Study on needle-like Ni-doped In<sub>2</sub>O<sub>3</sub> and gas-sensitive properties prepared by cryogenic precipitation

ZHOU Xingyu; FANG Zheng; LI Pei

doi:10.13873/J.1000-9787(2021)09-0014-04

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Study on needle-like Ni-doped In₂O₃ and gas-sensitive properties prepared by cryogenic precipitation

更新时间：2025-09-11

- Study on needle-like Ni-doped In₂O₃ and gas-sensitive properties prepared by cryogenic precipitation
- Issue 9, Pages: 14-17+21(2021)
- 作者机构：
  
  江西理工大学电气工程与自动化学院
- 作者简介：
- 基金信息：
- DOI：10.13873/J.1000-9787(2021)09-0014-04
  CLC： TQ133.53
- Published：2021
- 稿件说明：
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ZHOU Xingyu, FANG Zheng, LI Pei. Study on needle-like Ni-doped In₂O₃ and gas-sensitive properties prepared by cryogenic precipitation[J]. 2021, (9): 14-17+21.
DOI：

ZHOU Xingyu, FANG Zheng, LI Pei. Study on needle-like Ni-doped In₂O₃ and gas-sensitive properties prepared by cryogenic precipitation[J]. 2021, (9): 14-17+21. DOI： 10.13873/J.1000-9787(2021)09-0014-04.

摘要

采用低温沉淀法分别制备了纯的In

和Ni掺杂的In

纳米粉体。通过XRD、SEM和TEM等手段进行微观结构表征

并对粉体的气敏性能进行测试。结果表明:Ni的掺杂对针状形貌的形成具有直接而重要的作用

纯的In

为颗粒状结构

Ni掺杂的In

（In︰Ni摩尔比为9︰1）由大量的长度为0.4μm左右、直径为5 nm左右的针状结构所组成。其中

In︰Ni摩尔比为9︰1时所得到的Ni掺杂的In

纳米粉体（样品S4）在260℃工作温度下对50×10

-6

的灵敏度值为696.9±73.1

且具有选择性好、响应-恢复时间短等特性。最后

对可能的形貌生成机理进行了研究。

Abstract

Needle-like Ni-doped In

is prepared by a facile chemical route under a low temperature of 60 ℃ without any surfactant or template.The morphological features are analyzed by XRD

SEM and TEM

and the gas sensing characteristics of the obtained products are also studied.The results demonstrate that the doping of Ni plays a direct and important role in the formation of needle-like morphology

as the pure In

consists of large irregular nanospheres

while the Ni-dope

d In

（molar ratio of In︰Ni is 9︰1）consists of large needle-like with 5 nm in width and 0.4 μm in length.The sensor based on the needle-like Ni-doped In

（sample S4）exhibits sensitivity of 696.9±73.1 for 50×10

-6

at 260 ℃.The sensor also has satisfactory selectivity

quickly response and short recover time.Finally

the formation mechanism is studied.

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College of Chemistry and Environmental Science,Henan Key Lab.for Environmental Pollution Control,Henan Normal University

⁰

Study on needle-like Ni-doped In2O3 and gas-sensitive properties prepared by cryogenic precipitation

DOI：10.13873/J.1000-9787(2021)09-0014-04

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Abstract

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Study on needle-like Ni-doped In₂O₃ and gas-sensitive properties prepared by cryogenic precipitation