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| 1 | Synergistic effect of various elements in Fe_(41)Co_(7)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2) amorphous alloy hollow ball on catalytic degradation of methylene blue显示文摘Metallic glasses have recently attracted great attention in terms of degrading dyes and other organic pollutants as an environmentally friendly material for wastewater remediation.Herein,we report a new type of amorphous catalyst Fe_(41)Co_(7)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2) hollow balls.Results demonstrate that the catalyst can still completely decolorize the 20 mg/L methylene blue(MB)solution after reused for 50 times under conditions of pH=5,catalyst content 0.5 g/L,and temperature 80°C.The catalyst is easily broken during degradation,so the inner surface also provides additional active sites.The Fe_(41)Co_(7)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2) amorphous alloy hollow balls were characterized by energy dispersive X-ray specroscopy(EDS),scanning electron microscopy(SEM)and X-ray photoelectron spectroscopy(XPS),respectively.The elements in the catalytic system have a synergistic catalytic effect.Redox cycle Fe^(2+)/Fe^(3+),Co^(2+)/Co^(3+)and Mo^(4+)/Mo^(6+) promote mutual conversion and accelerate the catalytic process of their reaction with H_(2)O_(2),forming a self-stable redox cycle process.Among them,Fe^(2+)promotes the conversion of Co^(3+)to Co^(2+),and Mo^(4+) promotes the conversion of Fe^(3+)to Fe^(2+),mainly Fe^(2+)and Co^(2+)react with H_(2)O_(2) to generate•OH.Mo and Cr elements form MoO_(2) and Cr_(2)O_(3) plasma compounds on the surface,which act as a protective film to make the catalyst more stable and be repeated used more frequently. | Wenhu Luo Qingjun Chen Li Ji Xinyuan Peng Guosheng Huang | 2022 | Journal of Rare Earths2022，40，4： | 1 |
| 2 | Cu基非晶合金活化过硫酸钠降解酸性橙显示文摘采用高级氧化法,以Cu_(46)Zr_(44.5)Al_(7.5)Y_(2)非晶合金为催化剂活化过硫酸钠(PS)降解水中的酸性橙,考察了溶液初始pH值、Cu_(46)Zr_(44.5)Al_(7.5)Y_(2)非晶合金用量、PS初始浓度、温度对降解的影响,以及重复使用过程中的稳定性.结果表明,Cu_(46)Zr_(44.5)Al_(7.5)Y_(2)非晶合金活化过硫酸钠可以显著地降解水中酸性橙,在初始pH值为5,Cu_(46)Zr_(44.5)Al_(7.5)Y_(2)非晶合金用量为0.5 g/L,PS初始浓度为0.5 mmol/L,温度为25℃的最佳条件下反应50 min,酸性橙的降解率能够达到91.2%,并且Cu_(46)Zr_(44.5)Al_(7.5)Y_(2)非晶合金在重复使用10次后的降解率仍能达到85.3%. | 马林林 祝金民 刘钰龙 高美玉 李正坤 | 2021 | 材料与冶金学报2021，20，2： | 0 |
| 3 | An efficient CuZr-based metallic glasses electrode material for electrocatalytic degradation of azo dyes显示文摘Metallic glasses have received a lot of attention on wastewater treatment due to their unique atomic structure,and the use of metallic glasses as electrodes has produced unexpected electrocatalytic degradation effects for many pollutants through combining with electrochemical technology.However,it still is a formidable challenge to find a metallic glass electrode material with both efficient and clean for the catalytic degradation of pollutants.In this work,the Cu_(55)Zr_(45)metallic glassy ribbons are used as an electrode to degrade azo dyes and show the excellent degradation effect,which can reach 95.6%within 40 min.In the degradation process,almost no additives are produced and Cu_(55)Zr_(45)metallic glassy ribbons have excellent effects under different pH conditions.Meanwhile,it exhibits good stability for degradation efficiency during the 8 cycle degradation tests of the amorphous alloy electrode.When the copper nanoparticles are exposed on the surface of the ribbons,the oxidized copper obtained synergistically produce activated radicals is the primary degradation mechanism,where the auxiliary degradation mechanisms include electron transfer and the promotion of active chlorine.This research develops a new type of electrode material for wastewater treatment,and the economy and high efficiency of Cu55Zr45metallic glass endow it the expandable functional applications. | Zhiwang Deng Bowen Zhao Songtao Li Zhengkun Li Shiming Zhang Kewei Zhang Zhengwang Zhu | 2024 | Journal of Environmental Sciences2024，，2： | 0 |
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