Preparation method of graphene/iron/titanium dioxide composite photocatalyst
A titanium dioxide and graphene technology, applied in catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low photocatalytic efficiency and small specific surface area, and achieve The production method is simple, the specific surface area is increased, and the feasibility is high.
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Embodiment 1
[0029] (1) Preparation of titanium dioxide nanotubes:
[0030] By weight, take 1 part of P25 type nano-titanium dioxide (see its SEM picture image 3 Shown) is dispersed in 80 parts of sodium hydroxide solution with a concentration of 10mol / L, stirred by magnetic force for 0.4-0.6h, placed in a reaction kettle, reacted at a constant temperature of 150°C for 48h in an electric constant temperature blast drying oven, cooled to room temperature, Low-temperature drying at 60° C. for 24 hours, calcination in a muffle furnace at 450° C. for 2 hours, wherein the heating rate is 5° C. per minute, to obtain titanium dioxide nanotubes.
[0031] (2) Preparation of iron / titanium dioxide nanotubes by impregnation method:
[0032] By weight, 19.5 parts of FeCl 3 ·6H 2 The O solid is mixed with 80 parts of titanium dioxide nanotubes prepared in step (1), and added to 3200 parts of hydrochloric acid solution with a concentration of 0.1mol / L to prepare a precursor mixed solution, which is t...
Embodiment 2
[0038] (1) Preparation of titanium dioxide nanotubes:
[0039]According to parts by weight, take 1 part of P25 nano-titanium dioxide and disperse it in 100 parts of sodium hydroxide solution with a concentration of 10mol / L, place it in a reaction kettle after magnetic stirring for 0.4-0.6h, and place it in an electric heating constant temperature blast drying oven for 150 ℃ constant temperature reaction for 48 hours, cooled to room temperature, low-temperature drying at 60 ℃ for 20 hours, and calcined in a muffle furnace at 450 ℃ for 2 hours, wherein the heating rate was 5 ℃ per minute to obtain titanium dioxide nanotubes.
[0040] (2) Preparation of iron / titanium dioxide nanotubes by impregnation method:
[0041] By weight, 27 parts of FeCl 3 ·6H 2 The O solid is mixed with 80 parts of titanium dioxide nanotubes prepared in step (1), and added to 3200 parts of hydrochloric acid solution with a concentration of 0.1mol / L to prepare a precursor mixed solution, which is then ul...
Embodiment 3
[0045] (1) Preparation of titanium dioxide nanotubes:
[0046] In parts by weight, take 1 part of P25 nano-titanium dioxide and disperse it in 90 parts of sodium hydroxide solution with a concentration of 10mol / L, place it in a reaction kettle after magnetic stirring for 0.4-0.6h, and place it in an electric heating constant temperature blast drying oven for 150 ℃ constant temperature reaction for 48 hours, cooled to room temperature, dried at low temperature, and calcined in a muffle furnace to obtain titanium dioxide nanotubes.
[0047] (2) Preparation of iron / titanium dioxide nanotubes by impregnation method:
[0048] By weight, 3.5 parts of FeCl 3 ·6H 2 O solid is mixed with 80 parts of step (1) prepared titanium dioxide nanotubes, and adding 3200 parts of concentration is in the hydrochloric acid solution of 0.1mol / L, makes the precursor mixed solution, then carries out ultrasonic dispersion successively, stirs under room temperature, Drying at low temperature until dr...
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