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Capillary tube array photo catalysis reactor and its preparation and application

A photocatalytic reactor and capillary array technology, which is applied in the chemical/physical/physical chemical process of applying energy, etc., can solve the problems of low sensitivity of potassium dichromate, poor measurement accuracy, and large amount of reflux time, etc., and reaches the detection limit. Low, shortened time, wide linear range effect

Inactive Publication Date: 2008-07-23
EAST CHINA NORMAL UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This method has the advantages of accurate measurement results and good reproducibility, but it consumes a large amount of concentrated sulfuric acid and expensive silver sulfate. In order to eliminate the interference of chloride ions, it is necessary to add highly toxic mercury sulfate for masking, and the sample needs to be digested. a lot of reflow time
In addition, when measuring low-pollution water samples such as surface water, drinking water, etc., the sensitivity of the potassium dichromate method is low
Therefore, when detecting low-pollution water samples, the potassium permanganate index method is recommended in my country, but this method has disadvantages such as weak oxidation ability and poor measurement accuracy.

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  • Capillary tube array photo catalysis reactor and its preparation and application
  • Capillary tube array photo catalysis reactor and its preparation and application

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Embodiment 1

[0055] The preparation of embodiment 1 capillary array photocatalytic reactor

[0056] The following only lists the technical data and indicators involved in each step:

[0057] In the first step, the inner diameter, outer diameter, number and length of the capillary 1 are 560 μm, 690 μm, 30 and 15 cm, respectively. In the second step, the inner diameter of the upper and lower polytetrafluoroethylene tubes 30, 31 is 1.5mm, and the outer diameter of the upper and lower polytetrafluoroethylene tubes 30, 31 is 11em. In the third step, the upper and lower circular trays 40, 41 are plexiglass discs with a back degree and a diameter of 3mm and 12cm respectively. In the fourth step, the distance between the upper polytetrafluoroethylene tube 30 and the lower polytetrafluoroethylene tube is 15 em. In the sixth step, the number of capillary tubes 1 in the capillary tube array is 30. In the seventh step, the power of the ultraviolet lamp 2 and the center wavelength of the emission sp...

Embodiment 2

[0058] Example 2 One of the methods for detecting the chemical oxygen demand of the water sample to be tested with a capillary array photocatalytic reactor: the detection of the water sample with a high COD value

[0059] In the first step, the mobile liquid is 10mmol / L K with a pH of 0.5 2 Cr 2 o 7 solution. In the second step, the flow rate of the flowing liquid was 0.3mL / min, and glucose standard solutions of different concentrations were injected into the reactor through the injection valve. After the photocatalytic reaction was completed, Cr was measured at 610nm. 3+ The change value of absorbance photometry value, quantitative COD value in highly polluted water. Its working curve is y=0.009x+0.0699, where y and x correspond to Cr respectively 3+ The change value of the absorbance value and the measured COD value, the measuring range is 10.0~500mg / L. In the third step, the water sample to be tested is taken from a domestic sewage plant in Shanghai, and the Cr 3+ The...

Embodiment 3

[0060] Example 3 The second method of capillary array photocatalytic reactor to realize the detection of chemical oxygen demand in water: detection of samples with low COD value

[0061] In the first step, the mobile liquid is 3.0 μmol / L Ce(SO 4 ) 2 solution. In the second step, the flow rate of the flowing liquid is 0.5mL / min, and glucose standard solutions of different concentrations are injected into the reactor through the injection valve. After the photocatalytic reaction is completed, Ce is measured at 320nm. 4+ The change value of the absorbance photometry value can quantify the COD value in low-polluted water bodies. Its working curve is y=0.2384x+0.0293, where y and x respectively correspond to Ce 4+ The change value of the absorbance value and the measured COD value, the measurement range is 1.0~12mg / L. In the third step, the water sample to be tested is taken from domestic tap water in Shanghai, and the Ce 4+ The change value of the absorbance value was 0.578, ...

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Abstract

The capillary array photocatalytic reactor and its making process and application belong to the field of nanometer semiconductor material photocatalytic reactor technology. The capillary array photocatalytic reactor of the present invention has capillary array with nanometer TiO2 film attached to the inner walls for photocatalytic reaction. The capillary array photocatalytic reactor has the advantages of no pulverizing and loss of the photocatalyst, great contact area between the reacted liquid and the photocatalyst, high light source utilization rate, high photocatalytic efficiency, capacity of detecting micro amount of sample, etc. The present invention also provides method of utilizing the photocatalytic reactor in detecting COD value of water sample.

Description

technical field [0001] The invention relates to a capillary array photocatalytic reactor and its preparation and application, to be more precise, relates to a capillary array nano-TiO 2 A thin-film photocatalytic reactor and its preparation and application belong to the technical field of nano semiconductor material photocatalytic reactor and its preparation and application. Background technique [0002] The photocatalytic reactor is the place where the photocatalytic reaction takes place, and the design of an efficient and easy-to-use reactor plays a very important role in the scientific research and practical application of the photocatalytic reaction. Since the 1980s, heterogeneous photocatalysis of nano-semiconductor materials has gained more and more attention in the field of environmental protection. The photocatalytic reaction can carry out a deep reaction at room temperature, completely mineralize and remove a variety of organic pollutants, especially in the removal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/12
Inventor 金利通张中海方艳菊袁园张文鲜跃仲施国跃
Owner EAST CHINA NORMAL UNIV