Preparation method of ultrathin bismuth oxyiodide photocatalyst and application thereof
A technology of photocatalyst and bismuth oxyiodide, which is applied in the direction of physical/chemical process catalyst, chemical instrument and method, chemical/physical process, etc., can solve the problems of complex synthesis method and effect to be improved, and achieve simple method and improve photocatalytic performance. Performance, the effect of improving photocatalytic activity
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[0033] Second aspect, the present invention provides a kind of preparation method of ultrathin bismuth oxyiodide photocatalyst, wherein, this method comprises the following steps:
[0034] (1) The compound containing bismuth element is mixed with water to obtain mixture A;
[0035] (2) preparation contains the alcohol solution B of I element;
[0036] (3) Add the alcohol solution B of the compound containing I element dropwise to the mixture A for reaction, and add a certain amount of surfactant after stirring for a certain period of time;
[0037] (4) washing and drying the reactant obtained in step (3);
[0038] According to the preparation method of the present invention, the amount of the compound containing bismuth element can be in a relatively wide range, without special limitation, as long as it is ensured that the compound containing element I in the prepared ultrathin bismuth oxyiodide photocatalyst and the compound containing bismuth The molar ratio of the content...
Embodiment 1
[0055] This example is to illustrate the ultra-thin BiOI photocatalyst prepared by the preparation method of the present invention and its application.
[0056] Weigh 2mmol of bismuth nitrate pentahydrate and dissolve it in 20mL of distilled water with an analytical balance, dissolve 1mmol of potassium iodide in 20mL of ethylene glycol and add 0.4mg of surfactant N-methylpyrrolidone, then use a rubber dropper to dissolve the Ethylene glycol solution was added dropwise at a rate of 1.5 mL / min to the aqueous solution containing bismuth nitrate pentahydrate, and after magnetic stirring at a stirring rate of 60 rpm at room temperature for 10 h, the precipitate was cleaned and collected; The precipitate was dried in an oven at 70 °C for 10 h to obtain a solid powder, that is, an ultrathin BiOI photocatalyst.
[0057] And the ultrathin BiOI photocatalyst was characterized by TEM, such as figure 1 shown, from figure 1 It can be seen that the catalyst is in powder form with a thickn...
Embodiment 2
[0061] This example is to illustrate the ultra-thin BiOI photocatalyst prepared by the preparation method of the present invention and its application.
[0062] Weigh 1.8mmol of bismuth nitrate pentahydrate and dissolve it in 25mL of distilled water with an analytical balance, dissolve 1mmol of potassium iodide in 15mL of ethylene glycol and add 0.4mg of surfactant N-methylpyrrolidone, then use a rubber-tip dropper to dissolve the above-mentioned compound The ethylene glycol solution was added dropwise into the above-mentioned aqueous solution containing bismuth nitrate pentahydrate at a rate of 2 mL / min, and after magnetic stirring at a stirring rate of 90 rpm at room temperature for 9 h, the precipitate was cleaned and collected; The precipitate was dried in an oven at 80 °C for 9 h to obtain a solid powder, that is, an ultrathin BiOI photocatalyst.
[0063] The specific surface area and photocatalytic activity of the ultra-thin BiOI photocatalyst were tested, and the obtain...
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