gas responses and low operating temperature for detecting H₂S gas compared with pure In₂O₃ nanofibers.

Key words: Nanofibers, CuO/In2O3, p-n Junction, Gas sensor

中图分类号:

O614
O649

TrendMD:

王茉, 李晓伟, 邵长路, 赵英倩, 辛佳玉, 韩朝翰, 李兴华, 刘益春. p-CuO/n-In₂O₃异质结纳米纤维的制备及气敏特性. 高等学校化学学报, 2017, 38(9): 1524.

WANG Mo, LI Xiaowei, SHAO Changlu, ZHAO Yingqian, XIN Jiayu, HAN Chaohan, LI Xinghua, LIU Yichun. Preparation of p-CuO/n-In₂O₃ Heterojunction Nanofibers and Their Gas Sensing Properties^†. Chem. J. Chinese Universities, 2017, 38(9): 1524.

图/表 9

Table 1 Precursors used for the preparation of different samples and the molar ratio of In2O3 and CuO in the products

Sample	Copper acetate added/g	Urea added/g	CuO/In₂O₃ molar ratio in product
S1	0.156	0.096	2.35
S2	0.260	0.160	1.65
S3	0.416	0.256	1.50
S4	0.520	0.320	1.20

Fig.1 SEM images of In2O3 nanofibers(A, B) and samples S1(C), S2(D), S3(E) and S4(F)

Fig.2 TEM(A) and HRTEM(B) images of sample S2

Fig.3 XRD patterns of In2O3(a), S1(b), S2(c), S3(d) and S4(e)

Fig.4 XPS spectra of CuO/In2O3 nanofibers(A) Full spectrum; (B) O1s; (C) In3d; (D) Cu2p.

Fig.5 Responses of gas sensors based on In2O3 and CuO/In2O3 composite hetero-nanofibers to 138 mg/m3 H2S at different temperatures

Fig.6 Sensitivity response of the gas sensor based on In2O3 and CuO/In2O3 composite hetero-nanofiber versus the concentration of H2S

Fig.7 Sensing transients of gas sensor based on S2 to 0.69—138 mg/m3 H2S at 100 ℃

Fig.8 Sensitivity of gas sensor based on In2O3 and S2 to different gases at 100 ℃

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p-CuO/n-In₂O₃异质结纳米纤维的制备及气敏特性

Preparation of p-CuO/n-In₂O₃ Heterojunction Nanofibers and Their Gas Sensing Properties^†

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