Nanoscale Ag-Decorated Hollow Porous CuO/SnO₂ Heterojunctions for Isopropanol Detection

Longjun Guo; Wei Liu; Chunqing Wang

doi:10.1021/acsanm.3c00959

journal article·2023-05-12

Nanoscale Ag-Decorated Hollow Porous CuO/SnO₂ Heterojunctions for Isopropanol Detection

Longjun Guo, Wei Liu, Chunqing Wang

ACS Applied Nano Materials· Volume 6· Issue 9

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Source abstract

Abstract

Nanoscale Ag-decorated CuO/SnO 2 heterojunctions with coralloid hollow porous structure (ACSO HPs) were successfully synthesized though a hydrothermal route with electroless Ag plating followed by the calcination and acid-washing. Detailed microstructural characterizations confirmed that the hollow porous structure comprised CuO/SnO 2 and Ag/SnO 2 nanoheterojunctions, and the SnO 2 surface was decorated primarily with nano-Ag, which was the outer layer of the structure. The ACSO HPs sensor displayed a higher response to isopropanol compared to toluene, acetone, benzene, ethanol, and methanol than other samples. For 100 ppm isopropanol, the ACSO sensor exhibited a faster response time (6 s) and a higher recovery time (34 s) than undecorated Ag samples. The improved sensing performance of ACSO samples was ascribed to the synergistic effect of the CuO/SnO 2 nanoheterojunctions with the dramatic sensitization of the decorated nano-Ag, as well as the HPs.

Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Analytical Chemistry and Sensors · Advanced Chemical Sensor Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, Heilongjiang 150080, China

Funding

National Natural Science Foundation of China

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