Chen Chunhong, Mao Shanjun, Tan Chaoliang, Wang Zhe, Ge Yiyao, Ma Qinglang, Zhang Xiao, Qi Guodong, Xu Jun, Fan Zhanxi, Wang Yong
Advanced Materials and Catalysis Group, Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China.
Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Angew Chem Int Ed Engl. 2021 Jul 5;60(28):15556-15562. doi: 10.1002/anie.202104028. Epub 2021 Jun 7.
Hybrid nanomaterials with controlled dimensions, intriguing components and ordered structures have attracted significant attention in nanoscience and technology. Herein, we report a facile and green polyoxometallate (POM)-assisted hydrothermal carbonization strategy for synthesis of carbonaceous hybrid nanomaterials with molecularly dispersed POMs and ordered mesopores. By using various polyoxometallates such as ammonium phosphomolybdate, silicotungstic acid, and phosphotungstic acid, our approach can be generalized to synthesize ordered mesoporous hybrid nanostructures with diverse compositions and morphologies (nanosheet-assembled hierarchical architectures, nanospheres, and nanorods). Moreover, the ordered mesoporous nanosheet-assembled hierarchical hybrids with molecularly dispersed POMs exhibit remarkable catalytic activity toward the dehydration of tert-butanol with the high isobutene selectivity (100 %) and long-term catalytic durability (80 h).
具有可控尺寸、有趣组分和有序结构的杂化纳米材料在纳米科学与技术领域引起了广泛关注。在此，我们报道了一种简便、绿色的多金属氧酸盐（POM）辅助水热碳化策略，用于合成具有分子分散POM和有序介孔的碳质杂化纳米材料。通过使用各种多金属氧酸盐，如磷钼酸铵、硅钨酸和磷钨酸，我们的方法可以推广到合成具有不同组成和形态（纳米片组装的分级结构、纳米球和纳米棒）的有序介孔杂化纳米结构。此外，具有分子分散POM的有序介孔纳米片组装分级杂化物对叔丁醇脱水表现出显著的催化活性，具有高异丁烯选择性（100%）和长期催化耐久性（80小时）。
