Tuning CO2 sensitivity of HPTS by ZnO and ZnO@Ag nanoparticles

ZEYREK ONGUN M.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, cilt.400, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 400
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.jphotochem.2020.112664
  • Dergi Adı: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Agricultural & Environmental Science Database, BIOSIS, Chemical Abstracts Core, Chimica, INSPEC
  • Anahtar Kelimeler: 8-Hydroxypyrene-1,3,6-trisulfonic acid trisodium (HPTS), ZnO NPs, ZnO@Ag NPs, Optical CO2 sensing
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Carbon dioxide sensing ability of 8-hydroxypyrene-1,3,6-trisulfonic acid trisodium (HPTS) has been improved by using nano-scale zinc oxide (ZnO) and silver coated zinc oxide (ZnO@Ag) particles. Sol-gel synthesized particles were characterized by XRD, XPS, SEM, FTIR and UV-vis spectroscopy. When the ion pair form of the HPTS embedded in ethyl-cellulose thin film along with the additives, resulted in many advances such as high relative signal change (I-0/I-100 = 116) and larger response range, improved sensor dynamics and higher sensitivity with respect to the additive-free form. More specifically, in the presence of the ZnO and ZnO@Ag nanoparticles, 80.0 and 97.0 % variation in relative signal intensity was observed for the concentration range of 0-20 % [CO2], respectively. The observed enhancement in the CO2 induced sensitivity of the HPTS can be attributed to the absorption-emission abilities of the ZnO and silver-coated-ZnO nanoparticles as well as their hygroscopic characteristics.