Sensor for detecting residual chlorine in tap water and preparation method of sensor

Abstract

The invention discloses a sensor for detecting residual chlorine in tap water, which can be combined with an MEMS (Micro-electromechanical Systems) technology to realize batch production, so large-scale application can be realized. The key technology of the method comprises a preparation method of a silicon-based surface micro-nano structure, preparation of a boron-doped diamond electrode and an electrochemical method for measuring residual chlorine based on a two-electrode system constructed by combining a boron-doped diamond (BDD) electrode and a synchronously prepared metal platinum Pt counter electrode. The sensor has the characteristics that 1) high-sensitivity accurate detection; 2) a self-cleaning function; 3) miniaturization, batch preparation, low cost and easy integration. According to the invention, durability, high performance and miniaturization of the residual chlorine detection sensor are achieved through the design, the residual chlorine detection sensor can be combinedwith an acquisition circuit module and an infinite sending module to form an online residual chlorine detection probe, the residual chlorine detection probe can be integrated into a water meter and awater conveying pipeline, intelligent tap water management is achieved, and manpower is saved.

Description

technical field [0001] The invention relates to a sensor for residual chlorine detection in tap water and a preparation method thereof, belonging to the technical field of sensors. Background technique [0002] The safety of urban tap water supply is very important to the health of citizens. Injuries caused by pollution of water sources or secondary pollution during water pipeline transportation and water supply are common and worthy of attention. Chlorine disinfectant is a commonly used disinfectant for tap water. In addition to being used in the process of water purification, a certain amount of disinfectant must also be added during the transportation of tap water to limit the reproduction and growth of bacteria during the transportation of tap water. However, excessive residual chlorine content in tap water will cause harm to the human body. In order to promptly detect excessive residual chlorine content caused by water pipe quality problems or misoperation in the water ...

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Problems solved by technology

[0008] Inspired by this patent, the applicant of the present application developed a residual chlorine sensor based on double platinum ring electrodes, by preparing two similar platinum electrode rings on the surface of the front end of the Ag / AgCl reference electrode, as the electrochemical system respectively. working and counter electrodes, It is reduced on the platinum ring to realize the detection of residual chlorine, which overcomes the shortcomings of silver as the working electrode, but the sensor based on the double platinum ring electrode is relatively large, and after long-term continuous use, the electrode will be damaged due to dust, organic matter, and microorganisms. passivation

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