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A kind of z-type heterojunction ag-pani embedded imprinted cds/fe3o4/c and its preparation method

A heterojunction, fe3o4 technology, applied in chemical instruments and methods, water/sludge/sewage treatment, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as unfavorable photocatalyst synthesis, and achieve good results. Magnetic separation characteristics, avoiding the effect of low photocatalytic activity and high photocatalytic activity

Inactive Publication Date: 2018-12-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Fe 3 o 4 Agglomeration often occurs, which is not conducive to the synthesis of photocatalysts. Therefore, we use corn cobs to prepare activated carbon and use them as a carrier. Corn cobs, as one of the types of solid waste, have caused certain threats to the environment and human health. Activated carbon prepared from corncobs can effectively inhibit Fe 3 o 4 agglomeration and provide more binding sites for CdS loading

Method used

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  • A kind of z-type heterojunction ag-pani embedded imprinted cds/fe3o4/c and its preparation method
  • A kind of z-type heterojunction ag-pani embedded imprinted cds/fe3o4/c and its preparation method
  • A kind of z-type heterojunction ag-pani embedded imprinted cds/fe3o4/c and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0051] (1) Preparation of activated carbon (C): put 10 g of corncobs into a tube furnace, program temperature rise from room temperature (heating rate: 4°C / min) to 400°C under nitrogen atmosphere, and then calcine at 400°C for 1 hour at a constant temperature. Then cool to room temperature, soak in 2mL 0.1g / mL potassium hydroxide solution for 24h, rinse until neutral and dry in an oven at 50°C for 12h, then move to a tube furnace at 4°C under nitrogen protection Heating at a heating rate of 1 / min to 850°C for 1 hour, after cooling with the furnace, the product was dried in an oven at 50°C for 12 hours to obtain activated carbon (C).

[0052] (2) Fe 3 o 4 Preparation of / C: Dissolve 0.3g of the above-mentioned activated carbon (C) in 25mL of ethylene glycol, sonicate for 20min, then add 0.62g of ferric nitrate nonahydrate, sonicate for 20min, then add 0.75g of sodium acetate, 0.2g of polyethylene glycol 1500 and 0.005 g polyvinylpyrrolidone, sonicated for 20 minutes, then put...

Embodiment 2

[0062] The same steps of the preparation process of Example 1 are carried out, except that the addition of Ag-PANI in step (6) is respectively 0.05 g, 0.1 g, 0.15 g, 0.2 g, 0.25 g, 0.3 g, to prepare different Ag-PANI PANI embedded imprinted CdS / Fe 3 o 4 / C, to investigate the effect of different Ag-PANI additions on Ag-PANI intercalated imprinted CdS / Fe 3 o 4 Influence of / C photocatalytic activity, investigate the activity of photodegradation 2-mercapto-1-methylimidazole solution according to (8) step in embodiment 1. Photocatalytic effects such as Figure 6 As shown, it can be seen that the Ag-PANI intercalated imprinted CdS / Fe prepared when the amount of Ag-PANI added is 0.15g 3 o 4 / C photodegradation of 2-mercapto-1-methylimidazole has the best effect.

Embodiment 3

[0064] Carry out the same steps as the preparation process of Example 1, except that in step (6), the simulated sunlight-induced polymerization time is 1min, 5min, 10min, 15min, and 20min respectively to prepare different Ag-PANI embedded imprinted CdS / Fe 3 o 4 / C, to investigate the effect of different simulated sunlight-induced polymerization time on Ag-PANI intercalated imprinted CdS / Fe 3 o 4 Influence of / C photocatalytic activity, investigate the activity of photodegradation 2-mercapto-1-methylimidazole solution by (8) step in embodiment 1. Photocatalytic effects such as Figure 7 As shown, it can be seen that the Ag-PANI intercalated imprinted CdS / Fe prepared when the simulated sunlight-induced polymerization time is 10min 3 o 4 / C photodegradation of 2-mercapto-1-methylimidazole has the best effect.

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Abstract

The invention provides a Z-type heterojunction-like Ag-PANI embedded imprinted CdS / Fe3O4 / C and a preparation method thereof, which are carried out according to the following steps: step 1, preparation of activated carbon; step 2, preparation of Fe3O4 / C; Step 3. Preparation of CdS / Fe3O4 / C; Step 4. Preparation of polyaniline; Step 5. Preparation of Ag‑PANI; Step 6. Preparation of Ag‑PANI embedded imprinted CdS / Fe3O4 / C. The present invention embeds Ag-PANI as a functional monomer into the imprinted layer, which can make PANI and CdS form a quasi-heterojunction structure, and the introduction of Ag can further form a quasi-Z-type heterojunction structure, which greatly improves the It improves the photocatalytic activity, avoids the problem of low photocatalytic activity of ordinary imprinted photocatalytic materials, and achieves a dual improvement of photocatalytic activity and selectivity.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, in particular to a Z-type heterojunction-like Ag-PANI embedded imprinted CdS / Fe 3 o 4 / C and its preparation method. Background technique [0002] As an organic compound frequently used in industrial undertakings, mercaptan-based harmful organic compounds have also caused great harm to human safety. How to safely remove mercaptan-based harmful organic compounds has become one of the current research hotspots. As a new type of environmentally friendly treatment technology, photocatalytic technology has attracted the attention of many researchers. CdS, which has a narrow band gap, can be excited under visible light conditions to generate photogenerated electrons and photoinduced holes, and has good visible light response characteristics, and has become a photocatalytic material that researchers have paid extensive attention to. However, ordinary CdS cannot selectively ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C02F1/30C02F101/38
CPCC02F1/30B01J31/28C02F2101/40C02F2101/38C02F2305/10B01J35/33B01J35/39
Inventor 逯子扬朱晓蝶高乃玲宋旼珊赵晓旭朱志王友山闫永胜
Owner JIANGSU UNIV