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Integrating sphere type light-catalyzed reaction measuring system

A photocatalytic reaction and measurement system technology, which is applied in the field of integrating sphere photocatalytic reaction measurement system, can solve the problem that there is no integrating sphere photocatalytic reaction measurement system, and the relationship between absolute quantum yield, incident light intensity and catalyst dosage cannot be measured. Research and other issues, to achieve the effect of convenient related testing and research, accurate and reliable measurement, simple and efficient measurement

Active Publication Date: 2010-03-10
XI AN JIAOTONG UNIV
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Problems solved by technology

[0008] At present, in the photocatalytic reaction process, especially the solid-liquid photocatalytic system, the absolute quantum yield of the reaction cannot be measured, and there are few studies on the incident light intensity, catalyst dosage and the relationship between the two; Patents and literature show that there is no integrating sphere photocatalytic reaction measurement system, and there are no reports of similar devices at home and abroad.

Method used

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  • Integrating sphere type light-catalyzed reaction measuring system
  • Integrating sphere type light-catalyzed reaction measuring system
  • Integrating sphere type light-catalyzed reaction measuring system

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specific Embodiment

[0035] Integrating sphere photocatalytic reaction measurement system of the present invention, according to image 3 The operation shown in the flow chart (the monochromator is not used for now).

[0036] Example: Investigation of Catalyst Absorption Characteristics

[0037] Such as Figure 4 As shown, the incidence, scattering and transmission of light source (None), empty reaction vessel (Reaction vessel), deionized water (Deionized water), reaction solution (0g Cat / ml), and different catalyst dosage (0.0001-0.0034) were measured respectively Combined results.

[0038] (1) None: It is close to the solar spectrum in the ultraviolet and visible light regions, and the near-infrared light region is quite different, while the band used by the photocatalytic reaction is mainly the former, which can be regarded as a primary analog light source;

[0039] (2) Reaction vessel: basically coincides with None, it can be seen that the influence of the reaction vessel is very weak and c...

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Abstract

The invention discloses an integrating sphere type light-catalyzed reaction measuring system which is originally designed aiming at the problem that the most basic evaluation parameters respectively represent apparent quantum yield in the light-catalyzed reaction process and can theoretically research and solve the actual efficiency evaluation in the light-catalyzed process. According to functions, the system mainly comprises a light system part and a hydrogen system part which are organically coupled, wherein in the light system part, a light inputting and measuring system comprises a light source, a light path, a monochromator and an integrating sphere and a spectrometer; in the hydrogen system part, a light-catalyzed reaction and measuring system comprises a reaction vessel, a liquid storage vessel, a peristaltic pump, a gas differential detector and the like. The system realizes the synchronous measurement of reactive light absorbing property and the performance for producing hydrogen by light catalysis and can deeply research the light-catalyzed reaction process.

Description

technical field [0001] The invention belongs to a catalytic chemical reaction test experimental system, is a basic measurement system of a photocatalytic reaction, and particularly relates to an integrating sphere type photocatalytic reaction measurement system. Background technique [0002] In the semiconductor photocatalytic water splitting reaction, the basic principle of action is: when the semiconductor photocatalyst is irradiated by sunlight (mainly visible light and ultraviolet light), the electrons inside it are excited to transition from the valence band to the conduction band, thereby The conduction and valence bands generate free electrons and electron holes, respectively. When the electrons and holes migrate to the semiconductor surface, they will interact with the adsorbed substances. For aqueous solutions, the water can react to produce hydrogen or oxygen or both. The evaluation of photocatalytic reactions, especially the evaluation of photocatalysts, is extre...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01N30/02G01N21/17G01N21/33
Inventor 郭烈锦刘欢
Owner XI AN JIAOTONG UNIV
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