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Synthesis ofδ-MnO_(2)via ozonation routine for low temperature formaldehyde removal

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Journal of Environmental Sciences 2025年第1期147卷 642-651页

作者： Guijun Fan Yacong Guo Shaohua Chai Le Zhang jian Guan Guojun Ma Ning Han Yunfa chen State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China College of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Science and Technology on Particle Materials Institute of Process EngineeringChinese Academy of SciencesBeijing 361021China Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Petrochemical Engineering&Environment Zhejiang Ocean UniversityZhoushan 316022China

Nowadays,it is still a challenge to prepared high efficiency and low cost formaldehyde(HCHO)removal catalysts in order to tackle the long-living indoor air ***,δ-MnO_(2)is successfully synthesized by a facile ozonation strategy,where Mn^(2+)is oxidized by ozone(O_(3))bubble in an alkaline *** presents one of the best catalytic properties with a low 100%conversion temperature of 85℃for 50 ppm of HCHO under a GHSV of 48,000 mL/(g·hr).As a comparison,more than 6 times far longer oxidation time is needed if O3 is replaced by O_(2).Characterizations show that ozonation process generates a different intermediate of tetragonalβ-HMnO_(2),which would favor the quick transformation into the final productδ-MnO_(2),as compared with the relatively more thermodynamically stable monoclinicγ-HMnO_(2)in the O_(2)***,HCHO is found to be decomposed into CO_(2)via formate,dioxymethylene and carbonate species as identified by room temperature insitu diffuse reflectance infrared fourier transform *** these results show great potency of this facile ozonation routine for the highly activeδ-MnO_(2)synthesis in order to remove the HCHO contamination.

关键词： δ-MnO_(2) Ozone oxidation HCHO oxidation In-situ DRIFTS

Nanoplastics and nano-ZnO facilitate Cd accumulation in zebrafish larvae via a distinct pathway: Revelation by LA-ICP-MS imaging

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Chinese Chemical Letters 2025年第2期36卷 436-440页

作者： Pengyu chen Beibei chen Man He Yuxi Zhou Lei Lei jian Han Bingsheng Zhou Ligang Hu Bin Hu Department of Chemistry Wuhan University State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

The interaction between nanoparticles （NPs） and pollutants affects their bioavailability and ***,the processes by which NPs and pollutants change in vivo have rarely been ***,using laser ablation-inductively coupled plasma-mass spectrometry （LA-ICP–MS）,we found that both nanoplastics and ZnO NPs caused more Cd to accumulate in zebrafish larvae,but with distinct *** could adsorb Cd2+and transfer it into the larvae through the“Trojan horse”*** coexposure of nanoplastics and Cd2+caused Cd to accumulate in the abdomen where the nanoplastics were located without dissociation,showing a lower toxic effect than Cd2+exposure *** NPs weakly adsorbed Cd2+,but they increased the Zn and Cd contents in larvae by enhancing the expression of metal *** coexposure of ZnO and Cd2+evenly distributed Cd in the larvae,revealing a more severe toxic effect than Cd2+exposure *** results demonstrated the changing bioavailability and toxicity of Cd induced by different *** also shows the vital role LA-ICP-MS plays in revealing the relationship between toxicity and *** addition,the long-term effect of bioavailability on heavy metal toxicity and nanosafety deserves further investigation.

关键词： Cadmium Combined effect LA-ICP-MS Nanoplastics Zebrafish larvae ZnO nanoparticles

Influence Factors on the Radiation Temperature Measurement Accuracy of Turbine Blades

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Journal of Thermal Science 2025年第02期 510-523页

作者： LI Xunfeng YAN Hao ZHAO Shu'nan chenG Keyong chen Junlin huai Xiulan Institute of Engineering Thermophysics Chinese Academy of Sciences School of Engineering Science University of the Chinese Academy of Sciences Nanjing Institute of Future Energy System

Backward Monte Carlo method of the complicated and exact three-dimensional turbine with the spectral emission and reflection characteristics of the turbine blades materials and the spectral absorption and emission characteristics of combustion gas is *** factors affecting the accuracy of the radiation temperature measurement are *** results show that reducing the distance from the probe to the target surface can reduce the effect of the environment on the measurement *** the temperature and emissivity of the target surface can improve the measurement *** reflection characteristics of the surfaces have little influence on the radiation temperature measurement,so the blades can be considered as diffuse reflectors in order to improve the calculation *** temperature measurement accuracy decreases rapidly as the temperature of the combustion gas *** temperature measurement accuracy decreases with the increase of total gas pressure and H2O *** measuring the temperature of rotating blades,the apparent emissivity of the target surface is inversely proportional to the measurement accuracy.

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Spin freezing induced giant exchange bias in a doped Hund's metal

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 167-174页

作者： Shunjiao Li Dan Zhao jian Li Baolei Kang Min Shan Yanbing Zhou Xuyang Li Tao Wu Xianhui chen Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Strongly Coupled Quantum Matter Physics Department of PhysicsUniversity of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Superconducting Electronics(CENSE) Shanghai 200050China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

Exchange bias(EB)is a fundamental phenomenon in widespread information ***,a comprehensive understanding of its microscopic origin remains a great *** key issue in the debate is the role of frustration and disorder in the EB mechanism,which motivates the exploration of the EB effect in spin glass(SG)***,in the SG state of Crdoped Hund's metal CsFe_(2)As_(2),we discover a giant EB effect with a maximum bias field of -2 T,which is almost two orders of magnitude larger than that of traditional alloy *** results indicate that the giant EB effect should originate from the exchange interactions at the natural boundaries between the tunable ferromagnetic-like(FM)regions around Cr dopants and the SG matrix,via which the FM spins are strongly pinned by the frozen spins in the SG *** addition,the temperaturedependent and cooling-field-dependent EB behaviors could be interpreted well by the SG model with frustrated FM/SG boundaries,which provides an intuitive and explicit understanding of the impact of glassy parameters on the EB *** these results suggest that the correlated metals are promising directions for exploring the EB effect in the SG state.

关键词： Hund's metal spin glass exchange bias iron-based superconductor

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Transforming waste particles into valuable adsorbents via amyloid-mediated molecular engineering

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Science China Chemistry 2025年第1期68卷 317-328页

作者： Qingmin Yang jian Zhao Yujia Zhang Xingyu Zhou Hao Ren Bowen Hu Zhongli Lei Lixin chen Peng Yang Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China School of Material and Chemical Engineering Bengbu UniversityBengbu 233030China Anhui Provincial Engineering Laboratory of Silicon-Based Materials Bengbu 233030China Xi’an Key Laboratory of Polymeric Soft Matter School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China International Joint Research Center on Functional Fiber and Soft Smart Textile School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129China

The high-value utilization of industrial solid waste using a facile and eco-friendly process is of great interest and significance in reducing environmental pollution and developing a green circular ***,we propose an amyloid-mediated molecular engineering strategy to transform particulate waste into valuable adsorbents for metal *** method has the advantage of aqueous solution fabrication under mild conditions without the use of high-temperature hydrothermal methods and toxic chemical ***-mediated molecular engineering manipulates the phase transition of bovine serum albumin(BSA)on particulate waste surfaces,resulting in a remarkable~3.1 times improvement in the adsorption capacity of fly ash,a typical industrial solid waste for gold ions after modification with the phase-transitioned BSA(PTB).The resultant adsorption ability was 69–1,980 times higher than those of conventional and emerging adsorbent materials such as ion exchange resins,activated carbon(AC),covalent organic frameworks(COFs),and metal-organic frameworks(MOFs).We further demonstrated the application of our PTB-modified materials in the recovery of precious metals from low-grade gold ore and electronic waste ***,this strategy could increase the value of waste materials nearly 27 *** addition,this method is generally extendable to other conventional industrial adsorbents such as resin,clay,and Al_(2)O_(3),and enhances their adsorption capabilities at least ***,this work provides a simple and green approach for improving the adsorption performance of solid particles,and is expected to develop into a universal strategy for transforming waste particles into high-value-added products.

关键词： amyloid-like protein aggregates surface engineering fly ash solid waste adsorption

New Potential Barite Reference Materials for LA-MC-ICP-MS Sulfur Isotope Analysis with Application to Hydrothermal Barite in the Huayangchuan Deposit,Western China

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Journal of Earth Science 2025年第1期36卷 1-10页

作者： Jiali Fu Xinqian He Zhaochu Hu Shuo Yin jian Ma Kaiyun chen Wen Zhang National Key Laboratory of Uranium Resource Exploration-Mining andNuclear Remote Sensing East China UniversityofTechnologyNanchang 330013China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China School of Earth Sciences East China University of TechnologyNanchang 330013China State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430078China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China

Sulfur isotopes of S-bearing materials are powerful tools to trace various geological processes and sulfur sources in earth sciences,especially in ore deposits where sulfide-sulfate pair coprecipitates ***,in-situ S isotope determination of barite is challenging without natural matrix-matched reference *** this study,we present two natural barite reference materials(1-YS and 294-YS)for in-situ sulfur isotopic *** LA-MC-ICP-MS laboratories were utilized to test theδ34S micron-scale homogeneity of 1-YS and 294-YS barites that have 2s repeatabilities of better than±0.45‰and±0.41‰,***,the in-situ analysis results are consistent with the results of the bulk analysis by GS-IRMS within *** grand meanδ~(34)S values of 1-YS(13.37‰±0.42‰,2s)and 294-YS(14.38‰±0.44‰,2s)are the final recommended values obtained from four independent *** the results confirm the suitability of 1-YS and 294-YS barite used as calibration materials with respect to in-situ S isotopic ***,the new developed barite reference materials were used as matrix-matched standard to calibrate the barite samples from the Huayangchuan carbonatite-hosted U-polymetallic deposit(Qinling orogenic belt,western China)to obtainδ34S *** the temperaturedependentδ34S fractionation of barite-pyrite pair,we calculate the formation temperature of barite(i.e.,506 to 537°C)and theδ34S value of mineralizing fluid(i.e.,-7.11‰to-7.59‰)in the Huayangchuan *** results indicate an involvement of sedimentary sulfur,presumably acting as a potential uranium source(e.g.,upper crustal materials)for the giant Huayangchuan deposit.

关键词： LA-MC-ICP-MS S isotope reference material barite geothermometry

Influence of heat treatment on microstructure of a newβ-solidifyingγ-TiAl alloy

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Journal of Iron and Steel Research International 2025年第1期32卷 239-248页

作者： Li Quan Xiao-bing Li Peng Xue Jun-jie Hao Kun Qian Bo chen jian-zhong Li Kui Liu School of Metallurgy Northeastern UniversityShenyang110819LiaoningChina Department of Materials Science and Technology Ji Hua LaboratoryFoshan528200GuangdongChina

The high strength and stability of the full-lamellar structure guarantee the industrial application of theβ-solidifyingγ-TiAl ***,it is a huge challenge to design an alloy with good hot-deformability as well as the full-lamellar *** low-cost Ti-42.5Al-2Mn-0.4Mo-0.1B-0.1C(at.%)alloy was designed,which undergoes bothβandαsingle-phase region during the *** is found that the full-lamellar structure can be obtained by the solution heat treatment at 1230℃ for 20 min and then aging treatment at 800℃ for 3 ***,a new microstructure,namely,the pearlitic-like microstructure(PM)induced by theα_(2)/γ→βo+γcellular reaction was observed when the aging temperature is increased to above 800℃.The volume fraction of the PM is gradually increased from 0%to 25.5%,65%,and 94%according to elevated aging temperature from 800 to 900,1000,and 1050℃,*** mechanism of the reducedα_(2)/γlamellae and PM formation was discussed regarding the heterogeneous distribution ofβstabilizing elements and the interface energy stored inα_(2)/γlamellae.

关键词： β-γ-TiAl Alloy design Two-step heat treatment Full-lamellar structure Cellular reaction

China Liver Transplant Registry plays an important role in liver transplantation

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Hepatobiliary & Pancreatic Diseases International 2025年第1期24卷 14-17页

作者： Zhe Yang jian-Peng Liu Jun-Li chen Shu-Sen Zheng Department of Hepatobiliary and Pancreatic Surgery Department of Liver TransplantationShulan(Hangzhou)HospitalHangzhou 310003China Division of Hepatobiliary Pancreatic Surgery the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Key Laboratory of Combined Multi-organ Transplantation Ministry of Public Healththe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China National Center for Healthcare Quality Management in Liver Transplant Hangzhou 310003China

In China, liver transplantation is an important discipline in the field of organ transplantation. China Liver Transplant Registry (CLTR) is a scientific project that has been set up to advance surgical techniques and procedures and to improve both short-and long-term post-transplant follow-up and outcome of the liver recipients. CLTR also serves as a robust data support platform for the National Liver Transplant Quality Control Center in the quest to upscale its quality control protocols. The mission of CLTR is to register all liver transplantation activities in the mainland of China and to conduct scientific analyses of the collected data. The huge number of compiled cases and the scientific research conducted over the past decade based on this database drastically revolutionized the clinical practice in the country. All CLTR activities and projects will be a guarantee to foster progresses of liver transplantation in China in a more scientific way, to standardize the systematic care in the field of liver transplantation.

关键词： Transplant registry China Liver Transplant Registry Liver transplantation Hepatocellular cancer

Adaptive Early Warning Method of Cascading Failures Caused by Coordinated Cyber-Attacks

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CSEE Journal of Power and Energy Systems 2025年第1期11卷 406-423页

作者： Yufei Wang June Li jian Qiu Yangrong chen Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of EducationSchool of Cyber Science and EngineeringWuhan UniversityWuhan Hubei430072China China Electric Power Research Institute Beijing102209China Electric Power Planning&Engineering Institute Beijing 100120China

In order to accurately receive early warning of the cascading failures caused by coordinated cyber-attacks(CFCC)in grid cyber-physical systems(GCPS),an adaptive early warning method of CFCC is ***,the evolutionary mechanism of CFCC is analyzed from the attackers'view,the CFCC mathematical model is established,and the transition processes of GCPS running states under the influence of CFCC staged failures are ***,the mathematical model of the adaptive early warning method is ***,the mathematical model of the adaptive early warning method is mapped as an adaptive control process with tolerating staged failures damage,and the solving process is presented to infer the CFCC and its next evolution trend.A decision-making idea for the optimal active defense scheme is proposed considering the costs and gains of various defense ***,to verify the effectiveness of the adaptive early warning method,the warning and defense processes of a typical CFCC are simulated in a GCPS experimental system based on CEPRI-36 BUS.

关键词： Adaptive control theory cascading failures coordinated cyber-attacks early warning grid cyber-physical systems.