Solid heteropoly acid salt composite multi-component catalyst enhanced by surface modification, preparation method and applications thereof
A co-catalyst and multi-component composite technology, which is applied in the preparation of carbon-based compounds, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of low solar energy utilization, research on unaromatic alcohols, and inability to achieve a wide range of applications. , No secondary pollution, the effect of improving catalytic performance
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Embodiment 1
[0058] 1g phosphotungstic heteropoly acid (H 3 PW 12 o 40 , referred to as HPW) dissolved in 50mL deionized water and stirred vigorously, 0.037g NH 4 Cl was dissolved in 10 mL deionized water as a counter ion source, and NH 4 The Cl solution was added dropwise to the HPW solution, and a milky white precipitate was formed immediately, and magnetic stirring was continued for 2 hours, then the resulting suspension was evaporated to dryness, and the white powder obtained was placed in a tube furnace under N 2 Calcined at 400°C for 2 hours in the atmosphere, the obtained solid-phase heteropolyacid precursor is marked as NH 4 PW;
[0059] Take 0.5g NH 4 PW was suspended in benzotrifluoride, 40 mg of acid orange II dye and 5 mg of TEMPO were added sequentially, stirred vigorously at room temperature for 12 hours, centrifuged, and dried in vacuum to obtain a solid heteropolysalt composite photocatalyst modified by dye and TEMPO, marked as NH 4 PW-OrgII-TEMPO.
[0060] As a bla...
Embodiment 2
[0065] 1g phosphotungstic heteropoly acid (H 3 PW 12 o 40 , referred to as HPW) was dissolved in 50mL deionized water and stirred vigorously, 0.135g CsCl (or 0.052g KCl, or 0.118g AgNO 3 ) was dissolved in 10mL deionized water as a counter ion source, and the counter ion source solution was added dropwise to the HPW solution at room temperature to form a milky white precipitate, and magnetic stirring was continued for 2 hours, and then the resulting suspension was spun to dryness, and the resulting white powder The body is placed in a tube furnace at N 2 The solid-phase heteropolyacid precursors obtained by calcination at 400°C for 2 hours in the atmosphere are respectively marked as CsPW, KPW or AgPW;
[0066] Suspend 0.5 g of the calcined solid-phase heteropolyacid precursor in trifluorotoluene, add 40 mg of Acid Orange II dye and 5 mg of TEMPO in sequence, stir vigorously at room temperature for 12 hours, centrifuge, and dry in vacuo to obtain the combined modification o...
Embodiment 3
[0070] 1g phosphotungstic heteropoly acid (H 3 PW12 o 40 , referred to as HPW) dissolved in 50mL deionized water and stirred vigorously, 0.037g NH 4 Cl was dissolved in 10 mL of deionized water as a counter ion source. NH 4 The Cl solution was added dropwise to the HPW solution, and a milky white precipitate was formed immediately, and magnetic stirring was continued for 2 hours, then the resulting suspension was evaporated to dryness, and the white powder obtained was placed in a tube furnace under N 2 Calcined at 200°C, 300°C, 400°C, and 500°C for 2 hours in the atmosphere to obtain NH 4 PW;
[0071] Take 0.5g of NH after calcined at different temperatures 4 PW was suspended in benzotrifluoride, 40 mg of acid orange II dye and 5 mg of TEMPO were added sequentially, vigorously stirred at room temperature for 12 hours, centrifuged, and dried in vacuum to obtain a solid heteropolysalt composite photocatalyst modified by dye and TEMPO.
[0072] Add 20 mg of composite photo...
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