Method for producing hydrogen by using dye-sensitized photocatalytic fuel cell and degrading organic dye wastewater simultaneously
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An organic dye and dye sensitization technology, which is applied in the field of simultaneous hydrogen production to achieve the effects of improving degradation efficiency, solving environmental pollution and energy shortage, and being convenient to use.
Inactive Publication Date: 2012-10-03
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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[0004] For the research on PFC hydrogen production and dye sensitization, many researchers have focused on photoanode materials, improving the utilization efficiency of sunlight, optimizing the process para...
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[0045] (1) Preparation of PFC electrode
[0046] The photoanode can be prepared by preparing a photocatalyst nano-film on the carrier; the cathode is mainly prepared by loading the Pt / C catalyst on the conductive porous material; the proton exchange membrane needs to be pretreated to selectively permeate protons.
[0047] The photoanode carrier can be made of sheet or mesh conductive materials, such as titanium plate, conductive nickel mesh, carbon fiber cloth or carbon paper, FTO, ITO glass and other materials.
[0048] Photoanode catalysts are characterized by porous semiconductor materials (such as TiO 2 , ZnO, WO 3 , SnO 2 Wait).
[0049] The above-mentioned photocatalyst is prepared on a solid carrier, including the selection of immobilization techniques such as sol-gel method, liquid phase deposition method, vapor phase deposition method, magnetron sputtering method, etc., and the optimization of heat treatment temperature to achieve a firm combination of the catalyst...
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[0058] (1) Preparation of PFC photoanode:
[0059] 10ml concentrated H 2 SO 4 Add dropwise into 50ml of deionized water, stir with a magnetic stirrer for 5 minutes, add 1mL of tetrabutyl titanate dropwise, and stir for 5 minutes. Put the prepared solution into a 100ml high-pressure reaction kettle with a polytetrafluoroethylene liner, and place the cleaned FTO glass substrate in the reaction kettle with the conductive film facing down. Then the reaction kettle was put into a drying oven and heated to 150°C for reaction, and the temperature was kept for 16 hours. After the reaction, cool down to room temperature naturally, take out the FTO glass, rinse it repeatedly with deionized water, then dry it naturally in the air, put it into a muffle furnace for heat treatment at 450 °C for 1 h, and obtain TiO 2 Nanocrystalline array films.
[0060] The above TiO 2 The nanocrystalline array film was placed in a medium-high pressure reactor containing 60ml of NaOH solution with a co...
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Abstract
The invention discloses a method for producing hydrogen by using a dye-sensitized photocatalytic fuel cell (PFC) and degrading organic dye wastewater simultaneously. The method comprises the following steps of: introducing the organic dye wastewater into a PFC optical anode chamber, exciting organic dyes under the action of the irradiation of visible light and electro-catalysis, mineralizing organic matters of the optical anode chamber, and degrading the organic matters to form harmless substances such as CO2 and H2O. According to the method, electrons generated in the degradation process are enriched on the surface of an optical anode and are driven to a cathode electrode by an external circuit; and H<+> generated by the optical anode enters a cathode solution through a proton conductor and receives the electrons from a cathode to generate the hydrogen, so that the hydrogen is produced while the organic dye wastewater is degraded. According to the method, a PFC hydrogen production technology and a technology of degrading the organic dye wastewater are combined, and a dye-sensitized optical anode structure is adopted, so that the organic dye wastewater is degraded and the hydrogen is produced under visible light, and the feasible basis is provided for the actual application of completing solar decontamination and solar hydrogen production synchronously by the PFC in future.
Description
technical field [0001] The invention relates to the environmental technical field of solar photocatalytic hydrogen production and organic dye wastewater treatment, in particular to a method for degrading organic dye wastewater and simultaneously producing hydrogen by using a dye-sensitized photocatalytic fuel cell (Photocatalytic Fuel Cell, PFC). technical background [0002] As we all know, energy and the environment are the key issues facing the development of society today. While the use of traditional fossil fuel energy has brought civilization and prosperity to mankind, the resulting pollution of dye wastewater has also brought harm to human survival and the environment. A huge disaster, and fossil fuels are also facing depletion. Energy stability and security are important guarantees for economic rise. Therefore, finding a durable and effective clean energy to achieve sustainable development of energy and the environment is a strategic need for social development. As ...
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