Photocatalytic decolourisation of Reactive Red 4 dye by an immobilised TiO2/chitosan layer by layer system

Nawi, Mohd Nasrun Mohd; Sabar, S.; Sheilatina,

doi:10.1016/j.jcis.2012.01.024

Cited by 64 publications

(38 citation statements)

References 44 publications

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“…Thus for photocatalytic application, TiO 2 has been modified into a layer of film or immobilized on inorganic materials such as zeolite (Wijaya et al, 2006), silica (Shiraishi et al, 2009), resins (Wahyuni et al, 2010), activated carbon (Andayani and Sumartono, 2007) and glass fiber (Pandiangan and Simanjuntak, 2013), as well as organic material such as polyurethane (Burgess, 2007) and chitosan (Chen et al, 2010;Qian et al, 2011;Zainal et al, 2009;Nawi et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…(Chang et al, 2011;Wang et al, 2011;Cheng et al, 2010). Chitosan is also favored as a host material because its optical and electronic properties support the metal oxide functions of photocatalyst (Guibal, 2005), as well as diffuse the charge to the target compound (Nawi et al, 2012). Economically, chitosan is also relatively cheap because it is abundantly obtainable from exoskeleton of shrimp (crustacea), crab, clams (mollusc) and insects.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of pH and Aging Time on the Synthesis of TiO2 – Chitosan Nanocomposites as Photocatalyst by Sol-Gel Method at Room Temperature

Fajriati

Mudasir

Wahyuni

2017

Molekul

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The synthesis of TiO 2 -chitosan nanocomposite photocatalyst using Titanium(IV)-Isopropoxide (TTIP) as precursors and chitosan as host material has been conducted. The synthesis was carried out using a sol-gel method at room temperature and aging to grow crystal seeds and generate nanoparticles. The success of forming nano-sized anatase phase TiO 2 nanocrystal was strongly influenced by the sol pH system during hydrolysis and the aging time. The effect of sol pH system and aging time to the crystallinity level and particle size were examined using X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and Diffuse Reflectance UV-Spectroscopy (DR-UV). The results showed that TiO 2 produced in acidic pHs (pH 2-4) tended to have higher crystallinity level than that produced in weakly alkaline (pH > 6), which prone to be amorphous. The longer aging time (> 14 days) also tended to produce the amorphous phase. Furthermore, chitosan as a host material had a notable influence in determining the crystallinity level and particle size of TiO 2 in TiO 2 -chitosan nanocomposite.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of pH and Aging Time on the Synthesis of TiO2 – Chitosan Nanocomposites as Photocatalyst by Sol-Gel Method at Room Temperature

Fajriati

Mudasir

Wahyuni

2017

Molekul

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“…The combination between semiconductor photocatalyst and light sources is the key process of photodegradation. Among of the semiconductor, titanium dioxide (TiO 2 ) is the most popular and widely used by researchers due to its chemical stability, low cost, atoxic, capability for the reusable and its high photocatalytic activity [1][2][3][4]. This material consist a wide band gaps between 3.0 eV to 3.2 eV which require the UV light irradiation which means that only (4-6%) of sunlight has the required energy to activate the photocatalyst [5].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nitrogen Co-Doped P25: Parameter Study on Photodegradation of Reactive Red 4

Jalil

Nawawi

Ishak

et al. 2016

MATEC Web of Conferences

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Abstract. Photocatalytic degradation rate of reactive red 4 (RR4) using carbon coated nitrogen doped TiO2 (C N co-doped TiO2) in photocatalysis process is main goal on this research. The main operating the parameters such as effect of initial dye concentration, catalyst loading, aeration flow rate and initial pH on degradation of RR4 under 45 W fluorescent lamp was investigated. photocatalytic activity of RR4 dye decreased with increasing RR4 dye concentration. The optimum loading is around 0.04 g and optimum aeration rate is about 25 mL min -1 of C N co-doped TiO2. Effect of pH was conducted based on the optimum loading and conclude that the photocatalytic degradation of RR4 became faster at pH 2 -7. For the future work, the modification of doping with others element like non-metal or metal with C N co-doped TiO2 can be enhanced toward the higher efficieny of photodegradation under visible light. Moreover, the immobilized technique can be used in future to overcome the difficulty of filtration on suspension.

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“…One of the biggest effluents generated from the industries are dyes. These dyes are toxic and give serious hazard to human and aquatic life [1]. Therefore, researcher from all over the world has been working on various approaches in order to solve these issues.…”

Section: Introductionmentioning

confidence: 99%

A Study on RR4 Dye as a Sensitizer in Enhancing Photoactivity of Immobilized Photocatalysts

Bakar

Jalil

Ain

et al. 2016

MATEC Web of Conferences

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Abstract. In this work, anionic RR4 dye was used to sensitize TiO2/PVA and TiO2/PEG immobilized system in enhancing photocatalytic degradation of cationic methylene blue (MB) dye. 0.3g of TiO2 and polymer binder was coated onto a clean glass plate by using brush technique to develop optimum immobilize TiO2 system. A comparison study between immobilized TiO2/PVA (Im/TiO2/PVA) and Immobilized TiO2/PEG (Im/TiO2/PEG) system with and without RR4 sensitizer were carried out under 45 W fluorescent lamp and visible light irradiation. The photocatalytic degradation of MB was significantly enhanced for both RR4 dye sensitized Im/TiO2/PVA and Im/TiO2/PEG with 1st order rate constant was ca. 0.035 and 0.030 min-1 respectively under 45-W fluorescent lamp. Same observation as well under visible light irradiation whereby enhanced of those RR4 sensitized immobilized photocatalysts were recorded as compared with immobilized photocatalysts without RR4 as sensitizer. The photocatalytic enhancement under Im/TiO2/PVA/RR4 and Im/TiO2/PEG/RR4 are due to the ability of RR4 dye to become electron (e-) donor for conduction band (CB) of TiO2, thus making TiO2 CB riches with electron, eventually this e-is used to remove MB by producing hydroxyl radical.

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Photocatalytic decolourisation of Reactive Red 4 dye by an immobilised TiO2/chitosan layer by layer system

Cited by 64 publications

References 44 publications

The Effect of pH and Aging Time on the Synthesis of TiO2 – Chitosan Nanocomposites as Photocatalyst by Sol-Gel Method at Room Temperature

The Effect of pH and Aging Time on the Synthesis of TiO2 – Chitosan Nanocomposites as Photocatalyst by Sol-Gel Method at Room Temperature

Carbon Nitrogen Co-Doped P25: Parameter Study on Photodegradation of Reactive Red 4

A Study on RR4 Dye as a Sensitizer in Enhancing Photoactivity of Immobilized Photocatalysts

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