Journal of Water Process Engineering
·
2025
·
IF 6.7
Yaoyu Yan,Shuchen Sun,Jing Wei,A. Shubo,Faxin Xiao,Ganfeng Tu
Electrolytic manganese residue (EMR), a hazardous solid waste from electrolytic manganese metal (EMM) production, poses serious environmental risks due to its complex mineralogy and heavy metal mobility. However, it also holds potential as a secondary resource. We establish an end-to-end waste-to-materials flowsheet—sulfuric-acid curing → water leaching → impurity removal → one-step conversion—that selectively recovers Mn from EMR and upgrades it to phase-pure, high-value Mn₃O₄ nanomaterials. The effects of curing temperature and acid dosage on the leaching behaviors of Mn, Fe, Al, and Si were systematically investigated. At 240 °C and an acid dosage of 2.5 times the stoichiometric requirement, Mn leaching efficiency reached 95.35 %, while Si leaching remained below 50 % due to silicate encapsulation and gelation. Kinetic modeling using the shrinking core model revealed that Mn dissolution was primarily controlled by product-layer diffusion, with an apparent activation energy of 14–18 kJ·mol −1 . FTIR, XRD, SEM–EDS, and BET analyses showed that acid curing disrupted the dense silicate matrix and increased surface area from 9.4 to 55.6 m 2 ·g −1 . Mn 2+ in the purified leachate was directly precipitated and oxidized using an NH₃·H₂O–H₂O₂–EDTA system, producing uniformly sized Mn₃O₄ nanoparticles. Rather than a stand-alone synthesis, the impurity-tolerant process with defined operating windows is the core contribution, with the Mn₃O₄ product validating this waste-to-value pathway. This integrated route offers a scalable framework for hazardous-waste valorization while clarifying sulfuric-acid-curing transformation and leaching kinetics, advancing sustainable metal recovery.
研究领域:
环境科学与技术
·
湿法冶金
·
废物资源化
·
材料科学
·
浸出动力学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Xiao Zhang,Menglin Zhang,Zhiren Guo,Xiang Li,Ting Liu,Jinying Li,Dongxiang Zhang,Xiyan Xu
The persistent contamination of aquatic environments by tetracycline (TC) necessitates advanced remediation strategies. Herein, a ternary Fe–O–P-co-modified graphitic carbon nitride (FOPCNx) was synthesized via structural integration of Fe–N2 configurations with O/P dual doping for efficient TC degradation in a solar-driven photo-Fenton system. This study pioneers the synergistic coupling of Fe–N2 coordination and heteroatomic O/P substitution to optimize charge dynamics. Comprehensive characterization confirmed the formation of Fe–N2 active sites and aromatic structures incorporated with the aromatic group, which collectively enhanced visible-light absorption, suppressed electron–hole recombination, and facilitated charge carrier redistribution. The optimized FOPCN2 demonstrated exceptional photoelectric efficiency (3.7-fold higher photocurrent density than pristine g-C3N4) and achieved 98.9% TC removal within 40 min of irradiation with a kinetic constant of 0.113 min–1, outperforming conventional systems. Mechanistic studies revealed dual enhancement pathways: Fe–N2 sites promoted electron transfer and Fe(III)/Fe(II) cycling, while the O/P dual doping enabled electron delocalization for improved charge mobility. The system exhibited remarkable pH adaptability (3–7), robust resistance to inorganic anions, and universal degradation capability for mixed organic pollutants. Three TC degradation pathways were identified through intermediate analysis, with radical trapping and EPR verification confirming the dominant roles of •OH, e–, and O2•–. This work provides critical insights into structure–activity relationships for carbon nitride modification, establishing a paradigm for designing multifunctional photocatalysts for antibiotic-contaminated wastewater remediation.
研究领域:
环境科学
·
材料科学
·
光催化
·
水处理
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2025
·
IF 6.6
Zixuan Tan,Yihong Cai,Bo Yang,Hao Huang,Haijun Guo,Min Zhuang,Hui Luo,Qingwei Meng,Shaoqu Xie
Graphical Monohydric alcohols are a potential fuel, and herein, monohydric alcohols have been selectively synthesized from multicarbon sugars by modulating the electron distribution of Ru and enhancing the hydrodeoxygenation process of biomass. Ru-based catalysts are widely used in catalytic reactions, but the electron-deficient nature promotes strong decarbonylation, leading to complete deoxygenation during the conversion of polyhydroxy biomass. Despite extensive research, effectively suppressing this decarbonylation activity remains challenging. Herein, electron-rich Ru and electron-deficient Ni formed due to the electron migration of Ni → Ru have a synergistic catalytic effect, controlling the precise cleavage of C N bonds by Ru 0 and retaining most of the C O bonds. The amorphous Al 2 O 3 is sufficiently bound to the substrate to promote rapid hydrogenation. This modification effectively suppresses the intrinsic decarbonylation activity of Ru and improves selectivity for hydrodeoxygenation. Using carbohydrates as substrates, the Ru–Ni bimetallic catalysts preferentially promote the hydrodeoxygenation pathway, resulting in a significant increase in C3+ monohydric alcohol yields. This work presents a new strategy for modulating reaction pathways via electronic structure engineering, offering valuable insights into the potential of Ru–Ni systems for biomass conversion and sustainable alcohol synthesis.
研究领域:
催化化学
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材料科学
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化学工程
·
生物质转化
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可持续化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MECHANISMS OF AGEING AND DEVELOPMENT
·
2022
·
IF 5.498
Wen Chen,Zhen Chen,Shuo Shan,Aibo Wu,Chao Zhao,Xiang Ye,Xiaodong Zheng,Ruiyu Zhu
Microplastic pollution has attracted growing attention due to its prevalent and persistent exposure to general population through the food chain, but few reports have focused on the toxicological prevention of polystyrene (PS). Using the wild-type and mutant strains, this study explored the impacts of PS and cyanidin-3-O-glucoside (C3G) on stress tolerance and lifespan of Caenorhabditis elegans ( C. elegans ). In N2 nematodes, PS exposure initiated the oxidative stress and subsequent lifespan reduction, while these adverse impacts could be positively improved by C3G treatment. Considering the pivotal role of DAF-16 pathway in stress tolerance and lifespan regulation, the expression of the daf-16 gene and its downstream antioxidant genes ( clt-2 , hsp-16.1 , sod-3 , sod-5 ) were examined, and found to be significantly enhanced by C3G. Since the sod-3 gene was up-regulated the most fold by C3G, the activity of SOD enzyme that encoded by the sod-3 was examined, and could be obviously enhanced upon C3G treatment. This explained the improved oxidative stress and delayed oxidation-associated aging after C3G intervention. Nevertheless, these positive effects of C3G were weakened in daf-16 (-) mutant strain (with deleted DAF-16 gene), for which the beneficial effects of C3G in promoting stress resistance and lifespan extension were inhibited. These findings suggested that the DAF-16 gene and its downstream antioxidant genes, have participated in C3G’s regulations on redox balance and lifespan that impacted by nano-polystyrene particles. This study highlighted the link between dietary components and environmentally driven disturbance.
研究领域:
环境科学
·
分子生物学
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毒理学
✓ 已验证
DOI
PubMed
高影响因子
Science China-Materials
·
2021
·Vol. 64
·期 7
·1598-1608
·
IF 8.273
Hu Jiahui,Tang Wu,Liu Sihong,Hu Yang,Yan Yichao,Lai Huanhuan,Xu Liang,Fan Cong
A new organic cathode namely potassium 2,6-dihydroxyanthraquinone (AQ26OK, theoretical capacity ( C T ) = 169 mA h g −1 ) is synthesized and fully characterized for K-ion batteries. AQ26OK is called polyanionic organic cathode because it has a polyanionic organic skeleton (−2 valent) and two strong ionic K-O bonds. Consequently, the polyanionic AQ26OK is hardly soluble into most organic liquid electrolytes. In half cells (0.3–3.4 V vs. K + /K) using 1 mol L −1 KPF 6 in dimethoxyethane, AQ26OK delivers a highly stable specific capacity of 201 mA h g −1 @50 mA g −1 over 450 cycles (4-month test) and realizes ~106 mA h g −1 for 3200 cycles at 500 mA g −1 . Using the reduced state (K 4 TP) of potassium terephthalate (K 2 TP) as the organic anode, the resulting K 4 TP II AQ26OK organic potassium ion batteries can display a highly stable average discharge capacity of 135 mA h g −1 cathode over 250 cycles at 100 mA g −1 and ~47 mA h g −1 for 1000 cycles at 500 mA g −1 during the working voltage of 0.01–3.1 V. To the best of our knowledge, AQ26OK is among the best stable cathodes reported for K ion batteries.
研究领域:
电化学
·
能源材料
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有机电池
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电极材料
·
储能技术
✓ 已验证
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Heng Zhang,Biao Hu,Yangmin Wu,Minglong Yan,Qinhao Zhang,Wenwu Xu,Wenjie Zhao
Metal corrosion and mechanical wear result in a serious decrease in the service life of marine engineering equipment. Carbon-based quantum dots (CDs) are often used as corrosion inhibitors or lubricants due to their ease of functionalization and quantum size effect. However, the protection efficiency of CDs is limited by weak adsorption capacity, and additional doping of heteroatoms such as N and S is usually needed to enhance the adsorption. Here, Ti 3 C 2 T x quantum dots (MQDs) were synthesized by using two-dimensional Ti 3 C 2 T x sheets containing abundant functional groups on the surface as precursors. The corrosion inhibition efficiency of MQDs with a concentration of 400 mg L −1 reached 94.2 %, and the coefficient of friction and wear rate were reduced by 67.6 % and 83.2 %, respectively, compared with the single NaCl solution. Surface analysis showed that MQDs blocked the penetration of corrosive species via forming a protective film on the steel surface through the formation of Ti–O–Fe coordination bonds. Notably, the thickness of protective film was affected by the pH of solution, reaching a maximum thickness of 215 nm at the NaCl solution with a pH of 7. Finally, density functional theory and molecular dynamics simulations were utilized to deeply reveal the adsorption mechanism of MQDs. This study provides new insights into the role of MQDs as dual-functional additives, which is of great significance in promoting the development of multifunctional marine engineering protective materials.
研究领域:
材料科学
·
腐蚀工程
·
纳米技术
·
表面化学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
Water
·
2025
·Vol. 17
·期 17
·2505
·
IF 3
Siqi Tong,Guangbing Liu,Xi Meng,Chunkai Huang,Siwen Chen,Zhiquan Xiang,Weijing Liu,Jinyou Shen,Yi Wang
With increasing wastewater treatment demands and decarbonization goals, synergistic reduction in pollutants and green house gas (GHG) emissions is crucial. High process emissions like N2O pose significant challenges, yet optimized carbon reduction strategies for conventional plants are lacking. This study developed three mathematical models to quantify the impact of dissolved oxygen (DO), influent salinity, and C/N ratio on direct emissions (CH4, N2O) and indirect emissions. Response Surface Methodology (RSM) optimized these factors to minimize GHG emissions under three accounting scenarios: (1) plants with CH4reuse systems: salinity = 0.5 g L−1, DO = 3.67 mg L−1, C/N = 12.75; (2) plants focusing solely on direct emissions: salinity = 0.5 g L−1, DO = 3.35 mg L−1, C/N = 3; and (3) plants assessing total emissions: salinity = 0.5 g L−1, DO = 2.5 mg L−1, C/N = 7.18. Key findings indicated that increasing salinity exacerbated greenhouse gas emissions. Elevated DO levels in the aerobic stage reduced N2O emissions but increased indirect emissions in the A2/O process. Higher C/N ratios promoted anaerobic CH4production, but sufficient carbon reduced N2O by enabling complete heterotrophic denitrification. A 60−day continuous GHG emissions monitoring campaign was conducted at a WWTP to validate the actual emission reductions achievable under the identified optimal control conditions. An analysis and comparison of operational and economic costs were also performed. The findings provide practical insights into sustainable GHG emission management and offer potential solutions to advance the synergistic reduction in GHG emissions and pollutants.
研究领域:
环境工程
·
水处理技术
·
环境化学
·
污染控制
·
可持续发展
·
温室气体管理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Yan Ma,Peng Zeng,Yan Ma,Xiaomei Yang
Supercapacitors have been extensively studied for their excellent power density and cycle life, but they are limited by low energy density. This study successfully prepared nitrogen/oxygen/boron (N/O/B) co-doped phenolic resin-based porous carbon materials (NBC) through a sol-gel method combined with high-temperature carbonization and activation processes, and systematically investigated their electrochemical performance in supercapacitors. By adjusting the amount of boric acid and the carbonization temperature, the pore structure and heteroatom doping levels of the materials were optimized. Experimental results demonstrate that when the carbonization temperature is 700 °C and the mass ratio of L-tyrosine to boric acid is 1:1, the obtained sample NBC-700-1 exhibits a high specific surface area (1721 m 2 g −1 ), an abundant micro/mesoporous hierarchical structure, and uniform N/O/B doping (N content: 8.31 at.%, O content: 14.11 at.%, B content: 0.55 at.%). In a three-electrode system, NBC-700-1 (377 F g −1 ) exhibits superior specific capacitance, high rate performance (73% capacitance retention at 20 A g −1 ), and long cycle stability at 0.5 A g −1 in 6 M KOH electrolyte compared to NBC-600-1 (300 F g −1 ), NBC-700-0.5 (290 F g −1 ), NBC-700-2 (268 F g −1 ), and NBC-800-1 (351 F g −1 ). Furthermore, a symmetric supercapacitor assembled with Na 2 SO 4 gel electrolyte achieves an energy density of 29.9 Wh kg −1 at a power density of 550 W kg −1 , along with broad temperature adaptability (−25 to 75 °C) and remarkable flexibility (no significant performance degradation after 180° bending). Additionally, the design of a PVA-based gel electrolyte with wide pH applicability provides new insights for the application of such devices in complex environments.
研究领域:
储能
·
材料科学
·
电化学
·
纳米技术
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Jing Zhang,Peiqi Shen,Yuchun Liu,Tianchen Wei,Xingwu Zhai,Baichuan Zhu,Jianrong Zeng,Kun Xu,Min Zhou
Lithium carbonate, the primary discharge product in Li–CO 2 batteries with high thermodynamic stability and a wide band gap, leads to significant electrochemical inertness, limiting efficiency and cycle life. The strongly delocalized p z orbital at a lower-energy HOMO level in Li 2 CO 3 causes weak coupling with the O-p z orbitals, increasing decomposition resistance owing to d-orbital degeneracy in high-local-symmetry catalysts. This study introduces metastable tetragonal-pyramidal nickel sulfide (tp-NiS) with low-symmetry NiS 5 coordination, breaking d-orbital degeneracy and bringing d z 2 , d xz , and d yz orbitals closer to the Fermi level. Enhanced orbital overlap with Li 2 CO 3 O-p z orbitals facilitates robust Ni–O bond formation. In situ spectroscopy confirms reversible Ni–O bond formation during cycling, ensuring electron transfer and complete Li 2 CO 3 decomposition. Conversely, weak interfacial interactions in octahedral NiS with highly symmetric local coordination only allow decomposition-resistant Li 2 CO 3 and interface passivation. Consequently, tp-NiS exhibits superior electrochemical performance, with the best reported reversibility and stability, a charge potential below 4.0 V, and 92.03% capacity retention after 1800 h. This metal redox-driven mechanism establishes a reversible geometric conversion pathway, emphasizing the critical role of symmetry-engineered Ni–O interactions in bifunctional catalysts.
研究领域:
电化学
·
材料科学
·
储能
·
催化
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemistry-An Asian Journal
·
2021
·Vol. 16
·期 15
·2146-2153
·
IF 4.568
Liling Lei,Yiwei Zheng,Xichen Zhang,Yutian Su,Xi Zhou,Shishan Wu,Jian Shen
Graphical A new zinc-ion hybrid capacitor assembled by using a Zn@annealed ZIF-8 anode and ZIF-8 derived C cathode provides a capacity of 135.5 mAh g −1 and an energy density of 108.4 Wh kg −1 with a power density of 800 W kg −1 at 1.0 A g −1 . Zn is a promising anode for aqueous energy storage owing to it intrinsic superior properties such as large capacity, abundant reserves, low potential and safety. But, the growth of dendrites during charge and discharge leads to a decrease in reversibility. In addition, further development of zinc-ion hybrid capacitors (ZICs) is seriously challenging because of the lack of an exceptional cathode. Herein, we use ZIF-8 annealed at 500 °C (annealed ZIF-8) as a host material for stable and dendrite-free Zn anodes. Utilization of annealed ZIF-8 results in dendrite-free Zn deposition and stripping as a result of its porous construction, which contains trace Zn. Furthermore, we firstly proposed innovative N,O dual-doped carbon which was designed by the derived ZIF-8 (ZIF-8 derived C) as cathode for high-energy and power-density ZICs. The new ZIC assembled by Zn@annealed ZIF-8 anode and ZIF-8 derived C cathode provides a capacity of 135.5 mAh g −1 and an energy density of 108.4 Wh kg −1 with a power density of 800 W kg −1 at 1.0 A g −1 . In addition, it shows outstanding cycling stability of 91% capacity retention after 6000 cycles at 5.0 A g −1 . Moreover, the solid-state ZICs can drive LEDs and smart watches. This ZIC holds promise for the practical application of supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
TETRAHEDRON
·
2014
·
IF 2.817
Dazhuang Miao,Xuesong Shi,Guozhen He,Yao Tong,Zengqiang Jiang,Shiqing Han
N -(2-Chloro-phenyl)-2-halo-benzamides (halo=I/Br/Cl) as substrates were used for the one-pot synthesis of 2-arylbenzoxazole derivatives via copper-catalyzed intermolecular C–N/intramolecular C–O couplings with primary amines . This aryl amination offers clean reaction conditions and easy work-up in good yields by using CuI as catalyst, readily available 8-hydroxyquinoline as ligand, K 3 PO 4 as base, DMF as solvent.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Dezhi Yang,Qiulan Li,Sai Kumar Tammina,Zhe Gao,Yaling Yang
The construction of highly efficient nanozyme activities in a simple means is vital for the wide biological and chemical applications. Present work describes a Cu-based carbon dots (Cu-CDs) with oxidase- and peroxidase-like activity for the catalytic oxidation of o -phenylenediamine (OPD) at neutral pH. The peroxidase-like activity of Cu-CDs was finely tuned and enhanced by changing the ascorbic acid (AA) content and reduction temperature to increase the Cu + content. The oxidation of OPD was significantly accelerated by the addition of Fe 2+ ions (i.e., Cu-CDs + Fe 2+ /H 2 O 2 system) and presented a smaller K m (Michaelis constant) and a higher V max (maximum rate) than horseradish peroxidase (HRP) at the same mass concentration. The Cu-CDs with oxidase- and peroxidase-like activities could catalyze to produce the superoxide radical ( · O 2 - ) and hydroxyl radical (·OH) in the system. Interestingly, the catalytic oxidation of OPD to 2,3-diaminophenazine (DAP) could be inhibited by Cr(III) ions in Cu-CDs + Fe 2+ /H 2 O 2 system. Therefore, a new fluorescent detection strategy was developed for the detection of Cr(III) with the linear range of 0.2−100 μM, and the detection limit of 36 nM (S/N = 3). This work provides new insight into the mechanism and kinetics of low-valence copper–carbon dots peroxidase-like and Fenton co-catalyst system.
研究领域:
生物化学
·
纳米生物学
·
分析化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）