Preparation and characterization of carbon covered TiO2 using sucrose for solar photodegradation

Yun, Seok‐Min; Palanivelu, K.; Kim, Young Ho; Kang, Phil‐Hyun; Lee, Young-Seak

doi:10.1016/j.jiec.2008.02.010

Cited by 34 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, due to the dissociation nature of the dye, the decolourization was maximum and faster in the alkaline pH when compared to that in the actual pH. Similar results were obtained in the study by Yun et al, in which the decolouization of methylene blue was favored at pH 9. Also, when observing the results from Table , the majority of methylene blue was found to be adsorbed after the dark adsorption period, which proves the maximum attraction of the cationic dye toward the catalyst in alkaline pH.…”

Section: Resultssupporting

confidence: 85%

Sunlight-Induced Photocatalytic Degradation of Organic Pollutants by Carbon-Modified Nanotitania with Vegetable Oil as Precursor

Raji

Palanivelu

2011

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

An attempt has been made in this study to prepare a nanosized titanium dioxide catalyst by an ultrasonication assisted sol−gel process at low temperature. The as-synthesized titania was modified with carbon from coconut oil as a carbon precursor in two different proportions and then subjected to thermal and microwave treatment. The characterization of the pure and carbon modified titania catalysts was accomplished by XRD, SEM, HR-SEM/EDX, UV−vis absorption spectroscopy, and BET surface area analysis. The average size of the carbon modified TiO2 catalysts was found to be in the range of 90 nm. The solar photocatalytic activity of the catalysts was monitored by the degradation of a cationic dye, methylene blue, and an anionic dye, methyl orange. The effect of pH on the degradation of the dyes was also investigated. The study revealed that the degradation of the cationic dye was highly pronounced in the alkaline pH, whereas, the degradation of the anionic dye was effective in acidic pH. A solar photochemical study was also conducted with 2,4-dichlorophenol to ensure the degradation of visible light nonabsorbing organic compounds. The study revealed that carbon-modified catalysts with about 8.0 wt % of carbon was found to have the highest solar phoactivity, when compared to the pure titania and the carbon modified titania with 42% of carbon.

show abstract

Section: Resultssupporting

confidence: 85%

Sunlight-Induced Photocatalytic Degradation of Organic Pollutants by Carbon-Modified Nanotitania with Vegetable Oil as Precursor

Raji

Palanivelu

2011

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Therefore, at basic pH, the electrostatic repulsion between the negatively charged catalyst surface and the neutral dye molecule is less on comparing the strong repulsion between the positively charged catalyst surface and methylene blue at acidic pH. Similar results were obtained in the study by Yun et al (2008), in which the degradation of methylene blue was favored at pH 9.…”

Section: Solar Photo-fenton's Degradation Of Dyessupporting

confidence: 82%

Electrospinning of Polymer-Unaided TiO₂ Fibers and Iron Impregnation for Sunlight-Induced Photo-Fenton's Degradation of Dyes

Rathinavelu

Jung

et al. 2013

Environmental Engineering Science

View full text Add to dashboard Cite

This investigation was focused on preparing TiO 2 photocatalytic fibers by electrospinning without polymer addition, impregnating ferrous ion onto the fibers, and evaluating the solar photo-Fenton's activity of the ironimmobilized catalysts. The article also highlights the major challenges overcome in the selection of suitable precursors and solvents for the electrospinning process. Characterization of the pure and iron impregnated catalysts was accomplished by X-ray diffraction, high-resolution scanning electron microscopy, energydispersive X-ray spectroscopy, and ultraviolet-visible light spectroscopy. Solar photocatalytic and solar photoFenton's activity of the catalysts were evaluated by the degradation of a cationic dye, methylene blue and an anionic dye, methyl orange. In the fiber preparation process, electrospinning with suitable precursor allows a flexible flow rate from 6 to 8 mL/h and voltage from 12 to 20 kV at a tip to collector distance of 9 cm. The diameter of the calcined and iron impregnated fibers lies in the range between 0.2 and 0.8 lm. Solar photoFenton's studies revealed that both the dyes could be degraded at a supremely faster rate than the solar photocatalytic process. Interestingly, the azo dye, methyl orange, was observed to degrade at a faster rate within 5 min (k = 19.8 · 10 -1 min -1 ) than the nonazo dye, methylene blue (9.90 · 10 -1 min -1 ), when solar photoFenton's experiments were conducted at acidic pH.

show abstract

“…And its achievement will have a great impact on society [1][2][3][4]. Among the materials that can be developed for photocatalytic applications, titanium dioxide (TiO 2 ) remains the most promising material due to its high efficiency, low cost, chemical inertness, and photostability [5][6][7][8]. TiO 2 represents an effective photocatalyst for water and air purification with self-cleaning surfaces.…”

Section: Introductionmentioning

confidence: 99%

Investigation of multielemental catalysts based on decreasing the band gap of titania for enhanced visible light photocatalysis

Yun

Lee

2009

Journal of Colloid and Interface Science

Self Cite

View full text Add to dashboard Cite

Preparation and characterization of carbon covered TiO2 using sucrose for solar photodegradation

Cited by 34 publications

References 18 publications

Sunlight-Induced Photocatalytic Degradation of Organic Pollutants by Carbon-Modified Nanotitania with Vegetable Oil as Precursor

Sunlight-Induced Photocatalytic Degradation of Organic Pollutants by Carbon-Modified Nanotitania with Vegetable Oil as Precursor

Electrospinning of Polymer-Unaided TiO₂ Fibers and Iron Impregnation for Sunlight-Induced Photo-Fenton's Degradation of Dyes

Investigation of multielemental catalysts based on decreasing the band gap of titania for enhanced visible light photocatalysis

Contact Info

Product

Resources

About

Preparation and characterization of carbon covered TiO2 using sucrose for solar photodegradation

Cited by 34 publications

References 18 publications

Sunlight-Induced Photocatalytic Degradation of Organic Pollutants by Carbon-Modified Nanotitania with Vegetable Oil as Precursor

Sunlight-Induced Photocatalytic Degradation of Organic Pollutants by Carbon-Modified Nanotitania with Vegetable Oil as Precursor

Electrospinning of Polymer-Unaided TiO2 Fibers and Iron Impregnation for Sunlight-Induced Photo-Fenton's Degradation of Dyes

Investigation of multielemental catalysts based on decreasing the band gap of titania for enhanced visible light photocatalysis

Contact Info

Product

Resources

About

Electrospinning of Polymer-Unaided TiO₂ Fibers and Iron Impregnation for Sunlight-Induced Photo-Fenton's Degradation of Dyes