Method for preparing composite photocatalyst containing metal simple substance particles from carbon-containing solid waste

A solid waste and simple metal technology, applied in the field of resource utilization of solid waste, can solve problems such as unrecyclable reuse, improper ash disposal, toxic pollution, etc., and achieve the effects of easy operation and implementation, uniform heating, and simple preparation methods

Active Publication Date: 2020-05-01
JIANGSU UNIV OF TECH
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Problems solved by technology

[0004] Although the above methods have opened up a new way to recycle better carbon-containing solid waste, there are still some problems. Due to the presence of heavy metal substances in carbon-containing solid waste, it will cause certain damage to the experimental samples. Toxic pollution; in addition, improper treatment of ashes generated by the utilization of carbon-containing solid waste by pyrolysis will also cause secondary pollution, which cannot be recycled and reused

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  • Method for preparing composite photocatalyst containing metal simple substance particles from carbon-containing solid waste
  • Method for preparing composite photocatalyst containing metal simple substance particles from carbon-containing solid waste

Examples

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Effect test

Embodiment 1

[0026] Preparation of composite photocatalysts containing Au elemental nanoparticles based on municipal domestic sludge

[0027] The carbon-containing sludge was obtained from the urban sewage treatment plant, and the carbon content of the wet sludge was determined to be 2%. Take 5 g of wet sludge and 0.5 g of AuCl 3 ·HCl·4H 2 O was added to a beaker filled with distilled water at a solid-to-liquid ratio of 1:10, and the pH of the distilled water was adjusted to 1 in advance. The mixed solution was heated and stirred in a water bath at 90°C for 6 h, and then centrifuged to obtain a solid precipitate; after washing with ethanol-water mixed solution three times, the precipitate was dried and ground into powder, and the ground powder particles were put into a crucible, Under the protection of argon, it was calcined at 500° C. for 100 min in a tube furnace to obtain a composite photocatalyst containing Au elemental particles based on sludge activated carbon. The BET of the obta...

Embodiment 2

[0029] Preparation of Ag-containing nanoparticle composite photocatalyst based on wood chips

[0030] Saw chips were obtained from the wood processing plant, and the carbon content of the saw chips was determined to be 98%. Take 2 g wood chips and 0.2 g AgNO 3 According to the solid-to-liquid ratio of 1:20, it was added into a beaker filled with distilled water, and the pH value of the distilled water was adjusted to 2 in advance. The mixed solution was heated and stirred in a water bath at 90°C for 1 h, and then centrifuged to obtain a solid precipitate; washed with an ethanol-water mixed solution for three times, the precipitate was dried, and the dried precipitate was put into a crucible, under the protection of argon. Calcined at 1000 °C for 10 min in a tube furnace to obtain a composite photocatalyst based on wood chips containing Ag elemental particles. The BET of the obtained sawdust-Ag elemental particle composite photocatalyst reaches 1800 m 2 / g, and the degradati...

Embodiment 3

[0032] Preparation of Composite Photocatalysts Containing Cr Elemental Nanoparticles Based on Waste Resin

[0033] The waste resin is obtained from the resin production plant, and the carbon content of the waste resin is determined to be 60%. Take 3 g waste resin and 15 g Cr(NO 3 ) 3 9H 2 O was added into a beaker filled with distilled water at a solid-to-liquid ratio of 1:30, and the pH of the distilled water was adjusted to 3 in advance. The mixed solution was stirred at room temperature 20°C for 24 h, and then centrifuged to obtain a solid precipitate; washed with ethanol-water mixed solution for three times, the precipitate was dried, and the dried precipitate was put into a crucible, and used under the protection of argon The tube furnace was calcined at 200°C for 1440min to obtain a composite photocatalyst based on waste resin containing Cr elemental particles. The BET of the obtained waste resin-Cr simple particle composite photocatalyst reaches 2000 m 2 / g, and th...

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Abstract

The invention discloses a method for preparing a composite photocatalyst containing metal elementary substance particles from carbon-containing solid waste. The method specifically comprises the following steps: adding solid waste with a carbon content of 2-98% and a metal precursor solid raw material into an aqueous solution with a pH value of 1-6 according to the total solid-to-liquid ratio of 1:(10-30), and uniformly mixing; continuously stirring for 1-24 hours at a temperature of 20-90 DEG C, filtering, drying, and preparing into powder particles; and under the condition of introducing protective gas, carrying out a high-temperature reaction for 10-1440 minutes to obtain the composite photocatalyst containing the metal elementary substance particles. The method is simple in preparationprocess and easy to implement and operate, the specific properties of the carbon-containing solid waste are fully utilized, and the prepared composite photocatalyst has a remarkable effect when applied to organic wastewater treatment.

Description

technical field [0001] The invention relates to the field of resource utilization of solid waste, in particular to a method for preparing metal-containing elemental particle composite photocatalysts from carbon-containing solid waste. Background technique [0002] Carbon-containing solid waste mainly comes from carbon-containing sludge from sewage treatment plants, organic waste generated in industrial production, and domestic garbage. Carbon-containing solid waste will undergo physical changes under certain conditions, and spread and pollute the environment through the biosphere and natural forces, thereby endangering the health of animals and plants. At present, common methods for treating carbon-containing solid waste include composting and fermentation, landfill and sea reclamation, secondary resource recycling, and incineration for power generation. However, the existing treatment methods usually have problems such as secondary pollution, high energy consumption, or lo...

Claims

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Application Information

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IPC IPC(8): B01J23/52B01J35/10B01J23/50B01J23/26B01J23/755B01J23/42B01J23/75B01J37/08A62D3/30C02F1/30C02F101/30
CPCB01J23/52B01J23/50B01J23/26B01J23/755B01J23/42B01J23/75B01J37/084A62D3/30C02F1/30C02F2305/10C02F2101/30B01J35/39B01J35/653B01J35/657Y02W10/37
Inventor 黄寿强王梦杰吕扬杨凤岭刘硕潘君丽
Owner JIANGSU UNIV OF TECH
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