材料科学
兴奋剂
金红石
X射线光电子能谱
带隙
可见光谱
吸收光谱法
分析化学(期刊)
光催化
光电子学
化学工程
光学
化学
催化作用
工程类
物理
生物化学
色谱法
作者
R. B. Mane,Ramkrishna Sahoo,Kumaar Swamy Reddy B,Vijay Ravula,Bharat B. Panigrahi,Pramod H. Borse,Dibyendu Chakravarty
摘要
Abstract Thermal decomposition of Ti 3 GeC 2 MAX phase at 1773 K yields an orange‐colored titania powder. Micro‐XRD of the powder under oscillation mode reveals a pure rutile phase ( space group P42/ mnm ). X‐ray photoelectron spectroscopy confirmed substitutional doping of Ge in the titania lattice. The presence of Ti‐O‐Ge bond was observed in O 1s spectrum and confirmed by the shift in binding energy in Ti 2p 3/2 and Ge 3d peaks. The UV‐visible Diffuse Reflectance Spectrum studies on the Ge‐doped titania powder show wide absorption in the visible region (380 to 650 nm) yielding a bandgap of 2.83 eV, which is desirable for photocatalytic applications. Defect states formed due to Ge doping led to lowering of the titania conduction band inducing an orange coloration in the powder.
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