A polyoxometalate-doped solid-state luminescent nanomaterial and its preparation method and application
A technology of polyoxometalates and solid-state luminescence, which is applied in luminescent materials, chemical instruments and methods, light water/sewage treatment, etc., can solve the problems of relatively few studies on photoluminescence performance, and achieve enhanced photocatalytic performance , the effect of broad application prospects
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Embodiment 1
[0038] A polyoxometalate-doped solid-state luminescent nanomaterial PMo 12 / CeF 3 The preparation method comprises the following steps:
[0039] 1) Add 0.130 g of Ce(NO 3 ) 3 ·6H 2 O (0.299 mmol), 0.050 g of PVP (polyvinylpyrrolidone), 0.151 g of KBF 4 (1.199 mmoL) and 0.050 g α-PMo 12 (0.026 mmol) was placed in a 25 mL reaction kettle, and 18.5 mL of distilled water was added, and stirred vigorously at room temperature for 30 min to obtain a mixed solution;
[0040] 2) Transfer the reactor to an oven, raise the temperature to 140 °C at a rate of 1.2 °C per minute, and increase the pressure in the reactor to 149 KPa at a rate of 26 KPa / h. After the autoclave was naturally and slowly cooled to room temperature, a yellow precipitate was obtained. The precipitate was centrifuged at a rate of 2500 r / pm for 10 min, and then mixed with 2 mL of deionized water and ethanol (V H2O :V CH3CH2OH = 1:1) washed three times, then dried overnight at 60 °C to finally obtain PMo 12...
Embodiment 2
[0042] A polyoxometalate-doped solid-state luminescent nanomaterial SiW 12 / CeF 3 The preparation method comprises the following steps:
[0043] 1) Add 0.130 g Ce(NO 3 ) 3 ·6H 2 O (0.299 mmol), 0.050 g of PVP, 0.151 g of KBF 4 (1.199 mmoL) and 0.015 g α-SiW 12 (0.005 mmoL) was placed in a 25 mL reaction kettle, 19 mL of distilled water was added, and after stirring vigorously at room temperature for 35 min, a mixed solution was obtained;
[0044] 2) Transfer the reactor to an oven, raise the temperature to 180 °C at a rate of 1.6 °C per minute, and increase the pressure in the reactor to 163 KPa at a rate of 35 KPa / h, keep the constant temperature and pressure for 12 h, and the high pressure reaction After the autoclave was naturally and slowly cooled to room temperature, a yellow precipitate was obtained. The precipitate was centrifuged at 2500 r / pm for 5 min to obtain the precipitate, and then mixed with 3 mL of deionized water and ethanol (V H2O :V CH3CH2OH =2:1...
Embodiment 3
[0046] A polyoxometalate-doped solid-state luminescent nanomaterial PW 12 / CeF 3 The preparation method comprises the following steps:
[0047] 1) Add 0.130 g Ce(NO 3 ) 3 ·6H 2 O (0.299 mmol), 0.050 g of PVP, 0.151 g of KBF 4 (1.199 mmoL) and 0.040 g α-PW 12 (0.014 mmoL) was placed in a 25 mL reactor, added 20 mL of distilled water, and stirred vigorously at room temperature for 25 min to obtain a mixed solution;
[0048] 2) Transfer the reactor to an oven, raise the temperature to 120 °C at a rate of 1 °C per minute, increase the pressure in the reactor to 141 KPa at a rate of 21 KPa / h, keep the constant temperature and pressure for 12 h, and then react under high pressure After the autoclave was naturally and slowly cooled to room temperature, a yellow precipitate was obtained. The precipitate was centrifuged at 2500 r / pm for 10 min to obtain the precipitate, and then mixed with 5 mL of deionized water and ethanol (V H2O :V CH3CH2OH =3:1) washed three times, then...
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