CoPc/rGO and CuPc/rGO Nanocomposites: Comparative Characterization and Study of Their Gas Sensing Properties

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Yağcı Ç., Emmanuel Aina O., Emamı A., Ibijbijen A., Dragoe D., Ben Aziza H., ...Daha Fazla

INORGANIC CHEMISTRY, cilt.0, 2025 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 0
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1021/acs.inorgchem.5c01085
  • Dergi Adı: INORGANIC CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aquatic Science & Fisheries Abstracts (ASFA), Art Source, Chemical Abstracts Core, Chimica, Compendex, EMBASE, DIALNET, Nature Index
  • Acıbadem Mehmet Ali Aydınlar Üniversitesi Adresli: Evet

Özet

ABSTRACT: Nanocomposites made of tetrahexyloxy-substituted

Co or Cu phthalocyanines adsorbed onto reduced graphene oxide

(rGO) have been prepared for detection of volatile organic

compounds (VOCs). Such nanocomposites could be formed in

organic solvents, thanks to the high solubility of the substituted

phthalocyanines, establishing van der Waals and π−π stacking

interactions with rGO. UV−visible, FT-IR, and XPS characterizations

evidenced the energy transfer between rGO and the

phthalocyanines; this adsorption ability is highly suitable to form

nanocomposites exhibiting improved electronic properties. The gas

sensing properties of various VOCs were explored by conductometric

measurements conducted on interdigitated electrodes

modified with the nanocomposites, highlighting the effect of the alkyloxy substituents and phthalocyanine’s metal. All exhibited

high affinity to ammonia gas compared with other VOCs. The CuPc/rGO nanocomposites showed higher sensitivity with a lower

limit of detection (0.4 ppm) compared to CoPc/rGO (1 ppm), while phthalocyanines alone give lower sensitivity, where the limit of

detection of CuPc(OHex)4 is 5.7 ppm and CoPc(OHex)4 shows a nonlinear fit. We explained this behavior by improved energy

transfer between rGO and CuPc(OHex)4, favoring the coordination of ammonia. Detection of ammonia gas in real samples has

been achieved to further demonstrate the efficiency of these sensors.