Synthesis of core–shell bioaffinity chitosan–TiO2 composite and its environmental applications
Abstract
Based on the coupling of molecular imprinting, chitosan biosorption, and nano TiO2 photocatalysis technologies, a novel core-shell organic-inorganic hybrid material of surface imprinted chitosan-TiO2 composite (SICT) was prepared with methyl orange as the template. SEM, EDS, AFM, pore size analysis, and FTIR characterization results illustrated that TiO2 nano powder was successfully coated on the surface of chitosan microparticles via intermolecular hydrogen bonds to form the core-shell organic-inorganic composites with rough and porous surface morphology. SICT showed enhanced photocatalytic selectivity for methyl orange (M.O.) compared with the non-imprinted chitosan-TiO2 composites because of the existing of more suitable sites generated by surface molecular imprinting. The removal of M.O. by SICT was mainly from the photocatalytic degradation rather than simple adsorption. SICT could be reused directly without further desorption and regeneration for 10 cycles with preserving 60% of its photocatalytic efficiency. The reusability of SICT would be beneficial for the simplification of the operating steps and the cost reduction which facilitated its practical applications in wastewater treatment concerning environmental organic pollutants.
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SICT could be reused directly without further desorption and regeneration for 10 cycles while retaining 60% of its photocatalytic efficiency.
“In addition, SICT could be reused directly without further desorption and regeneration for 10 cycles while retaining 60% of its photocatalytic efficiency.”
From Sustainable hybrid photocatalysts: titania immobilized on carbon materials derived from renewable and biodegradable resources (2016) · cites this paper as [67]
The chemical stability of chitosan is unsatisfactory because abundant free amines, with a pKa of ∼6.5, can be protonated, culminating in hydro-solubility under acidic conditions.
“Although chitosan has shown promise as a biosorbent, the chemical stability of chitosan is unsatisfactory because the abundant free amines, with a pK a value of ∼6.5, can be protonated culminating in hydro-solubility under acidic conditions.67,68”
From Sustainable hybrid photocatalysts: titania immobilized on carbon materials derived from renewable and biodegradable resources (2016) · cites this paper as [67]
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- Authors
- Xiao, G., Su, H., & Tan, T.
- Affiliations
- Beijing University of Chemical Technology (CN)
- Corresponding author
- Su, Haijia
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2015-02
- Volume
- 283
- Pages
- 888-896
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W2086566256
- Cited by
- 85
- References
- 38
- Citations by year
- 2026: 1 · 2025: 5 · 2024: 7 · 2023: 4 · 2022: 8 · 2021: 5 · 2020: 7 · 2019: 12 · 2018: 7 · 2017: 16 · 2016: 9 · 2015: 4
- FWCI
- 3.19
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Chemistry › Analytical Chemistry › Analytical chemistry methods development
- Keywords
- core-shell composites, surface imprinting, photocatalytic degradation, methyl orange, titanium dioxide nanoparticles, organic-inorganic hybrid materials, dye removal, wastewater treatment, adsorbent reusability, environmental pollutants
- MeSH terms
- Adsorption, Azo Compounds, Coloring Agents, Titanium, Water Pollutants, Chemical, Porosity, Chitosan, Metal Nanoparticles, Molecular Imprinting, Photochemical Processes
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