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Abandoned shell/nanometer Cu2O composite photocatalyst material as well as preparation and application thereof

A composite photocatalysis and shell technology, applied in catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problem of difficult to avoid the use and discharge of toxic organic reagents, and achieve the effect of easy sedimentation and separation and high catalytic activity.

Inactive Publication Date: 2012-07-11
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, studies have used zeolite, montmorillonite, carbon nanotubes, glass fibers, floating beads, cation exchange resins, chitosan, etc. as carriers to achieve the immobilization of nano-cuprous oxide. It is difficult to avoid the use and discharge of toxic organic reagents

Method used

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  • Abandoned shell/nanometer Cu2O composite photocatalyst material as well as preparation and application thereof
  • Abandoned shell/nanometer Cu2O composite photocatalyst material as well as preparation and application thereof
  • Abandoned shell/nanometer Cu2O composite photocatalyst material as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The pearl shells after pickling (soaked in dilute hydrochloric acid with a mass concentration of 0.1% for 0.5 h) and dried were calcined and activated in a muffle furnace at 1050 ° C for 2 h and crushed through a 100-mesh sieve; the NaCl concentration in the 200 mL micro-reaction system was 2.0mol / L, the concentration of sodium dodecylbenzenesulfonate is 5.0g / L, 2.0g CuCl and 2.0g activated pearl shell powder are added under magnetic stirring. The mass ratio of sodium dodecylbenzenesulfonate, CuCl and activated shell powder is 1:2:2. After continuous stirring and hydrolysis for 30min, suction filtration, ultrasonic washing (oscillation of ultrasonic cleaner for 5min), and 5 times of water washing, the obtained brown-yellow solid was dehydrated and dried at 60°C for 6h to obtain nano-Cu 2 O / shell composite photocatalytic material. Supported nano-Cu 2 The O particles are spherical and the particle size is less than 100 nm. figure 1 and figure 2 The scanning electron ...

Embodiment 2

[0025] After pickling (soaked in dilute hydrochloric acid with a mass concentration of 0.05% for 1 h) and dried, the clam shells were calcined and activated in a muffle furnace at 900 ° C for 2 h and crushed through a 100-mesh sieve; the NaCl concentration in the 100 mL micro-reaction system was 4.0 mol / L, the concentration of sodium dodecylbenzenesulfonate was 5.0g / L, 1.0g CuCl and 1.0g activated clam shell powder were added under magnetic stirring. The mass ratio of sodium dodecylbenzenesulfonate, CuCl and activated shell powder is 1:2:2. After continuous stirring and hydrolysis for 10 min, suction filtration, ultrasonic washing (oscillation with an ultrasonic cleaner for 3 min), and 5 water washings were performed, and the obtained brown-yellow solid product was dehydrated and dried at 60° C. for 6 h.

[0026] In the photocatalytic experiment, a large test tube with a diameter of 38mm was used as the reactor, and a 500w iodine-tungsten lamp was used as the light source. Aft...

Embodiment 3

[0028] The oyster shells after pickling (soaked in dilute hydrochloric acid with a mass concentration of 0.1% for 0.5h) and dried were calcined and activated in a muffle furnace at 1050°C for 2h and pulverized through a 100-mesh sieve. The NaCl concentration in the 100mL micro-reaction system was 2.0mol / L, the concentration of sodium dodecylbenzenesulfonate is 5.0g / L, 1.0g CuCl and 1.0g activated oyster shell powder are added under magnetic stirring. The mass ratio of sodium dodecylbenzenesulfonate, CuCl and activated shell powder is 1:2:2. After continuous stirring and hydrolysis for 20 min, suction filtration, ultrasonic washing (oscillation with an ultrasonic cleaner for 2 min), and 4 water washings were performed, and the obtained brown-yellow solid product was dehydrated and dried at 60° C. for 6 h.

[0029] In the photocatalytic experiment, a test tube with a diameter of 18 mm was used as the reactor, and visible light was used as the light source. Table 1 shows that un...

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Abstract

The invention provides an abandoned shell / nanometer Cu2O composite photocatalyst material as well as a preparation method and application of the photocatalyst material. The preparation method mainly comprises the steps of activation of shells and in-situ hydrolysis and load of nanometer Cu2O and concretely comprises the steps of: activating the abandoned shells at a high temperature to enhance the alkalinity and porosity, adsorbing and in situ hydrolyzing univalent copper ions in solution by utilizing the developed porosity and alkalinity of the activated shells, drying, dehydrating, tightly loading nanoscale globular Cu2O particles on the surface of the shells and synthetizing the composite photocatalyst material. The invention relates to resource recovery and high-value utilization of wastes on raw materials, utilization of visible light and sunlight on energy and treatment of organic pollutants difficult to degrade by water body on application. The nanometer Cu2O / shell composite photocatalyst material has important significance in environmental protection and the activity of the composite photocatalyst material is greatly superior to that of the nanometer Cu2O.

Description

technical field [0001] The invention belongs to the functional nanomaterial synthesis technology in the field of solid waste resource utilization, in particular to shell-loaded nanometer Cu with photochemical catalytic performance 2 Preparation method and application of O composite material. Background technique [0002] A large number of discarded shells produced by the marine aquaculture and seafood processing industries are discarded and dumped at will, which is an improper disposal that wastes resources and pollutes the environment. Its resource utilization is the key to rational disposal of shells. Shells contain 95% calcium carbonate and a small amount of organic matter. At present, the resource utilization methods of shells mainly include the processing of shell crafts, the development of animal feed, and the development of biomedicine. The calcined shells have high porosity, uniform pore size distribution and large specific surface area at the micron scale, which m...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J32/00B01J37/00B09B3/00C02F1/30C02F103/30C02F101/32
CPCY02W10/37
Inventor 朱校斌邹晓兰于艳卿李超峰王新亭李红
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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