五元
材料科学
金属
氧化物
三元运算
煅烧
介孔材料
无机化学
水溶液中的金属离子
化学工程
甲醇
有机化学
催化作用
化学
程序设计语言
冶金
复合材料
工程类
合金
计算机科学
作者
Gen Wang,Xinran Zhou,Jing Qin,Yan Liang,Bingxi Feng,Yonghui Deng,Yongxi Zhao,Jing Wei
标识
DOI:10.1021/acsami.9b08694
摘要
Metal oxide hollow spheres (MOHSs) with multicomponent metal elements exhibit intriguing properties due to the synergistic effects of different components. However, it remains a great challenge to develop a general method to synthesize multicomponent MOHSs due to the different hydrolysis and condensation rates of precursors for different metal oxides. Herein, we demonstrate a general strategy for the controllable synthesis of MOHSs with up to five metal elements by decomposition of metal-phenolic coordination polymers (MPCPs), which are prepared by chelation of tannic acid with various metal ions. After calcination to burn out the organic component and induce heterogeneous contraction of MPCPs, a series of MOHSs with multishell structure, high specific surface area (55–171 m2/g), and crystalline mesoporous framework are synthesized, including binary (Fe–Co, Ni–Zn, and Ni–Co oxides), ternary (Ni–Co–Mn and Ni–Co–Zn oxides), and quinary (Ni–Co–Fe–Cu–Zn oxides) MOHSs. The gas sensing nanodevices based on quinary MOHSs show much higher response (10.91) than those based on single component toward 50 ppm of ethanol at 80 °C with the response/recovery time of 85/160 s. The quinary oxides sensor also displays high selectivity toward ethanol against other interfering gases (e.g., methanol, formadehyde, toluene, methane, and hydrogen) and long-term stability (∼94.0% after 4 weeks), which are extremely favorable for practical applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI