However excess doped chromium located the interstitial cites in the lattice distorted the original structure and consequently deteriorated the intrinsic photocatalytic activity of titania.

• 而过量掺杂之铬元素则会进入结构中的镶嵌位置，扭曲本质结构的结果会造成二氧化钛原本具有之良好光量子效益降低。