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Efficient recovery of phosphate by La-MOFs: An excellent adsorption performance and mechanism

Progress in Natural Science:Materials International 2023年第6期33卷 854-863页

作者： Yongyi Yu Jiangyan Song Ziyi Zhang Weisen Yang Wenbin Pan Shaoju Jian Jiapeng Hu Qing Luo College of Environment and Safety Engineering Fuzhou University Key Laboratory of Green Chemical Technology of Fujian Province University Fujian Provincial Key Laboratory of Eco-Industrial Green Technology Wuyi University College of Materials Xiamen University

Lanthanum-type metal-organic frameworks（La-MOFs） can be used to mitigate phosphate pollution in ***, La-MOFs was gained via the solvothermal method and its phosphate removal property was examined under various conditions, like variable initial phosphate concentration, solution p H, and co-existing ions. The material morphology, element composition, and crystal morphology of the La-MOFs was characterized using XRD,SEM, FTIR, and XPS. The phosphate removal mechanism was investigated by combining thermodynamic and kinetic analyses. The La-MOFs exhibited superior adsorption capability for surplus phosphate in water, and also had a high selectivity for phosphate in the complexed environment with some co-existing ions. Maximum adsorption was obtained at pH 4. The sorption procedure of La-MOFs aligned more with the Langmuir and pseudo-second order kinetic models, demonstrating monomolecular-layer-controlled chemisorption. And the maximum sorption capacity was 73.69 mg g-1. Electrostatic interactions and ligand exchange, which enabled the development of an La–O–P inner-sphere complexation, were identified as the primary mechanisms of phosphate removal. This research provides insights into the optimal conditions and mechanism of phosphate adsorption by La-MOFs.

关键词： La-MOFs Phosphate removal Adsorption Mechanism

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Novel quantitative structure activity relationship models for predicting hexadecane/air partition coefficients of organic compounds

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Journal of environmental Sciences 2023年第2期124卷 98-104页

作者： Ya Wang Weihao Tang Zijun Xiao Wenhao Yang Yue Peng Jingwen Chen Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Key Laboratory of Industrial Ecology and Environmental Engineering(MOE) School of Environmental Science and TechnologyDalian University of TechnologyLinggong Road 2Dalian 116024China

Predicting the logarithm of hexadecane/air partition coefficient(L)for organic compounds is crucial for understanding the environmental behavior and fate of organic compounds and developing prediction models with polyparameter linear free energy ***,two quantitative structure activity relationship(QSAR)models were developed with 1272 L values for the organic compounds by using multiple linear regression(MLR)and support vector machine(SVM)*** the basis of the OECD principles,the goodness of fit,robustness and predictive ability for the developed models were *** SVM model was first developed,and the predictive capability for the SVM model is slightly better than that for the MLR *** applicability domain(AD)of these two models has been extended to include more kinds of emerging pollutants,i.e.,oraganosilicon *** developed QSAR models can be used for predicting L values of various organic *** van derWaals interactions between the organic compound and the hexadecane have a significant effect on the L value of the *** in silico models developed in current study can provide an alternative to experimental method for high-throughput obtaining L values of organic compounds.

关键词： L value Quantitative structure-activity relationship Multiple linear regression Support vector machine Oraganosilicon compounds

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Insight into catalytic performance and reaction mechanism for toluene total oxidation over Cu-Ce supported catalyst

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Journal of environmental Sciences 2025年第3期149卷 476-487页

作者： Xuan Liang Jin Zhang Juntai Tian Zenghua Xie Yue Liu Peng Liu Daiqi Ye School of Environment and Energy South China University of TechnologyGuangzhou 510006China National Engineering Laboratory for VOCs Pollution Control Technology and Equipment Guangzhou 510006China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control South China University of TechnologyGuangzhou 510006China Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal South China University of TechnologyGuangzhou 510006China

Herein,three supported catalysts,CuO/Al_(2)O_(3),CeO_(2)/Al_(2)O_(3),and CuO-CeO_(2)/Al_(2)O_(3),were synthesized by the convenient impregnation method to reveal the effect of CeO_(2)addition on catalytic performance and reaction mechanism for toluene *** with CuO/Al_(2)O_(3),the T_(50)and T_(90)(the temperatures at 50%and 90%toluene conversion,respectively)of CuO-CeO_(2)/Al_(2)O_(3)were reduced by 33 and 39°C,respectively.N_(2)adsorptiondesorption experiment,XRD,SEM,EDS mapping,Raman,EPR,H_(2)-TPR,O_(2)-TPD,XPS,NH_(3)-TPD,Toluene-TPD,and in-situ DRIFTS were conducted to characterize these *** excellent catalytic performance of CuO-CeO_(2)/Al_(2)O_(3)could be attributed to its strong coppercerium interaction and high oxygen vacancies ***,in-situ DRIFTS proved that CuO-CeO_(2)/Al_(2)O_(3)promoted the conversion of toluene to benzoate and accelerated the deep degradation path of *** work provided valuable insights into the development of efficient and economical catalysts for volatile organic compounds.

关键词： Cu-Ce supported catalyst Copper-cerium interaction Oxygen vacancies Toluene oxidation Reaction mechanism

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Design of a Low-Energy Ion Implanter for Particle Radiation Testing of Materials in Space Application 14

Design of a Low-Energy Ion Implanter for Particle Radiation ...

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14th International Conference on reliability, Maintainability and Safety, ICRMS 2023

作者： Hao, Li Huiqi, Zheng Qiang, Yu Yuchuan, Peng Junfeng, Wang Shouqing, Huang Zhenyu, Tang Yong, Yang Qiongying, Ren Beijing Institute of Spacecraft Environment Engineering Science and Technology on Reliability and Environment Engineering Laboratory Beijing China Beijing Institute of Spacecraft Environment Engineering Beijing China

ISBN: (纸本)9798350329988

Ion implanters are widely utilized in particle radiation testing of materials within the context of space applications. Their primary purpose is to validate the reliability of materials exposed to space environment. A novel low-energy ion implanter is presently under development, featuring several distinctive attributes aimed at facilitating the production of an ion beam characterized by high uniformity, a substantial irradiation area, and sustained flux stability. The initial step involves the utilization of multi-circle arc-shaped hot cathodes to emit electrons. Subsequently, a multilayer concentric cylindrical electrode, interspersed with hot cathodes, is introduced within the ionization chamber. This configuration paves the way for the ion extraction electrode to extend into the ionization chamber. Finally, an automated adjustment method for regulating ion flux at the target stage is incorporated into the design. These enhancements collectively contribute to heightened efficiency and improved quality in particle radiation testing for materials. © 2023 IEEE.

关键词： Ionization chambers

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An epoxy-based functional coating composed of sulfonated polyaniline, graphene oxide and molybdate: Application in steel corrosion protection

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Journal of Industrial and engineering Chemistry 2025年 148卷 569-582页

作者： Lei, Yu Wang, Siyu Guo, Ruiguang Li, Zhihua Zhu, Weihuang Key Laboratory of Northwest Water Resources Environment and Ecology Ministry of Education Xi'an University of Architecture and Technology Xi'an710055 China Xi'an Key Laboratory of Intelligent Equipment Technology for Environmental Engineering Xi'an University of Architecture and Technology Xi'an710055 China

This study presented an epoxy (EP)-based composite (SPANI/GO/MO@EP) coating designed for steel corrosion protection. The coating, incorporating sulfonated polyaniline (SPANI), graphene oxide (GO), and molybdate (MO), exhibited self-healing and superior anti-corrosion properties. Experimental results showed that the charge transfer resistance (Rct) of the SPANI/GO/MO@EP coating could reach 1.65 × 1010 Ω cm2, which was 2.43 times higher than that of the pristine EP coating, highlighting the enhanced corrosion resistance. Self-healing tests over 72 h showed the fluctuations of Rct value was less than 27 %, confirming the sustained corrosion inhibition. The SPANI/GO/MO@EP coating also exhibited improved hydrophobicity, with enhanced water contact angle (WCA) at 92.31°, correspondingly, the moisture absorption of SPANI/GO/MO@EP coating decreased significantly, limiting the moisture absorption content to only 0.02 % of its mass. Acetic acid salt spray tests confirmed that the SPANI/GO/MO@EP coating significantly reduced corrosion products, delamination, and blister formation. The SPANI/GO/MO@EP coating had the ability to reduce lattice defects in GO and form a protective insoluble film with MO and iron ions which further strengthens the long-term corrosion resistance of Q235 steel. © 2025 The Korean Society of Industrial and engineering Chemistry

关键词： Steel corrosion

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Molecular Dynamics Simulation on the Interaction of R290 and POE Lubricants

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Journal of Thermal Science 2025年第2期34卷 555-566页

作者： XING Meibo DENG Qiao ZHANG Cancan ZHANG Ning Beijing Engineering Research Center of Sustainable Energy and Buildings School of Environment and Energy EngineeringBeijing University of Civil Engineering and ArchitectureBeijing100044China MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation Beijing Key Laboratory of Heat Transfer and Energy ConversionBeijing University of TechnologyBeijing100124China

In this work,the interactions between the environmentally friendly refrigerant propane(R290)and Polyol Ester(POE)including solubility parameters,diffusion coefficients,binding energies,and radial distribution functions were investigated using molecular dynamics(MD).Specifically,the effect of chain length of Pentaerythritol esters(PEC)as the representative component of POE on the interaction of PEC/R290 was *** solubility parameters difference exhibits the PEC and R290 are more easily miscible as increasing chain length of PEC,and there is plateau as the chain lengths is above 8 *** addition,it was also found that solubility parameters are various for the isomers due to the different spatial ***,the presence of PEC would reduce the diffusion coefficient of R290 in the mixed system of R290/lubricant with the reduction of20%on *** is also found that van der Waals forces are dominant in the R290/PEC *** PEC molecules start to be bound to the H atoms of R290 at the first neighbor shell layer with a radius of 0.219 ***,the molecular simulation model of POE22 considering various actual components was innovatively *** results showed that the solubility of R290 with typical POE lubricant is affected by the composition and proportions of based oil and additives.

关键词： solubility molecular dynamics simulation R290 POE

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A colorimetric nanobiosensor with enhanced sensitivity for detection of lead(Ⅱ)in real-water samples via an adeninecytosine mismatched DNAzyme

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Frontiers of environmental Science & engineering 2024年第12期18卷 167-177页

作者： Jinchuan Liu Hang Yang Huanxing Li Jiancheng Wang Xiaohong Zhou College of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China State Key Joint Laboratory of ESPC School of EnvironmentTsinghua UniversityBeijing 100084China

Facile and ultrasensitive detection of Pb^(2+)in water for remote or resource-limited environments remains ***-based colorimetric nanobiosensors have been extensively studied to regulate the assembly of functionalized gold nanoparticles(AuNPs).However,these nanobiosensors have been criticized for their low sensitivity owing to the difficulty of dissociating DNAzyme embedded in AuNP *** address this issue,we rationally designed a DNAzyme by introducing an adenine-cytosine(A-C)mismatch to strengthen the disassembly of DNAzyme-linked *** proof of concept,a“turn on”colorimetric nanobiosensor integrated with mismatched DNAzyme and functionalized AuNPs was first developed for Pb^(2+)*** the optimal detection conditions,the obtained typical calibration curve shows a detection limit of 8.6 nmol/L,with an approximately 11-fold sensitivity improvement in Pb^(2+)detection compared with unmismatched DNAzyme,and a linear response range from 10 to 300 nmol/*** nanobiosensor demonstrated robust selectivity and satisfactory recovery rates between 86.5%and 106.4%for Pb^(2+)in spiked environmental water ***,the detection process is user-friendly and can be completed within 30 min,requiring only a simple water sample addition *** the extensive applications of DNAzyme in conjunction with nanoparticles,this study provides a valuable reference for designing other DNAzyme-powered nanoparticle assemblies in biosensing systems.

关键词： Trace lead(Ⅱ)ions Modified mismatched DNAzyme Gold nanoparticles Colorimetric nanobiosensor environmental water samples

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Bifunctional core–shell co-catalyst for boosting photocatalytic CO_(2) reduction to CH_(4)

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Nano Research 2024年第3期17卷 1259-1266页

作者： Fangxu Dai Mingming Zhang Jishu Han Zhenjiang Li Shouhua Feng Jun Xing Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyShandong Engineering Research Center for Marine Environment Corrosion and Safety ProtectionQingdao 266042China

Solar-light-driven CO_(2) reduction CO to CH_(4) and C2H6 is a complex process involving multiple elementary reactions and energy ***,achieving high CH_(4) activity and selectivity remains a significant ***,we integrate bifunctional Cu2O and Cu-MOF(MOF=metal-organic framework)core–shell co-catalysts(Cu2O@Cu-MOF)with semiconductor TiO_(2).Experiments and theoretical calculations demonstrate that Cu2O(Cu+facilitates charge separation)and Cu-MOF(Cu2+improves the CO_(2) adsorption and activation)in the core–shell structure have a synergistic effect on photocatalytic CO_(2) reduction,reducing the formation barrier of the key intermediate*COOH and**** photocatalyst exhibits high CH_(4) yield(366.0μmol·g^(-1)·h^(-1)),efficient electron transfer(3283μmol·g^(-1)·h^(-1))and hydrocarbon selectivity(95.5%),which represents the highest activity of Cu-MOF-based catalysts in photocatalytic CO_(2) reduction *** work provides a strategy for designing efficient photocatalysts from the perspective of precise regulation of components.

关键词： bifunctional co-catalyst core–shell photocatalytic CO_(2)reduction

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Regulate electric double layer for one-step synthesize and modulate the morphology of(oxy)hydroxides

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Nano Research 2024年第5期17卷 3675-3683页

作者： Jiaxin Liu Yue Shi Yanli Gu Zheng Lv Liang Zhao Yu Yang Tianrong Zhan Jianping Lai Lei Wang State Key Laboratory Base of Eco-Chemical Engineering International Science and Technology Cooperation Base of Eco-chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

FeOOH have received considerable attention due to their natural abundance and *** the significant progress achieved,the one-step synthesis of integrated FeOOH is still a major ***,the current research on FeOOH catalyst still suffers from the unclear mechanism of controlling ***,density functional theory(DFT)calculations and X-ray photoelectron spectroscopy(XPS)demonstrated the strong electron-capturing and hydrogen absorption ability of Co in FeOOH,which further promotes the formation and stabilization of *** used a one-step electrodeposition method to synthesize Co introduced FeOOH integrated electrocatalyst and propose to introduce ions with different valence states to regulate the morphology of FeOOH by precise modulation of electric double layer(EDL)composition and *** prepared Co-FeOOH-K^(+)has a larger electrochemically active surface area(ECSA)(325 cm^(2))and turnover frequency(TOF)value(0.75 s^(-1)).In the electrochemical experiments of an alkaline anion exchange membrane electrolyzer,Co-FeOOH-K^(+)shows better oxygen evolution performance than commercial RuO_(2) under industrial production conditions and has good industrial application prospects.

关键词： integrated(oxy)hydroxides electrodeposition electric double layer(EDL) oxygen evolution reaction(OER) morphology regulation

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Long-Chain Alkenones in the South Yellow Sea Sediments and Their Indicative Significance for Haptophytes Species

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Journal of Ocean University of China 2024年第5期23卷 1287-1296页

作者： XU Yakun YANG Xinxin XIAO Rui XING Lei Key Laboratory of Marine Chemistry Theory and Engineering Technology Ministry of EducationOcean University of ChinaQingdao 266100China Laboratory of Marine Ecology and Environment Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

Long-chain alkenones(LCAs)have been widely used as important biomarkers in palaeoceanographic ***,the commonly used LCAs proxies are mainly based on C_(37) alkenones,and it is still lack of the studies about the distribution and in-dications of LCAs with different chain lengths other than C_(37) ***,the composition and distribution of LCAs were ana-lyzed in surface sediments from the southern Yellow Sea(SYS)and a sedimentary core(A02-C)from the central Yellow Sea(YS)mud *** results showed that C_(37),C_(38) and C_(39) alkenones were the major LCAs in surface sediments of the SYS,and the relative contents of C_(38:2)Et,C_(37:2)Me,C_(37:3)Me,C_(38:2)Me,C_(38:3)Et,C_(38:3)Me,C_(39:2)Et and C_(39:3)Et were 18.3%-59.8%,22.6%-41.2%,7.4%-23.0%,6.6%-15.4%,3.8%-13.3%,3.6%-8.7%,2.8%-6.0% and 0.7%-3.0%,*** the relationships of U_(38Me)^(K)-U_(38Et)^(K) and U_(37)^(K')-U_(38Et)^(K) indicate that LCAs are mainly derived from Emiliania huxleyi(***).High ratios of total C_(37) alkenones to total C_(38) alkenones(K_(37)/K_(38))(1-1.2)were found in the central SYS,corresponding to the relatively high abundance of ***;while low ratios of K_(37)/K_(38)(0.7-0.9)were observed at nearshore area of the SYS where Gephyrocapsa oceanica(***)has rela-tively high *** spatial distribution of K_(37)/K_(38) ratio is also consistent with that of coccolithophores nannofossil in the *** addition,K_(37)/K_(38) ratio in core A02-C varied from 0.7 to 1.1 with a gradual decreasing trend during the past 5.5 *** suggests that the relative abundance of *** decreased gradually,caused by the changes in the Yellow Sea Warm Current(YSWC)and the East Asian Winter Monsoon(EAWM)during this period.

关键词： alkenones southern Yellow Sea sediment Yellow Sea Warm Current

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