Photoelectrocatalytic degradation of rhodamine B using Ti/TiO2 electrode prepared by laser calcination method

Li, Jiaqing; Li, Luoping; Zheng, Lei; Xian, Yuezhong; Jin, Litong

doi:10.1016/j.electacta.2006.01.037

Cited by 79 publications

(36 citation statements)

References 36 publications

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“…6(a), Aerogel B exhibits the best adsorption capacity by removing 95% adsorbate within 1 h. This removal capacity is simi- lar to other popular catalytic degradation methods for RhB removal [20][21]. The highly porous structure and the affinity between the hydrophilic surface of Aerogel B and the RhB molecule were the primary reasons for the high adsorption effectiveness.…”

Section: Adsorption Curves Of Rhb and Dieldrinmentioning

confidence: 77%

Preparation and characterization of a novel silica aerogel as adsorbent for toxic organic compounds

Liu

Sha

Cooper

et al. 2009

Colloids and Surfaces A: Physicochemical and Engineering Aspect

108

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a b s t r a c tHydrophobic and hydrophilic silica aerogels were prepared from cheap waterglass precursors via surface modification of wet gels, ambient pressure drying (APD) route and calcination treatment. Xerogel was also synthesized as a comparison to test the influence of microstructure on the adsorption behaviours. Ethanol (EtOH)/chlorotrimethylsilane (TMCS)/hexane solution was employed to replace the surface silanol groups (Si OH) with alkyl, and to prevent the condensation and shrinkage of the gel structure during the APD process. The synthesized silica aerogels, characterized by using Fourier transform infrared spectra (FTIR), nitrogen adsorption/desorption measurement, element analyses and differential scanning calorimeter (DSC), etc., are porous and translucent solids with surface area of 546-907 m 2 /g. The transition temperature from hydrophobic to hydrophilic was tested around 395 • C, which corresponds to the disappearance temperature of the CH 3 peaks in FTIR. The materials were tested for adsorption capacities on rhodamine B (RhB) and dieldrin, which represented soluble and slightly soluble organic compounds, respectively. Results showed that the hydrophobic silica aerogel exhibited strong adsorption capacity on slightly soluble organic compounds while hydrophilic silica aerogel was much more effective on adsorbing soluble compounds from aqueous solution. Adsorption properties of the silica aerogel remain stable after 5 adsorption/desorption cycles.

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Section: Adsorption Curves Of Rhb and Dieldrinmentioning

confidence: 77%

Preparation and characterization of a novel silica aerogel as adsorbent for toxic organic compounds

Liu

Sha

Cooper

et al. 2009

Colloids and Surfaces A: Physicochemical and Engineering Aspect

108

View full text Add to dashboard Cite

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“…Figure 5b depicted that under UV illumination, the photocurrent at Ti/TiO 2 electrode initially increased with potential bias and then reached saturation gradually above the potential of 0.8 V. This was because the transportation and production of photogenerated electrons reached equilibrium [22,24].…”

Section: Resultsmentioning

confidence: 99%

“…The operation of coating and drying was repeated three times. The above rod was scanned by using a 1.5 mm diameter laser beam for 30 min [22]. After that, the rod electrode was modified in 1.0 mol L À1 HClO 4 solution containing 0.01 mol L À1 Pb(NO 3 ) 2 as our paper [19] studied earlier.…”

Section: Ti/tio 2 /Pbo 2 Film Preparationmentioning

confidence: 99%

Photoelectro‐Synergistic Catalysis at Ti/TiO₂/PbO₂ Electrode and Its Application on Determination of Chemical Oxygen Demand

Zheng

et al. 2006

Electroanalysis

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In this paper, photoelectro-synergistic catalysis oxidation of organics in water on Ti/TiO 2 /PbO 2 electrode was investigated by the method of electrochemistry. Furthermore, the results were compared with those obtained from photocatalysis and electrocatalysis. The method proposed was applied to determine the chemical oxygen demand (COD) value, Ti/TiO 2 /PbO 2 electrode functioning as the work electrode during the process. It was shown that the method of photoelectro-synergistic catalysis had lower detection limit and wider linear range than the methods of electroassisted photocatalysis and electrocatalysis. The results obtained by the proposed method and conventional one were compared by carrying out the experiment on 8 wastewater samples. The correlation of the results using different methods was satisfactory and the relative bias was below AE 6.0%.

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“…This coincides with the preferential adsorption of PVP on {111} planes. In recent years, many researchers have paid attention to photoelectrocatalytic mechanisms for the degradation of the organic pollutants [30][31][32][33][34][35], fundamentally aiming to enhance photogenerated electron/hole separation by application of a potential bias. More importantly, in the photoelectrocatalytic system, by an applied potential bias, the formation of radicals can be controlled on the electrodes.…”

Section: Photoelectrocatalytic Degradation Of 2-cpmentioning

confidence: 99%

The effect of different exposed facets on the photoelectrocatalytic degradation of o-chlorophenol using p-type Cu 2 O crystals

Sang

Zhang

Lan

et al. 2017

Electrochimica Acta

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A B S T R A C TAlthough it is known that the efficacy of photoelectrocatalysts is enhanced by increasing the amount of high energy surface exposed, the development of a universal synthesis method with both superior activity and simplicity is needed for scalable applications. We herein controllably fabricated cuprous oxide (Cu 2 O) micro crystals with different morphologies, evolving from cubes, cuboctahedra, truncated octahedra and finally to octahedra on indium tin oxide (ITO) glass substrates, by a facile electrochemical deposition method. The structures of facet-engineered Cu 2 O samples and the underlying mechanism for the morphology evolution were investigated. The separation of photogenerated hole-electron pairs on Cu 2 O crystals with different exposed facets was characterized by measuring the photocurrent densities with chopped illumination, which increased with the increased concentrations of PVP: the octahedral Cu 2 O crystals, with the highest proportion of {111} facets exposed, exhibited the lowest electro-hole recombination in contrast to the cubes, cuboctahedra, and truncated octahedra, respectively. The photoelectrocatalytic degradation efficiency of the o-chlorophenol (2-CP) pollutant under sunlight irradiation with Cu 2 O-coated photocathode was further investigated to reveal the effect of different exposed facets. Due to the increased number of surface active sites available for degradation reactions, the octahedral Cu 2 O microcrystals presented higher photoelectrocatalytic activity compared to other shapes. Active oxygen species detected by electron spin-resonance (ESR) spectrometry implied that abundant superoxide radicals (O 2 *À ) were the dominant active radicals in the degradation.

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Photoelectrocatalytic degradation of rhodamine B using Ti/TiO2 electrode prepared by laser calcination method

Cited by 79 publications

References 36 publications

Preparation and characterization of a novel silica aerogel as adsorbent for toxic organic compounds

Preparation and characterization of a novel silica aerogel as adsorbent for toxic organic compounds

Photoelectro‐Synergistic Catalysis at Ti/TiO₂/PbO₂ Electrode and Its Application on Determination of Chemical Oxygen Demand

The effect of different exposed facets on the photoelectrocatalytic degradation of o-chlorophenol using p-type Cu 2 O crystals

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Photoelectrocatalytic degradation of rhodamine B using Ti/TiO2 electrode prepared by laser calcination method

Cited by 79 publications

References 36 publications

Preparation and characterization of a novel silica aerogel as adsorbent for toxic organic compounds

Preparation and characterization of a novel silica aerogel as adsorbent for toxic organic compounds

Photoelectro‐Synergistic Catalysis at Ti/TiO2/PbO2 Electrode and Its Application on Determination of Chemical Oxygen Demand

The effect of different exposed facets on the photoelectrocatalytic degradation of o-chlorophenol using p-type Cu 2 O crystals

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Photoelectro‐Synergistic Catalysis at Ti/TiO₂/PbO₂ Electrode and Its Application on Determination of Chemical Oxygen Demand