Tailored boron phosphate monolithic foam with multimodal hierarchically porous structure and its applications  

作　　者：Qiuwen Liu Qiang Liu Yawei Wu Renyou Zeng Fangshu Xing ChuChu Cheng Huibin Qiu Caijin Huang 

机构地区：[1]State Key Laboratory of Photocatalysis on Energy and Environment,College of Chemistry,Fuzhou University,Fuzhou 350116,China [2]School of Chemistry and Chemical Engineering,Frontiers Science Center for Transformative Molecules,State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China [3]Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341000,China

出　　处：《Nano Research》2022年第7期6695-6704,共10页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.22072024).

摘　　要：The synthesis of multimodal hierarchically porous materials is of great challenge by facile approach.Herein,we assemble BPO_(4) hollow spheres into macroscopic foam materials with multimodal hierarchically porous structure by combining down-to-up process and Ostwald ripening effect.Tailored monolithic B_(2)O_(3)@BPO_(4) foams were obtained from a sticky hydrogel precursor by a one-step annealing process.The foam has the self-supporting frame of BPO_(4) hollow spheres with covering B_(2)O_(3) nanowires and shows excellent permeability and relatively high surface area due to hierarchical structure.The formation mechanism of monolithic B_(2)O_(3)@BPO_(4) foams mainly undergoes inflation,particle aggregation,and Ostwald ripening process.Monolithic foams exhibit superior catalytic activity in oxidation dehydrogenation of alkanes due to the sufficient exposure of active sites over the special frame structure.Furthermore,various monolithic functionalized BPO_(4) foam composites can be easily synthesized and exhibit superior performance in different applications including the oxidation of carbon monoxide,and the self-driven removal of organic pollutants.More interestingly,we also found the sticky hydrogel precursor possesses good heat shielding effect.This work provides a new insight for constructing multimodal hierarchically porous materials with the remaining superior property of nanoscale to cope with various challenges.

关 键 词：multimodal hierarchically porous materials tailored monolithic foam sticky hydrogel SELF-SUPPORTING hollow spheres 

分 类 号：TB3[一般工业技术—材料科学与工程]