Photoelectrochemistry detection device with double detection pools and use method of photoelectrochemistry detection device

Abstract

The invention relates to a photoelectrochemistry detection device with double detection pools and a use method of the photoelectrochemistry detection device. The device comprises a sample pool, a reference pool, a light source, a dark box and a voltage measurement recording device, wherein one side surface of the dark box is provided with a light valve assembly; the sample pool and the reference pool are arranged in the dark box; the light source is arranged at one side of the light valve assembly; a first light-sensitive electrode, a first pair of electrodes and a solution to be tested are arranged in the sample pool; a second light-sensitive electrode, a second pair of electrodes and a blank solution are arranged in the reference pool; the voltage measuring recording device respectively measures and records the voltage between the first light-sensitive electrode and the first pair of electrodes and the voltage between the second light-sensitive electrode and the second pair of electrodes. By using the double-passage detection pools, on the basis of not changing the existing operation conditions, the detection signal fluctuation due to factors such as light source instability and temperature change in the detection pools in the detection process can be counteracted through reference. The signal-to-noise ratio of the detection system is improved; the trace ingredient determining sensitivity of an electrochemiluminescence method is improved.

Description

technical field [0001] The invention relates to the field of photoelectrochemistry, in particular to a photoelectrochemical detection device with double detection cells and a method for using the same. Background technique [0002] Photoelectrochemistry (PEC) is the product of the combination of electrochemistry and photochemistry. It refers to the effective separation of the valence band electrons and electron holes of the semiconductor material on the photoelectrode under the condition of light, so that the electrons jump to the conduction band, and the electrons on the photoelectrode conduction band pass through the detection system to generate current. PEC undergoes two processes: photoexcitation process and electron transfer process. Compared with the electrochemiluminescence analysis method, PEC is light-activated and does not require an external voltage. The detection method is simple, practical and highly sensitive. [0003] On the other hand, the performance of ph...

AI Technical Summary

Problems solved by technology

[0005] The photoelectrochemical detector is an important measuring instrument in the photoelectrochemical sensor. The currently known photoelectrochemical detector is a single detection cell. When the light intensity of the light source of the photochemical detector is unstable, large measurement errors will occur.

At the same time, a single detection cell will also produce errors due to temperature changes in the detection cell

Based on the above reasons, the further improvement of the detection sensitivity of photoelectrochemical sensors is largely limited, which is not conducive to the determination of trace components.

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