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首页> 外文期刊>Clean >Photocatalytic Degradation of the Azo Dye AcidRed 14 in Nanosized TiO_2 Suspension underSimulated Solar Light
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Photocatalytic Degradation of the Azo Dye AcidRed 14 in Nanosized TiO_2 Suspension underSimulated Solar Light

机译：模拟太阳光下纳米TiO_2悬浮液中偶氮染料酸性红14的光催化降解

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摘要

The degradation and mineralization of azo dye acid red 14 by Titanium dioxide (TiO2) photocatalysis under simulated solar light was studied at lab scale. The characteristics (such as phase features, specific surface area, bandgap energy, etc.) of nanosized TiO2 were investigated in detail. The color removal rate, decrease rate of total organic carbon, and production rate of sulfate ions in aqueous solution were determined. Acid red 14 could be decolorized and mineralized efficiently with nanosized TiO2 under simulated solar light. Acidic or neutral conditions were beneficial to the decolorization of acid red 14 aqueous solutions. Acid red 14 was nearly 100% mineralized after 60 min irradiation by simulated solar light under certain experimental conditions. The photocatalytic degradation efficiency increased with increasing the irradiation intensity of solar simulated light. TiO2 dosage, pH value of aqueous solution, and initial concentration of acid red 14, had significant influences on the decolorization efficiency. It is feasible to use photocatalysis with nanosized TiO2 under simulated solar light to efficiently degrade and mineralize acid red 14. The high photocatalytic efficiency of TiO2 under simulated solar light might be related to its lower bandgap energy and the relatively higher fraction of anatase phase.
机译：在实验室规模下研究了二氧化钛（TiO2）光催化下偶氮染料酸性红14的降解和矿化作用。详细研究了纳米TiO2的特性（如相特征，比表面积，带隙能等）。测定了脱色率，总有机碳的减少率和水溶液中硫酸根离子的产生率。酸性红14可以在模拟太阳光下用纳米TiO2有效地脱色和矿化。酸性或中性条件有利于酸性红14水溶液的脱色。在某些实验条件下，模拟太阳光照射60分钟后，酸性红14几乎矿化了100％。随着太阳模拟光的照射强度的增加，光催化降解效率增加。 TiO2的用量，水溶液的pH值和酸性红14的初始浓度对脱色效率有显着影响。在模拟太阳光下使用纳米级TiO2进行光催化以有效降解和矿化酸性红14是可行的。在模拟太阳光下TiO2的高光催化效率可能与其较低的带隙能和相对较高的锐钛矿相份额有关。

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  • 来源
    《Clean》 |2015年第7期|1037-1043|共7页
  • 作者

    Jing Miao; Hai-Bo Lu; Daryoush Habibi; Mehdi H. Khiadani; Lai-Chang Zhang;

  • 作者单位

    School of Engineering, Edith Cowan University, Joondalup, Perth, Australia;

    School of Mechanical and Chemical Engineering, The University of Western Australia, Perth, Australia;

    School of Engineering, Edith Cowan University, Joondalup, Perth, Australia;

    School of Engineering, Edith Cowan University, Joondalup, Perth, Australia;

    School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Azo dye; Degradation efficiency; Mineralization; Photocatalysis; Wastewater treatment;

    机译：偶氮染料;降解效率;矿化;光催化;废水处理;

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