Key structural features that determine the selectivity of UV/acetylacetone for the degradation of aromatic pollutants when compared to UV/H2O2

Zhang, Guoyang; Xie, Min; Zhao, Jing; Wei, Shuangshuang; Zheng, Hongcen; Zhang, Shujuan

doi:10.1016/j.watres.2021.117046

Cited by 41 publications

(18 citation statements)

References 54 publications

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“…张国洋等: 双酮基光化学高级氧化/还原技术：分子机制解析及研究进展图 6 (a) 高级氧化/还原技术体系中相关的自由基以及氧化剂的还原电位天梯图(E 0 vs. NHE) [57] ; (b) UV/双酮体系中有机自由基(直接裂解以及氧合、水合后的自由基)的理论氧化还原电位(E 0 vs. NHE), 计算方法引自文献 [58] (网络版彩图) Figure 6 (a) Redox ladder of redox couples (E 0 vs. NHE) in the advanced oxidation/reduction technology (AOTs) [57] ; (b) One electron standard reduction potential (E 0 vs. NHE) of the organic free radicals in UV/diketone system. The calculation method was cited from the literature [58] (color online) 值得一提的是, 虽然传统氧化剂(O3、H2O2、Cl2 [61] .…”

Section: 在紫外光辐照下 Bdmentioning

confidence: 99%

“…曝 N2、N2O 或者将溶剂更换为重水对 UV/AA 法脱色效率的影响也很有限, 说明光致产生的活性氧物种并不是 UV/AA 法的主要作用物种 [15,22] . 通过量化计算发现, AA 的三重激发态 3 (AA) * 能够与偶氮、三芳甲烷类染料进行自发的电子或能量转移 [22,58] . [20] (网络版彩图) Figure 10 Two mechanisms of the Cr(VI) reduction with UV/AA process: carbon-center radical pathway and complexation pathway [20] (Reproduced with permission.…”

Section: 在紫外光辐照下 Bdunclassified

“…AA 在水相中的吸收主要来源于烯醇式结构的 S0→S2(ππ*)跃迁. 通过对 AA 的光子吸收速率和染料脱色的准一级降解速率常数(k1 值)进行相关分析, 发现羟基偶氮、氨基偶氮、磺酞、呫吨、三芳甲烷等染料降解的 k1 值与 AA 对光子的吸收呈现显著正相关性 [58] . 这些结果证实了含质子的烯醇式 AA 是主要的光活化剂.…”

Section: Uv/双酮体系中的关键结构unclassified

“…[AA] = [H2O2] = 0.5 mmol/L; light intensity: 3.9 mW/cm 2 (365 nm) [85] (color online) 除了良好的抗基质干扰能力, UV/AA 法也展现出了底物结构和官能团的选择性. Zhang 等 [58] [58] .…”

Section: 一般而言推电子基团抑制羰基水合降低烯醇unclassified

“…UV/AA 法的降解, 而强吸电子基团-NO2 以及具有位阻效应的-SO3 -基团的存在显著抑制 UV/AA 法的作用效果 [58] . 这种官能团选择性可能与激基复合物的形成机制以及内部电子转移过程有关.…”

Section: 染料分子的共轭结构中存在给电子基团-Oh 有利于unclassified

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Diketone and UV based advanced oxidation/reduction technologies: molecular mechanisms and research advances

Zhang¹,

Wu²,

Zhang³

et al. 2021

Sci. Sin.-Chim

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The practical application of most of the UV-based advanced oxidation/reduction technologies (AOTs) is still limited because of the poor selectivity of the reactive species in the UV-based AOTs and the inner filter effects caused by the complicated components in real waters. Recently, new photochemical techniques based on low molecular weight diketones have attracted much attention because of the higher selectivity and the stronger anti-interference ability. This review summarizes the current research progress on diketone-mediated photochemical processes, with emphasis on the role of the enol tautomer in electron/energy transfer. The characteristics of UV/diketone and its potential applications in water pollution control are preliminarily discussed. Moreover, the remaining questions in the current research on UV/diketones are analyzed, and the future research directions are proposed.

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Section: 在紫外光辐照下 Bdmentioning

confidence: 99%

Section: 在紫外光辐照下 Bdunclassified

Section: Uv/双酮体系中的关键结构unclassified

Section: 一般而言推电子基团抑制羰基水合降低烯醇unclassified

Section: 染料分子的共轭结构中存在给电子基团-Oh 有利于unclassified

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Diketone and UV based advanced oxidation/reduction technologies: molecular mechanisms and research advances

Zhang¹,

Wu²,

Zhang³

et al. 2021

Sci. Sin.-Chim

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Fabrication of Ag₂MoO₄/CuWO₄ Nanocomposite Photocatalyst for the Degradation of Rhodamine‐B

Jatav,

Kumar,

Shrivastava

et al. 2024

ChemistrySelect

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Herein, we investigate the photocatalytic properties of a new Ag2MoO4/CuWO4 composite. Three different composites with 5, 10, and 15 weight percent of fine Ag2MoO4 nanostructures were precipitated on CuWO4 nanoparticles. Given the staggered valence and conduction band positions of the two components, the composite with the 10 % weight percent Ag2MoO4 loading on CuWO4 demonstrated the slowest recombination kinetics. The same composite also exhibited the best photocatalytic degradation of RhB under UV light irradiation. The photocatalytic turnover frequency of this composite was also among the best reported for RhB degradation reported in the literature. Photocatalytic kinetics, active species trapping, and various control experiments were carried out to get an insight into the photocatalytic mechanism. The optimum photocatalyst exhibited its highest activity at pH 3 and a RhB degradation turnover frequency (photocatalytic activity) comparable to the best values reported in the literature.

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UV- and US-Based Oxidation of a Triazine Azo Dye (Reactive Red 120): Operational Parameters, Kinetics, Water Matrix Effect, Predominant Radicals, and Energy Efficiency

Baştürk

2023

Arab J Sci Eng

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Key structural features that determine the selectivity of UV/acetylacetone for the degradation of aromatic pollutants when compared to UV/H2O2

Cited by 41 publications

References 54 publications

Diketone and UV based advanced oxidation/reduction technologies: molecular mechanisms and research advances

Diketone and UV based advanced oxidation/reduction technologies: molecular mechanisms and research advances

Fabrication of Ag₂MoO₄/CuWO₄ Nanocomposite Photocatalyst for the Degradation of Rhodamine‐B

UV- and US-Based Oxidation of a Triazine Azo Dye (Reactive Red 120): Operational Parameters, Kinetics, Water Matrix Effect, Predominant Radicals, and Energy Efficiency

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Key structural features that determine the selectivity of UV/acetylacetone for the degradation of aromatic pollutants when compared to UV/H2O2

Cited by 41 publications

References 54 publications

Diketone and UV based advanced oxidation/reduction technologies: molecular mechanisms and research advances

Diketone and UV based advanced oxidation/reduction technologies: molecular mechanisms and research advances

Fabrication of Ag2MoO4/CuWO4 Nanocomposite Photocatalyst for the Degradation of Rhodamine‐B

UV- and US-Based Oxidation of a Triazine Azo Dye (Reactive Red 120): Operational Parameters, Kinetics, Water Matrix Effect, Predominant Radicals, and Energy Efficiency

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Product

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Fabrication of Ag₂MoO₄/CuWO₄ Nanocomposite Photocatalyst for the Degradation of Rhodamine‐B