Nano Energy
·
2024
·
IF 16.8
Zuheng Jin,Xiao Zheng,Zhihong Zhu,Chuan Jiang,Sha Wu,Changzheng Hu,Laijun Liu,Liang Fang,Zhenxiang Cheng
Considering advanced oxidation techniques offer new opportunities for microbial degradation and inactivation, in this study, Z-type heterojunctions of Ba 1.4 Sr 3.6 NdNb 7 Ti 3 O 30 -N 2 /g-C 3 N 4 (BN 2 /CN) were successfully prepared using a solid-phase method and explored for their potential applications in tribocatalytic bactericidal inhibition. These results demonstrate that BN 2 /CN exhibits excellent inhibitory and inactivating effects on E. coli under tribocatalytic conditions. The UV–visible spectrum showed a gradual decrease in the survival rate of E. coli with the increase of tribocatalysis time, reaching an inactivation effect of 91% after 1 h, while fluorescence staining also confirmed that E. coli were essentially eliminated, with hardly any surviving bacteria observed under a laser confocal microscope . Hence, this study presents a novel catalytic approach for sterilization. Moreover, inhibition experiments demonstrated that the BN 2 /CN catalyst did not inhibit the growth of E. coli, tribocatalysis played a crucial role in the disinfection and sterilization processes . The inactivation of bacteria by BN 2 /CN catalyst was still above 90% after multiple cycles of sterilization experiments. Finally, we demonstrated that the production of •OH and •O 2 - during tribocatalysis is key to the inactivation of E. coli, thus achieving the desired effect of tribocatalytic sterilization.
研究领域:
催化
·
材料科学
·
微生物学
·
环境科学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
LiWei Yang,YanYan Jia,YaQi Peng,Peng Zhou,Dian Yu,ChuanLiang Zhao,JiaoJie He,ChuanLang Zhan,Bo Lai
Removal of pharmaceutical and personal care products from wastewater is very important in water treatment process. Combining photocatalysis with persulfate (PS) could be a good solvent for this problem. Novel perylene diimide derivative (EHPDI) was designed and synthesized. Furthermore, self-assembled EHPDI/TiO 2 composite photocatalyst (EPT) was prepared and applied in activating persulfate (PS) under visible light to enhance the photodegradation of pollutants. The presence of the alkyl side chain 2-ethylhexyl optimizes the self-assembly process, enabling the composite material to achieve high performance under low EHPDI loading. Various methods were used to detect the physical and chemical characteristics of EPT. Carbamazepine (CBZ) was chosen to be the model pollutant to study the removal efficiency of EPT/PS system under visible light. Within 30 min, 5.0 mg/L CBZ could be almost completely degraded, and the removal ratio of TOC was 75.2% within 60 min. The SO 4 – , OH, O 2 – , 1 O 2 , and h + were proved to be involved in the removal of CBZ by EPR and quenching experiments. Then, other typical pollutants were degraded by this EPT/PS system, demonstrating this system is suitable for degrading different pollutants. Besides, the degradation paths of CBZ were proposed by HPLC/MS. Finally, the EPT showed excellent recyclability and stability.
研究领域:
环境科学
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水处理
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光催化
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材料科学
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产品关联
DOI
PubMed
高影响因子
Nature Catalysis
·
2019
·Vol. 2
·期 11
·1035-1044
·
IF 0
Qiao Yu,Jiang Kezhu,Deng Han,Zhou Haoshen
Li–O 2 batteries have received considerable attention owing to their high theoretical gravimetric energy densities. However, the sluggish kinetic barrier between gaseous O 2 and solid products leads to severe polarized overpotenial. Besides, the gas-open cell architecture and cumbrous O 2 storage accessories bring additional burdens on practical application. Here, by pre-embedding Li 2 O nanoparticles into an iridium–graphene catalytic host, we confine the O 2 -free reversible Li 2 O/Li 2 O 2 interconversion within a sealed cell environment. After rationally controlling the depth of charge, the O 2 /superoxo-free charge capacity can be extended to 400 mAh g –1 (based on the entire cathodic loading mass), with only 0.12 V round-trip overpotential. Ultrastable rechargeability can be achieved for over 2,000 cycles with 99.5% coulombic efficiency. Moreover, matched with a silicon anode, the full-cell output gravimetric energy density can reach nearly 600 Wh kg –1 (based on the loading mass of both electrodes). This work shows that reversible oxide–peroxide conversion can be utilized for the development of high-energy-density sealed battery technologies.
研究领域:
材料科学
·
电化学
·
能源存储
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产品关联
DOI
Journal of Natural Medicines
·
2020
·Vol. 75
·期 1
·129-141
·
IF 2.055
An Meng-Fei,Wang Ming-Yue,Shen Chang,Sun Ze-Rui,Zhao Yun-Li,Wang Xuan-Jun,Sheng Jun
Abstract Isoorientin (ISO), a natural flavonoid compound, has been identified in several plants and its biological activity is determined and the study on lowering uric acid has not been reported. In view of the current status of treatment of hyperuricemia, we evaluated the hypouricemic effects of ISO in vivo and in vitro, and explored the underlying mechanisms. Yeast extract-induced hyperuricemia animal model as well as hypoxanthine and xanthine oxidase (XOD) co-induced high uric acid L-O2 cell model and enzymatic experiments in vitro were selected. The XOD activity and uric acid (UA) level were inhibited after the treatment of ISO in vitro and in vivo. Furthermore, serum creatinine (CRE) and blood urea nitrogen (BUN) levels were also significantly reduced and liver damage was recovered in pathological histology after the ISO administration in hyperuricemia animal model. The results of mechanism illustrated that protein expressions such as XOD, toll-like receptor 4 (TLR4), cathepsin B (CTSB), NLRP3, and its downstream caspase-1 as well as interleukin-18 (IL-18) were markedly downregulated by ISO intervention in vitro and in vivo. Our results suggest that ISO exerts a urate-lowering effect through inhibiting XOD activity and regulating TLR4-NLRP3 inflammasome signal pathway, thus representing a promising candidate therapeutic agent for hyperuricemia. Graphic abstract Both animal models and in vitro experiments suggested that ISO may effectively lower uric acid produce. The mechanism might be the inhibition of XOD activity and NLRP3 inflammasome of upregulation.
研究领域:
药理学
·
生物化学
·
分子生物学
·
医学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuxuan He,Jin Qian,Peifang Wang,Jie Wu,Bianhe Lu,Sijing Tang,Pan Gao
The nanocomposite of MoS 2 embedded manganese ferrite doped perovskite (SrCoO 3 /MnFe 2 O 4 /MoS 2 , abbreviated as SMM) was successfully synthesized for peroxymonosulfate (PMS) activation under visible-light. It was optimized that the SMM-3 (mass ratio of MoS 2 modified nanocomposite was 0.3) exhibited excellent catalytic performance to activate PMS for levofloxacin (LVF) degradation, with the degradation efficiency of 95.1% in 20 min. Besides, SMM-3 was able to efficiently degrade LVF under real water matrix. The quenching experiments and electron paramagnetic resonance (EPR) analysis revealed that SO 4 •- and HO • played a dominant role in reaction. Due to the photocatalytic property of nanocomposites, the visible light could excite electrons to react with oxygen and form O 2 •- , which further reacted with HO • to produce 1 O 2 . In the reaction process, the rapid redox cycle of metal ions (including Co, Mn, Fe and Mo) boosted the activation of PMS and promoted the degradation of LVF in a short time. The Density functional theory (DFT) calculation and LC-MS/MS further revealed that oxidation of piperazine ring, decarboxylation and defluorination processes were the main LVF degradation pathways. Finally, the toxicity analysis based on Toxicity Estimation Software Tool (T.E.S.T) verified the ecological risks of transformation residues.
研究领域:
环境科学
·
材料科学
·
化学工程
·
光化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Hao Liu,Siqing Cheng,Jianjun Chen,Xiaoping Chen,Shangchao Xiong,Fang Huang,Houfeng Liu,Junhua Li,Chuanzhi Sun
Mitigating industrial nitrous oxide (N2O) emissions is critical for climate action, yet developing efficient low-temperature N2O decomposition catalysts under O2-containing conditions remains challenging. The weak oxygen–support interaction leads to unsatisfactory N2O decomposition performance in the supported Co3O4/CeO2 catalyst. This study aims to enhance the electronic oxide–support interaction in the Co3O4/CeO2 catalyst through Zn doping, thereby improving its catalytic performance for N2O decomposition under O2-rich conditions. The results demonstrate that, in the presence of 5% O2, the activation energy of the catalyst sharply decreases from 117.5 to 60.4 kJ·mol–1 after Zn doping (Co2.4Zn0.6O4/CeO2). Additionally, the doped catalyst exhibits strong durability to the O2 + H2O + NOx impurity gas components. Advanced spectral characterization and density functional theory calculations reveal that Zn doping modulates the geometry and electronic structure of active cobalt sites, optimizing the adsorption and activation capabilities of N2O molecules. This study elucidates the mechanism of N2O decomposition over the catalysts and establishes a clear structure–activity relationship between the atomic-scale configuration of active sites and their performance. These findings provide critical insights for designing efficient supported oxide catalysts through targeted doping strategies and offer new perspectives for developing highly efficient and low-energy N2O decomposition catalysts.
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产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2020
·
IF 3.687
Hai-Min Shen,Lei Liu,Bei Qi,Meng-Yun Hu,Hong-Liang Ye,Yuan-Bin She
Non-solvent and non-additive oxidation of secondary benzylic C–H bonds to aromatic ketones utilizing simple metalloporphyrins as catalysts and O 2 was investigated systematically. Based on systematical studies on reaction parameters, such as the structures of porphyrins, the types of central metals, the amount of catalyst, the pressure of oxygen, and the temperature, most aromatics with secondary benzylic C–H had been converted efficiently and selectively to their corresponding aromatic ketones catalyzed by the optimized metalloporphyrin catalyst T(2,3,6-triCl)PPCo. And the selectivity towards aromatic ketones reached up to 80 %–95 % with acceptable conversions in lower catalyst-loading (2.4 × 10 −3 %, mol/mol). The highest selectivity was achieved for substrate 1,2,3,4-tetrahydronaphthalene with the selectivity of 95.0 % in the conversion of 46.3 %. The superior catalytic performance of T(2,3,6-triCl)PPCo could be mainly ascribed to its excellent plane structure, superior ability for electron transfer and low positive charge around the central metal. All of above properties promoted the formation of catalytic active species high-valence cobalt-oxo complexes, and facilitated the approach of substrates to the catalytic active centers. This work presented an optimized balance among higher selectivity, milder conditions, lower catalyst-loading, and simpler catalysts compared with current documents, which was not only an efficient, practical and significant strategy to functionalize the widely available aromatics possessing secondary benzylic C H with high efficiency and selectivity under milder conditions, but also an important instance in the effective functionalization and utilization of other C H bonds employing optimized catalytic systems based on metalloporphyrins.
研究领域:
有机化学
·
催化化学
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DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2015
·
IF 1.56
Qunxing Huang,Xu Cai,Moussa Mallaye Alhadj Mallah,Yong Chi,Jianhua Yan
The high concentration of heavy metals in solid wastes may cause serious pollution during thermal treatment. We have investigated, theoretically and experimentally, the effects of several important flue gas species and mineral sorbents on the partitioning behaviour of four major heavy metals (cadmium, lead, zinc and copper) which are often present in municipal solid waste (MSW). Their concentrations in bottom ash, fly ash and flue gas were quantified when model MSW samples were treated thermally under different conditions. The evaporation ratio of the four metals, excluding Cu, increased with decreasing oxygen concentration. The presence of HCl promotes heavy metal evaporation by preventing the formation of stable metallic species, especially for Zn (evaporation of more than 20%). An increase in oxygen concentration has a negative influence on the effect of HCl. In the presence of SO2, Cd and Pb exhibited a higher evaporation ratio, while Zn and Cu were insensitive to the change. SO2 also inhibits Cd vaporization in an oxidative atmosphere. The effect of NH3 on reducing the metal volatilization rate was established indirectly. Calcium oxide addition enhances metal evaporation except for that of Zn (which shows a decrease of 38%). Although desulphurization by calcium injection decreases the volume of acid gas, calcium affects heavy metal pollution control adversely. The presence or addition of SiO2- or Al2O3-containing minerals can lead to the formation of stable metallic salts. This may favour the control of Cd, Pb, Zn and Cu volatilization up to 13%, 50%, 17.5% and 19%, respectively.
研究领域:
环境科学
·
废物处理
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zining Man,Hao Tian,Xingbao Zhu,Zhe Lü
One experiment in this study utilized the plasticizer succinonitrile and lithium salt LiTFSI to directly create an ionic liquid electrolyte, with an artificial solid electrolyte interface layer generated using fluoroethylene carbonate. The typical electrolyte exhibited an ionic conductivity of 10–3 S cm–1 at room temperature and an electrochemical window of up to 5.3 V based on electrochemical impedance spectroscopy and linear sweep voltammetry tests. This electrolyte system effectively addresses the issues of decomposition and deterioration of traditional organic electrolytes in Li–O2 batteries at high voltages (over 4.5 V), as well as the problem of direct oxidation of the anode caused by oxygen shuttling, thereby greatly improving the lifespan of Li–O2 batteries. Additionally, the electrolyte’s low volatility and flame retardancy allowed for reliable operation of the battery in an air atmosphere. A Li–O2 battery assembled with the novel electrolyte was capable of cycling in a pure oxygen atmosphere for more than 1000 cycles at a capacity density of 200 mA h g–1 and over 150 cycles at 500 mA h g–1. Even when connected to ambient air without an additional oxygen selective membrane (OSM), the battery can still cycle continuously for more than 350 and 150 cycles at these two kinds of capacity density.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Kai Li,Junqi Cai,Yue Tao,Yunhe Xing,Zuchao Zhu,Zhiqiang Lu,Xuming Zhang
The direct conversion of methane into the value-added chemical methanol using molecular oxygen was investigated via plasma catalysis under mild condition. An efficient synergistic effect between plasma and catalyst was achieved using an oxygen vacancy-rich ZnO/Al 2 O 3 catalyst. A high methanol selectivity of 48.5 % and a high synergy factor of 2.1 could be achieved simultaneously over ZnO/Al 2 O 3 R300 catalyst. The presence of oxygen vacancies played a crucial role in methanol formation. A close relationship between oxygen vacancy content and methanol selectivity was established. In situ DRIFT and optical emission spectra were employed to identify key intermediates, and a plausible reaction mechanism was proposed. The CH 3 and CH 3 O species were the key intermediates on the catalyst surface. The oxygen vacancy could efficiently adsorb the O radicals and accelerate the formation of CH 3 O species. This work offers insights into the rational engineering of efficient catalyst for plasma catalysis process.
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
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Huiting Lin,Yichang Ma,Xiaocan Wang,Guiqin Yi,Aimei Zhu,Qinglin Liu,Qiugen Zhang
Ether-free proton exchange membranes (PEMs) based on aromatic polymers are considered as potential alternatives to perfluorosulfonic acid (PFSA) PEMs due to their low cost, less reactant crossing, exceptional chemical stability and outstanding thermal stability. Herein, a series of high-performance sulfonated poly(biphenyl alkylene) (BPSA-PT- x ) membranes with full carbon chain backbones were synthesized to investigate the effect of different ratios of hydrophobic components on membrane properties. Among the prepared membranes, the BPSA-PT-10 % PEM with the highest proton conductivity (311 mS cm -1 at 80 °C water) possessed excellent dimensional stability (in-plane swelling rate ≤19.7 %, through-plane swelling rate ≤24.9 %), mechanical properties (elongation at break: 89.8 % in wet state), thermal stability (glass transition temperature >450 °C) and low H 2 crossover (1.80 mA cm -2 ). Further, the assembled H 2 /O 2 fuel cell based on BPSA-PT-10 % PEM exhibited competitive performance with a peak power density of 2.62 W cm -2 . The developed poly(biphenyl alkylene)-based PEMs should have potential applications in hydrogen energy field.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yingying Zhang,Qiang Huang,Ruoting Wang,Xinjie Du,Yu Yu,Zhe Chen
Modulating the coordination environment of single-atom catalysts (SACs) and designing architectures to maximize the exposure of active sites are pivotal strategies for enhancing peroxymonosulfate (PMS) activation. The fabrication of single-atom‑iron catalysts on support with particular coordination is essential but still remains challenge. Herein, we proposed the construction of single-atom‑iron embedded in graphitic carbon nitride nanosheets (SA-Fe@C 3 N 4 ) catalyst. The layer-confined synthesis strategy realized the loading of single-atom irons and ultrathin C 3 N 4 nanosheet formation in the interlayer of layered template RUB-15. XANES analysis corroborated that the isolated iron atoms are coordinated with three nitrogen and one oxygen atoms (Fe-N 3 O 1 ). Notably, the single iron atoms within the SA-Fe@C 3 N 4 matrix serve as the predominant active sites for PMS activation. The catalyst exhibited exceptional activity for the degradation of sulfamethoxazole (SMX), achieving a mass-normalized rate constant ( k Fe ) of 1.54 × 10 5 min −1 mol −1 with high selectivity toward 1 O 2 /•O 2 − .Theoretical calculations revealed that the Fe-N 3 O 1 moiety accelerated the PMS adsorption and reduced energy barriers for the activation of PMS, thus produce key *O intermediate SO 5 •- and form 1 O 2 /•O 2 − with nearly 100% selectivity. This study supplied a simple avenue to fabricate single-atom‑iron on C 3 N 4 with regulated coordination for wastewater treatment.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）