Foundation Of Photocatalytic Decomposition Water Device And Study Of Several Photocatalysts Properties Of Hydrogen Production

The most important issue mankind facing is to realize the continuable development of economic and society on the 21st century, and the energy security,a harmonious environment is a necessary condition for sustainable development. Hydrogen energy as the only non-polluting renewable energy sources is undoubtedly the widely used source of energy after the non-renewable energy, such as oil, coal and natural gas in the future. Among the many instruments of developing hydrogen energy, using solar for photocatalytic decomposition of hydrogen from water system is the most ideal and the most promising means of the development of hydrogen energy which can balance energy, resources and the environment.This paper aims at foundation of photocatalytic decomposition water device and study of several photocatalysts properties of hydrogen production, in the light of previous studies in more concentrated in the study of the photo-catalyst modified, less people on the outside of the reaction conditions, our research paper, on the basis of the methods of photocatalytic decomposition water to hydrogen and experimental system, preliminary explored and realized the external conditions of photocatalytic splitting water to hydrogen experimentThe first part started on the ways to achieve photocatalytic decomposition water to hydrogen, then it introduced the principle, the factors of affecting the efficiency of the photolysis of water, as well as the development of catalysts for water splitting, so as to the purpose of the present paper and its significance.The second part introduced that it's the first time in the laboratory we carried out the photocatalytic hydrogen research, designed and build a set of internal radiation source photocatalytic hydrogen production system, which can control the reaction temperature, accurately measure the gas output, and can link chomatographic detection device very well for easy detecting the components of gas.The third part, we used the common Degussa P25 as the photocatalyst to study respectively on the amount of hydrogen production of amount of photocatalyst, different types of sacrifices (hole scavenger), different concentrations of the same hole scavenger, different light intensities on the P25 photocatalyst.The fourth part, we used the tetrabutyl titanate as a source of titanium to synthesis Si/Ti= 4 different calcined temperature of the silicon compound titanium mesoporous materials using citric acid synthesis routes, and tested characters of samples by XRD, IR, N2 Adsorption - Desorption curves and UV-Vis means. And we discussed optical decomposition of hydrogen aquaculture of a 250W high-pressure mercury lamp as the UV source, the 0.1 M and 0.04 M Na2S the Na2SO3 as hole scavenger. This low ratio of silicon titanium composite mesoporous materials in optical decomposition of hydrogen aquaculture experiment has shown good activity, and in high calcined temperature, the catalyst remains stable structure.The fifth part, we used the tetrabutyl titanate as a source of titanium respectively to synthesis one-step and two-step synthesis of Ti-SBA-15, different TiO2 load of Ti-SBA-15; and the one-step synthesis of the TiO2 load MCM-41, and we firstly used titanium dioxide doped in the MCM-41 Preparation Methods to make TiO2 load in the MCM-22 group microporous zeolites. We tested characters of samples by XRD, IR, N2 Adsorption - Desorption curves and UV-Vis means and discussed optical decomposition of hydrogen aquaculture of a 250W high-pressure mercury lamp as the UV source, the 0.1 M and 0.04 M Na2S the Na2SO3 as hole scavenger. The experimental results show that, TiO2 load in the zeolite MCM-22 group of photocatalytic hydrogen production activity is superior to load in the MCM-41 molecules, as we further study microporous zeolites do photocatalyst vector synthesis laid the foundation.