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Degradation of Rhodamine B by MnFe-LDH/PMS/O_(3) three-phase catalytic system: performance, mechanism and ecotoxicity studies

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 111-127页

作者： Ying Han Ying Yang Weibao Liu Yilong Hou ce wang Jiangwei Shang Xiuwen Cheng Key Laboratory of Pollutant Chemistry and Environmental Treatment College of Chemistry and Environmental ScienceYili Normal UniversityYining 835000China Key Laboratory for Environmental Pollution Prediction and Control of Gansu Province College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China

This study developed a novel MnFe-LDH/PMS/O3 three-phase catalytic system to degrade the organic dye RhB, which was used to address the drawbacks of persulfate oxidation and ozonation techniques. The structure, ionic and elemental composition, specific surface area, and magnetic properties of the LDHs were investigated using a variety of physicochemical characterization tools. The results showed that MnFe-LDH had a large specific surface area, a rich crystalline phase composition, and a functional group structure. The RhB degradation rate of MnFe-LDH/PMS/O3 was 0.34 min−1, which was much higher than that of other comparative systems. RhB could be completely degraded in 10 min after optimization and had a significant effect on TOC removal. The system was found to be effective over a wide pH range. Common anions were largely unaffected and humic acid acted as an inhibitor. At the same time, the system had generally effective degradation performance for different dyes. Combined with quenching experiments and EPR, it was found that SO4•−, •OH, O_(2)•−, and 1O_(2) all participated in the reaction, and •OH contributed more. The degradation pathway of RhB was derived by LC-MS, and the T.E.S.T. evaluation found that the toxicity of the intermediate product was significantly reduced. Finally, the stability and availability of LDHs were verified using cycling experiments and metal ion leaching. This work provides a theoretical basis and data support for the synergistic catalysis of PMS/O3 and the deep treatment of dye wastewater.

关键词： Rhodamine B Layered double hydroxides Peroxymonosulfate Ozonation

Heterostructured Pt-Ni_(3)Mo_(3)N formed via ammonia-containing polyoxometalates for highly efficient electrocatalytic hydrogen evolution in acid medium

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Journal of Energy Chemistry 2024年第5期92卷 698-704页

作者： Bianqing Ren Xue Gong Jing Cao Dezheng Zhang Zizhun wang Ping Song ce Han Weilin Xu State Key Laboratory of Electroanalytical Chemistry Jilin Province Key Laboratory of Low Carbon Chemical PowerChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026AnhuiChina Key Laboratory of Automobile Materials MOE School of Materials Science&EngineeringJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsElectron Microscopy Centerand International Center of Future ScienceJilin UniversityChangchun 130012JilinChina

Constructing heterostructured nanohybrid is considered as a prominent route to fabricate alternative electrocatalysts to commercial Pt/C for hydrogen evolution reaction(HER).In this work,(NH_(4))_(4)[NiH_(6)Mo_(6)O_(4)]·5H_(2)O polyoxometalates(NiMo_(6))are adopted as the cluster precursors for simple fabrication of heterostructured Pt-Ni_(3)Mo_(3)N nanohybrids supported by carbon black(Pt-Ni_(3)Mo_(3)N/C)without using additional N sources.The improved porosity and enhanced electronic interaction of Pt-Ni_(3)Mo_(3)N/C should be attributed to the integration of Pt with NiMo_(6),which favors the mass transport,promotes the formation of exposed catalytic sites,and benefits the regulation of intrinsic activity.Thus,the as-obtained Pt-Ni_(3)Mo_(3)N/C exhibits impressive and durable HER performance as indicated by the low overpotential of 13.7 mV at the current density of 10 mA cm^(-2) and the stable overpotential during continuous working at 100 mA cm^(-2) for 100 h.This work provides significant insights for the synthesis of new highly active heterostructured electrocatalysts for renewable energy devices.

关键词： Polyoxometalates Cluster precursors Heterostructured nanohybrids Hydrogen evolution reaction Electrocatalysis

One-dimensional metallic, magnetic, and dielectric nanomaterialsbased composites for electromagnetic wave interference shielding

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Nano Research 2022年第10期15卷 9595-9613页

作者： Ya Cheng Wendong Zhu Xiaofeng Lu ce wang Alan G.MacDiarmid Institute College of ChemistryJilin UniversityChangchun 130012China

The excrescent electromagnetic(EM)radiation exposure in the air threatens human health and electronic equipment due to the abuse of EM waves in wireless telecommunication technology and electronic applications.Consequently,electromagnetic interference(EMI)shielding materials are provided to solve the EM waves pollution problem.In particular,the appearance of onedimensional(1D)metallic,magnetic,and dielectric nanofillers will extremely reduce the density of EMI composite and enhance EMI protection performance because they can easily assemble to form complete two-dimensional(2D)or three-dimensional(3D)EMI network based on their high aspect ratio,large specific surface area,and additional attenuated sites.This review focuses on the EMI shielding composites with 1D metallic,magnetic,and dielectric nanofillers,which could be constructed in the final form of membrane-or aerogel/sponge-like shielding materials.According to the structural features,1D metallic,magnetic,and dielectric nanofillers are classified into nanowires,nanorods,nanospindles,nanochains,nanofibers,nanotubes,nanorings,nanocoils,and quasi-one-dimensional(1D)van der Waals materials.Accordingly,the fabricated routes,shielding performances,and EM waves attenuation mechanism of the 1D metallic,magnetic,and dielectric nanofiller-based composites are summarized.It is found that the dominant shielding mechanism of most of the 1D metal-based EMI composites is reflection loss,while that of 1D magnetic and dielectric nanomaterials-based EMI composites is absorption loss caused by interfacial polarization,natural resonance,eddy current,and multiple scattering.Finally,the challenges and prospects of 1D nanofiller-based composites with a tunable architecture and composition are put forward,aiming to give a guideline for the next generation of high-performance EMI shielding materials.

关键词： one-dimensional nanofillers composites electromagnetic interference(EMI)shielding mechanism

Provenance of sediments in the northern Manila Trench:An assessment from detrital zircon geochronology

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Science China Earth Sciences 2023年第1期66卷 41-53页

作者： ce wang Heqi CUI Letian ZENG Ming SU School of Marine Sciences Sun Yat-sen UniversityZhuhai 519082China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering Zhuhai 519082China

Manila Trench is a critical region for revealing the tectonic evolution and source-to-sink process of the South China Sea,but the sediment provenance in the northern part of the trench remains unclear.In this study,we present a first detrital zircon U-Pb geochronology of sediments in the northern Manila Trench,in the vicinity of Northwestern Luzon Island,to identify the sediment provenance and understand the source-to-sink process in the marginal sea.The study shows that the sediments yielded multiple zircon age populations at ca.123,221,443,565,906,and 1871 Ma.A detailed detrital zircon age study indicates that the sediments were derived mainly from Taiwan Island,China,rather than the nearby Luzon Island.In comparison with the modern drainage systems surrounding northeastern South China Sea,this study further confirms that the sediments primarily originated from the Gaoping River(ca.45%),with subordinate contributions from the Lanyang River(ca.24%)and Min River(ca.19%).The study also elucidates two completely different sedimentary transport modes in the northern Manila Trench.The transportation of sediments from southwestern Taiwan Island is primarily related to the gravity-driven transport through the Gaoping submarine canyon.Furthermore,a quarter of detritus derived from eastern Taiwan Island might have been transported by the deep-water circulation of the Luzon Strait.This study highlights the provenance and transport pathway of sediments in the northern Manila Trench and provides a solution for understanding the source-to-sink process in the marginal sea.

关键词： Provenance Detrital zircon Manila Trench Taiwan Island South China Sea

Tumor microenvironment-responsive arsenic-loaded layered double hydroxides film with synergistic anticancer and bactericidal activity

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Rare Metals 2024年第3期43卷 1207-1221页

作者： Shun Xing Dong-Hui wang Hai-Feng Zhang Li-Dan Liu Cheng-ce Li Chao Wei Jun-Yu Liu Nai-Jian Ge Xuan-Yong Liu State Key Laboratory of High Performance ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Intervention center Eastern Hepatobiliary Surgery HospitalThe Third Affiliated Hospital of Naval Medical UniversityShanghai200438China School of Health Sciences and Biomedical Engineering Hebei University of TechnologyTianjin300130China

Malignant obstruction makes gallbladder cancer have a high mortality rate.Nickel-titanium alloy(nitinol)stents are commonly used as a local intervention to maximize patient survival time,but the stents lack antitumor and antibacterial capacity and are vulnerable to secondary obstruction.Arsenic-based drugs show good therapeutic promise against gallbladder cancer.To meet clinical needs.the layered double hydroxides(LDHs)film is constructed on the nitinol,whose arsenite loading amounts rose by 60%after simple heat treatment compared with the conventional anion-exchange strategy.In addition,calcination promotes the dissolution of nickel ions from the LDHs lattice,resulting in a powerful synergistic killing effect on tumor cells together with the released arsenic.More importantly,the calcined arsenic-loaded LDHs are sensitive to the acidic microenvironment of tumor tissues,which presents a much lower arsenic and nickel release amount in the normal tissues,guaranteeing its biosafety.Meanwhile,the vertically sharp LDHs nanosheets can synergize with arsenic to achieve effective physical cleavage and chemical killing of adherent and planktonic bacteria.In short,we attempt to use arsenic drugs for local interventions and reasonably avoid their toxic side effects,which provides a new design idea for nitinol stents applied in the treatment of gallbladder cancer.

关键词： Nitinol Layered double hydroxides Arsenic Gallbladder cancer

Permian-Triassic Magmatism in the Qin-Fang Tectonic Belt,SW China:New Insights into Tectonic Evolution of the Eastern Paleo-Tethys

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Journal of Earth Science 2023年第6期34卷 1704-1716页

作者： Yun Zhou Yongshan Zhao Yongfeng Cai Qiaofan Hu ce wang Collaborative Innovation center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources Guangxi Key Laboratory of Hidden Metallic Ore Deposits ExplorationGuilin University of TechnologyGuilin 541004China China Nonferrous Metals(Guilin)Geology and Mining Co. Ltd.Guilin 541004China School of Marine Sciences Sun Yat-sen UniversityZhuhai 519082China

The granites of ambiguous geodynamic mechanism in the Qin-Fang tectonic belt(SW China)were studied in detail based on petrological,element geochemical,zircon U-Pb geochronological,and Hf isotopic data.LA-ICPMS U-Pb analyses on zircon yield ages of 248-245 Ma for the granites from the Qin-Fang tectonic belt.The geochemical data show that they are high-K,calc-alkaline,and peraluminous series.Their ε_(Hf)(t)values are from -14.01 to -7.75 with two-stage model ages of 1.74-1.43 Ga.These data,integrated with low Al_(2)O_(3)/TiO_(2),Rb/Sr,Rb/Ba,and(Na_(2)O+K_(2)O)/(FeO^(T)+MgO+TiO_(2))ratios,and high CaO/Na_(2)O ratios for the granite,suggest an origin from psammite source which was contaminated by mantle-derived components.These observations,in combination with the age data and stratigraphic records in the Jinshajiang,Ailaoshan,and Hainan Island areas suggest that the granites were formed in a post-collision tectonic setting.The Qin-Fang tectonic belt was likely a branched ocean basin of the eastern Paleo-Tethys.

关键词： Paleo-Tethyan ocean zircon granite Permian-Triassic Qin-Fang tectonic belt

Liposomal Honokiol induces ROS-mediated apoptosis via regulation of ERK/p38-MAPK signaling and autophagic inhibition in human medulloblastoma

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Signal Transduction and Targeted Therapy 2022年第3期7卷 625-627页

作者： Shenglan Li Jinyi Chen Yaqiong Fan ce wang Can wang Xiaohong Zheng Feng Chen Wenbin Li Department of Neuro-oncology Cancer CenterBeijing Tiantan HospitalCapital Medical UniversityBeijingChina

Dear Editor,Nowadays,medulloblastoma accounts for approximately 25% of all pediatric brain tumors.1 Even with the successful treatment of primary tumors,there are still serious side effects.Honokiol(HNK)is defined as ... 详细信息

关键词： tumors pediatric Lipo

Assessment of tree-ring mercury radial translocation and age effect in Masson pine:Implications for historical atmospheric mercury reconstruction

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Journal of Environmental Sciences 2024年第4期138卷 266-276页

作者： Xu Liu Xun wang Dingyong wang College of Resources and Environment Southwest UniversityChongqing 400715China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

The tree ring has been regarded as an emerging archive to reconstruct historical atmospheric mercury(Hg)trends,but with the large knowledge gaps in the reliability.In this study,we comprehensively evaluated the Hg source,radial translocation and age effect of Masson pine(Pinus massoniana)tree ring at Mt.Jinyun in Chongqing,to assess the suitability of such tree ring as the archive of atmospheric Hg.Results showed that distinct variabilities among Masson pine tree-ring Hg concentration profiles.The Hg concentration significantly increased along with stem height(Pcentration.Besides,we used the advection-diffusion model to demonstrate how Hg concentration shifted by the advection or/and diffusion in tree rings.The modeling results showed that the advection induced radial translocation during the young growth period of tree was a plausible mechanism to result in the tree-ring Hg record largely different from the trend of anthropogenic Hg emissions in Chongqing.We finally suggest that in further Hg dendrochemistry,better discarding the tree-ring Hg profile of the young growth period to reduce impacts of the radial translocation and age effect.

关键词： Masson pine Tree-ring mercury Radial translocation Tree age effect

Pushing the boundaries: an interview with Dae-Hyun Kim on terahertz devices

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National Science Review 2024年第3期11卷 42-45页

作者： Defu wang the center for Carbon-based Electronics School of Electronics Peking University

Ⅲ–Ⅴ compound semiconductors, such as InGaAs/InAlAs, exhibit exceptional carrier transport properties, establishing them as fundamental elements in terahertz(THz) applications crucial for the development of 6G netwo...

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