A kind of three-dimensional hierarchical composite material and its preparation method and application
A composite material and three-dimensional technology, applied in chemical instruments and methods, physical/chemical process catalysts, electrolytic components, etc., can solve the problems of low catalyst activity, easy agglomeration and shedding, and accelerated charge, so as to avoid shedding and activity decay , low equipment and cost requirements, and the effect of reducing contact resistance
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Embodiment 1
[0041] A three-dimensional graded composite material, the preparation method of which comprises the steps of:
[0042]1) Calcining the carbon cloth in the air at 650°C for 10 minutes to remove the surface sizing agent, and washing and drying;
[0043] 2) Sonicate the carbon cloth pretreated in step 1) in a 0.05 mol / L tetrabutyl titanate ethanol solution for 1 hour, then anneal at 400°C in air for 80 minutes, and grow a titanium dioxide seed layer on the surface of the carbon cloth;
[0044] 3) Arrange the carbon with the titanium dioxide seed layer grown in step 2) in the titanium dioxide growth solution (6.2 mol / L hydrochloric acid, 0.13 mol / L tetrabutyl titanate), then hydrothermally react at 200°C for 80 minutes, and then The obtained solid product was annealed at 900°C for 2h in an ammonia atmosphere (heating rate 10°C / min), and a titanium nitride / carbon cloth composite material was obtained;
[0045] 4) Soak the obtained titanium nitride / carbon cloth composite material i...
Embodiment 2
[0050] A three-dimensional graded composite material, the preparation method of which comprises the steps of:
[0051] 1) Calcining the carbon cloth in the air at 500°C for 80 minutes to remove the surface sizing agent, and washing and drying;
[0052] 2) Sonicate the carbon cloth pretreated in step 1) in a 0.03mol / L ethanol solution of titanium tetrachloride for 80 minutes, then anneal at 450°C in air for 70 minutes, and grow a titanium dioxide seed layer on the surface of the carbon cloth;
[0053] 3) Arrange the carbon with the titanium dioxide seed layer grown in step 2) in the titanium dioxide growth solution (6.3 mol / L of hydrochloric acid, 0.08 mol / L of tetrabutyl titanate), then hydrothermally react at 190°C for 90 minutes, and then place The obtained solid product was annealed at 950°C for 1.5h (heating rate 5°C / min) in an ammonia atmosphere to obtain a titanium nitride / carbon cloth composite material;
[0054] 4) Soak the obtained titanium nitride / carbon cloth compo...
Embodiment 3
[0057] A three-dimensional graded composite material, the preparation method of which comprises the steps of:
[0058] 1) Calcining the carbon cloth in the air at 600°C for 30 minutes to remove the surface sizing agent, and washing and drying;
[0059] 2) Sonicate the carbon cloth pretreated in step 1) in a 0.06 mol / L ethanol solution of tetrabutyl titanate for 1 h, then anneal at 550° C. in air for 30 min, and grow a titanium dioxide seed layer on the surface of the carbon cloth;
[0060] 3) Arrange the carbon with the titanium dioxide seed layer grown in step 2) in the titanium dioxide growth solution (6.0 mol / L of hydrochloric acid, 0.17 mol / L of tetrabutyl titanate), and then hydrothermally react at 200°C for 80 minutes, and then place The obtained solid product was annealed at 850°C for 2.5h (heating rate 7°C / min) in an ammonia atmosphere to obtain a titanium nitride / carbon cloth composite material;
[0061] 4) Soak the obtained titanium nitride / carbon cloth composite ma...
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