Cu/SnO2 xerogels: a novel epoxide derived nanomaterial as formaldehyde gas sensor
Source abstract
Abstract
Traditionally, sol–gel processing of metal oxides using organometallic precursors is expensive, nonaqueous, and complicated when it comes to two-or-more dissimilar metal oxides. Herein, we report a versatile epoxide-assisted non-organometallic, aqueous, and inexpensive synthesis route of developing Cu/SnO2 xerogels and their use as efficient formaldehyde (FA) gas sensors. The route utilizes easy to handle salts as precursors (tin and copper chlorides, in the present case) and organic epoxide (propylene oxide) as a gelation agent, which led to highly porous web matrix of Cu/SnO2. The obtained Cu/SnO2 xerogels, with 0–2 mol% Cu doping, were analyzed using XRD, Fourier transform infrared, UV–Vis, FE-SEM, TEM/HRTEM, and EDAX. As-developed xerogels showed their versatility in physico-chemical as well as FA gas sensing properties. By proper Cu-doping level in SnO2 matrix, the reduction in sensor operating temperature (325–275 °C) and enhancement in the gas response (S = 50–96%) are chronicled. The effects of gas sensing are represented by an epoxy-assisted Cu/SnO2 sol–gel process and the subsequent morphological and structural properties.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · ZnO doping and properties · Transition Metal Oxide Nanomaterials
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