From the perspectives of dye photosensitization,positive ion doping,negative ion doping,and new type composite photocatalyst,it investigates the preparation,photocatalysis mechanism,effects and shortcomings of the concerned material.

The methods to enhance hydrogen production are reviewed,including addition of sacrificial reagent,addition of sodium carbonate,noble metal loading,metal ion doping,anion doping,dye sensitization,semiconductor composition and ion implantation.

To improve electronic conductivity of LiFePO4 by conductive carbon coating and metal particle or ion doping has b.

Through analysing the making process of the heating type thick film sensors by mixing the ion doping into WO 3 and combining TPD and semiconductor analysis,the effect of the doping ion on the properties of O 3 sensors is studied.

On the basis of analyzing crystal structure and coloring mechanism of the cobalt blue pigment, new kinds of complex cobalt blue pigments with excellent reflectivity properties were synthesized by using the chemical coprecipitation method to draw Zn2+,Mg2+ and La3+, Y3+ doping cations into CoAl_2O_4 crystal cell.

Different amounts of Zn2+-doped titania powders were prepared by the Sol-gel method.