Preparation Of Nano TiO₂Doping And Research Of Selective Photocatalytic

With the rapid development of industrial civilization advances and society, environment andenergy issues become the21st century’s first problem to be solved, seriously hampered thesustainable development of human civilization. Refers to the use of photocatalytic, semiconductoruse solar itself to excited electron holes move to the surface of the catalyst such as hydroxyl radicalsand react with organic matter, degradation of organic pollutants, since the catalytic method is toapply the semiconductor powder or granules, with high efficiency and will not cause secondarypollution, a new direction for environmental governance.Compared to other light catalytic synthesisof modified work, selective photocatalytic is one of the most challenges of the new century, both forgeneral treatment of pollutants can be obtained intermediates and mixed contaminant screening, andthe direction of the current research is scarce, so this issue is of great research value. Transitionmetal oxides TiO2with nontoxic, high catalytic efficiency, their stability, low cost, etc., is an idealphotocatalyst materials with great prospects, thus causing a huge interest in researchers. TiO2although there have been decades of research history, but compared with some otherphotocatalysts,it is still the most promising photocatalytic materialsThis topic prepared TiO2to regulate its surface structure, different in clear crystal in differentroles by regulating its photocatalytic crystal and exposure to research its photocatalytic selectiveexposure to supplement. In different directions and different atomic adsorption with group tochange its surface chemical states, comprehensive study of the TiO2surface structure and chemicalstates of changes affect the performance of its photocatalytic choice, from the atomic to molecularlevel research on TiO2surface and adsorption of atoms or groups and content among the reactionprocess and degradation mechanism of implementation is based on the surface structure andchemical states of TiO2photocatalysis selectivity. Research results will have on the surface of thecatalytic chemistry, selective photocatalysis have significant contribution, is of great significance.Research draw some new results:Some preliminary scientific findings and literature havedeveloped a strong anatase TiO2photocatalytic selectivity characteristics, while rutile phase is notsufficiently study found that subjects prepared by N-doped rutile TiO2, get new SelectivePhotocatalytic results.Experimental results show that the TiO2surface structure (including exposureto different directions and different directions exposure ratio) and chemical state (adsorption on thesurface of different atoms and group) effect on the surface adsorption and chemical behavior, putsforward the TiO2surface atoms with organic model and the mechanism of action, reveal the TiO2surface lattice and adsorption of atoms and the relations between and among groups, degradation of analyte molecules and function law of TiO2was achieved by regulating its surface structure andchemical states of selective photocatalysis, choose for exploring new photocatalytic approachesprovide experimental and theoretical basis.