Engineering multiscale porosity and adsorption thermodynamics in pan–silica hybrid nanocomposites: linking sol–gel synthesis with surface energy heterogeneity

Akbarov, Khamdam, Yong-Ill Lee, Kattaev, Nuritdin, Mamatov, Jaykhun, Mirzakhidov1, Khayrulla, Kolyadin, Vladimir

Ўзбекистон Миллий университети хабарлари · 2026-yil

Annotatsiya

This study establishes the relationship between synthesis conditions, multiscale pore architecture, and adsorption thermodynamics in PAN–SiO₂ hybrid nanocomposites prepared via sol–gel routes. Based on adsorption isotherms of benzene, water, and nitrogen analyzed using BET, V–t, BJH, DFT, and the Theory of Volume Filling of Micropores (TVFM), a hierarchical micro–mesoporous structure was identified, with a specific surface area up to 236 m²/g and a total pore volume approaching 1.0 cm³/g, where micropores contribute up to ~95% of the total pore volume. An optimal composition (PAN–SiO₂ ≈ 1:3) was found to provide maximum pore development due to the formation of interpenetrating polymer–inorganic networks. Water adsorption reaches 3.79 mmol/g, significantly exceeding benzene adsorption (~0.99 mmol/g), indicating the dominance of specific interactions such as hydrogen bonding. Thermodynamic analysis reveals pronounced surface energy heterogeneity, with differential heats of adsorption up to 110 kJ/mol (water) and 98.5 kJ/mol (benzene), and strongly negative entropy values (down to −147 J/mol·K), reflecting restricted molecular mobility within the pore structure. The adsorption behavior follows a multistage mechanism involving micropore filling, cooperative interactions (for water), and capillary condensation. The results demonstrate that both pore structure and surface energetics can be effectively tuned through synthesis, highlighting the potential of PAN–SiO₂ hybrid nanocomposites for advanced adsorption and separation applications.

Maqola ma’lumotlari
MualliflarAkbarov, Khamdam, Yong-Ill Lee, Kattaev, Nuritdin, Mamatov, Jaykhun, Mirzakhidov1, Khayrulla, Kolyadin, Vladimir
JurnalЎзбекистон Миллий университети хабарлари
NashriyotЎзбекистон Миллий университети
ISSN2181-7324, 3093-8996
Nashr sanasi2026-04-28
Jild1
Son1
Betlar3-21
TilIngliz
Ilmiy sohaKimyo
DOI10.65449/journalofmodernchemistry.v1i1.12116
Indeksga qo‘shilgan2026-10-18

DOI: 10.65449/journalofmodernchemistry.v1i1.12116 · Maqolaning asl sahifasi

Kalit so‘zlar

PAN–SiO₂, sol–gel, hierarchical porosity, adsorption, TVFM, thermodynamics

Ilmiy soha

Kimyo

Iqtibos keltirish

APAAkbarov, Khamdam, Yong-Ill Lee, Kattaev, Nuritdin, Mamatov, Jaykhun, Mirzakhidov1, Khayrulla, & Kolyadin, Vladimir (2026). ENGINEERING MULTISCALE POROSITY AND ADSORPTION THERMODYNAMICS IN PAN–SILICA HYBRID NANOCOMPOSITES: LINKING SOL–GEL SYNTHESIS WITH SURFACE ENERGY HETEROGENEITY. Ўзбекистон Миллий университети хабарлари, 1(1), 3-21. https://doi.org/10.65449/journalofmodernchemistry.v1i1.12116
GOST (OAK)Akbarov, Khamdam va b. ENGINEERING MULTISCALE POROSITY AND ADSORPTION THERMODYNAMICS IN PAN–SILICA HYBRID NANOCOMPOSITES: LINKING SOL–GEL SYNTHESIS WITH SURFACE ENERGY HETEROGENEITY // Ўзбекистон Миллий университети хабарлари. – 2026. – T. 1, № 1. – P. 3-21. – DOI: 10.65449/journalofmodernchemistry.v1i1.12116.
MLAAkbarov, Khamdam, Yong-Ill Lee, Kattaev, Nuritdin, Mamatov, Jaykhun, Mirzakhidov1, Khayrulla, and Kolyadin, Vladimir. “ENGINEERING MULTISCALE POROSITY AND ADSORPTION THERMODYNAMICS IN PAN–SILICA HYBRID NANOCOMPOSITES: LINKING SOL–GEL SYNTHESIS WITH SURFACE ENERGY HETEROGENEITY.” Ўзбекистон Миллий университети хабарлари, 1(1), 3-21, 2026. https://doi.org/10.65449/journalofmodernchemistry.v1i1.12116
ChicagoAkbarov, Khamdam, Yong-Ill Lee, Kattaev, Nuritdin, Mamatov, Jaykhun, Mirzakhidov1, Khayrulla, and Kolyadin, Vladimir. “ENGINEERING MULTISCALE POROSITY AND ADSORPTION THERMODYNAMICS IN PAN–SILICA HYBRID NANOCOMPOSITES: LINKING SOL–GEL SYNTHESIS WITH SURFACE ENERGY HETEROGENEITY.” Ўзбекистон Миллий университети хабарлари, 1(1), 3-21 (2026). https://doi.org/10.65449/journalofmodernchemistry.v1i1.12116
HarvardAkbarov, Khamdam, Yong-Ill Lee, Kattaev, Nuritdin, Mamatov, Jaykhun, Mirzakhidov1, Khayrulla, and Kolyadin, Vladimir (2026) ‘ENGINEERING MULTISCALE POROSITY AND ADSORPTION THERMODYNAMICS IN PAN–SILICA HYBRID NANOCOMPOSITES: LINKING SOL–GEL SYNTHESIS WITH SURFACE ENERGY HETEROGENEITY’, Ўзбекистон Миллий университети хабарлари, 1(1), 3-21. https://doi.org/10.65449/journalofmodernchemistry.v1i1.12116
BibTeX
@article{akbarovkhamdam2026,
  title = {ENGINEERING MULTISCALE POROSITY AND ADSORPTION THERMODYNAMICS IN PAN–SILICA HYBRID NANOCOMPOSITES: LINKING SOL–GEL SYNTHESIS WITH SURFACE ENERGY HETEROGENEITY},
  author = {Akbarov, Khamdam and Yong-Ill Lee and Kattaev, Nuritdin and Mamatov, Jaykhun and Mirzakhidov1, Khayrulla and Kolyadin, Vladimir},
  journal = {Ўзбекистон Миллий университети хабарлари},
  year = {2026},
  volume = {1},
  number = {1},
  pages = {3-21},
  doi = {10.65449/journalofmodernchemistry.v1i1.12116},
  url = {https://doi.org/10.65449/journalofmodernchemistry.v1i1.12116}
}

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