Photodecomposition of bisphenol A on nanometer-sized TiO2 thin film and the associated biological toxicity to zebrafish (Danio rerio) during and after photocatalysis

Yeo, Min‐Kyeong; Kang, Misook

doi:10.1016/j.watres.2005.12.034

Cited by 51 publications

(21 citation statements)

References 26 publications

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“…BPA was perfectly decomposed in the UV-A radiation/air bubbling/0.5 carbon/9.5 TiO 2 photocatalytic system after 210 min (3.5 h). As previously reported, 13 10.0 ppm BPA was decomposed after 52 hours in pure TiO2. However, in this present study, 49% of the 5.0 ppm BPA was photodecomposed in the pure TiO2 system after 5 hours, which was an improvement over the previous results.…”

Section: Resultssupporting

confidence: 83%

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TiO₂/Carbon Composites Prepared from Rice Husk and the Removal of Bisphenol A in Photocatalytic Liquid System

Kim¹,

Kwak²,

Kang³

2010

Bulletin of the Korean Chemical Society

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The improved photocatalytic performance of a carbon/TiO2 composite was studied for the Bisphenol A (BPA) decomposition. Titanium tetraisopropoxide (TTIP) and a rice husk from Korea were heterogeneously mixed as the titanium and carbon sources, respectively, for 3 h at room temperature, and then thermally treated at 600 o C for 1 h in H2 gas. The transmission electron microscopy (TEM) images revealed that the bulk carbon partially covered the TiO2 particles, and the amount that was covered increased with the addition of the rice husk. The acquired carbon/TiO2 composite exhibited an anatase structure and a novel peak at 2θ = 32 o , which was assigned to bulk carbon. The specific surface area was significantly enhanced to 123 ~ 164 m 2 /g in the carbon/TiO2 composite, compared to 32.43 m 2 /g for the pure TiO2. The X-ray photoelectron spectroscopy (XPS) results showed that the Ti-O bond was weaker in the carbon/TiO2 composite than in the pure TiO2, resulting in an easier electron transition from the Ti valence band to the conduction band. The carbon/TiO2 composite absorbed over the whole UV-visible range, whereas the absorption band in the pure TiO2 was only observed in the UV range. These results agreed well with an electrostatic force microscopy (EFM) study that showed that the electrons were rapidly transferred to the surface of the carbon/TiO2 composite compared to the pure TiO2. The photocatalytic performance of the BPA removal was optimized at a Ti:C ratio of 9.5:0.5, and this photocatalytic composite completely decomposed 10.0 ppm BPA after 210 min, whereas the pure TiO2 achieved no more than 50% decomposition under any conditions.

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Section: Resultssupporting

confidence: 83%

“…They also investigated the effects of various parameters, such as the film thickness, the UV radiation intensity, and the pH, on the photodegradation. Kang et al 13 also reported that alkali metal-TiO2 particles have an anatase structure and were ca. 50 -100 nm in size with a surface area of ca.…”

Section: Introductionmentioning

confidence: 99%

TiO₂/Carbon Composites Prepared from Rice Husk and the Removal of Bisphenol A in Photocatalytic Liquid System

Kim¹,

Kwak²,

Kang³

2010

Bulletin of the Korean Chemical Society

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“…On the other hand, there have been many studies on biological applications of TiO 2 in recent years, but there are a relatively small number of studies investigating toxic effects of nanometals on aquatic organisms (Yeo and Kang, 2006).…”

Section: Discussionmentioning

confidence: 99%

Effect of nanosized TiO2 particles on the development of Xenopus laevis embryos

Birhanli¹,

Emre

Sayılkan³

et al. 2014

Turk J Biol

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This paper reports the toxic properties of nano-TiO 2 on 2 different early life stages of Xenopus laevis. Synthesis of nano-TiO 2 particles was carried out by the hydrothermal method. Characterization of nanoparticles was performed using spectral techniques including X-ray diffraction, scanning electron microscopy, and a particle-size analyzer. Embryos at the 8th stage and tadpoles at the 46th stage were exposed to 7 concentrations of nano-TiO 2 in the range of 5 to 320 ppm. After 96 h of exposure, the mortality percentage of each exposure concentration was calculated and the activity of enzyme biomarkers acetylcholinesterase, carboxylesterase, glutathione S-transferase, glutathione reductase, lactate dehydrogenase, and aspartate aminotransferase were determined in living embryos and tadpoles. None of the tested concentrations of TiO 2 caused statistically significant mortality or malformation (only for the embryo test) as compared to the control groups. Furthermore, we did not observe any significant changes in enzyme activities in tadpole samples from the 46th stage, although some minor changes not related to the concentrations were observed in embryos.

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“…The decomposition of Bisphenol A was carried out using bed photoreactors designed in the laboratory. 16 To prepare the photodecomposition, 0.5 g of TiO 2 /nanoporous SnO 2 powders (1.0:1.0 weight ratio) was added into a Pyrex cylinder reactor with 2.0 L volume. The initial concentration of Bisphenol A was 10.0 ppm/1.0 L. A UV-lamp (model BBL, 24 W/cm 2 , 30 cm length × 2.0 cm diameter, Shinan Co., Korea) emitting 365 nm light was used.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of Nanoporous Structured SnO₂and its Photocatalytic Ability for Bisphenol A Destruction

Kim¹,

Lee²,

Kang³

2011

Bulletin of the Korean Chemical Society

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Nanoporous structured tin dioxide (SnO 2 ) is characterized and its application in the photocatalytic destruction of endocrine, Bisphenol A, is examined. Transmission electron microscopy (TEM) reveals irregularly shaped nanopores of size 2.0-4.5 nm. This corresponds to the result of an average nanopore distribution of 4.5 nm, as determined by Barret-Joyner-Halenda (BJH) plot from the isotherm curve. The photoluminescence (PL) curve, corresponding to the recombination between electron and hole, largely decreases in the TiO 2 /nanoporous SnO 2 composite. Finally, a synergy effect between TiO 2 and porous SnO 2 is exhibited in photocatalysis: the photocatalytic destruction of Bisphenol A is improved by combining the nanoporous structured SnO 2 with TiO 2 , and 75% decomposition of 10.0 ppm of Bisphenol A is achieved after 24 h.

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Photodecomposition of bisphenol A on nanometer-sized TiO2 thin film and the associated biological toxicity to zebrafish (Danio rerio) during and after photocatalysis

Cited by 51 publications

References 26 publications

TiO₂/Carbon Composites Prepared from Rice Husk and the Removal of Bisphenol A in Photocatalytic Liquid System

TiO₂/Carbon Composites Prepared from Rice Husk and the Removal of Bisphenol A in Photocatalytic Liquid System

Effect of nanosized TiO2 particles on the development of Xenopus laevis embryos

Synthesis of Nanoporous Structured SnO₂and its Photocatalytic Ability for Bisphenol A Destruction

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Photodecomposition of bisphenol A on nanometer-sized TiO2 thin film and the associated biological toxicity to zebrafish (Danio rerio) during and after photocatalysis

Cited by 51 publications

References 26 publications

TiO2/Carbon Composites Prepared from Rice Husk and the Removal of Bisphenol A in Photocatalytic Liquid System

TiO2/Carbon Composites Prepared from Rice Husk and the Removal of Bisphenol A in Photocatalytic Liquid System

Effect of nanosized TiO2 particles on the development of Xenopus laevis embryos

Synthesis of Nanoporous Structured SnO2and its Photocatalytic Ability for Bisphenol A Destruction

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Product

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TiO₂/Carbon Composites Prepared from Rice Husk and the Removal of Bisphenol A in Photocatalytic Liquid System

TiO₂/Carbon Composites Prepared from Rice Husk and the Removal of Bisphenol A in Photocatalytic Liquid System

Synthesis of Nanoporous Structured SnO₂and its Photocatalytic Ability for Bisphenol A Destruction