Ionic liquid-assisted novel method for preparing Pt/TiO2 catalyst and application of ionic liquid
A technology of ionic liquids and catalysts, applied in the field of materials, can solve problems such as complex steps, and achieve the effects of rich oxygen vacancies, surface heteroatom doping, and small crystal size
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Embodiment 1
[0040] Pt / TiO of this example 2 The synthesis method is as follows:
[0041] Synthesis of Pt / TiO 2 The ionic liquid used is 1-ethyl-3-methylimidazole tetrafluoroborate (EmimBF 4 ), as shown in formula (II).
[0042]
[0043] 6.25mg chloroplatinic acid hexahydrate (H 2 PtCl 6 ·6H 2 O) Dissolve in a mixture of 1.25g 1-ethyl-3-methylimidazole tetrafluoroborate and 1.25g deionized water, add 1mL tetrabutyl titanate dropwise while stirring vigorously, and transfer the above mixture into In a 15mL autoclave, the reaction was stirred at 150°C for 12h. After the reaction, the reaction kettle was naturally cooled to room temperature, the reaction suspension was centrifuged to obtain a solid, and the obtained solid was thoroughly washed with deionized water 5 times, and dried under vacuum at 80°C overnight to obtain the final product.
[0044] The obtained products were characterized by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, and ...
Embodiment 2
[0049] Pt / TiO of this example 2 The synthesis method is as follows:
[0050] Synthesis of Pt / TiO 2 The ionic liquid used is 1-ethyl-3-methylimidazole chloride (EmimCl), as shown in formula (III).
[0051]
[0052] 6.25mg chloroplatinic acid hexahydrate (H 2 PtCl 6 ·6H 2 O) Dissolve in a mixture of 1.25g 1-ethyl-3-methylimidazole chloride salt and 1.25g deionized water, add 1mL tetrabutyl titanate dropwise with vigorous stirring, and transfer the above mixture into a 15mL autoclave The reaction was stirred at 150°C for 12h. After the reaction, the reaction kettle was naturally cooled to room temperature, the reaction suspension was centrifuged to obtain a solid, and the obtained solid was thoroughly washed with deionized water 5 times, and dried under vacuum at 80°C overnight to obtain the final product.
[0053] The resulting product was characterized by X-ray diffraction, the results are as follows Figure 5 As shown, the resulting product is anatase TiO 2 (JCPDS card no.21-1272). ...
Embodiment 3
[0057] Pt / TiO of this example 2 The synthesis method is as follows:
[0058] Synthesis of Pt / TiO 2 The ionic liquid used is 1-ethyl-3-methylimidazole bromide (EmimBr), as shown in formula (IV).
[0059]
[0060] 6.25mg chloroplatinic acid hexahydrate (H 2 PtCl 6 ·6H 2 O) Dissolve in a mixture of 1.25g 1-ethyl-3-methylimidazole bromide and 1.25g deionized water, add 1mL tetrabutyl titanate dropwise with vigorous stirring, and transfer the above mixture into a 15mL autoclave The reaction was stirred at 150°C for 12h. After the reaction, the reaction kettle was naturally cooled to room temperature, the reaction suspension was centrifuged to obtain a solid, and the obtained solid was thoroughly washed with deionized water 5 times, and dried under vacuum at 80°C overnight to obtain the final product.
[0061] The resulting product was characterized by X-ray diffraction, the results are as follows Figure 8 As shown, the resulting product is anatase TiO 2 (JCPDS card no.21-1272).
[0062] ...
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