Preparation method of environmentally-friendly formaldehyde degradation photocatalyst
It is a photocatalyst and environment-friendly technology, which is applied in the field of load-type photocatalyst formaldehyde removal. It can solve the problems of high toxicity of scavenger compounds, limited formaldehyde removal effect, and impact on user health. It achieves good physical and chemical stability, excellent mechanical stability, The effect of high load ratio
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Embodiment 1
[0021] (1) Pretreatment of Houttuynia cordata powder: In the reactor, add deionized water: 55 mL, concentrated sulfuric acid: 14 mL, stir well, cool to room temperature, potassium permanganate: 5g, dissolve, then add fish Houttuynia cordata powder: 14g, soak at room temperature for 8 hours, boil for 35 minutes, wash with deionized water until neutral, separate solid and liquid, put the solid into a solution of 12% ethylenediamine by volume, and the solid-liquid ratio is 1g: 10~20mL, soaked for 15 hours, separated from solid and liquid, washed with deionized water until neutral, dried to obtain pretreated Houttuynia cordata powder;
[0022] (2) Preparation of porous Houttuynia cordata powder: In the reactor, add deionized water: 34 mL, soluble starch: 3 g, egg white: 33 g, heat and stir to dissolve, pretreatment Houttuynia cordata powder: 30 g, ultrasonically disperse For 40 minutes, freeze at -18°C, then transfer to a freeze dryer to dry for 24 hours, and grind to obtain porou...
Embodiment 2
[0026] (1) Pretreatment of Houttuynia cordata powder: In the reactor, add deionized water: 104mL, concentrated sulfuric acid: 30mL, stir well, cool to room temperature, potassium permanganate: 8g, dissolve, then add Houttuynia cordata Powder: 32g, soak at room temperature for 8 hours, boil for 35 minutes, wash with deionized water until neutral, separate the solid from the liquid, put the solid into a 12% ethylenediamine solution by volume, and the solid-to-liquid ratio is 1g: 10-20mL, soaked for 15 hours, separated from solid and liquid, washed with deionized water until neutral, dried to obtain pretreated Houttuynia cordata powder;
[0027] (2) Preparation of porous Houttuynia cordata powder: In the reactor, add deionized water: 64 mL, soluble starch: 8 g, egg white: 70 g, heat and stir to dissolve, pretreatment Houttuynia cordata powder: 58 g, ultrasonically disperse For 40 minutes, freeze at -18°C, then transfer to a freeze dryer to dry for 24 hours, and grind to obtain po...
Embodiment 3
[0031] (1) Pretreatment of Houttuynia cordata powder: In the reactor, add deionized water: 58mL, concentrated sulfuric acid: 13 mL, stir well, cool to room temperature, potassium permanganate: 6g, dissolve, then add fishy smell Grass powder: 12g, soak at room temperature for 8 hours, boil for 35 minutes, wash with deionized water until neutral, separate the solid from the liquid, put the solid into a 12% ethylenediamine solution by volume, and the solid-to-liquid ratio is 1g : 10 ~ 20mL, soaked for 15 h, solid-liquid separation, then washed to neutral with deionized water, dried to obtain pretreated Houttuynia cordata powder;
[0032] (2) Preparation of porous Houttuynia cordata powder: In the reactor, add deionized water: 36 mL, soluble starch: 2 g, egg white: 30 g, heat and stir to dissolve, pretreatment Houttuynia cordata powder: 32 g, ultrasonically disperse For 40 minutes, freeze at -18°C, then transfer to a freeze dryer to dry for 24 hours, and grind to obtain porous Hou...
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