用气体吸附BET法测定固体比表面积

[中文适用范围]： 本文件规定了根据 Brunauer、Emmett 和 Teller 方法[1]，通过测量物理吸附气体的量来确定分散（例如纳米粉末）或多孔固体的总体比外部和内部表面积。 基于 2015 年国际纯粹与应用化学联盟 (IUPAC) 建议[3]。 注：对于具有化学异质表面的固体，例如携带金属的催化剂，BET 方法给出总表面积，而表面积的金属部分可以通过化学吸附方法测量。 [外文原描述]： This document specifies the determination of the overall specific external and internal surface area of either disperse (e.g. nano-powders) or porous, solids by measuring the amount of physically adsorbed gas according to the method of Brunauer, Emmett and Teller method, [1] based on the 2015 International Union for Pure and Applied Chemistry (IUPAC) recommendations [3] . NOTE For solids exhibiting a chemically heterogeneous surface, for example, metal-carrying catalyst, the BET method gives the overall surface area, whereas the metallic portion of the surface area can be measured by chemisorption methods.