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Preparation of Carbon Material Derived from Walnut Shell and Its Gas-Sensing Properties
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Journal Article
Preparation of Carbon Material Derived from Walnut Shell and Its Gas-Sensing Properties
2023
Overview
China is the largest walnut producer with the largest planting area and output in the world. The discarded walnut shell (WS) is often burned or incinerated, which not only causes environmental pollution, but also may exacerbate the greenhouse effect. In order to realize resource utilization, WS was prepared into N-doped carbon materials through a simple and environmentally friendly hydrothermal reaction at 180°C. In order to further improve the N content of the product, peptone and WS were added to the hydrothermal reaction together to prepare carbon materials with higher N content. The gas-sensing properties of two biomass carbon materials were compared. The results show that higher N doping in carbon material derived from walnut shell contributes to higher selectivity for formaldehyde (CH2O) and hydrogen peroxide (H2O2) at room temperature. Compared with the carbon material derived from pure WS, the responses of higher-N-doped carbon materials to CH2O and H2O2 was increased by 12 and 14 times, respectively. And the high-N-doped carbon material can detect a low concentration of H2O2 (0.29 ppm). This work provides a reference for the green utilization of fruit shells and the development of sensing materials.
Publisher
Springer Nature B.V
Subject
