Solar Photocatalytic Degradation of Atrazine in Water by TiO2/Ag Nanocomposite

Ge, Ming; Azouri, Assaf; Xun, Kun; Sattler, K.; Lichwa, Joe; Ray, Chittaranjan

doi:10.1115/mn2006-17070

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…Most of the electron-hole pairs produced recombine after some tens of picoseconds with the energy being released as emission of photons, phonons or both [40]. Coordination defects at the surface of the particle and defects within the particle lattice trap the remaining charges [41]. The holes trapped at the surface have a highly reactive oxidation potential and the electrons have a highly reactive reduction potential.…”

Section: Description and Discussion Of Results From The Various Stmentioning

confidence: 99%

Coupled Microwave/Photoassisted Methods for Environmental Remediation

Horikoshi

Serpone

2014

Molecules

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Abstract:The microwave-induced acceleration of photocatalytic reactions was discovered serendipitously in the late 1990s. The activity of photocatalysts is enhanced significantly by both microwave radiation and UV light. Particularly relevant, other than as a heat source, was the enigmatic phenomenon of the non-thermal effect(s) of the microwave radiation that facilitated photocatalyzed reactions, as evidenced when examining various model contaminants in aqueous media. Results led to an examination of the possible mechanism(s) of the microwave effect(s). In the present article we contend that the microwaves' non-thermal effect(s) is an important factor in the enhancement of TiO2-photoassisted reactions involving the decomposition of organic pollutants in model wastewaters by an integrated (coupled) microwave-/UV-illumination method (UV/MW). Moreover, such coupling of no less than two irradiation methods led to the fabrication and ultimate investigation of microwave discharged electrodeless lamps (MDELs) as optimal light sources; their use is also described. The review focuses on the enhanced activity of photocatalytic reactions when subjected to microwave radiation and concentrates on the authors' research of the past few years.

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Section: Description and Discussion Of Results From The Various Stmentioning

confidence: 99%

Coupled Microwave/Photoassisted Methods for Environmental Remediation

Horikoshi

Serpone

2014

Molecules

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Photodeposition of Pd nanoparticles on TiO 2 utilizing a channel type quartz reactor

Dadsetan

Baghshahi

Farshidfar

et al. 2017

Ceramics International

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Zeta Potential Studies of Titanium Dioxide and Silver Nanoparticle Composites in Water-Based Colloidal Suspension

Azouri

Xun

et al. 2006

Multifunctional Nanocomposites

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We determine the zeta potential (ZP) by using electrophoretic laser light scattering and Laser Doppler Velocimetry (LDV). Particle sizes are measured by photon correlation spectroscopy (PCS). We studied the ZP for colloidal suspensions of TiO2 and Ag metal particles in order to determine the kinetic interaction and charge exchange between the particles. We investigated the natural tendency of the particles for aggregation and varied the pH of the solution. It was found that the ZP versus pH curve for the mixed TiO2/Ag did not behave as the average of the individual TiO2 and Ag curves as one would expect, and instead there was a slight horizontal shift towards higher pH values which implies that the particles in the mixed TiO2/Ag colloid are interacting with the result of charge exchange. The average particle size was measured in terms of effective diameter, for the TiO2, Ag and the mixed TiO2/Ag particles. The results indicated an increase of approximately 100 nm in the effective diameter of the mixed TiO2/Ag particles size compared to the size of the individual TiO2 particles. This can be explained as the fact that 50 nm Ag particles are adsorbed on the surface of the TiO2 particles.

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Solar Photocatalytic Degradation of Atrazine in Water by TiO2/Ag Nanocomposite

Cited by 3 publications

References 25 publications

Coupled Microwave/Photoassisted Methods for Environmental Remediation

Coupled Microwave/Photoassisted Methods for Environmental Remediation

Photodeposition of Pd nanoparticles on TiO 2 utilizing a channel type quartz reactor

Zeta Potential Studies of Titanium Dioxide and Silver Nanoparticle Composites in Water-Based Colloidal Suspension

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