An α-Fe2O3/NiO p-n hierarchical heterojunction for the sensitive detection of triethylamine

被引：30

作者：

Bai, Shouli ^{[1
,4
]}

Han, Jingyi ^{[4
]}

Han, Ning ^{[2
]}

Zhang, Kewei ^{[1
]}

Sun, Jianhua ^{[3
]}

Sun, Lixia ^{[3
]}

Luo, Ruixian ^{[4
]}

Li, Dianqing ^{[4
]}

Chen, Aifan ^{[4
]}

机构：

[1] Qingdao Univ, State Key Lab Biofibers & Ecotext, Inst Marine Biobased Mat, Coll Mat Sci & Engn,Collaborat Innovat Ctr Shando, Qingdao 266071, Peoples R China

[2] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China

[3] Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China

[4] Beijing Univ Chem Technol, Beijing Key Lab Environm Harmful Chem Anal, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

INORGANIC CHEMISTRY FRONTIERS | 2020年 / 7卷 / 07期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

GAS-SENSING PROPERTIES; CORE-SHELL NANORODS; ASSISTED SYNTHESIS; ZNO NANOPARTICLES; PERFORMANCE; SENSORS; TEMPERATURE; ARCHITECTURES; COMPOSITES; NANOFIBERS;

D O I：

10.1039/c9qi01548e

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A novel p-n heterojunction of an alpha-Fe2O3/NiO composite was prepared by precipitation and hydrothermal methods. The structure, morphology and composition of the composite were characterized by numerous spectroscopic methods and its gas sensing properties for triethylamine (TEA) were also tested. The results showed that the composite (Fe/Ni = 4 : 1 atomic ratio) exhibited a fast response approximately 4 times that of alpha-Fe2O3 with excellent selectivity, stability and linear response in the range from 5 to 25 ppm TEA at 140 degrees C, which was due to the large specific surface area of the hierarchical structure and the formation of p-n heterojunctions at the interface of both the metal oxides. Therefore, the composite synthesized in this study is a promising sensing material for the detection of TEA and the work provides a new route to rationally design sensor structures for realizing the synergetic functions of metal oxide semiconductor interfaces.

引用

页码：1532 / 1539

页数：8

共 40 条

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