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Abstrak :
Selama beberapa dekade terakhir, upaya luar biasa telah dilakukan untuk mengembangkan fotokatalis seperti oksida logam terner yang tidak beracun dan murah, mis. CuBi2O4 (CBO). Namun demikian, aplikasi skala besar dari bahan tersebut masih terhalang oleh pemisahan muatan fotogenerasi yang buruk. Oleh karena itu, peningkatan aktivitas fotokatalitik CBO akan dilakukan dengan memodulasi kekosongan oksigen (VO). Pada penelitian ini, modulasi kekosongan oksigen (VO) pada CBO dilakukan dengan metode reduksi kimia sederhana. Di sini, modulasi dievaluasi dengan memvariasikan jenis zat pereduksi. Struktur kristal dicirikan oleh Difraktometri Sinar-X dan sifat spektroskopi yang dicirikan dengan DRS uv-vis, Spektroskopi Photoluminescence dan Spektroskopi Raman. ......During the past several decades tremendous efforts have been made to develop photocatalysts such as a non-toxic and cheap ternary metal oxide, e.g. CuBi2O4 (CBO). Nevertheless, large scale application of such material is still hindered by its poor photogenerated charge separation. Therefore, enhancement of CBO photocatalytic activity will be carried out by modulating its oxygen vacancy (VO). In this work, the modulation of oxygen vacancy (VO) in CBO had been done by simple chemical reduction method. Here, the modulation evaluated by varying the type reducing agents. The crystal structures characterized by X-Ray Diffractometry and the spectroscopic properties characterized with uv-vis DRS, Photoluminescence Spectroscopy and Raman Spectroscopy.

Abstrak :
Raman imaging has long been used to probe the chemical nature of a sample, providing information on molecular orientation, symmetry and structure with sub-micron spatial resolution. Recent technical developments have pushed the limits of micro-Raman microscopy, enabling the acquisition of Raman spectra with unprecedented speed, and opening a pathway to fast chemical imaging for many applications from material science and semiconductors to pharmaceutical drug development and cell biology, and even art and forensic science. The promise of tip-enhanced raman spectroscopy (TERS) and near-field techniques is pushing the envelope even further by breaking the limit of diffraction and enabling nano-Raman microscopy.