Room temperature synthesis of TiO 2 supported chitosan photocatalyst: Study on physicochemical and adsorption photo-decolorization properties

Afzal, Saba; Samsudin, Emy Marlina; Mun, Lee Kian; Julkapli, Nurhidayatullaili Muhd; Hamid, Sharifah Bee Abd

doi:10.1016/j.materresbull.2016.09.028

Cited by 24 publications

(7 citation statements)

References 47 publications

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“…Moreover, a CdS/TiO 2 /CS composite could be also used for Congo red degradation [77]. Afzal et al [94] reported that TiO 2 -supported CS exhibited a complete degradation of MO within 90 min of UV exposure. Similarly, Zainal et al [8] mentioned that during MO-removal (87%) from water using a CS-TiO 2 composite, the reactive -NH 2 and -OH functional groups of CS and TiO 2 are directly responsible for the photodegradation-adsorption process during abatement of various wastewater pollutants.…”

Section: Environmental Applicationsmentioning

confidence: 99%

Chitosan-TiO2: A Versatile Hybrid Composite

et al. 2020

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In recent years, a strong interest has emerged in hybrid composites and their potential uses, especially in chitosan-titanium dioxide (CS-TiO 2 ) composites, which have interesting technological properties and applications. This review describes the reported advantages and limitations of the functionalization of chitosan by adding TiO 2 nanoparticles. Their effects on structural, textural, thermal, optical, mechanical, and vapor barrier properties and their biodegradability are also discussed. Evidence shows that the incorporation of TiO 2 onto the CS matrix improves all the above properties in a dose-dependent manner. Nonetheless, the CS-TiO 2 composite exhibits great potential applications including antimicrobial activity against bacteria and fungi; UV-barrier properties when it is used for packaging and textile purposes; environmental applications for removal of heavy metal ions and degradation of diverse water pollutants; biomedical applications as a wound-healing material, drug delivery system, or by the development of biosensors. Furthermore, no cytotoxic effects of CS-TiO 2 have been reported on different cell lines, which supports their use for food and biomedical applications. Moreover, CS-TiO 2 has also been used as an anti-corrosive material. However, the development of suitable protocols for CS-TiO 2 composite preparation is mandatory for industrial-scale implementation.Materials 2020, 13, 811 2 of 27 they are synthesized by different methods (intercalation of the polymer, sol-gel, hydrothermal, electro-deposition, chemical and physical vapor deposition, suspension and liquid phase deposition). These methods are effective to enhance the technological and mechanical properties of each individual component and also reveal new functionalities [1,3]. Currently, there is a special interest in combining natural polymers such as chitosan (CS) with inorganic materials like titanium dioxide (TiO 2 ) to obtain hybrid composites (CS-TiO 2 ) with beneficial properties [3][4][5][6].Chitosan (CS) is a natural biopolymer (linear polysaccharide comprising 1-4 linked 2-amino-deoxy-β-D-glucan) generally obtained by deacetylation of chitin, the main structural component of crustacean exoskeletons. CS exhibits a poly-cationic character and is non-toxic and biodegradable [7]. CS is considered a biological functional compound with multiple interesting properties. It can form films for food and pharmaceutical applications, including edible coatings, packaging material, or as drug-eluting carrier [5,7]. Its adsorbent capacity can have environmental applications during photocatalytic processes of waste-water treatment [8], and it also has inherent antibacterial and antifungal properties [9]. It is biocompatible with several organic and inorganic compounds by the presence of free amino and hydroxyl functional groups in its structure, which can react with other functional groups by electrostatic forces, hydrogen bonds, or by compound-soak up into the polymeric matrix, thus improving its mechanical and biological properties [10]...

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Section: Environmental Applicationsmentioning

confidence: 99%

Chitosan-TiO2: A Versatile Hybrid Composite

et al. 2020

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“…In order to develop a sustainable, economic, and green oxidation process, solar irradiation has been selected instead of ultraviolet light. Because photocatalysts have lots of advantages, many researches have been conducted to harness these superior properties . This included the incorporation of photocatalysts into polymeric membrane resulted in a boost in the membrane performance .…”

Section: Introduction: Water Purification Systemmentioning

confidence: 99%

Polymers for catalysis in water purification

Julkapli

2017

Polymers for Advanced Techs

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purification technologies. Insufficient access to safe and clean drinking water is one of the most demanding needs of the people throughout the world. The consequences are death casualty of millions of people annually, mostly under the age of 5, by the diseases transmitted through contaminated water or human. Recent, flare-up growth of polymeric technologies offers to handle such water purification as an adsorbent, catalyst, and sensors. This is due to its high reactivity, selectivity, and specific surface area. The nanocatalyst loaded polymeric system has been applied for the selective and efficient removal of pollutants from aqueous sources and demonstrated a highly resistant against mechanical stress, high temperature, pressure, and solvents. Different techniques including membrane technology, photocatalyst, and adsorbent have provided a medium for the polymeric catalyst. These series of metal oxide photocatalyst have been applied for several types of polymers including polysulfonate, poly(ether) sulfone, polyvinyl acetate, stract, polyurethane, and polyamide. It recorded that, the polymeric catalyst system is frequently utilized without loss of their specific adsorption and catalytic properties.The combined effects of water chemistry, nature of catalyst particles, loading capacity, and catalyst incorporation conditions for each system have been discussed in details.

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“…Many studies have been conducted to enhance the catalytic efficiency of TiO2 by doping with metals or nonmetals [5]. Another way is to suppress the recombination of excited e -and h + by supporting TiO2 on substrates such as zeolite, silica, activated carbon, alumina, and chitosan [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Chitosan is a linear polysaccharide including amino and hydroxyl functional groups. Immobilizing TiO2 nanoparticles with chitosan could enhance the specific surface area and pore size [3,6,[9][10][11][12][13][14]. Zainal et al [3] showed that TiO2-Chitosan/Glass catalyst was efficient for removing monoazo dye via the combined effect of photocatalysis-adsorption.…”

Section: Introductionmentioning

confidence: 99%

“…Zainal et al [3] showed that TiO2-Chitosan/Glass catalyst was efficient for removing monoazo dye via the combined effect of photocatalysis-adsorption. Afzal et al [6] synthesized TiO2 supported chitosan nanocomposites by in-situ sol gel method and found that the reactive NH2 and OH -functional groups of chitosan were responsible for the methyl orange adsorption-photodecolorization process. Nawi et al [11] stated that immobilized TiO2/chitosan catalyst had attractive features like long-term stability and super oxidizing agents.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Photocatalytic Activity of Chitosan/Poly(vinyl alcohol)/TiO2/Boron Nanocomposites

Şimşek

2017

SDÜ Fen Bil Enst Der

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In the current work, A series of chitosan/poly(vinyl alcohol)/TiO2/boron nanocomposites (CS/P/Ti-B) were prepared and their activity in the photocatalytic removal of non-steroidal anti-inflammatory drug (ibuprofen (IBP)) were evaluated for the first time. The nanocomposites were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrum (FT-IR), and thermogravimetric analysis (TG-DTG). TGA thermograms showed the enhanced thermal stability of nanocomposites with increasing Ti-B content. In the photocatalytic experiments, the effects of Ti-B content, catalyst dosage and initial concentration were discussed and a suitable photodegradation process for enhanced removal was proposed. The photocatalytic removal of IBP increased with increasing Ti-B ratio and the kinetic rate constant of Ti-B increased from 4.516 × 10 −2 min -1 (for raw Ti-B) to 5.346 × 10 −2 min -1 (for CS/P/Ti-B/1). This increment could be attributed to the decreased recombination rate of the photogenerated electron-hole pairs. Özet: Bu çalışmada, kitosan/poli vinil alkol/TiO2/bor nanokompozitleri (CS/P/Ti-B) sentezlenmiş ve non-steroidal anti-inflamatuar ilaç (ibuprofen (IBP)) fotokatalitik giderim performansları ilk kez incelenmiştir. Nanakompozitler; taramalı elektron mikroskobu (SEM), X-ray fotoelektron spektroskopisi (XPS), Fourier Dönüşümlü Kızılötesi (FTIR) Spektroskopisi ve termogravimetrik analiz (TG-DTG) ile karakterize edilmiştir. TGA termogram sonuçlarına göre, Ti-B içeriği arttıkça nanokompozitlerin termal kararlılığının arttığı gözlenmiştir. Fotokatalitik çalışmalarda yapıdaki Ti-B içeriği, katalizör dozu ve başlangıç konsantrasyon etkisi incelenmiş ve uygun bir fotobozunma prosesi tartışılmıştır. Ti-B oranı arttıkça IBP fotokatalitik bozunma oranı artmış ve kinetik hız sabiti 4.516 × 10 −2 dak -1 '(saf Ti-B için) değerinden 5.346 × 10 −2 dak -1 (CS/P/Ti-B/1 için) değerine yükselmiştir. Bu artış, ışın altında uyarılmış elektron boşluk çiftlerinin düşük rekombinasyon hızından kaynaklanmaktadır. Kitosan

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Room temperature synthesis of TiO 2 supported chitosan photocatalyst: Study on physicochemical and adsorption photo-decolorization properties

Cited by 24 publications

References 47 publications

Chitosan-TiO2: A Versatile Hybrid Composite

Chitosan-TiO2: A Versatile Hybrid Composite

Polymers for catalysis in water purification

Investigation of Photocatalytic Activity of Chitosan/Poly(vinyl alcohol)/TiO2/Boron Nanocomposites

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