TiO 2 具有两种物理化学性质不同的主要多晶型物，即锐钛矿和金红石。锐钛矿的光催化活性比金红石更强，但热力学稳定性较低。 应用 TiO 2 纳米颗粒被用于研究光催化己烷蒸气降解。它已被用作去除砷的吸附剂。TiO 2 纳米颗粒适合作为光催化剂修复废水中的抗菌成分。它还被用于研究二氧化钛纳米颗粒对DNA寡核苷酸的吸附作用。 Two main physico-chemically distinct polymorphs of TiO 2 are anatase and rutile. Anatase has a higher photocatalytic activity than rutile but is thermodynamically less stable. Application TiO 2 nanoparticles were used to study the photocatalytic hexane vapor degradation. It has been used as a sorbent for arsenic removal. TiO 2 nanoparticles are suitable for remediation of antiseptic components in wastewater by photocatalysis. It has also been used to study adsorption of DNA oligonucleotides by titanium dioxide nanoparticles.