不同形貌MoS2的制备及对NH3气敏性能的研究

doi:10.15541/jim20220053

无机材料学报 ›› 2022, Vol. 37 ›› Issue (10): 1135-1140.DOI: 10.15541/jim20220053 CSTR: 32189.14.10.15541/jim20220053

不同形貌MoS₂的制备及对NH₃气敏性能的研究

李文博¹^,²(), 钱荣²(), 卓尚军², 江鸿¹, 盛成², 朱月琴²

1.上海理工大学材料科学与工程学院, 上海 200093
2.中国科学院上海硅酸盐研究所, 国家大型科学仪器中心上海无机质谱中心, 上海 200050

收稿日期:2022-01-30 修回日期:2022-03-20 出版日期:2022-10-20 网络出版日期:2022-07-08
通讯作者: 钱荣, 研究员. E-mail: qianrong@mail.sic.ac.cn
作者简介:李文博(1996-), 男, 硕士研究生. E-mail: hymnek@hotmail.com
基金资助:
上海市政府间国际合作项目(19520712000);上海市科技创新行动计划科学仪器领域项目(20142201100);上海无机材料测试技术平台(19DZ2290700)

MoS₂ with Different Morphologies: Preparation and Gas-sensing Property of NH₃

LI Wenbo¹^,²(), QIAN Rong²(), ZHUO Shangjun², JIANG Hong¹, SHENG Cheng², ZHU Yueqin²

1. School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2. National Center for Inorganic Mass Spectrometry Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received:2022-01-30 Revised:2022-03-20 Published:2022-10-20 Online:2022-07-08
Contact: QIAN Rong, professor. E-mail: qianrong@mail.sic.ac.cn
About author:LI Wenbo(1996-), male, Master candidate. E-mail: hymnek@hotmail.com
Supported by:
Shanghai Intergovemental International Cooperation Project(19520712000);Shanghai Science and Technology Innovation Action Project(20142201100);Shanghai Technical Platform of Testing on Inorganic Materials(19DZ2290700)

摘要/Abstract

摘要：

氨气污染是空气污染的重要因素之一, 且氨气容易诱发急性水肿和呼吸衰竭等疾病, 严重危害人体健康。开发高性能氨气传感器已经成为氨气实时监测和安全预警的重要手段。本工作采用水热法制备了纳米花状、纳米球状和纳米片状三种不同形貌的二硫化钼, 以此构建了三种MoS₂氨气传感器, 并利用自主搭建的气敏检测平台进行气敏性能研究。气敏实验结果表明: 在三种不同形貌的MoS₂氨气传感器中, 纳米花状MoS₂传感器对于氨气具有更好的响应性能, 对于10×10^-6 NH₃的响应值为7.41%, 而相同氨气浓度条件下的纳米片状和纳米球状MoS₂传感器的响应值分别为2.01%和5.11%。此外, 纳米花状MoS₂传感器还表现出优异的可重复性、稳定性和选择性。纳米花状MoS₂传感器具有优越的响应性能, 主要因为其具有较大的比表面积, 可为NH₃的吸附提供更多的活性位点。本研究为采用MoS₂作为基底材料制备高性能的NH₃传感器提供了新思路。

关键词: 二硫化钼, 纳米花, 氨气, 传感器, 气敏性能

Abstract:

Ammonia leak is one of the key factors for air pollution, which may cause acute edema, respiratory failure and other diseases harmful to human health. Nowadays, the development of high-performance ammonia sensors has become one of the important means of real-time monitoring and safety warning of ammonia. In this work, three types of molybdenum disulfide with different morphologies of nanoflower, nanosphere and nanosheet were prepared by the hydrothermal method, and three types of MoS₂ ammonia sensors were constructed. The results of gas-sensing experiments showed that among these MoS₂ ammonia sensors with different morphologies, the NH₃ gas sensor made of nanoflowers MoS₂ performed the best performance with a high response value of 7.41% to 10×10^-6 NH₃, while those of the nanosheets MoS₂ and nanospheres MoS₂ sensors under the same NH₃ concentration were 2.01% and 5.11%, respectively. In addition, the nanoflowers MoS₂sensor also exhibited excellent repeatability, stability and selectivity. The reason for the superior response performance of the nanoflower MoS₂ ammonia sensor is mainly due to the larger surface area, which could provide more active sites for the adsorption of ammonia. This study demonstrates an effective way to prepare high-performance NH₃ sensors with using MoS₂ as the substrate material.

Key words: MoS₂, nanoflower, ammonia, gas sensor, gas-sensing

中图分类号:

O649

李文博, 钱荣, 卓尚军, 江鸿, 盛成, 朱月琴. 不同形貌MoS₂的制备及对NH₃气敏性能的研究[J]. 无机材料学报, 2022, 37(10): 1135-1140.

LI Wenbo, QIAN Rong, ZHUO Shangjun, JIANG Hong, SHENG Cheng, ZHU Yueqin. MoS₂ with Different Morphologies: Preparation and Gas-sensing Property of NH₃[J]. Journal of Inorganic Materials, 2022, 37(10): 1135-1140.

图/表 6

图1 气敏性能检测示意图

Fig. 1 Diagram of gas-sensing property test (a) Gas-sensing test; (b) Structure of planar sensor

图2 不同形貌MoS2的SEM照片

Fig. 2 SEM images of MoS2 samples with different morphologies (a) Nanoflowers; (b) Nanosheets; (c) Nanospheres

图3 不同形貌MoS2的(a)XRD和(b)Raman表征

Fig. 3 (a) XRD and (b) Raman characterizations of MoS2 with different morphologies

图4 不同形貌MoS2传感器对于10×10-6 NH3的响应情况

Fig. 4 Response of the sensors with different morphologies of MoS2 to 10×10-6 NH3

图5 纳米花MoS2氨气传感器在不同氨气浓度条件下的(a)动态响应曲线和(b)线性响应关系

Fig. 5 (a) Dynamic response curve and (b) linear fitting curve of nanoflowers MoS2 sensor at different concentrations of NH3

图6 传感器的(a)可重复性测试, (b)长期稳定性测试和(c)选择性测试

Fig. 6 (a) Repeatability testing, (b) long-term stability and (c) selectivity testing towards various gases of the sensor

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不同形貌MoS₂的制备及对NH₃气敏性能的研究

MoS₂ with Different Morphologies: Preparation and Gas-sensing Property of NH₃

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