Nano-titanium dioxide photocatalytic composite material and preparation method thereof
A technology of nano-titanium dioxide and composite materials, applied in the field of nano-titanium dioxide photocatalytic composite materials and its preparation, can solve the problems of easy compounding, difficult fixation, loss of specific surface area, etc., and achieve the effect of facilitating adsorption, solving the loss of specific surface area, and promoting improvement
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Embodiment 1
[0027] 1. In a CVD tube furnace, heat 0.7 g of diatomite from room temperature to 1000 °C under the conditions of argon and hydrogen for 60 minutes; keep the supply of argon and hydrogen, and feed methane gas to make the diatomite React at 1000 °C for 90 minutes; stop the supply of methane and hydrogen, let the sample cool down to 300 °C naturally, and then quickly cool down to obtain powder 1.
[0028] 2. Put 0.372 g TiF 4 and 0.03 g Powder 1 (Powder 1 accounted for TiF 4 8.06% of its mass) was dissolved in 70 mL of deionized water, stirred for 20 minutes, poured into the reaction kettle, the hydrothermal temperature was 140 °C, and the holding time was 12 h; after that, the reaction kettle was naturally cooled to obtain a cloudy liquid.
[0029] 3. The turbid liquid is washed several times and dried to prepare a nano-titanium dioxide photocatalytic composite material.
[0030] figure 1 It is the XRD figure of the nano-titanium dioxide photocatalytic composite material tha...
Embodiment 2
[0033] 1. In a CVD tube furnace, 0.3 g of diatomite is heated from room temperature to 1100 °C under the condition of argon and hydrogen, and the heating time is 70 minutes; maintain the supply of argon and hydrogen, and feed methane gas to make the diatomite React at 1100 °C for 100 minutes; stop the supply of methane and hydrogen, let the sample cool down to 200 °C naturally, and then quickly cool down to obtain powder 2.
[0034] 2. Put 18.0 g TiF 4 and 0.18 g Powder 2 (Powder 2 accounted for TiF 4 1% of its mass) was dissolved in 210 mL of deionized water, stirred for 30 minutes, and poured into a reactor with a hydrothermal temperature of 140 °C and a holding time of 12 h; after that, the reactor was naturally cooled to obtain a cloudy liquid.
[0035] 3. The turbid liquid is washed several times and dried to prepare a nano-titanium dioxide photocatalytic composite material.
[0036] The concrete steps of the photocatalytic performance evaluation of nano titanium dioxid...
Embodiment 3
[0040] 1. In a CVD tube furnace, 0.3 g of diatomite is heated from room temperature to 900 °C under the condition of argon and hydrogen, and the heating time is 80 minutes; keep the supply of argon and hydrogen, and feed methane gas to make the diatomite React at 1100 °C for 100 minutes; stop the supply of methane and hydrogen, let the sample cool down to 100 °C naturally, and then quickly cool down to obtain powder 3.
[0041] 2. Add 1.80 g TiF 4 and 0.36 g Powder 3 (Powder 3 accounted for TiF 4 20% of its mass) was dissolved in 70 mL of deionized water, stirred for 40 minutes, poured into the reaction kettle, the hydrothermal temperature was 180 ℃, and the holding time was 5 hours; after that, the reaction kettle was naturally cooled to obtain a turbid liquid;
[0042] 3. The turbid liquid is washed several times and dried to prepare a nano-titanium dioxide photocatalytic composite material.
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