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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH · 2017 · IF 2.843

Fe(III)-Modified BiOBr Hierarchitectures for Improved Photocatalytic Benzyl Alcohol Oxidation and Organic Pollutants Degradation

Mengqian Yuan,Fan Tian,Guangfang Li,Huiping Zhao,Yunling Liu,Rong Chen

In this work, hierarchical nanostructures Fe(III)-modified BiOBr were successfully prepared via a facile one-step route at room temperature. Compared with pure BiOBr, Fe(III)-modified BiOBr samples possess enhanced photocatalytic abilities for benzyl alcohol oxidation and organic dye degradation in the presence of H2O2 upon light illumination. The improved photocatalytic oxidation and degradation ability of Fe(III)-modified BiOBr is ascribed to the enhanced photogenerated carriers separation efficiency and promoted production of ·OH due to the generation of Fe2+ ions via interfacial charge transfer from Fe3+ ions. This work provides a facial approach to improve photocatalytic efficiency for organic synthesis and environmental remediation.

CAS / MDL: 10035-06-0 7220-79-3 61-73-4 7758-02-3 81-88-9

研究领域: 材料科学 · 环境科学 · 化学

✓ 已验证产品关联 DOI 高影响因子

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JOURNAL OF HAZARDOUS MATERIALS · 2022 · IF 14.224

Enhanced transformation capability towards benzo(a)pyrene by Fe(III)-modified manganese oxides

Pengfei Cheng,Zhipeng Lin,Xuqiang Zhao,Michael Gatheru Waigi,Galina K. Vasilyeva,Yanzheng Gao

Manganese oxides (Mn oxides) are ubiquitous and may coexist with Fe(III) ions in soil environments. In this study, acid birnessite , alkaline birnessite, cryptomelane, pyrolusite, manganite , and their Fe(III)-modified analogues were synthesized and used for benzo(a)pyrene transformation. Fe-modified Mn oxides show a markedly enhanced transformation capability towards benzo(a)pyrene. Specifically, the benzo(a)pyrene transformation rate constants k for Bir-H, Bir-OH, Cry, Pyr, and Man were 0.49, 0.080, 0.0071, 0.0055, and 0.0022 h −1 , respectively. After Fe(III) modification, the transformation rate constants were increased to 22, 2.7, 0.25, 0.0072 and 0.0098 h −1 , respectively. Fe(III)-modified layered birnessites exhibited better activity than Fe(III)-modified tunnel Mn oxides, which was attributed to their high Fe(III) contents and abundant active free radicals. Fe(III) was found to accept electrons from benzo(a)pyrene, thereby accelerating the benzo(a)pyrene transformation. Moreover, modification with Fe(III) increased the surface adsorbed water and oxygen, and promoted the generation of active free radicals. Finally, the physicochemical and biochemical properties of transformation products showed the environmental benefits of this process. Overall, the results indicate that the occurrence of Fe(III) ions could promote the removal of PAHs in Mn oxides-rich soils, and this study provides a credible understanding of PAH fates in natural soils.

CAS / MDL: 50-32-8

研究领域: 环境科学 · 土壤化学 · 污染物转化

✓ 已验证产品关联 DOI PubMed 高影响因子

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Fe(III)-Modified BiOBr Hierarchitectures for Improved Photocatalytic Benzyl Alcohol Oxidation and Organic Pollutants Degradation

Enhanced transformation capability towards benzo(a)pyrene by Fe(III)-modified manganese oxides