Photoconversion of Phenol in Ice with the Presence of H2O2 Under Simulated Solar Light†

doi:10.7503/cjcu20150474

Abstract

Abstract:

Using simulated solar light, under the condition of low temperature(-14—-12 ℃), the photoconversion reaction of phenol was studied when H₂O₂existed in the water ice. The influence factors and the dynamics of the photoconversion of phenol in the water ice were investigated. With the increasing of the H₂O₂ initial concentration and light intensity, the photoconversion rate of phenol was increased rapidly. While the photoconversion rate decreased with the increasing of the phenol initial concentration. The photoconversion of phenol was decreased from acid conditions to alkali conditions. The photoconversion course follows the first-order kinetics equation. The photoproducts detected by GC-MS(gas chromatography-mass spectrometer) indicate that the hydroxylation reactions occurred in the photoconversion course.

Key words: Phenol, Simulated solar light, Hydrogen peroxide, Ice

CLC Number:

O644.1
X131

TrendMD:

TANG Xiaojian, WANG Yixue, KANG Chunli, LIU Hanfei, CHEN Baiyan, QIU Shilun. Photoconversion of Phenol in Ice with the Presence of H₂O₂ Under Simulated Solar Light^†[J]. Chem. J. Chinese Universities, 2015, 36(9): 1719.

Figures/Tables 7

Fig.1 Photolysis of phenol under dark and light conditions[phenol]0=0.4 mmol/L; [H2O2]0=8 mmol/L; pH=5.91; light intensity=23000 Lx.

Fig.2 Photolysis kinetic curve of phenol[phenol]0=0.4 mmol/L; [H2O2]0=8 mmol/L;pH=5.91; light intensity=23000 Lx.

Fig.3 Effects of different initial concentrations of phenolConcentrations of phenol/(mmol·L-1): a. 0.1;b. 0.4; c. 0.8; d. 1.0; e. 3.2.

Fig.4 Effects of different initial concentrations of H2O2Concentrations of H2O2/(mmol·L-1): a. 1.2; b. 4; c. 8; d. 12; e. 16.

Fig.5 Effect of pH on the photolysis of phenol

Fig.6 Effect of light intensity

Scheme 1 Photolysis mechanism of phenol

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Photoconversion of Phenol in Ice with the Presence of H₂O₂ Under Simulated Solar Light^†

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