Vapor phase method for preparation of porous carrier supported nitrogen doped titanium dioxide
A technology of porous carrier and titanium dioxide, which is applied in the field of photocatalytic materials, can solve the problems of complex preparation process, high preparation cost, and difficulty in batch production, and achieve the effects of fine and uniform loaded particles, simple preparation method, less separation and less pollution
Active Publication Date: 2014-12-31
YANGZHOU UNIV
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Problems solved by technology
These methods all have the disadvantages of complex preparation process, high cost, many by-products, and serious pollution.
Although the traditional vapor deposition method has the advantages of preparing highly active supported titanium dioxide catalysts, the preparation cost is expensive and it is difficult to produce in batches
Method used
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Embodiment 1
[0024] Seal the kettle and place it in an oven, treat it at 100°C for 24 hours, cool it and take out the powder, put it in a muffle furnace for calcination at 400°C for 6 hours, and prepare a diatomite-supported nitrogen-doped titanium dioxide composite material with visible light absorption sideband peaks 450nm. UV-Vis absorption spectroscopic analysis such as figure 1 shown in .
[0025] Example 2:
Embodiment 2
[0027] Example 3:
Embodiment 3
[0029] Example 4:
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The invention relates to a vapor phase method for preparation of porous material supported nitrogen doped titanium dioxide. The method is as below: mixing the porous material with a nitrogen source, wherein the mass fraction of nitrogen source to porous material is 1:5:1; placing the mixed powder on the upper part of a reaction vessel, and placing a titanium source in the lower part of the reaction vessel; sealing the reaction vessel and placing the reaction vessel in an oven into for high-temperature heat treatment; removing the reaction vessel and cooling; placing the powder into a Muffle furnace for high temperature roasting; and cooling and taking out the reaction product to obtain the porous material supported nitrogen doped titanium dioxide. The invention overcomes the defects of a traditional physical load process and chemical load method, such as complex technology, high cost, multiple by-products and serious pollution. The invention has the advanategs of high load rate, strong binding force, fine and uniform load particles, simple the preparation method, low cost, easy separation of products and raw materials and less pollution.
Description
technical field [0001] The invention belongs to the field of photocatalytic materials, in particular to a method for preparing nitrogen-doped titanium dioxide loaded on a gas-phase method porous carrier. Background technique [0002] There are only 5% ultraviolet light in sunlight, and the rest is visible light. In order to effectively utilize solar energy in photocatalytic reactions, it is very important to develop photocatalysts with visible light activity. Titanium dioxide has the advantages of low cost, good chemical stability, safety, non-toxicity, and no secondary pollution. And for photoelectric conversion. However, on the one hand, titanium dioxide has a wide band gap (Eg=3.2eV), can only absorb ultraviolet light, and has low solar energy utilization, while artificial ultraviolet light sources have the disadvantages of large power consumption, expensive equipment, and poor stability; on the other hand, The holes and electrons formed by light excitation are easy to...
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Inventor 程志林蒋胜花刘赞
Owner YANGZHOU UNIV