Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yanxi Chen,Fanyun Su,Yuqing Rang,Guangli Liu,Xinxing Xu,Yayun Ma,Jingjing Tang,Xiangyang Zhou,Juan Yang
With the explosive growth in demand for lithium-ion batteries (LIBs), the recycling of the valuable metal components in them has become particularly important. However, in the previous recycling of spent LIBs, lithium is easily lost resulting in wasted resources. In this paper, a new simple and efficient selective lithium extraction strategy is developed, which uses a thiourea-assisted subcritical water system to achieve preferential extraction of lithium from spent LIBs. Due to the enhancement of the lithium extraction process by subcritical water and the synergistic effect of S and N in thiourea on the spent LiNi x Co y Mn z O 2 (NCM) cathode powder, 99.9% of lithium is selectively leached into water. Meanwhile, the transition metals (Ni, Co and Mn) in the leaching residue can be leached out by dilute acid, and the corresponding leaching rates are 99.8%, 99.7%, and 99.9%, respectively. In addition, LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) cathode material with good electrochemical performance is successfully regenerated. The process has been economically and environmentally assessed as greatly simplifying the recycling process and establishing a highly efficient recycling route for spent LIBs with low environmental impact.
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
Desalination and Water Treatment
·
2024
·
IF 1
Hong-yan Wu,Wen-kai Wu,Bo Chen,Qiao-ping Kong,Jian-jun Lian
The gradual increase of antibiotics and heavy metals in aquatic environments poses a serious threat to human health and ecosystems, and finding effective methods for simultaneous removal of antibiotics and heavy metals has attracted increasing concern. In this study, a novel porous structure of thiourea-modified sodium alginate microspheres (UA-Ca) was synthesized by modification with thiourea, epichlorohydrin, and calcium chloride, and was applied for the simultaneous removal of tetracycline (TC) and Cu(II) from water. The results indicated that the UA-Ca material with 1:2 mass ratio of thiourea and sodium alginate showed the highest removal of TC and Cu(II) under the reaction condition of pH= 7. The removal process of both TC and Cu(II) follows the pseudo-second-order adsorption model and Langmuir isotherm model. UA-Ca had a high adsorption capacity toward TC and Cu(II) with the maximum value of 1.099 mmol/g and 2.793 mmol/g based on the Langmuir model at 298 K, respectively. Thermodynamical parameters revealed that TC and Cu(II) adsorption is spontaneous with endothermic nature. Competing ionic cations (Ca 2+ 、Mg 2+ 、NH 4 + ) and organics (sulfamethoxazole, hygromycin) had a certain inhibitory effect on the removal of TC and Cu(II) by UA-Ca, whereas the anionic ions (CO 3 2- 、PO 4 3- 、SO 4 2- ) all had little effect on its removal. Fourier transform infrared spectra and X-ray photoelectron spectroscopy analyses showed that the removal of TC and Cu(II) by UA-Ca was mainly due to electrostatic adsorption and surface complexation. This work provides a promising UA-Ca material for the effective removal of TC and Cu(II) in contaminated water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Energetic Materials Frontiers
·
2023
·
IF 0
Shao-cong Deng,Ya-jun Luo,Yan-zhou Qu,Xin-ru Yang,Zhi-jian Yang,Xu Zhao,Yi-ding Liu,Fu-de Nie
To improve the mechanical properties of 2,4,6-trinitrobenzene-1,3,5-triamine (TATB)-based polymer bonded explosives (PBXs), four kinds of polythiourea binders, namely the polyetherthiourea (P1), aliphatic polythiourea (P2), aromatic polythiourea (P3) and silane polythiourea (P4), were prepared and used in the PBXs. These four polythioureas were synthesized via the copolymerization of carbon disulfide (CS 2 ) and diamines with various structures under mild conditions. They were then characterized using nuclear magnetic resonance (NMR) and Fourier-transform infrared spectroscopy (FTIR). The interfacial binding energy between polythioureas and TATB was calculated via molecular dynamics simulations. The tensile and compression mechanical properties of various PBXs (PBX-P n , n = 1–4) were studied through Brazilian and compression tests and were then compared with those of the PBX with a conventional fluoro polymer binder (PBX-FP). The results show that the PBX-P1 possessed the strongest interfacial interaction energy and the best mechanical properties among all the prepared PBXs. Its Brazilian strength and strain was 11.0 MPa and 0.56%, which was 89% and 256% higher than those of the PBX-FP with the same binder proportion, respectively. Furthermore, PBX-P1 showed excellent compression mechanical properties, with a compression strength of 40.7 MPa and a compression strain of 3.53%. Moreover, its Brazilian and compression fracture energy was 600% and 101% higher than those of PBX-FP, respectively, which was beneficial for improving the PBX stability. The results of this study provide a new idea for designing TATB-based PBX with improved mechanical properties using polyetherthiourea binders.
研究领域:
材料科学
·
爆炸物工程
·
高分子化学
✓ 已验证
DOI
RSC Advances
·
2020
·Vol. 10
·期 33
·19669-19685
·
IF 3.119
Shuting Zhang,Guoqiang Li,Liyuan Duan,Hongyu Wang,Yongle Zhao,Yongfa Zhang
Graphitic carbon nitride (g-C3N4) was prepared by a simple thermal polymerization method in this work. The effects of precursor type, thermal polymerization temperature, constant temperature time and atmosphere on the crystal structure, morphology, elemental composition, valence distribution, light absorption properties and photocatalytic activity of the prepared photocatalytic materials were investigated. Taking rhodamine B (RhB) as the target degradant, the blue light catalytic activity of the photocatalytic material was studied in detail. The experimental results showed that the final pyrolysis temperature and constant temperature time are positively related to the adsorption characteristics and photocatalytic ability of the prepared materials. In addition, the adsorption capacity and photocatalytic activity of the products obtained in Ar and H2 atmospheres are better than those produced in CO and CH4, which can be attributed to the combined effect of large specific surface area and structural defects of the materials. The sample's large specific surface area, wide band gap, and excellent photogenerated carrier separation and transfer capabilities make the adsorption performance and photocatalytic performance of the products obtained with ammonium thiocyanate and thiourea as precursors better than those prepared from melamine and dicyandiamide. g-C3N4 prepared by using ammonium thiocyanate as precursor at 550 °C for 5 h under a hydrogen atmosphere showed the best catalytic activity for the degradation of RhB under blue light. It was demonstrated that g-C3N4 prepared exhibited good stability and reusability after four repeat experiments. The active components that play major roles in the degradation of RhB described herein were holes and superoxide radicals, which was inferred by free radical trapping experiments. This work provides a theoretical basis for the idea of converting the mixed salts of desulfurization waste liquid containing ammonium thiocyanate into an excellent photocatalyst g-C3N4 with visible light response.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANICA CHIMICA ACTA
·
2021
·
IF 2.545
Wen Xia,Yu-Mei Nie,Na Lei,Zhu Tao,Qiang-Jiang Zhu,Yun-Qian Zhang
The esterification reaction used to prepare butyl paraben (BP) and propyl gallate (PG) catalyzed using a cucurbit[6]uril-supported Keggin-type silicotungstic acid (Q[6]-STA) catalyst has been investigated. The Q[6]-STA catalyst has been characterized using FTIR spectroscopy, XRD, SEM, EDS, thermal analysis, and surface area studies. Q[6]-STA was easy to prepare in high yield and exhibited some advantageous properties, such as high catalytic activity and its convenient recovery. Moreover, a reusability study showed that the Q[6]-STA catalyst was stable and active.
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
Frontiers in Chemistry
·
2020
·
IF 3.693
Chen Hongjun,Liu Xiu,Deng Shuqi,Wang Hongkun,Ou Xiaoming,Huang Linya,Li Jingbo,Jin Chenzhong
In this study, pretilachlor was encapsulated into polyurea microcapsules prepared by water-initiated polymerization of polyaryl polymethylene isocyanate and eventually made into pretilachlor microcapsules suspension (PMS). We used response surface methodology (RSM) combined with the Box–Behnken design (BBD) model to optimize the formulation of PMS. The encapsulation efficiency (EE) of PMS was investigated with respect to three independent variables including wall material dosage (X1), emulsifier dosage (X2), and polymerization stirring speed (X3). The results showed that the regression equation model had a satisfactory accuracy in predicting the EE of PMS. To achieve an optimal condition for PMS preparation, the dose of wall material was set to 5%, the dose of emulsifier was set to 3.5% and the polymerization stirring speed was set to 200 rpm. The EE of PMS was up to 95.68% under the optimized condition, and the spherical shape with smooth surface morphology was observed. PMS was also proven to have delayed release capability and in vivo herbicidal activity against barnyard grass [Echinochloa crusgalli (L.) Beauv.] with an LC50 value of 274 mg/L. Furthermore, PMS had efficient weed management compared to commercially available 30% pretilachlor emulsifier (PE), showing a promising potential application for weeding paddy fields.
研究领域:
农业科学
·
植物保护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Yubin Li,Zhijian Yang,Ling Ding,Liping Pan,Jianhu Zhang,Xue Zheng,Congmei Lin
Damages generated in functional materials can deteriorate their performance and shorten their lifetime, endowing the materials with self-healing ability is expected to resolve this problem. In this work, a novel energetic composite refers to CL-20 based PBX, which can self-heal its mechanical damage under a mild condition, was designed and prepared via incorporating disulfide bonds into the polymeric binder. The highly efficient self-healing polyurethane-urea containing disulfide bonds (DSPU) was synthesized by using the prepolymer of poly(caprolactone) diol (PCL-diol) with isophorone diisocyanate (IPDI) as the main-chain to achieve good mechanical toughness, then cross-linking with bis(4-aminophenyl) disulfide (APD) to gain the superior reversibility. The CL-20 based PBX using this DSPU as binder can evidently self-heal its inner damage, i.e. micro-crack, after heating at 60 °C for several hours, and the strength of the damaged sample after Brazilian test can also be recovered to more than 70% of the pristine value.
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
DYES AND PIGMENTS
·
2023
·
IF 4.5
Yi-Chuan Huang,Xi Chu,Wen-Hao Li,Shi-Sheng Zhao,Jia-Xin Zhang,Zhen-Qiang Qin,Hong-Yan Li,Wei Xue
Excessive thiourea(TU) was demonstrated to be harmful to both environmental system and human body, so it is essential to create selective and sensitive sensors to detect TU. Herein, Four iridium(III) complexes, [(fppy) 2 Ir(PD)]PF 6 ( Ir-fppy , fppy = 2-(4-fluorophenyl)pyridine), [(fpiq) 2 Ir(PD)]PF 6 ( Ir-fpiq , fpiq = 1-(4-fluorophenyl)isoquinoline), [(dfppy) 2 Ir(PD)]PF 6 ( Ir-dfppy , dfppy = 2-(3,5-difluorophenyl)pyridine) and [(dfpiq) 2 Ir(PD)]PF 6 ( Ir-dfpiq , dfpiq = 1-(3,5-difluorophenyl)isoquinoline) bearing 1,10-phenanthroline-5,6-dione (PD) as ancillary ligands, were designed and synthesized, and employed as efficient chemosensors to identify thiourea . These iridium(III) complexes exhibited emission peaks between 541 nm and 583 nm with PLQY ranging from 0.12 to 0.26 and lifetime in the range of 2.65–2.74 μs. All the four iridium(III) complexes showed significant turn-on response to TU with low limit of detect on the order of 10 −8 M. Furthermore, these iridium(III) complexes-based chemosensors exhibited excellent recoveries toward TU in various juice samples including orange, kiwi fruit and lemon juice. Four complexes-composite test strips showed marker color change after adding TU.
研究领域:
化学传感器
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 42
·51226
·
IF 3.125
Yifan Liu,Ruihan Pei,Yuancai Lv,Chunxiang Lin,Jianhui Huang,Minghua Liu
Due to the low concentration of silver in water, most of the cellulose adsorbents exhibited low removal efficiency, which greatly limited their practical applications. Herein, a cellulose aerogel modified by thiosemicarbamide (CAT) was fabricated for reducing and adsorbing silver ions from low concentration wastewater. The characterization results concluded that CAT owned a three-dimensional spongy structure with many circular microspheres and a better specific surface area (19.37 m 2 g −1 ), as well as the functional groups of ─C═N + ─H and ─(C═S)─N. The static batch adsorption experiments demonstrated that CAT could reached the maximum removal percentage of 94.94% and adsorption capacity of 42.12 mg g −1 under the initial concentration of Ag(I) was 15 mg L −1 and the pH value was 7. Meanwhile, the adsorption of Ag(I) on CAT was second-order reaction, and the Langmuir model could better fit the adsorption process. In addition, CAT exhibited wide pH values (1–9) adaptability and excellent adsorption performance for silver through electrostatic interaction, chelation, and reduction. This study probably provides a new method as well as important experimental data and theoretical reference for the removal of silver ions and other metals.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Ying Zhang,Xiaobo Nie
We introduce a facile way to synthesize high-quality CdSe quantum dots (QDs) in a high-boiling two-phase liquid/liquid system. The cadmium myristic acid salt (Cd-MA) dispersed in the dimethylbenzene and selenourea dissolved in the ethylene glycol (EG) reacted at the two-phase interface for the nucleation and growth of nanocrystals. The n -trioctylphosphine oxide (TOPO) was used as capping agent of the CdSe QDs. In this route, the selenourea used as the precursor was dissolved in viscous ethylene glycol (EG), which facilitated the control of the nanocrystal growth by virtue of the slow decomposition and diffusion of selenourea in EG. The size, shape, crystalline structure and optical properties of CdSe QDs were investigated by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), UV⿿vis spectrometer and photoluminescence spectroscopy. This route could be exploited to synthesize nanocrystals with a large scale and could broaden to synthesis of metal or other semiconductor nanocrystals.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2016
·Vol. 34
·期 9
·1070-1078
·
IF 1.811
Feng Li-dong,Xiang Sheng,Sun Bin,Liu Yan-long,Sun Zhi-qiang,Bian Xin-chao,Li Gao,Chen Xue-si
Poly(ether urethane)s (PEU), including PEUI15 and PEUH15, were prepared through chain-extension reaction of poly(ethylene glycol) (PEG-1500) using diisocyanate as a chain extender, including isophorone diisocyanate (IPDI) and hexamethylene diisocyanate (HDI). These PEUs were used to toughen polylactide (PLA) by physical and reactive blending. Thermal, morphological, mechanical and aging properties of the blends were investigated in detail. These PEUs were partially compatible with PLA. The elongation at break of the reactive blends in the presence of triphenyl phosphate (TPP) for PLA with PEUH15 or PEUI15 was much higher than that of the physical blends. The aging test was carried out at -20 °C for 50 h in order to accelerate the crystallization of PEUs. The PEUs in the PLA/PEU blends produced crystallization and formed new phase separation with PLA, resulting in the declined toughness of blends. Fortunately, under the aging condition, although PEUH15 in blends could also form crystallization, the reactive blend of PLA/PEUH15/TPP(80/20/2) had higher toughness than the other blends. The elongation at break of PLA/PEUH15/TPP(80/20/2) dropped to 287% for the aging blend from 350% for the original blend. The tensile strength and modulus of PLA/PEUH15/TPP blend did not change obviously because of the crystallization of PEUH15.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 15
·3196-3203
·
IF 1.915
Jing-Nie,Yang-Guang Wang,Li-Ye Yang,Wei-Jian Wu,Di Yu,Xiao-kun OuYang
In this study, the dissipation and enantioselective degradation of trichlorfon (TF) enantiomers in mariculture pond water was investigated under various conditions using a chiral HPLC method. The results showed that the TF enantiomers dissipated following first-order kinetics in the mariculture pond water under natural, dark, sterile, and dark and sterile conditions. S-(+)-TF degraded more rapidly than R-(−)-TF under natural and dark conditions, whereas the dissipation of TF enantiomers in mariculture pond water was non-enantioselective under sterile, and dark and sterile conditions. Light and microbial activity played important roles in the dissipation of the TF enantiomers in mariculture pond water, and the TF enantiomers degraded faster at higher temperatures. Microbial activity was found to be responsible for the enantioselectivity under these conditions. The results of the study can be used to evaluate the environmental risk of TF at the enantiomer level.
研究领域:
环境科学
·
毒理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）