Son Le Lam, Cuong Nguyen Duc, Van Thi Tran Thi, Hieu Le Trung, Trung Do Dang, Van Hieu Nguyen
University of Sciences, Hue University 77 Nguyen Hue Hue City Vietnam.
School of Hospitality and Tourism, Hue University 22 Lam Hoang Hue City Vietnam
RSC Adv. 2019 Mar 26;9(17):9584-9593. doi: 10.1039/c9ra00285e. eCollection 2019 Mar 22.
Biopolymer template synthesis has attracted extensive interest for fabricating highly porous metal oxide nanostructures. In this report, a green template-based approach for the synthesis of three-dimensional (3D) NiO nanostructures assembled from porous NiO nanoplates is introduced using a konjac glucomannan (KGM) template. The Ni-KGM composites, which were formed by the immersion of KGM nanofibrils in nickel nitrate solution, were annealed in air at 600 °C to obtain the highly porous NiO nanoplates. The KGM nanofibrils were used as a sacrificial template, which was combusted at a high temperature for the formation of the porous nanostructures. The gas sensor properties of the porous NiO architecture were systematically investigated with four reduced gases including hydrogen sulfide, ammonia, carbon monoxide and hydrogen. The results indicate that the porous NiO nanoplates show a good detection of hydrogen sulfide with a rapid response and recovery speed at low concentrations.
生物聚合物模板合成法在制备高度多孔的金属氧化物纳米结构方面引起了广泛关注。在本报告中，介绍了一种基于绿色模板的方法，使用魔芋葡甘露聚糖（KGM）模板合成由多孔NiO纳米片组装而成的三维（3D）NiO纳米结构。通过将KGM纳米纤维浸入硝酸镍溶液中形成的Ni-KGM复合材料，在600°C的空气中退火以获得高度多孔的NiO纳米片。KGM纳米纤维用作牺牲模板，在高温下燃烧以形成多孔纳米结构。系统地研究了多孔NiO结构对包括硫化氢、氨、一氧化碳和氢气在内的四种还原气体的气敏特性。结果表明，多孔NiO纳米片对硫化氢具有良好的检测性能，在低浓度下具有快速的响应和恢复速度。
