无模板插层-剥离勃姆石合成具有优异稳定性的多孔硅掺杂氧化铝二维纳米片  

Template-free synthesis of highly porous silica-doped alumina with exceptional stability via intercalation-exfoliation of boehmite into two-dimensional nanosheets

作　　者：赵振祥 杨军 王春霖 薛岩涛 吴浩 谢威龙 吴萍萍 王纯正 邢伟 汪毅 庞春霞 庞泉德 王晓化 南军 白鹏 阎子峰 Zhenxiang Zhao;Jun Yang;Chunlin Wang;Yantao Xue;Hao Wu;Weilong Xie;Pingping Wu;Chunzheng Wang;Wei Xing;Yi Wang;Chunxia Pang;Quande Pang;Xiaohua Wang;Jun Nan;Peng Bai;Zifeng Yan(State Key Laboratory of Heavy Oil Processing,CNPC Key Laboratory of Catalysis,College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China;PetroChina Lanzhou Petrochemical Research Center,Lanzhou 730060,China;Shandong Xinbo Chemical Technology Co.,Ltd,Weifang 262404,China;Petrochemical Research Institute,PetroChina Company Limited,Beijing 100195,China;CNOOC Tianjin Chemical Research and Design Institute Co.,Ltd,Tianjin 300131,China)

机构地区：[1]State Key Laboratory of Heavy Oil Processing,CNPC Key Laboratory of Catalysis,College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China [2]PetroChina Lanzhou Petrochemical Research Center,Lanzhou 730060,China [3]Shandong Xinbo Chemical Technology Co.,Ltd,Weifang 262404,China [4]Petrochemical Research Institute,PetroChina Company Limited,Beijing 100195,China [5]CNOOC Tianjin Chemical Research and Design Institute Co.,Ltd,Tianjin 300131,China

出　　处：《Science China Materials》2024年第1期261-271,共11页中国科学（材料科学）（英文版）

基　　金：financially supported by the National Key R&D Program of China (2022YFA1503400);the National Natural Science Foundation of China (21991091);the Key Projects of Shandong Key R&D plan (2019JZZY010506);Taishan Scholar Foundation (tspd20210308);the Petro China Research and Development Projects (2020A-1816 and 2020A-1817)。

摘　　要：高比表面积和大孔容的多孔氧化铝已被广泛应用在各种领域,但不使用有机模板合成多孔氧化铝仍面临巨大挑战.在此,我们报道了基于插层-剥离策略的多孔氧化铝合成方法,利用硅物种削弱勃姆石(氧化铝前体)的层间作用力,从而在不使用有机模板的情况下将勃姆石剥离成二维纳米片.该合成过程可放大到3 L,并获得厚度为2 nm的二维纳米片.此外,这些二维纳米片可组装成比表面为542 m^(2)g^(-1)和孔容为2.43 cm^(3)g^(-1)的勃姆石.在不同温度下对二维纳米片进行热/水热处理得到的多孔氧化铝其孔结构优于多数有机模板法合成的氧化铝,并表现出优异的吸附性能.本研究为合成二维勃姆石纳米片和多孔氧化铝材料提供了一种新策略.Porous alumina with high specific surface area(SSA)and large pore volume(PV)is highly desired in various applications;however,its synthesis without an organic tem-plate faces a great challenge.Herein,we propose a novel template-free strategy based on intercalation-exfoliation with silica to weaken boehmite(alumina precursor)interlayer forces and achieve the exfoliation of boehmite into two-dimensional(2D)nanosheets,which can easily be scaled up.The as-prepared 2D nanosheets with 2-nm thickness could be assembled to form boehmite with 542 m^(2)g^(-1) SSA and 2.43 cm^(3)g^(-1) PV.The porous alumina obtained from the thermal/hydrothermal treatment of the 2D nanosheets at different temperatures possesses a hierarchical porous struc-ture superior to most of the reported alumina synthesized with organic templates,exhibiting excellent performance in the adsorption of large organic molecules.This research provides a new strategy for synthesizing 2D boehmite nanosheets and porous alumina materials,demonstrating great potential in catalysis and adsorption.

关 键 词：多孔氧化铝 纳米片 模板合成 勃姆石 水热处理 层间作用 插层 硅掺杂 

分 类 号：TB383.1[一般工业技术—材料科学与工程]