Page 147 - 《精细化工》2020年第7期

第 37 卷第 7 期 精 细 化 工 Vol.37, No.7
202 0 年 7 月 FINE CHEMICALS July 2020

功能材料
rGO-SnO 纳米复合物的制备及其室温下 NH 气敏性能
3
2

4
4
马 杰 1,2 ，彭同江 1,2,3* ，孙红娟 1,2 ，任亚周 1,2 ，汤光平 ，王利利
（1. 西南科技大学 固体废物处理与资源化教育部重点实验室，四川 绵阳 621010；2. 西南科技大学 矿
物材料及应用研究所，四川 绵阳 621010；3. 西南科技大学 分析测试中心，四川 绵阳 621010；4. 中
国工程物理研究院机械制造工艺研究所，四川 绵阳 621900）

摘要：以五水四氯化锡（SnCl 4·5H 2 O）和氧化石墨烯（GOs）为原料，稀氨水为 pH 控制剂，采用沉淀-焙烧法
制备了室温下对 NH 3 具有高灵敏度和高选择性的 rGO-SnO 2 纳米复合材料。利用 XRD、FTIR、XPS、SEM、TEM

和 BET 对纯 SnO 2 与 rGO(1.0%，即 rGO 占 SnO 2 的质量分数，下同)-SnO 2 纳米复合物进行了表征。与纯 SnO 2
2
相比，rGO(1.0%)-SnO 2 纳米复合物中 SnO 2 晶体尺寸较小，为 6~20 nm，比表面积更大，为 33 m /g；rGO(1.0%)-SnO 2
纳米复合材料对体积分数为 0.01%的 NH 3 灵敏度达到了 49.6%，是相同 NH 3 体积分数下纯 SnO 2 灵敏度的 2.1 倍，
响应和恢复时间分别为 21 和 204 s，比纯 SnO 2 缩短了 24 和 10 s，具有良好的重复性、选择性与稳定性；
rGO(1.0%)-SnO 2 纳米复合材料优良的气敏性能是由 rGO 与 SnO 2 产生的 p-n 异质结以及溶解的 NH 3 电离出的导
电离子共同作用的结果。
关键词：沉淀-焙烧法；rGO-SnO 2 纳米复合物；NH 3 气敏性能；功能材料
中图分类号：O659.37；TB331 文献标识码：A 文章编号：1003-5214 (2020) 07-1429-09

Preparation of rGO-SnO 2 nanocomposites and its NH 3 gas

sensing properties at room temperature

1,2
1,2
1,2
MA Jie , PENG Tongjiang 1,2,3* , SUN Hongjuan , REN Yazhou ,
4
4
TANG Guangping , WANG Lili
（1. Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of
Science and Technology, Mianyang 621010, Sichuan, China; 2. Institute of Mineral Materials and Application, Southwest
University of Science and Technology, Mianyang 621010, Sichuan, China; 3. Analysis and Test Center, Southwest
University of Science and Technology, Mianyang 621010, Sichuan, China; 4. Institute of Machinery Manufacturing
Technology, Chinese Academy of Engineering Physics, Mianyang 621900, Sichuan, China）
Abstract: rGO-SnO 2 nanocomposites with high sensitivity and selectivity to NH 3 at room temperature were
prepared by precipitation-roasting method with stannic chloride pentahydrate (SnCl 4·5H 2O) and graphene
oxide (GOs) as raw materials, dilute aqueous ammonia solution as pH control agent. XRD, FTIR, XPS,
SEM, TEM, and BET were used to characterize pure SnO 2 and rGO(1.0%, mass fraction of RGO in SnO 2,
the same below)-SnO 2 nanocomposites. Compared with those of pure SnO 2, the crystal size of SnO 2 in the
2
rGO(1.0%)-SnO 2 nanocomposites was smaller, 6~20 nm, and the specific surface area was larger, 33 m /g.
The sensitivity of rGO(1.0%)-SnO 2 nanocomposites to 0.01% (volume fraction) NH 3 reached 49.6%, which
was 2.1 times of that of pure SnO 2 at the same NH 3 volume fraction. rGO(1.0%)-SnO 2 nanocomposites had
response and recovery time of 21 and 204 s, respectively, 24 and 10 s shorter than pure SnO 2, exhibiting
good repeatability, selectivity and stability. The excellent gas-sensitive properties of rGO(1.0%)-SnO 2
nanocomposites can be attributed to the interaction of p-n heterojunction produced by rGO and SnO 2 and
dissolved NH 3 producing ionized conductive ions.

收稿日期：2020-01-02; 定用日期：2020-04-10; DOI: 10.13550/j.jxhg.20200006
基金项目：国家自然科学基金（U1630132、41772036）
作者简介：马 杰（1993—），男，硕士生，E-mail：majie514@163.com。联系人：彭同江（1958—），男，博士，教授，E-mail：
tjpeng@swust.edu.cn。