Catalytic degradation of phenol in sonolysis by coal ash and H2O2/O3

Liu, H.; Liang, Mingxing; Liu, C.S.; Gao, Yu-qiong; Zhou, Ji-Zhi

doi:10.1016/j.cej.2009.06.030

Cited by 30 publications

(7 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After loading the ZDA with Fe and Ni, some large, uniform fragments were observed, and could be attributed to the preparation process. The slice fragments were not the typical hollowed spheres observed in previous research [27]. The fragments were formed from unburned carbon left by the preparation process [28].…”

Section: Catalyst Characterizationmentioning

confidence: 97%

Steam reforming of acetic acid over coal ash supported Fe and Ni catalysts

Wang

Zhang

Cai

et al. 2015

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Section: Catalyst Characterizationmentioning

confidence: 97%

Steam reforming of acetic acid over coal ash supported Fe and Ni catalysts

Wang

Zhang

Cai

et al. 2015

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

“…An increase in the degree of crystallization and in the particle size both would inhibit the adsorption of Orange I onto -Fe 2 O 3 powders. Lower adsorption of organic pollutants onto the catalyst would result in lower photocatalytic degradation [21,25]. Therefore, an increase in the reaction pH value, reaction temperature, and reaction time would result in -Fe 2 O 3 powders with lower Orange I photocatalytic degradation activities.…”

Section: Evaluation Of the Photocatalytic Activity Of -Fe 2 Omentioning

confidence: 99%

One-Step Synthesis of Spherical γ-Fe₂O₃ Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation

Chen

Liu

Zhang

et al. 2015

Journal of Chemistry

View full text Add to dashboard Cite

Maghemite (γ-Fe2O3) nanopowders were synthesized under aeration (oxidizing) conditions by aqueous synthesis in this study. The microstructures of the prepared powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and BET-BJH. The XRD analysis and the chemical experiments showed that well-crystallized γ-Fe2O3 nanoparticles were successfully obtained with a mean particle size of approximately 17 nm. The prepared γ-Fe2O3 was spherical with a BET surface area of 14.357 m2/g and a total pore volume of 0.050 cm3/g. Varying the reaction conditions, such as pH, temperature, and reaction time, we obtained crystallized γ-Fe2O3 powders with different crystallization extent and different particle sizes. When the pH of the reaction suspension was increased, the reaction time was prolonged, and the reaction temperature was increased, the γ-Fe2O3 powders underwent superior crystallization and had larger particle sizes. All the obtained γ-Fe2O3 powders had significant photocatalytic activities under both UV and visible light irradiation for Orange I degradation, and the powders with better crystallization and larger particle size had relatively lower activities for Orange I photocatalytic degradation. The one-step aqueous synthesis method presented in this paper may provide an advantageous pathway to synthesize large quantities of this important iron oxide.

show abstract

“…Acoustic cavitation derived from the high calorimetric power of a liquid can provide unusual and unique reaction-sites, which are attributed to extremely transient and small cavitation bubbles with high temperatures and high pressures. Many researchers reported that US process was capable of destroying various recalcitrant organic compounds (Lim et al, 2008;Liu et al, 2009;Ku et al, 2005). However, US alone is not generally deemed to be attractive for large-scale application because they require costly equipment and consume a high amount of energy.…”

Section: Introductionmentioning

confidence: 99%

Photosonochemical degradation of butyl-paraben: Optimization, toxicity and kinetic studies

Daghrir

Dimboukou-Mpira

Seyhi

et al. 2014

Science of The Total Environment

View full text Add to dashboard Cite

The objective of the present work is to evaluate the potential of a photosonolysis process for the degradation of butyl-paraben (BPB). After 120 min of treatment time, high removal of BPB was achieved by the photosonolysis (US/UV) process (88.0±0.65%) compared to the photochemical (UV) and the conventional ultrasonication (US) processes. Several factors such as calorimetric power, treatment time, pH and initial concentration of BPB were investigated. Using a 2(4) factorial matrix, the treatment time and the calorimetric power are the main parameters influencing the degradation rate of BPB. Subsequently, a central composite design methodology has been investigated to determine the optimal experimental parameters for BPB degradation. The US/UV process applied under optimal operating conditions (at a calorimetric power of 40 W during 120 min and under pH7) is able to oxidize around 99.2±1.4% of BPB and to record 43.3% of mineralization. During the US/UV process, BPB was mainly transformed into 1 hydroxy BPB, dihydroxy BPB, hydroquinone and 4-hydroxybenzoic acid. Microtox biotests (Vibrio fisheri) showed that the treated effluent was not toxic. The pseudo-first order kinetic model (k=0.0367 min(-1)) described very well the oxidation of BPB.

show abstract

Catalytic degradation of phenol in sonolysis by coal ash and H2O2/O3

Cited by 30 publications

References 37 publications

Steam reforming of acetic acid over coal ash supported Fe and Ni catalysts

Steam reforming of acetic acid over coal ash supported Fe and Ni catalysts

One-Step Synthesis of Spherical γ-Fe₂O₃ Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation

Photosonochemical degradation of butyl-paraben: Optimization, toxicity and kinetic studies

Contact Info

Product

Resources

About

Catalytic degradation of phenol in sonolysis by coal ash and H2O2/O3

Cited by 30 publications

References 37 publications

Steam reforming of acetic acid over coal ash supported Fe and Ni catalysts

Steam reforming of acetic acid over coal ash supported Fe and Ni catalysts

One-Step Synthesis of Spherical γ-Fe2O3 Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation

Photosonochemical degradation of butyl-paraben: Optimization, toxicity and kinetic studies

Contact Info

Product

Resources

About

One-Step Synthesis of Spherical γ-Fe₂O₃ Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation