The Experts below are selected from a list of 62631 Experts worldwide ranked by ideXlab platform
Weihua Wang - One of the best experts on this subject based on the ideXlab platform.
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making fe si b amorphous powders as an effective catalyst for dye degradation by high Energy ultrasonic vibration
2020Co-Authors: Yuqiang Yan, Junqiang Wang, Chenchen Yuan, Bo Huang, Can Yang, Lishan Huo, Zhiqiang Cui, Xunli Wang, Weihua WangAbstract:Abstract Synthetic dyes have caused serious ecological and environmental threats in our daily lives. Effective and inexpensive dye-degradation methods are desperately perused for decades. In this work, ultrasonic-vibration treatment is found as an effective approach that can dramatically improve the degradation performance of industrial Fe78Si9B13 amorphous powders towards methylene blue. As demonstrated by synchrotron X-ray nano-computed tomography and scanning electron microscope combined with X-ray photoelectron spectroscopy, the micro-channels on the surface or inside of Fe78Si9B13 particles offer a shortcut for fast mass transfer and supply plenty of reactive sites with low density and high Energy due to the structural rejuvenation after ultrasonic vibration. It leads to the reduction of the Reaction Activation Energy of degradation under the pseudo-first-order kinetic model and an exceptional decomposition capacity. Our work not only extremely drives down the current costs of wastewater treatments, but also provides a promising approach for tuning the effectivity of alloying catalysts via manipulating the potential Energy state of metallic glasses based on the high-frequency mechanical vibration technique.
Chenchen Yuan - One of the best experts on this subject based on the ideXlab platform.
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making fe si b amorphous powders as an effective catalyst for dye degradation by high Energy ultrasonic vibration
2020Co-Authors: Yuqiang Yan, Junqiang Wang, Chenchen Yuan, Bo Huang, Can Yang, Lishan Huo, Zhiqiang Cui, Xunli Wang, Weihua WangAbstract:Abstract Synthetic dyes have caused serious ecological and environmental threats in our daily lives. Effective and inexpensive dye-degradation methods are desperately perused for decades. In this work, ultrasonic-vibration treatment is found as an effective approach that can dramatically improve the degradation performance of industrial Fe78Si9B13 amorphous powders towards methylene blue. As demonstrated by synchrotron X-ray nano-computed tomography and scanning electron microscope combined with X-ray photoelectron spectroscopy, the micro-channels on the surface or inside of Fe78Si9B13 particles offer a shortcut for fast mass transfer and supply plenty of reactive sites with low density and high Energy due to the structural rejuvenation after ultrasonic vibration. It leads to the reduction of the Reaction Activation Energy of degradation under the pseudo-first-order kinetic model and an exceptional decomposition capacity. Our work not only extremely drives down the current costs of wastewater treatments, but also provides a promising approach for tuning the effectivity of alloying catalysts via manipulating the potential Energy state of metallic glasses based on the high-frequency mechanical vibration technique.
Junqiang Wang - One of the best experts on this subject based on the ideXlab platform.
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making fe si b amorphous powders as an effective catalyst for dye degradation by high Energy ultrasonic vibration
2020Co-Authors: Yuqiang Yan, Junqiang Wang, Chenchen Yuan, Bo Huang, Can Yang, Lishan Huo, Zhiqiang Cui, Xunli Wang, Weihua WangAbstract:Abstract Synthetic dyes have caused serious ecological and environmental threats in our daily lives. Effective and inexpensive dye-degradation methods are desperately perused for decades. In this work, ultrasonic-vibration treatment is found as an effective approach that can dramatically improve the degradation performance of industrial Fe78Si9B13 amorphous powders towards methylene blue. As demonstrated by synchrotron X-ray nano-computed tomography and scanning electron microscope combined with X-ray photoelectron spectroscopy, the micro-channels on the surface or inside of Fe78Si9B13 particles offer a shortcut for fast mass transfer and supply plenty of reactive sites with low density and high Energy due to the structural rejuvenation after ultrasonic vibration. It leads to the reduction of the Reaction Activation Energy of degradation under the pseudo-first-order kinetic model and an exceptional decomposition capacity. Our work not only extremely drives down the current costs of wastewater treatments, but also provides a promising approach for tuning the effectivity of alloying catalysts via manipulating the potential Energy state of metallic glasses based on the high-frequency mechanical vibration technique.
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fast decolorization of azo dyes in both alkaline and acidic solutions by al based metallic glasses
2017Co-Authors: Peipei Wang, Junqiang Wang, Hao Yang, Juntao Huo, J G Wang, Chuntao Chang, Xinmin Wang, Gang WangAbstract:Abstract The advanced efficiency of metallic glasses in degrading organic water pollutants has attracted wide interests. Yet the decolorization efficiency decreases in alkaline solutions which remains a challenge for their application. In this work, the performance of Al 91-x Ni 9 Y x (x = 0, 3, 6, 9 at.%) metallic ribbons in degrading azo dye in aqueous solutions at wide pH conditions is studied. It is surprising to find that the Reaction activity of Al-based metallic glass in alkaline and acidic azo dye solution is about 1.5 and 189 times higher than that in neutral solutions, respectively. The low Reaction Activation Energy and formation of nano-porosity on the surface of metallic glass are responsible for the high reactivity in alkaline and acidic solutions. The Reaction activity can be further enhanced by modifying the alloy composition. These findings suggest that the Al-based metallic glasses hold promising potential in degrading azo dyes solutions, especially in alkaline and acidic environments.
Yuqiang Yan - One of the best experts on this subject based on the ideXlab platform.
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making fe si b amorphous powders as an effective catalyst for dye degradation by high Energy ultrasonic vibration
2020Co-Authors: Yuqiang Yan, Junqiang Wang, Chenchen Yuan, Bo Huang, Can Yang, Lishan Huo, Zhiqiang Cui, Xunli Wang, Weihua WangAbstract:Abstract Synthetic dyes have caused serious ecological and environmental threats in our daily lives. Effective and inexpensive dye-degradation methods are desperately perused for decades. In this work, ultrasonic-vibration treatment is found as an effective approach that can dramatically improve the degradation performance of industrial Fe78Si9B13 amorphous powders towards methylene blue. As demonstrated by synchrotron X-ray nano-computed tomography and scanning electron microscope combined with X-ray photoelectron spectroscopy, the micro-channels on the surface or inside of Fe78Si9B13 particles offer a shortcut for fast mass transfer and supply plenty of reactive sites with low density and high Energy due to the structural rejuvenation after ultrasonic vibration. It leads to the reduction of the Reaction Activation Energy of degradation under the pseudo-first-order kinetic model and an exceptional decomposition capacity. Our work not only extremely drives down the current costs of wastewater treatments, but also provides a promising approach for tuning the effectivity of alloying catalysts via manipulating the potential Energy state of metallic glasses based on the high-frequency mechanical vibration technique.
Hongye Lin - One of the best experts on this subject based on the ideXlab platform.
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a semi continuous process for the synthesis of methyl carbamate from urea and methanol
2004Co-Authors: Jianjun Sun, Bolun Yang, Hongye LinAbstract:A semicontinuous process for the synthesis of methyl carbamate from urea and methanol was investigated in the autoclave without the catalyst. Some significant parameters were determined in terms of the methyl carbamate yield. The optimal Reaction conditions were found at an initial molar ratio of methanol/urea of 6:1, a Reaction temperature of 423 K, a flow rate of fresh methanol at 4 mL/min, a stirring speed of 800 rpm and a Reaction time of 6 hours, respectively. A MC yield of 98.7 % was obtained at the optimal Reaction conditions. Furthermore, the kinetics of this Reaction were researched and the Reaction Activation Energy was obtained as 110.498 kJ/mol. It was demonstrated that removing methanol containing ammonia from the autoclave and replacing it with continuously feeding fresh methanol resulted in a higher Reaction rate and a high MC yield.
