期刊
APPLIED SURFACE SCIENCE
卷 540, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.148398
关键词
Red phosphorus; Continuous flow; Photocatalytic disinfection; Optofluidic reactor; Solar water disinfection (SODIS); Photocatalyst immobilization
类别
资金
- DST-SERB under the ECR scheme [ECR/2017/000222]
- DST-SERB
A non-metallic red phosphorus-based photocatalyst for potential continuous flow water disinfection was reported. The immobilized photocatalyst in the reactor demonstrated a 6.7 log reduction in E. coli concentration under direct sunlight within 14 minutes, showing high efficiency of the process and suggesting great potential for commercial scale-up.
An elemental, non-metallic red phosphorus-based photocatalyst for potential continuous flow disinfection of water is reported. The crystalline red phosphorus is immobilized by a solid state method on the inner walls of a quartz capillary tube and a continuous flow photocatalytic disinfection of E. coli solution under direct sunlight is demonstrated using the set-up as an optofluidic reactor. Structural and microstructural analyses employing electron diffraction confirms the fibrous phase of the immobilized red phosphorus. The reactor with the immobilized photocatalyst when tested under direct sunlight resulted in a 6.7 log reduction (>99.9999% reduction) in the concentration of E. coli bacteria within 14 min. The sample aliquot collected at 28 min residence time did not yield any visible colonies indicating the high efficiency of the process. The demonstrated efficiency suggests great potential for commercial scale-up.
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