本文件规定了用于光催化应用的粉末或悬浮液形式的纳米级二氧化钛（TiO2）的要求和相应的测试方法。 本文件适用于用于光催化应用的改性纳米级二氧化钛。 笔记？这种改性可以是表面处理、涂覆、掺杂及其组合。

This document specifies requirements and corresponding test methods for nanoscale titanium dioxide (TiO₂) in either powder or suspension form for photocatalytic application. This document is applicable to modified nanoscale titanium dioxide for photocatalytic application. NOTE？Such modification can be surface treatment, coating, doping and combination thereof.