Advanced Energy Materials
·
2023
·Vol. 13
·期 37
·2302058
·
IF 27.8
Zhenzhen Liu,Huaimeng Li,Miaomiao Han,Liang Fang,Zhen Fu,Haimin Zhang,Guozhong Wang,Yunxia Zhang
Faced with the forthcoming tide of retired lithium-ion batteries (LIBs), it is imperative to explore effective regeneration and upcycling strategies to alleviate the resource shortage, address environmental pollution, and cater to the demand for high-energy-density cathode materials. Herein, a facile, non-constructive, one-stone-for-three-birds solid-phase sintering strategy is proposed to regenerate the degraded LiCoO 2 (D-LCO) cathode and even upgrade its stability at high voltages, in which three birds, i.e., lithium supplement, Li 2 SO 4 coating, and Mn doping into Co sites while N, S doping into Li-O slabs are simultaneously hit with one stone (one-pot solid-phase sintering). Benefiting from these favorable characteristics, the upcycled cathode not only yields high discharge-specific capacity of 188.2 mAh g −1 at 0.2 C, but also delivers superior cycling performance with 92.5% of capacity retention after 100 cycles (86.4% after 300 cycles) at 0.5 C and excellent rate capability at a high cutoff voltage of 4.5 V, superior to a freshly commercial counterpart. This work is expected to provide meaningful guidance for the upcycling of D-LCO into high-energy-density batteries with long-term cycling stability.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Materials
·
2024
·
IF 13
An Zhong,Congzhen Xie,Bin Gou,Jiangang Zhou,Huasong Xu,Song Yu,Daoming Zhang,Chunhui Bi,Hangchuan Cai,Licheng Li,Rui Wang
Epoxy resin, characterized by prominent mechanical and electric-insulation properties, is the preferred material for packaging power electronic devices. Unfortunately, the efficient recycling and reuse of epoxy materials with thermally cross-linked molecular structures has become a daunting challenge. Here, we propose an economical and operable recycling strategy to regenerate waste epoxy resin into a high-performance material. Different particle size of waste epoxy micro-spheres (100–600 μm) with core-shell structure is obtained through simple mechanical crushing and boron nitride surface treatment. By using smattering epoxy monomer as an adhesive, an eco-friendly composite material with a “brick-wall structure” can be formed. The continuous boron nitride pathway with efficient thermal conductivity endows eco-friendly composite materials with a preeminent thermal conductivity of 3.71 W m −1 K −1 at a low content of 8.5 vol% h-BN, superior to pure epoxy resin (0.21 W m −1 K −1 ). The composite, after secondary recycling and reuse, still maintains a thermal conductivity of 2.12 W m −1 K −1 and has mechanical and insulation properties comparable to the new epoxy resin (energy storage modulus of 2326.3 MPa and breakdown strength of 40.18 kV mm −1 ). This strategy expands the sustainable application prospects of thermosetting polymers, offering extremely high economic and environmental value.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Tingting Zhang,Yi Li,Xudong Zhao,Weihua Li,Xiuyun Sun,Jiansheng Li,Rui Lu
During the boronic acid production process, boronic acid emission causes considerable loss of resources and water pollution. At present, adsorption is the preferred technology to treat boron pollution. Although conventional adsorbents are simple and effective, their regeneration and recovery are challenging, which hinder their wide-scale application. Considerable research efforts have been devoted to resolving the two issues mentioned above. Herein, a novel boron-adsorbing magnetic material with a cis -diol structure possessing boronate affinity was prepared. 3-Hydroxytyramine hydrochloride auto-polymerization (PDA), magnetic graphene oxide (GO) synthesis, polyethylenimine (PEI) self-assembly, and a 3,4-dihydroxyphenylpropionic acid (DHHA) covalent bonding procedure were conducted to synthesize a Fe 3 O 4 /PDA/GO/PEI/DHHA nanocomposite. This nanocomposite exhibited excellent adsorption performance and was easily recycled using an external magnetic force. The boronic acid was separated and recovered by simply adjusting the pH of the solution. The nanocomposite’s adsorption capacity reached 91.46 mg g - 1 at 30 °C with 4-formylphenylboronic acid (FPBA) as a model compound. Besides, the adsorption capacity of the nanocomposite was maintained at >89% of its original value even after five cycles. It was confirmed that the adsorption was primarily a thermochemical reaction controlled by entropy change. Thus, this novel adsorbent can be used for boron removal because it exhibits significant boronate affinity and high regeneration ability and is easy to recycle.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Juan Wu,Wei Jiang,Aipeng Deng,Yewen Shen,Wei Jiang,Renbing Tian
In this work, a high-performance probe for Hg 2+ detection has been successfully synthesized based on Rhodamine B isothiocyanate (RBI) and thioglycolic acid (TA) co-modified Fe 3 O 4 @Au nanocomposites. The probe has many favorable properties, including suitable size and magnetic response (46.28 emu/g). Importantly, the fluorescence changes of the probe are remarkably specific for Hg 2+ in the presence of other competitive cations, and the limit of detection (LOD) for Hg 2+ in aqueous solutions is lower (3.03 nM) than the value of the World Health Organization (30 nM), which meet the selective and sensitive requirements for practical application. Interestingly, due to the magnetic responsive performance of Fe 3 O 4 , the probe can be recycled by a magnet and reused by addition of free RBI into Fe 3 O 4 @Au solutions that were already used for Hg 2+ detection. Furthermore, the experiments of probe for monitoring Hg 2+ inside human umbilical vein endothelial (HUVEC) cells reveal that the probe has biocompatibility and low cytotoxicity, and can effectively detect Hg 2+ in a short time. All the results presented in this study show that the proposed probe has significant potential for Hg 2+ detection in environmental and biological samples.
研究领域:
分析化学
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生物医学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Shenwen Fang,Bin Chen,Ting Chen,Ming Duan,Yan Xiong,Peng Shi
In this work, a novel magnetic demulsifier was synthesized by a facile way within one step. The propyleneoxide-ethyleneoxide block polyether , one of the most frequently used demulsifier in petroleum industry , was endowed with the magnetism by reacting with iron (III) acetylacetonate. The as-prepared magnetic demulsifier was characterized by transmission electron microscopy (TEM), superconducting quantum interference device (SQUID), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The magnetic demulsifier showed excellent demulsification performance for water in crude oil emulsion. The demulsification process was revealed by using confocal microscope. Besides, the used magnetic demulsifier could be readily recycled by magnetic separation and solvent washing, and it presented excellent demulsification performance within 3 cycles. The findings in this work might provide a facile approach to prepare varieties of magnetic demulsifiers.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 5
·3003-3011
·
IF 3.361
Jian Wang,Cheng Zhang,Xiao-Qing Ye,Wenting Du,Shenxin Zeng,Jian-Hong Xu,Hong Yin
An efficient and practical benzylic aerobic oxidation catalyzed by cheap and simple N-hydroxyimide organocatalyst has been achieved with high yields and broad substrate scope. The organocatalyst used can be recycled and reused by simple workup and only minute amount (1 mol% in most cases) of simple iron salt is used as promoter. Phenyl substrates with mild and strong electron-withdrawing group could also be oxygenated in high yields as well as other benzylic methylenes. Influence of substituents, gram-scale application, catalysts decay and general mechanism of this methodology has also been discussed.
研究领域:
有机化学
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催化化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Ziheng Yang,Xiuhua Chen,Shaoyuan Li,Wenhui Ma,Yi Li,Zudong He,Huanran Hu,Tong Wang
Recycling of kerf-loss slurry waste has become a meaningful and urgent issue in recent years. In this study, a novel hybrid material was prepared by Ag-assisted chemical etching kerf loss silicon waste and subsequently functionalized by a facile three-step graft process of 3-aminopropyltrimethoxy-silane, maleic anhydride, and ethylenediamine, named as EDA-MAH-APTES-NPSi, which could work as an effective adsorbent for removal of Cd(Ⅱ) from aqueous solution. The effect of initial pH, absorption duration, and metal ion concentrations on absorption performance were investigated. The adsorption equilibrium achieved after 120 min, the maximum adsorption capacity reached up to 210.01 mg/g and pH was at 5.5. The adsorption kinetic was fitted in the pseudo-second-order model and the Freundlich equation provided an accurate description for adsorption behavior. The XPS and FT-IR analysis manifested that Cd(Ⅱ) removal might be ascribed to the adsorption on the surface organic functional group by chemical chelating reaction and the ion exchange reaction. The EDA-MAH-APTES-NPSi maintained excellent adsorption capacity which decreased approximately 15.3 % (from 40.5–34.3 mg/g) after five successive regenerated cycles. The work confirms the potential of Cd(Ⅱ) removal from aqueous solution based on the modified NPSi and opens up a new way for recycling silicon cutting waste.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Ni Ai,Wenye Deng,Yi Liu,Yan Xue,Jinyang Li,Kai Ding,Pengjun Zhao,Aimin Chang,Penggao Liu,Yongxin Xie
The recovery of valuable metals from spent LIBs is essential for environmental protection and economic development. This study used a green and mild organic mixed acid to leach valuable metals from spent LIBs to prepare thermally sensitive ceramics. The effects of acid concentration, temperature, time, and S/L on the leaching efficiency were investigated during the leaching process. The effects of the elemental molar ratio on the ceramic properties were also explored. The results revealed that there was an optimum leaching efficiency at 1.25 M citric acid, 0.5 M ascorbic acid, 70 min, 353 K, 50 g/L, and 500 r/min. The characterization of the substances before and after leaching by XRD and SEM confirmed the effective leaching of valuable metals by the mixed acids. FT-IR, Raman, and UV-Vis analyses further verified that the mixed acids leached valuable metals through the synergistic effect of acidity and reduction. The leaching kinetics study revealed that the leaching process conforms to the leaching mechanism of the Arvami equation. Thermal ceramic materials were prepared by co-precipitation of mixed acid leaching spent LIBs. Mn 1.2 Co x Ni 1.8-x O 4 (x = 1.5) ceramics have excellent crystalline shapes and densification. The R-T curves confirmed that Mn 1.2 Co x Ni 1.8-x O 4 has significant thermally sensitive ceramic properties. This study is the first to use spent LIBs with valuable metals for the preparation of thermal ceramics, which provides a new way to recycle and apply valuable metals in spent LIBs.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
RUBBER CHEMISTRY AND TECHNOLOGY
·
2024
·Vol. 97
·期 2
·190-203
·
IF 1.2
Gao Lining,Li Li,He Rui,Zheng Xinqiu,Qin Ruihao
The recycling of waste rubber is very important for environmental protection, but the compatibility problem restricts the recycling and application of waste rubber powder (WRP). Devulcanization of WRP has been proven to be an effective method to improve the solubilization effect. The use of environmentally friendly nontoxic solvents can not only improve the devulcanization effect but also avoid secondary pollution. Thus, in this article, an environmentally friendly deep eutectic solvent (DES) is first prepared and then applied to the devulcanization treatment of WRP. The results show that the prepared DES has a positive devulcanization effect, and the devulcanization rate can reach 50%. The devulcanization mechanism can be divided into two aspects: (1) adsorption and removal of sulfur-containing low-molecular compounds and (2) destruction of the crosslinking structure and improvement of fluidity. Observation of the microstructure showed that the rougher the surface of the desulfurized rubber powder, the more conducive to the crosslinking reaction with the matrix material to form a uniform whole. The devulcanization mechanism of DES is divided into destroying the sulfur-containing cross-linked structure and adsorbing the sulfur-containing low-molecular compounds. The surface of WRP after DES treatment is rougher and more porous, which is beneficial to the crosslinking reaction with the matrix material. Finally, the optimum process conditions for the de-crosslinking effect are determined by orthogonal test as follows: liquid-solid ratio 15∶1, temperature 120°C, time 0.5 h.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 9
·2487-2493
·
IF 9.405
Xu Zhao,Xiong-Lei Wang,Fei Tian,Wen-Li An,Shimei Xu,Yu-Zhong Wang
The recycling of thermoset polymer wastes has been challenging due to their stable three-dimensional network structure. Current methods have the problems of long time of the reaction process, harsh conditions and complex separation. Herein, we developed a facile and mild approach for high-efficiency recycling and reuse of thermoset epoxy. First, the epoxy resin was pretreated with dichloromethane to obtain a loose and porous structure, and then degraded by microwave-assisted catalysis of diethylenetriamine (DETA). DETA in the system functions as a catalyst, a reactant and a solvent. The degradation degree of the epoxy resin reached 99% at 130 °C only in 50 min. The degradation products were characterized by FTIR, NMR, SEM, GPC, TGA and elemental analysis and the degradation mechanism was proposed. During the reaction, the ester bonds in the cross-linked structure were selectively cleaved by the amination of DETA, and the epoxy resin was fully converted to oligomers that contained multifunctional reactive groups. The degradation liquid containing oligomers and unreacted DETA can be used as a curing agent and is directly mixed with the uncured epoxy to obtain recycled epoxy resin with high modulus and high thermal stability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2016
·
IF 3.782
Shengyang Tao,Yunzhe Ding,Lei Jiang,Guangtao Li
A series of monodispersed microspheres with hierarchically porous structures were prepared by microfluidic devices. Phase separation of the silica sol in microdroplets was adopted to construct these structures. The effects of velocity ratios (for both the continuous and the dispersed phases), collection solvents and calcination temperatures were investigated. The diameters of the microspheres were tuned from 148 μm to 940 μm by adjusting the velocity ratio. Tests revealed that the surface areas and pore volumes of the microspheres can reach 495 m 2 g −1 and 0.6068 ml g −1 , respectively. The macroporous structure can be controlled by the collection solvents, and the wettability of the microspheres is determined by the calcination temperature. A calcination temperature of 450 °C leads to a hydrophilic surface property. Fe 3 O 4 nanoparticles were added to the silica sol to form magnetic microspheres, and the porous structure was not affected. This kind of hybrid microsphere adsorbs 3.29 times its own weight in toluene. These spheres can adsorb oil on water surfaces, and then be removed from the water with an external magnetic field. The microspheres can be recovered and reused more than 10 times.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science-Processes & Impacts
·
2013
·Vol. 16
·期 3
·524-533
·
IF 0
Shaolin Li,Wei Wang,Weile Yan,Wei-xian Zhang
A field demonstration was conducted to assess the feasibility of nanoscale zero-valent iron (nZVI) for the treatment of wastewater containing high levels of Cu(II). Pilot tests were performed at a printed-circuit-board manufacturing plant, treating 250 000 L of wastewater containing 70 mg L−1 Cu(II) with a total of 55 kg of nZVI. A completely mixed reactor of 1,600 L was operated continuously with flow rates ranging from 1000 to 2500 L h−1. The average Cu(II) removal efficiency was greater than 96% with 0.20 g L−1 nZVI and a hydraulic retention time of 100 min. The nZVI reactor achieved a remarkably high volumetric loading rate of 1876 g Cu per m3 per day for Cu(II) removal, surpassing the loading rates of conventional technologies by more than one order of magnitude. The average removal capacity of nZVI for Cu(II) was 0.343 g Cu per gram of Fe. The Cu(II) removal efficiency can be reliably regulated by the solution Eh, which in turn is a function of nZVI input and hydraulic retention time. The ease of separation and recycling of nZVI contribute to process up-scalability and cost effectiveness. Cu(II) was reduced to metallic copper and cuprite (Cu2O). The end product is a valuable composite of iron and copper (∼20–25%), which can partially offset the treatment costs.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
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