Preparation and Gas Sensing Properties of Hollow ZnS Microspheres

Abstract

Hollow ZnS microspheres are synthesized by a facile hydrothermal method. Morphology and structure of the ZnS microspheres are analyzed by SEM, TEM, XRD and N2 sorption technique, Gas sensing properties of the as-prepared ZnS sensor are also systematically investigated. The results show that the ZnS microspheres have well-developed porous and hollow nanostructure. The sensor based on the ZnS microspheres exhibits ultra-fast response (1-2 s) and fast recovery time (7-34 s) towards ethanol at the optimal operating temperature of 160 degrees C. Moreover, the ZnS sensor also demonstrates high selectivity to other gases such as methanol, benzene, dichloromethane and hexane, suggesting that it is a promising candidate for ethanol sensing applications.

II–VI Semiconductor-Based Conductometric Gas Sensors: Is There a Future for These Sensors?

“…Currently, based on II–VI compounds, a variety of 3D structures have been synthesized and used for the development of gas sensors. These 3D structures include hierarchical nanostructures [ 57 , 58 , 85 , 86 ], hollow spheres [ 87 , 88 ], and core/shell nanostructures [ 89 , 90 , 91 ]. These developments have shown that this direction is indeed very promising.…”

Influence of structural disorder on the photocatalytic properties of ZnS nanocrystals prepared by the one-pot solvothermal approach

“…Among the materials proposed for this purpose, the zinc sulfide (ZnS) semiconductor materials have a wide bandgap of about 3.6 eV and exhibit highly tunable chemical and physical properties as well as unique functionalities for a huge variety of emerging technologies (Chen et al, 2010;Hussain et al, 2017;Ippen et al, 2014;Jellison et al, 1986;La Porta et al, 2014a;Lee and Wu, 2017;Lin et al, 2019;Sultana et al, 2018;Xiao et al, 2016;Zhang et al, 2013;Ziegler et al, 2008). A notable example of ZnS-related applications includes light-emitting diodes (LEDs), lasers, sensors, solar cells, piezoelectric nanogenerator, (photo)catalysis, and biomedical applications (Hussain et al, 2017;Ippen et al, 2014;Jellison et al, 1986;La Porta et al, 2014a;Lee and Wu, 2017;Lin et al, 2019;Sultana et al, 2018;X.…”

“…A notable example of ZnS-related applications includes light-emitting diodes (LEDs), lasers, sensors, solar cells, piezoelectric nanogenerator, (photo)catalysis, and biomedical applications (Hussain et al, 2017;Ippen et al, 2014;Jellison et al, 1986;La Porta et al, 2014a;Lee and Wu, 2017;Lin et al, 2019;Sultana et al, 2018;X. Wang, et al, 2011;Xiao et al, 2016;Zhang et al, 2013;Ziegler et al, 2008). Furthermore, more recently, the ZnS-based heterostructure have been widely studied, mainly due to high quality of ZnS shell (in core/shell structures with a lower bandgap core) that contributes to an increase in the efficiency and stability of optoelectronic devices based on ZnS heterostructures (Chen et al, 2021;Mukherjee and Selvaraj, 2021;Talapin et al, 2004;P.…”

“…For this reason, several methodologies have been widely developed in the last decades for their simple and straightforward manufacture of ZnS-related materials with desired particle sizes, structures, compositions, and morphologies (Hussain et al, 2017;Jellison et al, 1986;Lee and Wu, 2017;Sultana et al, 2018;X. Wang et al, 2011;Xiao et al, 2016;Zhang et al, 2013).…”