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Rare Earth-Based Antibacterial and Antialgal Complexes, Synthesis, Characterization and Application

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SSRN 2023年

作者： Li, Jinlei Zhu, Qiuyin Lin, Fenglong Wu, Yincai Liu, Linze Chen, Libin Huang, Jun Chen, Xirong Wang, Shenglong Song, Lijun Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou341000 China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Xiamen361021 China Technology Inc Xiamen361028 China Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on The Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China

关键词： Rare earths

Investigation on the Recovery of Thorium and Rare Earth from Radioactive Waste Residue by functionalized Ionic Liquids

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SSRN 2023年

作者： Sun, Xiaoqi Zeng, Zhiyuan Gao, Yun Ni, Shuainan Zhang, Sijia Fu, Xinyu CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences Xiamen361021 China University of Chinese Academy of Sciences Beijing100049 China Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341000 China

The ion-adsorbed rare earth ore (IATREO) separation plant has accumulated a large amount of thorium (Th) containing radioactively contaminated waste that poses a potential hazard to the environment and worker safety, requiring further treatment. The waste residue contains a much higher content of rare earth (RE) than the original IATREO and needs to be recycled. In this article, novel functionalized ionic liquids (FILs) based on cationic functionalization have been developed for the efficiently separation and recover of Th and RE from waste residue leaching solution (WRLS). Difunctionalization of the cation is more advantageous than mono-functionalization and non-functionalization, providing more coordination sites and achieving higher extraction and separation performance. At a pH of 3 in the simulated solution, it was observed that one of the ILs could extract 99.0% of Th while only 0.4% of rare earths were extracted, resulting in a high separation factor of Th/REs that reached 22114. The extraction reaction is carried out by ion association, and isooctyl alcohol acts as a stripping aid to provide easier stripping and regeneration. After 5 cycles of extraction-stripping-regeneration, the extraction and separation abilities of FILs remain stable. For the HCl leaching solution of waste residue, 99.5% of Th is separated in two extraction stages, and the total loss of RE is only about 15 mg/L. The recyclable IL separation strategy simplifies the separation process of Th and RE, reduces chemical consumption, and provides a new idea for the treatment of IATREO waste residue. © 2023, The Authors. All rights reserved.

关键词： Ionic liquids

Investigation on the Recovery of Thorium and Rare Earth from Radioactive Waste Residue by functionalized Ionic Liquids

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SSRN 2023年

作者： Sun, Xiaoqi Zeng, Zhiyuan Gao, Yun Ni, Shuainan Zhang, Sijia Fu, Xinyu CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials Fujian Institute of Research the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences Xiamen361021 China University of Chinese Academy of Sciences Beijing100039 China Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341000 China

A large amount of radioactively contaminated waste residue containing thorium (Th) has been accumulated in the residue warehouse of ion-adsorbed type rare earth ore (IATREO) separation factory, which needs to be further processed. The content of rare earth (RE) in the waste residue is much higher than the original IATREO, which needs to be recycled. In this article, some novel functionalized ionic liquids (FILs) based on cationic functionalization have been developed to efficient separate and recovery Th and RE from waste residue leaching solution (WRLS). Difunctionalization of cation is more advantageous than mono functionalization and non-functionalization, providing more coordination sites can achieve higher extraction and separation performance. Under mild conditions, nearly all the Th is precisely separated from REs by the preferred IL. The extraction mechanism of ion association and isooctanol as a stripping auxiliary agent provide simple stripping and regeneration. For the HCl leaching solution of waste residue, 99.5% of Th is separated in two extraction stages, the total loss of RE is only about 13 mg/L. The recyclable IL separation strategy simplifies the separation process of Th and RE, reduces the chemical consumption, and puts forward a new idea for the treatment of IATREO waste residue. © 2023, The Authors. All rights reserved.

关键词： Ionic liquids

Applying Struvite as a N-Fertilizer to Mitigate N2o Emissions in Agriculture: Feasibility and Mechanism

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SSRN 2022年

作者： Wang, Lei Ye, Chengsong Gao, Bing Wang, Xiaojun Li, Yaying Ding, Kai Li, Hu Ren, Kexin Chen, Shaohua Wang, Wei Ye, Xin Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China University of Chinese Academy of Sciences Beijing100049 China College of the Environment & Ecology Xiamen University Xiamen361102 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fuzhou360002 China

Nitrous oxide (N2O) is an effective ozone-depleting substance and an important greenhouse gas in the atmosphere. Fertilization is a major factor that dictates agricultural N2O emissions. In this work, as opposed to the commonly-seen highly-soluble N-fertilizers, we determine the feasibility of using struvite as a slow-releasing N-fertilizer and investigate its mechanism for mitigating N2O emissions. During the 149-d field cultivation of water spinach (Ipomoea Aquatica Forsk), struvite exhibits comparable crop yields, with a 40.8-58.1% N2O reduction compared with commercial fertilizers. In addition, we observe that struvite increases soil bacterial diversity effectively, while decreasing the level of nitrification genes (amoA) and increasing the content of denitrification genes (narG, nirS, nirK, norB and nosZ). By conducting partial least-square path modeling, we find that struvite mitigated N2O emissions by limiting the free ammonia-nitrogen and increasing the soil pH. Moreover, using struvite as the N-fertilizer may increase the struvite price from 50 to 131.7 €/ton, which creates added values for struvite-based P-recovery technologies. These findings provide new insights for effectively mitigating the agriculture N2O emission and help change the inherent impression that struvite is only suitable as a phosphorus (P) fertilizer, which could also benefit the struvite-based P-recovery technologies. © 2022, The Authors. All rights reserved.

关键词： Genes

Stable 1t -2h Mos2 Heterostructures for Efficient Electrocatalytic Hydrogen Evolution

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SSRN 2022年

作者： Hong, Zhaoan Hong, Wengting Wang, Bicheng Cai, Qian He, Xu Liu, Wei CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China College of Chemistry Fuzhou University Fuzhou350108 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fujian Fuzhou350108 China

1T-phase molybdenum disulfide (1T MoS2) can efficiently facilitate the charge transfer and provide the active site, exhibiting a better hydrogen evolution reaction (HER) than 2H MoS2. However, its thermodynamic instability becomes a major drawback that hinders its practical application. We report a chemical vapor deposition (CVD) method to grow MoS2 nanosheets with high 1T content (61.5%) by introducing an appropriate amount of antimony oxide. The 1T-2H hybrid structures grown in this mode are thermodynamically stable. 1T phase of the MoS2 produces a unique charge distribution that makes the S atoms at the 1T-2H interface more favorable for H adsorption, thus enhancing the HER activity on the MoS2 basal plane. This study has provided a new idea for the 1T-phase MoS2 preparation for efficient HER. © 2022, The Authors. All rights reserved.

关键词： Phase transitions

Spontaneously producing syngas from MFC-MEC coupling system based on biocompatible bifunctional metal-free electrocatalyst

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Science China Materials 2021年第3期64卷 592-600页

作者： Wei Wang Rahul Anil Borse Jiafang Xie Yaobing Wang Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsState Key Laboratory of Structural ChemistryKey Laboratory of Optoelectronic Materials Chemistry and PhysicsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China University of Chinese Academy of Sciences Beijing100049China Dalian National Laboratory for Clean Energy Dalian116023China

The preparation of high-value fuels and chemicals through the electrochemical carbon dioxide reduction reaction(CDRR)is of great significance to the virtuous cycle of carbon ***,due to the high overpotential involved in this reaction,high power consumption and high-cost noble-metal-based catalysts are required for driving this ***,the electrochemical CDRR was achieved on biocompatible metal-free nitrogen,phosphorus co-doped carbon-based materials(NP-C)in the microbial fuel cell-microbial electrolysis cell(MFC-MEC)coupling *** the bioelectrochemistry in MFC supplied power to drive the electrocatalysis in MEC,syngas was spontaneously produced from this coupling system without external energy *** the NP-C materials as the excellent bifunctional electrocatalyst for the CDRR and oxygen reduction reaction(ORR),the current density of the MEC reached−0.52 mA cm^−2,and the Faradaic efficiencies(FEs)of CO and H2 were 60%and 40%,respectively,at a load resistance of 10Ω.Moreover,the CO/H2 product ratio can be changed by adjusting the load resistance,which will widely meet various demand of syngas usage in further *** study provides a spontaneous and tunable production of syngas in biogas digesters via a electrochemical strategy.

关键词： spontaneous production syngas MFC-MEC coupling system N/P-co-doped carbon electrocatalyst

designing a 2D van der Waals oxide with lone-pair electrons as chemical scissor

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National Science Review 2025年第1期 113-119页

作者： Zhipeng Du Xu Chen Wei Liu Han Wang Qianting Xu Xiaoying Shang Yipeng Song Xueyuan Chen Junhua Luo Sangen Zhao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian College University of Chinese Academy of Sciences CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Quantum Science Center of Guangdong–Hong Kong–Macao Greater Bay Area (Guangdong)

Two-dimensional（2D） van der Waals（vdW） materials are known for their intriguing physical properties,but their rational design and synthesis remain a great challenge for *** this work,we successfully synthesized a new non-centrosymmetric oxide,***6,with Sb3+lone-pair electrons serving as chemical scissor to generate its 2D vdW crystal *** and few-layer InSbMoO6flakes are readily obtained via facile mechanical *** exhibit strong second-harmonic generation（SHG）response with an effective second-order nonlinear optical susceptibility χeff（2）of 32.4 pm·***,the SHG response is in-plane anisotropic and directly proportional to the layer thickness,independent of layer *** addition,the InSbMoO6flakes exhibit excellent thermal and atmospheric stability,along with pronounced anisotropy in Raman *** work implies that using lone-pair electrons as chemical scissor is an effective strategy for designing and synthesizing new 2D vdW materials for integrated photonic applications.

关键词：

Ultrafast(600 ps)α-ray scintillators

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PhotoniX 2022年第1期3卷 350-361页

作者： Richeng Lin Yanming Zhu Liang Chen Wei Zheng Mengxuan Xu Jinlu Ruan Renfu Li Titao Li Zhuogeng Lin Lu Cheng Ying Ding Feng Huang Xiaoping Ouyang State Key Laboratory of Optoelectronic Materials and Technologies School of MaterialsSun Yat-Sen UniversityGuangzhou 510275China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect and Radiation Detection Research Center Northwest Institute of Nuclear TechnologyXi’an 710024China School of Nuclear Science and Technology Xi’an Jiaotong UniversityXi’an 710049China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research On the Structure of MatterChinese Academy of SciencesFuzhou 350002China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China.

Large-size scintillators with high efficiency and ultrafast radiation fluorescence have shown more potential in the applications to ionizing radiation detection of medical diagnosis,nuclear control and high-energy ***,although traditional scintillators have made tremendous progress in scintillation efficiency,there are still challenges left in fluorescence *** with that problem,we adopted 2-inch ZnO as the substrate and doped gallium as activator to realize an ultrafast fluorescence excited byα-ray,of which the decay time is only 600 ps that is the shortest scintilla-tion decay time reported so *** results show that the shallow donor related with gallium not only effectively suppresses band-edge self-absorption,but makes ultrafast radiation possible,which gets gallium-doped ZnO as a potential scintillator for high-quality ultrafast dynamic imaging proved.

关键词： Scintillators Gallium doped zinc oxide Decay time Radioluminescence

Controllable Preparation of Cu2o/Cu-Cutcpp Mof Heterojunction for Enhanced Electrocatalytic Co2 Reduction to C2h4

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SSRN 2024年

作者： Sun, Miao Xu, Xiao Min, Shihao He, Jiaxin Li, Kun Kang, Longtian Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research The Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China College of Chemistry and Materials Science Fujian Normal University Fuzhou350007 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fujian Fuzhou350108 China University Chinese Academy of Science Fujian College Fuzhou350002 China

Copper-based metal-organic framework (Cu-MOF) materials with multiple active sites have attracted increasing attention to the electrocatalytic CO2 reduction reaction (ECR), however, face the huge challenge owing to the poor stability and low C2 selectivity. Here, the Cu2O/Cu-CuTCPP heterojunction (Cu2O/CPFs) with three Cu active sites are firstly constructed through in-situ electrodeposition method. The effect of CuSO4 concentration and electrodeposition conditions on ECR is systematically investigated. The optimized Cu2O/CPFs composite achieves the ethylene Faraday efficiency (FEC2H4) of 61.8% at –1.3 V vs. RHE, which is 1.9 and 3.42 times higher than those of CPFs and Cu2O, respectively. Meanwhile, the C2H4 partial current density (jC2H4) of –7.96 mA·cm-2 is 2.91 and 4.68 times higher than those of CPFs and Cu2O. Further experiments reveals that the formation of Cu2+-O–Cu+–O bond between Cu2O and Cu–O4 sites in Cu2O/CPF heterojunction is crucial. Consequently, the hydrogen (H2), formic acid (HCOOH) and methane (CH4) evolution reactions are restricted, the C–C coupling reaction of *CHO and *CO intermediates is significantly enhanced, and the Cu–O4 sites in CPFs are protected. This work provides an effective strategy to stabilize MOF structure and obtain high value-added C2+ products. © 2024, The Authors. All rights reserved.

关键词： Heterojunctions