Your browser doesn't support javascript.
loading
Tailoring confined CdS quantum dots in polysulfone membrane for efficiently durable performance in solar-driven wastewater remediating systems.
Alsohaimi, Ibrahim Hotan; Alhumaimess, Mosaed S; Alzaid, Meshal; Essawy, Amr A; El-Aassar, M R; Mohamed, Rasha M K; Hassan, Hassan M A.
Afiliación
  • Alsohaimi IH; Chemistry Department, College of Science, Jouf University, Sakaka, P.O. Box 2014, Saudi Arabia. Electronic address: ehalshaimi@ju.edu.sa.
  • Alhumaimess MS; Chemistry Department, College of Science, Jouf University, Sakaka, P.O. Box 2014, Saudi Arabia.
  • Alzaid M; Physics Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia.
  • Essawy AA; Chemistry Department, College of Science, Jouf University, Sakaka, P.O. Box 2014, Saudi Arabia.
  • El-Aassar MR; Chemistry Department, College of Science, Jouf University, Sakaka, P.O. Box 2014, Saudi Arabia.
  • Mohamed RMK; Chemistry Department, College of Science, Jouf University, Sakaka, P.O. Box 2014, Saudi Arabia.
  • Hassan HMA; Chemistry Department, College of Science, Jouf University, Sakaka, P.O. Box 2014, Saudi Arabia.
J Environ Manage ; 332: 117351, 2023 Apr 15.
Article en En | MEDLINE | ID: mdl-36731407
In this work, CdS quantum dots (QDs) were successfully confined in polysulfone membrane (PSM) to develop a photoactive membrane under solar illumination that was suited in wastewater remediating system. The CdS@PSM membranes were prepared using the nonsolvent induced phase separation (NIPS) approach. Optical measurements show the confinement of CdS quantum dots (QDs) in the PS matrix within the narrowest band gap (2.41 eV) at 5 wt% loading. PS has two strong emission peaks at 411 and 432 nm due to photoelectron-hole recombination on pure PSM's surface. Adding 1 wt% CdS QDs to PSM reduced the earlier peak and blue-shifted the latter, within the appearance of three emission peaks attributed to the near band-edge emission of confined CdS QDs. Overloading CdS reduced all emission peaks. Moreover, fluorimetric monitoring of •OH radicals indicates that PSM produces the least amount of photogenerated •OH radicals while CdS@PSM(5 wt%) achieved the highest productivity. Examining the developed membranes in detoxifying methylene blue (MB) from aqueous solution of natural pH 8.1 showed weak adsorption in dark over 90 min of contact while switching to solar illumination significantly photodegrade MB where the degradation efficiency starts from 49% for pure PSM to 79% for CdS@PSM(5 wt%). Influence of pH was found crucial on photodegradation efficacy. Acidic pH 3 showed the weakest photodegradation efficacy, while the alkaline pH 12 was 18.88 times more effective. The used CdS@PSM (5 wt%) was successfully photo-renovated by soaking in 10 mL of NaOH solution under Solar illumination for 15 min to be used in 4 consecutive photodegradation cycles with insignificant decrease in efficacy. These findings are promising and could lead to a high-efficiency, sustainable photocatalytic suite.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Puntos Cuánticos Idioma: En Revista: J Environ Manage Año: 2023 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Puntos Cuánticos Idioma: En Revista: J Environ Manage Año: 2023 Tipo del documento: Article Pais de publicación: Reino Unido