Synthesis of Ni-Co Metal–Organic Framework (Ni-Co MOF) Structures by High-Power, Continuous Laser-Induced Rapid Synthesis Method and Investigation of Their Morphological, Structural, Photophysical, and Electrical Properties

Mutlu S., Ortaç B., Karatutlu A., Yılmaz V., Aydın Yüksel S., Yılmaz A. H., ...Daha Fazla

POLYMERS, cilt.18, sa.1, ss.1-42, 2026 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 18 Sayı: 1
  • Basım Tarihi: 2026
  • Doi Numarası: 10.3390/polym18161985
  • Dergi Adı: POLYMERS
  • Derginin Tarandığı İndeksler: Academic Search Ultimate (EBSCO), Engineering Source (EBSCO), Scopus, Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest), Science Citation Index Expanded (SCI-EXPANDED), Chemical Abstracts Core, Compendex, INSPEC
  • Sayfa Sayıları: ss.1-42
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

Metal–organic bimetallic frameworks of Ni–Co, having metal content of 2:1 and 1:2 molar

ratios, respectively, have been synthesized via a rapid laser method with a continuouswave

Nd:YVO4 laser (λ = 975 nm) under 88–90 ◦C in a DMF/H2O solution in 70 min.

The structure, porosity, and photophysical, electrochemical, and dielectric characteristics

of the frameworks and their reduced graphene oxide (rGO) composites in the form of

powders and UV-cured PEGMEA/PEGDA films have been investigated. Framework

Ni2Co1MOF demonstrated a BET surface area equal to 88.3 m2 g−1 and a total pore

volume of 0.022 cm3 g−1, whereas framework Ni1Co2MOF exhibited a BET surface area of

52.5 m2 g−1 and a total pore volume of 0.016 cm3 g−1. The incorporation of rGO from 1 to

10 wt.% into the framework changed the charge transport and polarization properties of the

materials. The electrochemical investigations of the 10 wt.% rGO-Ni1Co2MOF composite in

0.5 M HCl demonstrated a specific capacitance of 32.3 F g−1 at 10 mV s−1, and it preserved

98% of the electrochemical response after 400 cycles, in comparison with 96% for the 10 wt.%

rGO-Ni2Co1MOF. The electrochemical responses consisted of both diffusion-controlled ion

transport and pseudocapacitance. The introduction of rGO in 1 to 10 wt.% in the polymer

composite improved the conductivity and Maxwell–Wagner–Sillars interface polarization at

low frequencies in the case of low rGO concentrations, whereas overly high rGO content led

to aggregation and the decreased influence of the conductive phase. The main contribution

of the present work is the fast sub-100 ◦C synthesis approach for compositionally tunable

Ni-Co frameworks/rGO materials and the relationships between the metal ratio, porous

structure, interfacial charge transport, and dielectric response.