COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Zihao Hu,Beiyang Guo,Huiqi Wu,Fang Zhu,Sridhar Komarneni,Jianfeng Ma
In this paper, MIL-101(Fe) and MoS 2 composites (MIL-101(Fe)/MoS 2 ) were synthesized using a facile solvothermal method . As a new degradation system, the synthesized composites were investigated using persulfate (PS) activation based on visible light (Vis). To establish the superiority of a heterogeneous photochemical catalysis system, the MIL-101(Fe)/MoS 2 was used as the catalyst in the presence of Na 2 S 2 O 8 with visible light irradiation. In the system mentioned, the MIL-101(Fe)/MoS 2 catalyst presented a much better catalytic ability than that of either a single photocatalysis or chemocatalysis system. The better catalytic ability suggests that the MIL-101(Fe)/MoS 2 catalyst was capable of effectively integrating photocatalysis and chemocatalysis leading to the highest degradation efficiency of 85% in 40 min with tetracycline as the target pollutant. The catalytic system MIL-101(Fe)/MoS 2 /PS/Vis degraded TC pollutant by forming species of O 2 ‾, 1 O 2 , hydroxyl radicals (•OH) and sulfate radicals (•SO 4 ‾) to degrade TC. Furthermore, the MIL-101(Fe)/MoS 2 catalyst displayed better catalytic performance compared to those materials that were previously reported, as verified by the good stability (reached 80% after three cycles) and the high TC degradation rate (85%) of the currently developed material. This system may be applicable to the degradation of TC and other challenging organic pollutants .
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·124932
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IF 7.5
Qiao Wen,Kun He,Yijie He,Xixi Shi,Shucai Li,Zaiwu Zhang,Tingli Yan,Hongzhou Zhang,Chunliang Li,Dawei Song
LiFePO 4 batteries have become a mainstream choice in the power battery market due to their high safety, long cycle life and low cost. Consequently, a large number of LiFePO 4 batteries will be retired as their lifespan ends, and disassembled to LiFePO 4 black powder. To address those issues such as low-value and environmental pollution during the traditional chemical recycling of spent LiFePO 4 black powder, a novel black powder recycling method is developed in this work. Firstly, this method achieves the direct recovery of P and Fe elements through Na 2 S 2 O 8 leaching, producing battery-grade FePO 4 without further purification. Then, this method achieves the low-cost recovery of Li element through furnace gas (containing CO 2 ) precipitating lithium, producing battery-grade Li 2 CO 3 , thereby combining environmental and economic benefits. Furthermore, the recycled Li 2 CO 3 and FePO 4 are used to directly re-synthesize LiFePO 4 . Comprehensive testing confirmed that the performance of the re-synthesized LiFePO 4 is comparable to that of commercial products. This method opens up a promising pathway for the sustainable and commercially viable recycling of spent LiFePO 4 black powder.
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
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2020
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IF 3.421
Hongyuan Xi,Song Zhou,Zhao Zhang
Nitric oxide and sulfur dioxide from the exhaust gases of marine diesel engines are harmful for the environment and human health. Environmentally friendly sodium persulfate, which satisfies the requirements of ships and navigation, was used as the main absorbent for the simultaneous removal of SO2 and NO in a self-designed bubble column reactor with an industrial gas distributor in this work. The focus of this work was the absorption of the insoluble NO. The influences of various parameters including the reaction temperature, Na2S2O8 concentration, NO concentration, pH value of the solution, and presence of coexisting gases on NO absorption were comprehensively and systematically studied according to the different working conditions of marine diesel engines. Furthermore, experiments for simultaneously removing SO2 and NO were conducted. Different from the previous studies, the new experimental results showed that the increase of NO concentration and the pH value of 12 were not conducive to the NO absorption; the highest removal efficiency of NO was at pH of 9; the existence of sulfur dioxide weakened the absorption of nitric oxide; the final products of the simultaneous absorption were sulfate and nitrate according to the product detection results. However, the SO2 and NO in simulated exhaust gases (900 ppm SO2, 1000 ppm NO, 15% O2 and 5% CO2) from marine diesel engines were completely absorbed under nonoptimal conditions (at 70 °C and in a 0.15 mol/L sodium persulfate solution), which indicated that sodium persulfate is promising for use in wet emission control technologies for marine diesel engines.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2017
·Vol. 8
·期 1
·1-7
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IF 12.124
Lin Jin,Li Zhi,Kan Jian,Huang Shijun,Su Weiping,Li Yadong
Catalytic oxidative C–H bond functionalization reactions that proceed without requiring stoichiometric amounts of external oxidants or pre-functionalized oxidizing reagents could maximize the atom- and step-economy in chemical syntheses. However, such a transformation remains elusive. Here, we report that a photo-driven catalytic process enables decarboxylative C–H trifluoromethylation of (hetero)arenes with trifluoroacetic acid as a trifluoromethyl source in good yields in the presence of an external oxidant in far lower than stoichiometric amounts (for example, 0.2 equivalents of Na 2 S 2 O 8 ) using Rh-modified TiO 2 nanoparticles as a photocatalyst, in which H 2 release is an important driving force for the reaction. Our findings not only provide an approach to accessing valuable decarboxylative C–H trifluoromethylations via activation of abundant but inert trifluoroacetic acid towards oxidative decarboxylation and trifluoromethyl radical formation, but also demonstrate that a photo-driven catalytic process is a promising way to achieve external oxidant-free C–H functionalization reactions.
研究领域:
有机化学
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催化
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光化学
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产品关联
DOI
PubMed
高影响因子
WATER AND ENVIRONMENT JOURNAL
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2022
·Vol. 37
·期 2
·316-325
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IF 1.977
Bo Xing,Chaoting Fu,Guo Yang,Xiang Song,Xingyong Liu,Xiaonan Liu,Qiang Zhou,Zhongcai Pan,Junjie You,Yuling Ye
N,S-codoped mesoporous carbon (S/NMC) as an effective catalyst toward the catalytic persulfate oxidation of sulfamethazine (SMZ) was fabricated conveniently using vinasse as the C/N source, Na 2 S as the S precursor and nano-SiO 2 as the template, respectively. The effect of S precursor dosage on the textural properties and surface chemistry of S/NMCs were characterized by N 2 adsorption/desorption, Raman spectra, X-ray diffractometer (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). It was found that more S precursor dosage presented an enhanced SMZ degradation performance due to the significant role of more S precursor dosage: (i) larger specific surface area and (ii) more active surface groups including pyridine N, graphite N, quinone-like O and thiophene-like S. In addition, quenching experiments showed that free radical and nonradical oxidation processes are the main processes of SMZ degradation. The findings provided a new idea for the resource utilization of vinasse and the development of catalytic persulfate oxidation of organic pollution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）