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学者姓名：王永净
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Abstract ：
Fenton and Fenton-like reactions are common processes that usually occur during the oxidation of organic substrates. Unlike the Fe2+/H2O2 Fenton system of which the catalytic mechanisms are dominated by the production of •OH, that of FeIII Fenton-like system are to date still confusing. In this study, the activation of H2O2 was investigated by employing an FeIII based layered double hydroxide (MF-CO3) as the catalyst and phenol as the target. It reveals that the catalytic property of MF-CO3 is much superior than its counterpart of MF-Na synthesized with similar procedure. The investigation of phase structure and morphology indicate that MF-CO3 possesses higher degree of crystallinity. The results of XPS, IR measurements suggest that CO32– content in MF-CO3 is obviously higher than that in MF-Na. Furthermore, the tests of free radicals reveal that •OH and 1O2 are the main ROSs generated during the activation process with HO2•/O2•- non-detectable, which was different from the previously reported Fenton/Fenton-like system in the presence of HO2•/O2•-. CO32– assisted hemolysis of H2O2 in the catalyst is proposed herein for an in-depth understanding of the interactions between surface FeIII and H2O2. It is suggested that the oxidation of FeIII intermediate to produce ·OH is possibly one of the essential steps of activation. It is firstly reported for the positive impact of the CO32– on the activation mechanism of FeIII based catalyst. The results would give new insights for comprehending the FeIII Fenton-like process especially with the existence of CO32– which is a major inorganic species in water matrices. © 2024
Keyword ：
Catalysts Catalysts Chemical activation Chemical activation Crystallinity Crystallinity Free radicals Free radicals Infrared imaging Infrared imaging Iron compounds Iron compounds Morphology Morphology Oxidation Oxidation Phenols Phenols Reaction intermediates Reaction intermediates
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| GB/T 7714 | Wu, Shuang , Huang, Mengting , Li, Xinqin et al. Carbonate assisted activation Fe(III)-based fenton-like reagent layer double hydroxide [J]. | Separation and Purification Technology , 2024 , 346 . |
| MLA | Wu, Shuang et al. "Carbonate assisted activation Fe(III)-based fenton-like reagent layer double hydroxide" . | Separation and Purification Technology 346 (2024) . |
| APA | Wu, Shuang , Huang, Mengting , Li, Xinqin , Lin, Weibin , Lu, Zhenghao , Wang, Yongjing . Carbonate assisted activation Fe(III)-based fenton-like reagent layer double hydroxide . | Separation and Purification Technology , 2024 , 346 . |
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随着锂离子电池(LIBs)需求量的急剧增长,必将产生大量废旧LIBs,如若处置不当,将带来严重的环境污染问题.废旧LIBs的正极材料中含有大量稀缺有价金属,对这些金属进行回收会产生环境和经济的双重效益.相较于传统的正极材料中金属组分的分离纯化回收技术,正极材料直接再生的策略因其具有工艺简单、能耗低、回收周期短、产品附加值高等优势而备受关注.本文综述了共沉淀法、溶胶-凝胶法、固相烧结法、水热法、离子热/熔盐法和电化学修复法6种废旧LIBs正极材料直接再生技术及其优缺点.其中共沉淀法和溶胶-凝胶法因其相对复杂的步骤、较高的设备要求和试剂成本,在工业化应用中具有一定的局限性;固相烧结法、水热法、离子热/熔盐法和电化学修复法因其便捷性和经济性,具有巨大的发展机会.同时展望了废旧LIBs正极材料直接再利用的前景和发展趋势,旨在为废旧LIBs回收领域研究提供参考.
Keyword ：
回收 回收 正极材料 正极材料 直接再生 直接再生 锂离子电池(LIBs) 锂离子电池(LIBs)
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| GB/T 7714 | 李红彦 , 谢书涵 , 张燕如 et al. 废旧锂离子电池正极材料直接再生技术研究进展 [J]. | 化工进展 , 2024 , 43 (9) : 5207-5216 . |
| MLA | 李红彦 et al. "废旧锂离子电池正极材料直接再生技术研究进展" . | 化工进展 43 . 9 (2024) : 5207-5216 . |
| APA | 李红彦 , 谢书涵 , 张燕如 , 王永净 , 王永好 , 吕源财 et al. 废旧锂离子电池正极材料直接再生技术研究进展 . | 化工进展 , 2024 , 43 (9) , 5207-5216 . |
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Spinel-type complex oxides are considered promising electrocatalysts, nevertheless, the mechanism of electrocatalytic reduction of O 2 to generate H 2 O 2 and to activate H 2 O 2 still needs to be further explored. In this work, the dependence of selectivity of electrocatalytic O 2 to generate H 2 O 2 and the efficiency of activating H 2 O 2 of defect sites in ZnFe 2 O 4 /CNT composites were investigated based on experimental data and characterization. Firstly, the ZnFe 2 O 4 /CNT composites were obtained by hydrothermal method combined with high-temperature calcination. Then phenol was used as a typical pollutant to evaluate its electrocatalytic performance. The results indicated that ZnFe 2 O 4 /CNT can degrade nearly 100% phenol of 20 mg/L and appears excellent TOC removal efficiency. Impedance experiments showed that the existence of CNT significantly promoted the electron transfer for ZnFe 2 O 4 /CNT. Raman spectroscopy and XPS analysis disclosed that the defect degree of CNT as well as oxygen vacancies of ZnFe 2 O 4 in the ZnFe 2 O 4 /CNT composites were higher than those of the individual CNT and ZnFe 2 O 4 , greatly facilitating the adsorption of O 2 . Consequently, more O 2 was reduced electrocatalytically to H 2 O 2 via the 2e process. Free radical quenching experiments and Fenton experiments showed that homogeneous and heterogeneous activation jointly promoted the conversion of H 2 O 2 to center dot OH. This work provides a strategy for the design of efficient electrocatalysts with spinel structures.
Keyword ：
Electrocatalytic oxygen reduction Electrocatalytic oxygen reduction Organic pollutant degradation Organic pollutant degradation Oxygen vacancy Oxygen vacancy
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| GB/T 7714 | Wang, Yonghao , Lu, Zhenghao , Wu, Shuang et al. Boosting electrocatalytic performance of ZnFe2O4/CNT via synergy of CNT defect and oxygen vacancies [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (3) . |
| MLA | Wang, Yonghao et al. "Boosting electrocatalytic performance of ZnFe2O4/CNT via synergy of CNT defect and oxygen vacancies" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 12 . 3 (2024) . |
| APA | Wang, Yonghao , Lu, Zhenghao , Wu, Shuang , Zou, Zhiwei , Zhang, Xinying , Wang, Yongjing . Boosting electrocatalytic performance of ZnFe2O4/CNT via synergy of CNT defect and oxygen vacancies . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (3) . |
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Arsenic existed concomitantly with minerals containing precious or non-ferrous metals, in which arsenic -containing wastewater (ACW) is inevitably generated during the process of smelting. In the treatment of ACW, the precipitation method using sulphide is widely used, but the resulting arsenic sulphide slag poses a risk of secondary pollution. In this work, a reduction strategy was developed to transform arsenic sulphide slag into elementary arsenic under hydrothermal conditions by using sodium formate as the reductant, with the aim to treat the slag and recycle As. The experimental results show that As(0) can be obtained by one-step hydrothermal reduction by sodium formate at temperature of 200 celcius and pH 4, and the purity of elementary arsenic produced under the optimum conditions is higher than 90%. Mechanism analyses reveal that the reduction process of As2S3 to As(0) experiences two steps, where amorphous As2S3 primary particles first transform and crystallize into partially reductive AsS in a bulk size, and then AsS is further reduced into As(0) through a collapse process to form small particles. This work provides a recycling strategy for the efficient conversion of arsenic sulphide slag to As(0) for potential applications.
Keyword ：
Arsenic sulphide slag Arsenic sulphide slag Hydrothermal method Hydrothermal method Recycle Recycle Reduction reaction Reduction reaction
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| GB/T 7714 | Wang, Yonghao , Liu, Youmei , Shi, Jian et al. Treatment and recycling of arsenic slag by hydrothermal reduction of As2S3 to As(0) [J]. | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2023 , 174 : 933-940 . |
| MLA | Wang, Yonghao et al. "Treatment and recycling of arsenic slag by hydrothermal reduction of As2S3 to As(0)" . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 174 (2023) : 933-940 . |
| APA | Wang, Yonghao , Liu, Youmei , Shi, Jian , Li, Mingyang , Wang, Yongjing , Zhang, Jing . Treatment and recycling of arsenic slag by hydrothermal reduction of As2S3 to As(0) . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2023 , 174 , 933-940 . |
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The chromium (Cr) pollution of soil has recently gained a lot of attention for the demand of environmental protection. One of its main resources is from the landfill of the chromium containing sludge (CCS) that produces from reduction-precipitation treatment of the Cr(VI) wastewater. In this work we provide an improved alkaline oxidation calcination (AOC) treatment for CCS, which achieves high Cr recovery efficiency at relatively low calcination temperature and oxygen-rich conditions. The leaching risk of the final residue is much reduced compared to the conventional calcination. It reveals that by using air flow the oxidation efficiency is effectively improved to a value of near to similar to 90 % at 450 degrees C. The thermal analyses of the reaction suggest that Cr (III) in CCS transforms to chromite at the temperature range of 340-450 degrees C, which ensure the subsequent oxidation. On the other hand, it reveals that at higher temperature ( 500 degrees C) it will produce Ca-Fe oxides which are confirmed to be dissolved in the leachate of the toxicity test. The concentration of Cr (III) increases obviously, which could be associated with the release of Cr(III) that doped into Ca-Fe oxides as solid solution. The transformations of the CCS components during the AOC process are depicted in detail. The method proposed here enables high oxidation efficiency of CCS and meanwhile avoids the environmental risk of final residue.
Keyword ：
Calcination Calcination Chromium containing sludge Chromium containing sludge Cr(III) oxidation Cr(III) oxidation Oxygen-rich Oxygen-rich Recovery Recovery
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| GB/T 7714 | Lin, Weibin , Xu, Yushan , Wu, Shuang et al. Oxygen-rich and moderate/low temperature calcination treatment of chromium containing sludge for high efficient Cr recovery and toxicity reduction [J]. | SURFACES AND INTERFACES , 2023 , 43 . |
| MLA | Lin, Weibin et al. "Oxygen-rich and moderate/low temperature calcination treatment of chromium containing sludge for high efficient Cr recovery and toxicity reduction" . | SURFACES AND INTERFACES 43 (2023) . |
| APA | Lin, Weibin , Xu, Yushan , Wu, Shuang , Qiu, Zhiwei , Yao, Hon , Wang, Yongjing et al. Oxygen-rich and moderate/low temperature calcination treatment of chromium containing sludge for high efficient Cr recovery and toxicity reduction . | SURFACES AND INTERFACES , 2023 , 43 . |
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Electrocatalytic reduction of nitrate to ammonia is an effective method for the recycling of NO3--N in the field of nitrate polluted water treatment. In this work, Co-N-C was prepared in this work by pyrolysis of Co-based metal organic framework at 700 degrees C and it can achieve 100 % selectivity to ammonia under the optimum experiment conditions. Impressively, no harmful nitrite generated in the reduction process because the reduction rate constant of Co-N-C for NO2- -N is higher than that of NO3- -N. Experiment results show that the chemical adsorption rather than electrostatic adsorption dominated among Co-N-C and free NO3- , which is significant for the subsequent electronic reduction process. Mechanism analysis indicated the active hydrogen (H*) reduction mechanism is predominate for Co-N-C but the direct electron mechanism is predominate for Co-C during the reduction from NO3- to NO2- . While for Co-N-C and Co-C, the subsequent reduction of NO3 to NH4+ was conducted by the direct electron mechanism. The present work not only explores high performance for the selectively electrocatalytic reduction from nitrate to ammonia but also promote new inspiration for the preparation of other Co-based functional materials for reducing the production of nitrite.
Keyword ：
Ammonia synthesis Ammonia synthesis Nitrate electroreduction Nitrate electroreduction Nitrate pollution Nitrate pollution The active hydrogen (H*) reduction The active hydrogen (H*) reduction
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| GB/T 7714 | Liu, Miao , Lu, Zhenghao , Yang, Linghan et al. Co-N bond promotes the H* pathway for the electrocatalytic reduction of nitrate (NO3RR) to ammonia [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2023 , 11 (3) . |
| MLA | Liu, Miao et al. "Co-N bond promotes the H* pathway for the electrocatalytic reduction of nitrate (NO3RR) to ammonia" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 11 . 3 (2023) . |
| APA | Liu, Miao , Lu, Zhenghao , Yang, Linghan , Gao, Renmin , Zhang, Xinying , Wang, Yongjing et al. Co-N bond promotes the H* pathway for the electrocatalytic reduction of nitrate (NO3RR) to ammonia . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2023 , 11 (3) . |
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硫化物沉淀法是最常用的处理含砷废水的方法之一,但该方法会产生大量的无定形硫化砷渣,砷渣中的砷元素在微生物和pH值等环境因素的影响下,容易重新释放到环境中引起二次污染.因此本文选取硫化砷作为研究对象,借鉴含砷废水的处理思路,将硫化砷在氧化性条件下转化成化学性质和结构稳定的臭葱石,同时回收单质硫,单质硫的回收率为90%左右,最终实现无定形硫化砷的稳定化处理.实验结果表明,最优的实验条件是水热温度和时间分别为120℃和10 h,最佳pH值为3,最佳的Fe/As摩尔比为1.2:1;在上述实验条件下,硫化砷能够一步直接转化成臭葱石,转化率达90%以上.该方法有效地减化了常见的硫化砷渣处理所涉及的溶解-调...
Keyword ：
硫化砷渣 硫化砷渣 硫单质 硫单质 稳定化 稳定化 臭葱石 臭葱石
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| GB/T 7714 | 时坚 , 李明洋 , 王永净 et al. 硫化砷渣一步水热矿化成臭葱石和单质硫的研究 [J]. | 环境化学 , 2022 , 41 (02) : 591-599 . |
| MLA | 时坚 et al. "硫化砷渣一步水热矿化成臭葱石和单质硫的研究" . | 环境化学 41 . 02 (2022) : 591-599 . |
| APA | 时坚 , 李明洋 , 王永净 , 刘峰 , 王永好 , 张静 . 硫化砷渣一步水热矿化成臭葱石和单质硫的研究 . | 环境化学 , 2022 , 41 (02) , 591-599 . |
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以硬脂酸为疏水改性剂,将其与Fe_3O_4纳米颗粒和市售CaCO_3共混,分别以不同的原料质量比,制备疏水磁性碳酸钙HMC-1和HMC-2,并将HMC-2负载在PU海绵上用以提高其实用性能。采用X射线粉末衍射仪、红外光谱仪、差示扫描量热仪、接触角/表界面张力测量仪对合成样品的物相、表面有机官能团、热稳定性及疏水性能进行系列表征分析。结果表明,HMC-2比HMC-1,具有更稳定的疏水性能,除油前后水接触角基本保持不变,约为150°,除油后该材料没有出现类似HMC-1的铁渗出现象。将HMC-2负载在PU海绵上后,改性PU海绵在3 s内可去除98%的油,重复吸油20次仍能达到95%以上的除油率,吸油...
Keyword ：
四氧化三铁 四氧化三铁 碳酸钙 碳酸钙 磁性 磁性 除油 除油
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| GB/T 7714 | 林仕宏 , 叶宝芳 , 王永净 . 疏水磁性碳酸钙的制备及其除油特性 [J]. | 材料工程 , 2022 , 50 (01) : 138-144 . |
| MLA | 林仕宏 et al. "疏水磁性碳酸钙的制备及其除油特性" . | 材料工程 50 . 01 (2022) : 138-144 . |
| APA | 林仕宏 , 叶宝芳 , 王永净 . 疏水磁性碳酸钙的制备及其除油特性 . | 材料工程 , 2022 , 50 (01) , 138-144 . |
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The hydrophobic magnetic materials of HMC-1 and HMC-2 were obtained by blending synthesized Fe3O4 nanoparticles and commercial CaCO3 powder with stearic acid solution, which is used as hydrophobic modifier. HMC-2 was loaded on the PU sponge for the further improvement of the applicability. The structural properties of the two materials were detected by X-ray powder diffractometer and infrared spectrometer. Thermal stability of HMC-2 was analysed by differential scanning calorimeter. The hydrophobic properties of the samples were determined by contact angle meter. The results show that HMC-2 has more stable hydrophobic properties than HMC-1. HMC-2 exhibits more stable hydrophobic performance. The contact angle remains nearly unchanged (about 150°) after oil removal. HMC-2 shows no release of Fe() ions, which has taken place during the oil removal experiment using HMC-1. PU sponge loaded with HMC-2 can remove 98% oil in 3 s. The oil removal rate remains 95%, after 20 times of repeated oil absorption. The mass ratio of oil adsorption/adsorbent is larger than 100. © 2022, Journal of Materials Engineering. All right reserved.
Keyword ：
Blending Blending Calcite Calcite Calcium carbonate Calcium carbonate Contact angle Contact angle Differential scanning calorimetry Differential scanning calorimetry Hydrophobicity Hydrophobicity Magnetite Magnetite Nanomagnetics Nanomagnetics Nanoparticles Nanoparticles Synthesis (chemical) Synthesis (chemical) Thermodynamic stability Thermodynamic stability
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| GB/T 7714 | Lin, Shihong , Ye, Baofang , Wang, Yongjing . Preparation of hydrophobic magnetic calcium carbonate and its oil removal properties [J]. | Journal of Materials Engineering , 2022 , 50 (1) : 138-144 . |
| MLA | Lin, Shihong et al. "Preparation of hydrophobic magnetic calcium carbonate and its oil removal properties" . | Journal of Materials Engineering 50 . 1 (2022) : 138-144 . |
| APA | Lin, Shihong , Ye, Baofang , Wang, Yongjing . Preparation of hydrophobic magnetic calcium carbonate and its oil removal properties . | Journal of Materials Engineering , 2022 , 50 (1) , 138-144 . |
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Heteroatomic co-doped carbon materials have broad application prospect in the field of persulfate-based advanced oxidation processes. In this paper, nitrogen and chlorine co-doped ZIF-8 derived porous carbon materials (NClC) were synthesized by a two-step pyrolysis method, as follows: 1.5 g ZIF-8 was transferred to a quartz boat, calcined for 6 h at 800. with a heating rate of 5 degrees C/min in a N-2 atmosphere, and cool naturally to room temperature; the black carbon material obtained was further treated with 0.5 mol/L HCl for 24 h to remove the residual Zn and then dried in a 60 degrees C oven to acquire N-doped porous carbon (NC); subsequently, 1.2 g NH4Cl was uniformly dissolved in 20 mL ultrapure water, and 0.15 g of the synthesized NC was added; after stirring and reaction for 5 h, the mixture was placed in a 60. oven to dry overnight; the dried sample was ground to a uniform powder and then calcined for 2 h at 700, 800, 900 or 1000 degrees C in a N-2 atmosphere to obtain NClCX, in which the "X" represents the secondary calcination temperature (degrees C). Additionally, NC900 was obtained by calcination of NC at 900. in the same way without any modification. The composition and structure of all carbon materials were characterized by field emission scanning electron microscope (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Raman, BET and X-ray photoelectron spectroscopy (XPS). Phenol was employed as a targeted contaminant to explore the performance of NClCX on PMS activation, and the results showed NClC900 exhibited excellent catalytic performance with 97.7% of phenol and 72.4% of total organic carbon (TOC) removal in 30 min. NClC900/PMS system presented excellent acid-base tolerance and anti-interference ability, which can effectively remove phenol over a broad pH range (pH=3 similar to 9) or under the interference of various anions (NO3-, Cl-, H2PO4-, HCO3-) and humic acid (HA). Moreover, the NClC900/PMS system performed outstanding feasibility in the removal of dyes, antibiotics, phenols, pesticide and purification of actual contaminated water samples. Cyclic experiments showed that NClC900 had good stability and could remove 72.1% of phenol after repeated use for 4 times. Quenching experiments, electron paramagnetic resonance and electrochemical analysis indicated that O-1(2) and surface-bound SO4 center dot- were the main active species for phenol degradation, and the graphite N, C-Cl of NClC900 were the key active sites for generating of O-1(2) and surface-bound SO4 center dot-.
Keyword ：
co-doped co-doped metal-organic frameworks metal-organic frameworks peroxymonosulfate peroxymonosulfate singlet oxygen singlet oxygen surface-bound radical surface-bound radical
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| GB/T 7714 | Li, Xiaojuan , Ye, Ziyu , Xie, Shuhan et al. Study on Performance and Mechanism of Phenol Degradation through Peroxymonosulfate Activation by Nitrogen/Chlorine Co-doped [J]. | ACTA CHIMICA SINICA , 2022 , 80 (9) : 1238-1249 . |
| MLA | Li, Xiaojuan et al. "Study on Performance and Mechanism of Phenol Degradation through Peroxymonosulfate Activation by Nitrogen/Chlorine Co-doped" . | ACTA CHIMICA SINICA 80 . 9 (2022) : 1238-1249 . |
| APA | Li, Xiaojuan , Ye, Ziyu , Xie, Shuhan , Wang, Yongjing , Wang, Yonghao , Lv, Yuancai et al. Study on Performance and Mechanism of Phenol Degradation through Peroxymonosulfate Activation by Nitrogen/Chlorine Co-doped . | ACTA CHIMICA SINICA , 2022 , 80 (9) , 1238-1249 . |
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