| Dyeing and printing industry is a bigger industry textile industry water use, water as media to participate in the dyeing and finishing process. Printing and dyeing wastewater quantity is big, high chroma, complicated composition, waste water containing dye, sizing agent, additives, oil, acid and alkali, fiber impurities and inorganic salts, dyestuff structure of nitro and amino compounds and heavy metals such as copper, chromium, zinc, arsenic element has higher biological toxicity, serious environmental pollution.Adsorption is one of the most efficient ways to treat waste water, for its high efficiency, fast adsorption speed and good adaptability, etc. To find the appropriate adsorbent is the priority work in environmental heavy metal waste water control. As a new type of high efficiency adsorbent, ordered mesoporous carbon materials (OMC) has specific high BET surface area and pore volume, meanwhile its mechanical stability and thermal stability is excellent.OMC is easy to functionalization for its rich surface hydroxyl and is a quite promissing adsorbent.Increasing the content of CO2 in the earth’s atmosphere in recent years, has become a main cause of the greenhouse effect. With solar energy as the direct driving force of light catalytic conversion technology is one of the ideal way to convert CO2effectively. Realize resource conversion of CO2, on the one hand, can produce organic fuel, synthesis of other organic chemical raw materials, intermediates or organic chemical products, at the same time also can reduce by other chemical reaction and pollution to the environment, therefore has the vital significance.TiO2 photocatalytic technology has a big advantage, but in the process of practical application, there are also many problems:(1) the quantum efficiency is low, optical electronic-hole easily compound; (2) the band gap is higher (3.2 eV), can use only 3-5% of the solar energy activation of catalyst; (3) small specific surface area, adsorption ability is poor; (4) particle size is small, more difficult to recycle and reuse rate is low. Through the modification of TiO2 preparation, therefore, more excellent performance of TiO2 composite photocatalytic materials, to overcome the problems existing in the application of, is the current hot research topic in the field of photocatalytic oxidation technology. This experiment adopts the load type titanium dioxide composite material, to find good adsorption and degradation of the catalyst.This paper based on the above two applications, mainly to do the following work.We introduce a novel method to synthesize graphitic ordered mesoporous carbon materials by a simple one-step solid-li quid grinding/templating route using SBA-15 as a hard template.We described the preparation proce ss of a new type of Ag doped graphitic ordered mesoporous carbon supported T1O2 used for photocatalytic reduction of carbon dioxide with water to organic fuel s under simulated solar irradiation, and use The catalyst for light degradation of rhodamine B wastewater.Metallic silver content in the composite catalyst in this paper by changing the amount of inspection and screening the best with visible light response of the activity of the highest composite catalyst metallic silver doped in graphitization of mesoporous carbon content there is a optimal value, when the doping amount is less than the best value, the doping ions provide capture trap quantity is not much, at this time of electronic-hole recombination suppression ability is weaker, it is difficult to achieve the best photocatalytic activity; When doping amount is greater than the optimum value after adding quantity increased to a certain degree, when the silver to add accumulation on the surface of TiO2 grain, doping ions may be transformed into electrons and holes of composite center, reduce light gave birth to the number of electrons and holes, thereby reducing the efficiency of photocatalytic reaction. |
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