A kind of copper-titanium dioxide core-shell structure composite material and its preparation method and application
A technology of titanium dioxide and composite materials, which is applied in the fields of chemical engineering, photocatalytic material preparation, and functional materials. It can solve the problems of small particles, harsh reaction conditions, easy agglomeration and oxidation, etc., and achieve simple preparation process, convenient operation and high stability. Effect
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Embodiment 1
[0035] A method for preparing a copper-titania core-shell structure composite photocatalytic material, the copper-titania core-shell structure composite photocatalytic material is designed according to the requirement that copper accounts for 20wt% of the composite material, and the specific preparation steps include the following steps:
[0036] 1) Synthesis of octahedral cuprous oxide: 15 mmol of copper acetate monohydrate was added to 20 mL of deionized water and stirred for 2 min at 70 ° C to dissolve, then 10 mL of 9 mol / L sodium hydroxide solution was added, followed by stirring for 5 min, and finally 0.6 g glucose monohydrate powder to obtain a homogeneous mixed solution; the above mixed solution is subjected to a reflux reaction, and the reflux reaction is carried out at 70 ° C for 1 h. After the reaction is completed, centrifugal washing, drying and cooling are performed to obtain octahedral cuprous oxide;
[0037]2) Synthesis of cuprous oxide-titania precursor composi...
Embodiment 2
[0045] A preparation method of a copper-titanium dioxide core-shell structure composite photocatalytic material, the preparation method of the copper-titanium dioxide core-shell structure composite photocatalytic material is designed according to the requirement that copper accounts for 10wt% of the composite material. In step 2), 0.37 mmol of synthesized cuprous oxide was added to 50 mL of ethanol, then 4.5 mmol of tetrabutyl titanate was added, stirred for 2 h, and 20 mL of ethanolic water was added, and the reaction was stirred for 1 h. Cooling to obtain a cuprous oxide-titanium dioxide precursor composite material.
[0046] The product obtained in this example (Cu-TiO 2 -10%) XRD pattern see figure 1 , the obtained product is a copper-titanium dioxide composite material.
[0047] The photocatalytic hydrogen production activity test results of the products obtained in this example are shown in Figure 5 . The results show that the obtained Cu-TiO 2 The activity of the ...
Embodiment 3
[0049] A preparation method of a copper-titanium dioxide core-shell structure composite photocatalytic material, the preparation method of the copper-titanium dioxide core-shell structure composite photocatalytic material is designed according to the requirement that copper accounts for 30wt% of the composite material. In step 2), 1.25 mmol of synthesized cuprous oxide was added to 50 mL of ethanol, then 4.5 mmol of tetrabutyl titanate was added, stirred for 2 h, 20 mL of ethanolic water was added, and the reaction was stirred for 1 h. Cooling to obtain a cuprous oxide-titanium dioxide precursor composite material.
[0050] The product obtained in this example (Cu-TiO 2 -30%) XRD pattern see figure 1 , the obtained product is a copper-titanium dioxide composite material.
[0051] The photocatalytic hydrogen production activity test results of the products obtained in this example are shown in Figure 5 . The results show that the obtained Cu-TiO 2 The activity of the comp...
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