Fabricaiton Of Novel Materials For Rapid In-situ Detection Of Polluted Water Samples

We have made great achievements in social and economic development for years, but also, we have suffered from environmental pollution, which seriously hamper economic growth. Water pollution is the top environmental concern among environmental issues. Thus, it is very important to develop new functional materials and establish rapid in-situ detection methods for pollutants detection. This paper studies three new materials for rapid in-situ detection of pollutants such as cyanide, pyrocatechol, aniline with visual colorimetric, surface-enhanced Raman scattering and microfluidic techniques. The main contents are listed as follows:1. Research and preparation of the cyanide test kitA powdered reagent for cyanide detection was prepared with common chemical reagents, and was the reagent for cyanide detection was demonstrated with wide concentration range, accurate detection results, strong anti-interference performance, easy preparation and low cost, which could be used effectively for rapid in-situ determination of cyanide as an excellent analytical tool.2. Screen print high SERS-active Au-Ag bimetallic SERS substrateA high-performance Au-Ag bimetallic SERS substrate was fabricated using screen printing technology. The prepared Au-Ag bimetallic SERS substrate exhibited high reproducibility and high Raman enhancement factors of7.3×106. Furthermore, this substrate was demonstrated with good reproducibility and stability, retaining excellent uniformity and sensitivity after storage for months. This substrate has potential to significantly facilitate practical SERS substrate preparation.3. Fabricate paper-based microfluidic SERS chip for detection of polluted water samplesA novel paper-based microfluidic SERS chip integrating filtering was successfully fabricated by screen printing process. The chip applied to achieve efficient detection for organic pollutants of real water samples. The chip holds great potential to find wide application especially in remote regions and in-situ rapid detection.