Photocatalytic degradation of photosensitizing and non-photosensitizing dyes over chromium doped titania photocatalysts under visible light

Koh, Pei Wen; Hatta, Mohd Hayrie Mohd; Ong, Siew Teng; Yuliati, Leny; Lee, Siew Ling

doi:10.1016/j.jphotochem.2016.08.027

Cited by 43 publications

(19 citation statements)

References 35 publications

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“…35 The N2 adsorption-desorption isotherms of prepared TiO2 and V-TiO2/MCM with different surfactants used were depicted in the Figure 4(a-e). From the isotherm, both TiO2 and V-TiO2 showed a type III isotherm with hysteresis type H3 [25][26]32] while others showed a type IV isotherm with uniform mesopores [27][28][29]32]. The presence of hysteresis loop in both TiO2 and V-TiO2 isotherm in relative pressure (P/P0) between 0.5 and 0.9 was due to interparticle porosity [33].…”

Section: Resultsmentioning

confidence: 96%

“…The DR UV-Vis spectroscopy analysis as shown in Figure 5 demonstrated a red-shift after the addition of V into TiO2. The shifting to longer wavelength was due to several factors such as the decrease in band gap energy as more rutile phase of TiO2 was formed [25,26]. It was reported that rutile phase has low band gap energy compared to anatase phase [15].…”

Section: Resultsmentioning

confidence: 99%

“…The wide peak at around 240-260 nm corresponded to tetrahedral Ti species while peak at ca. 300 corresponded to octahedral Ti species [25,26].…”

Section: Resultsmentioning

confidence: 99%

“…The unmodified TiO2 photocatalyst was prepared via a sol-gel method similar as reported in the literature [25,26]. In the preparation of TiO2, titanium tetraisopropoxide (TTIP, Ti{OCH(CH3)2}4) was added with absolute ethanol as solvent and acetylacetone as chelating agent according to the molar ratio of 1: 100: 2.…”

Section: Preparation Of Unmodified Tio2mentioning

confidence: 99%

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Properties and Photocatalytic Behaviour of Vanadia Loaded Titania Supported on MCM-41 Synthesized using Different Surfactants for Degradation of Methylene Blue

Ooi¹,

Hatta²,

Lee³

2020

J. Idn. Chem. Soc.

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An attempt has been carried out to prepare vanadia loaded TiO2 supported on MCM-41(V-TiO2/MCM-41) nanostructured photocatalysts using different surfactants. The surfactants used in the photocatalysts synthesis were dodecyl-trimethyl-ammonium bromide (DTAB), hexadecyl-trimethyl-ammonium bromide (CTAB) and octadecyl-trimethyl-ammonium bromide (STAB) which have varied carbon chains. The effect of crystallinity, surface area and porosity of the MCM-41 support on the physical-chemical properties of synthesized photocatalysts of vanadia loaded TiO2/MCM-41 and their photocatalytic performance were investigated. X-ray diffraction (XRD) patterns showed that the crystallinity of vanadia-TiO2/MCM-41 decreased with increasing of carbon-chain number of the surfactant used. Both surface area and pore volume of V-TiO2 increased significantly from 16.2 m2/g and 0.034 cm3/g to 864.3 m2/g and 0.618 cm3/g, respectively, after being loaded on MCM-41 support which was prepared using CTAB. It was demonstrated that all the V loaded TiO2/MCM-41 materials exhibited remarkable improvement in photocatalytic degradation of methylene blue (MB) under the irradiation of visible light as compared to that of bare TiO2 and V-TiO2. Among these materials, V-TiO2/MCM-41 which was synthesized using CTAB appeared to be the best photocatalyst with 57% of MB removal under visible light irradiation.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

“…The wide peak at around 240-260 nm corresponded to tetrahedral Ti species while peak at ca. 300 corresponded to octahedral Ti species [25,26].…”

Section: Resultsmentioning

confidence: 99%

Section: Preparation Of Unmodified Tio2mentioning

confidence: 99%

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Properties and Photocatalytic Behaviour of Vanadia Loaded Titania Supported on MCM-41 Synthesized using Different Surfactants for Degradation of Methylene Blue

Ooi¹,

Hatta²,

Lee³

2020

J. Idn. Chem. Soc.

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“…The undoped TiO 2 showed absorbance in the shorter wavelength region while La:Co:TiO 2 nanocomposite results showed a red shift in the absorption onset value in the case of La and Ni impregnated Titania. The impregnation of La and Co ions into TiO 2 could shift its optical absorption edge from UV into visible light range, due to prominent change in TiO 2 band gap was observed [46]. Aqueous suspensions of the samples were used for the UV absorption studies.…”

Section: Uv-vis Diffuse Reflectance Spectroscopy (Drs)mentioning

confidence: 99%

Synthesis of La:Co:TiO<sub>2</sub> Nanocomposite and Photocatalytic Degradation of Tartaric Acid in Water at Various Parameters

Kumar¹

2017

NANO

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Abstract:In this study, nanocomposites of La:Co:TiO 2 was prepared by the co-precipitation method. The alcoholic route of synthesis was adopted here which was gives greenish homogeneous powder of La:Co:TiO 2 . The material was found in the nanodiamension by the SEM analysis. The rutile and anatase both phases were present in XRD analysis of the synthesized materials. The particle size was found 24 and 82 nm in case of La:Co:TiO 2 and pure Titania respectively. The surface area of Titania and La:Co:TiO 2 nanocomposites were found 6.4 and 43.2 m 2 /g. The band gap energy of Titania and La:Co:TiO 2 nanocomposites were found 3.2 eV and 3.0 eV respectively. The photodegradation of Tartaric Acid was investigate at different parameters such as temperature, concentration, pH of reaction mixture, dose of photocatalyst and time of illumination of UVVisible light. The photodegradation of Tartaric Acid occurs 60-80% in presence of Cobalt lanthanum modified Titania and in presence of neat Titania only 20-40% degradation was observed. It is found that photodegradation of Tartaric Acid follow the first order mechanism and its rate constant is become doubled when temperature is rise by 10°C.

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Influence of donor–acceptor groups on the electrical and optical properties of C50 fullerene

et al. 2021

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Photocatalytic degradation of photosensitizing and non-photosensitizing dyes over chromium doped titania photocatalysts under visible light

Cited by 43 publications

References 35 publications

Properties and Photocatalytic Behaviour of Vanadia Loaded Titania Supported on MCM-41 Synthesized using Different Surfactants for Degradation of Methylene Blue

Properties and Photocatalytic Behaviour of Vanadia Loaded Titania Supported on MCM-41 Synthesized using Different Surfactants for Degradation of Methylene Blue

Synthesis of La:Co:TiO<sub>2</sub> Nanocomposite and Photocatalytic Degradation of Tartaric Acid in Water at Various Parameters

Influence of donor–acceptor groups on the electrical and optical properties of C50 fullerene

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Photocatalytic degradation of photosensitizing and non-photosensitizing dyes over chromium doped titania photocatalysts under visible light

Cited by 43 publications

References 35 publications

Properties and Photocatalytic Behaviour of Vanadia Loaded Titania Supported on MCM-41 Synthesized using Different Surfactants for Degradation of Methylene Blue

Properties and Photocatalytic Behaviour of Vanadia Loaded Titania Supported on MCM-41 Synthesized using Different Surfactants for Degradation of Methylene Blue

Synthesis of La:Co:TiO&lt;sub&gt;2&lt;/sub&gt; Nanocomposite and Photocatalytic Degradation of Tartaric Acid in Water at Various Parameters

Influence of donor–acceptor groups on the electrical and optical properties of C50 fullerene

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Synthesis of La:Co:TiO<sub>2</sub> Nanocomposite and Photocatalytic Degradation of Tartaric Acid in Water at Various Parameters