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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

Pseudo-halide engineered electron transport layer for efficient and stable perovskite solar cells

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Pseudo-halide engineered electron transport layer for effici...

第五届能源材料和纳米技术国际会议（能源与环境材料）

作者： Qiu Xiong Can Wang Zilong Zhang Qin Zhou Peng Gao CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Laboratory for Advanced Functional Materials Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences

Rear interface management has been proved to be an effective strategy to realize highperformance perovskite solar cells (PvSCs). However, it still challenging to both improving the quality of electron transport layer as well as reducing the interfacial trap states of perovskite films due to the irreversibility of corresponding sequential deposition. Thereby, a simple strategy of adding pseudohalide acid to tin oxide precursor is applied to tackle this issue.

关键词： Pseudo-halide engineered electron transport layer for efficient and stable perovskite solar cells

Sub-10 nm lanthanide-doped SrFCl nanoprobes:Controlled synthesis,optical properties and bioimaging

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Journal of Rare Earths 2019年第7期37卷 691-698页

作者： Jiaojiao Wei Wei Lian Wei Zheng Xiaoying Shang Meiran Zhang Tao Dai Xueyuan Chen College of Chemistry Fuzhou UniversityFuzhou 350116China 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

Alkaline-earth dihalide nanocrystals(NCs) such as SrFCl, owing to their high chemical stability and low phonon energy, are excellent host materials for lanthanide(Ln3+) doping to achieve desirable optical properties for various bioapplications, Herein, we report a novel strategy for the synthesis of sub-10 nm Ln3+-doped SrFCl NCs with efficient upconverting and downshifting luminescence through a facile onestep hot-injection method. Utilizing the temperature-dependent upconverting luminescence(UCL) from the thermally coupled 2H11/2 and 4S3/2 levels of Er3+, we showed the potential of SrFCl:Yb,Er NCs as sensitive UCL nanoprobes for non-contact thermal sensing with a maximum detection sensitivity of 0.0066 K-1, which is among the highest values for thermal sensing based on Er3+-activated UCL nanoprobes. Furthermore, by employing the intense downshifting luminescence from Tb3+ and Eu3+, we demonstrated the successful use of biotinylated SrFCl:Ce,Tb and SrFCl:Eu3+ nanoprobes for biotin receptor-targeted cancer cell imaging, thus revealing the great promise of SrFCl:Ln3+ nanoprobes for versatile bioapplications.

关键词： Lanthanide SrFCl nanocrystals Upconverting luminescence Thermal sensing Bioimaging Rare earths

High-security-level multi-dimensional optical storage medium:nanostructured glass embedded with LiGa_(5)O_(8):Mn^(2+) with photostimulated luminescence

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Light(Science & Applications) 2020年第1期9卷 1799-1808页

作者： Shisheng Lin Hang Lin Chonggeng Ma Yao Cheng Sizhe Ye Fulin Lin Renfu Li Ju Xu Yuansheng Wang Key Laboratory of Optoelectronic Materials Chemistry and Physics Key Laboratory of Design and Assembly of Functional NanostructuresFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China University of Chinese Academy of Sciences Beijing 100049China CQUPT-BRU Innovation Institute Chongqing University of Posts and TelecommunicationsChongqing 400065China Xiamen Institute of Rare-earth Materials Haixi InstitutesChinese Academy of SciencesXiamenFujian 361000China

The launch of the big data era puts forward challenges for information preservation technology,both in storage capacity and ***,a brand new optical storage medium,transparent glass ceramic(TGC)embedded with photostimulated LiGa5O8:Mn2+nanocrystals,capable of achieving bit-by-bit optical data write-in and read-out in a photon trapping/detrapping mode,is *** highly ordered nanostructure enables light–matter interaction with high encoding/decoding resolution and low bit error ***,going beyond traditional 2D optical storage,the high transparency of the studied bulk medium makes 3D volumetric optical data storage(ODS)possible,which brings about the merits of expanded storage capacity and improved information *** application confirmed the erasable-rewritable 3D storage of binary data and display items in TGC with intensity/wavelength *** present work highlights a great leap in photostimulated material for ODS application and hopefully stimulates the development of new multi-dimensional ODS media.

关键词： optical glass trapping

Advancements in electrochemical synthesis: Expanding from water electrolysis to dual-value-added products

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eScience 2025年

作者： Wang, Genxiang Chen, Ao Chen, Yao Qiao, Fen Wang, Junfeng Yang, Nianjun Zhang, Hao Wen, Zhenhai School of Energy and Power Engineering Jiangsu University Zhenjiang 212013 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Materials and Techniques Toward Hydrogen Energy Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China Department of Chemistry & IMO-IMOMEC Hasselt University Diepenbeek 3590 Belgium Department of Chemical Engineering Massachusetts Institute of Technology Cambridge 02139 MA United States University of Chinese Academy of Science Beijing 100049 China

The application of electrochemical technologies for chemical and fuel synthesis offers a significantly more eco-friendly method than traditional industrial practice. However, electrochemical synthesis in aqueous solutions often involves a sluggish oxygen evolution reaction (OER) at the anode, yielding products that are less economically viable and leading to inefficient energy use. This challenge has prompted extensive research into replacing the OER with fast, value-added oxidation reactions (OER alternatives) in electrolysis systems. In this review, we summarize the latest research progress in coupled electrochemical systems that integrate OER alternatives with reduction reactions, beyond hydrogen evolution reactions, in aqueous solutions to synthesize dual value-added products. After providing a general overview, we start by introducing two key factors: (i) electrolytic devices and (ii) advanced characterization techniques for mechanism investigation. The focus then shifts to catalysts developed so far and their corresponding catalytic mechanisms, and to the electrochemical performance of these hybrid electrolysis systems. Finally, we outline and discuss the challenges and prospects for these integrated electrochemical systems to offer insights into future research directions and applications. We envision that this review will provide a panorama of electrolysis systems for dual value-added products, thereby fostering the development of green synthesis with zero carbon emissions. © 2024 The Authors

关键词： Electrochemical hybrid systems Electrosynthesis Oxygen evolution reaction alternatives Reduction reactions

An Investigation on Reaction Regularity of Mn-Fe-Ceox Catalyst System: Guide the Synthesis of Low-Temperature Nh3-Scr Catalytic Filter

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SSRN 2024年

作者： Zhang, Yanbing Wang, Xie Liang, Banglei Ren, Haibo Zhang, Xiaoxia Liu, Xingye Zhang, Xiang Liu, Xuelian Song, Yang Zheng, Weijie Zhang, Huazhi College of Materials and Chemical Engineering Henan University of Urban Construction Pingdingshan467000 China College of Advanced Manufacturing Fuzhou University Jinjiang362251 China School of Chemistry and Chemical Engineering Anqing Normal University Anqing246011 China College of Environmental Science and Engineering North China Electric Power University Beijing102206 China Key Laboratory of Fine Chemical Application Technology of Luzhou Luzhou646099 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Luzhou Vocational and Technical College China

A series of catalytic filters (Mn-Fe-CeOx/PPS) with satisfied NO conversion and physical properties were synthesized by the redox method. The Mn-Fe-Ce ternary catalyst system and corresponding oxidation-reduction equation were established by using the low-valent oxidation characteristics of cerium and iron to react with the high-valent reduction manganese. Furthermore, the optimal catalytic filter synthesized under the guidance of reaction regularity has excellent physicochemical properties such as high NO conversion (100% at 180 oC), high stability, low loading capacity (66.8 g/m2), and strong binding ability, making it suitable for complex operating conditions. Particularly, in the Mn-Fe-Ce ternary catalyst system, the coexistence of Ce4+ and Ce3+ causes surface oxygen vacancies, uneven local charge distribution and additional chemisorbed oxygen, which are conducive to the low-temperature selective catalytic reduction (L-T SCR) reaction. Meanwhile, there are also high valence Mn4+ and Fe3+ in catalyst system, which can promote the oxidation of NO and further improve the L-T SCR reaction. © 2024, The Authors. All rights reserved.

关键词： Physicochemical properties

Iron-incorporated nitrogen-doped carbon materials as oxygen reduction electrocatalysts for zinc-air batteries

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Chinese Journal of Catalysis 2020年第5期41卷 858-867页

作者： Kai Chen Suqin Ci Qiuhua Xu Pingwei Cai Meizhen Li Lijuan Xiang Xi Hu Zhenhai Wen Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063JiangxiChina CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina

The application of electrocatalysts for the oxygen reduction reaction(ORR) is vital in a variety of energy conversion technologies. Exploring low-cost ORR catalysts with high activity and long-term stability is highly desirable, although it still remains challenging. Herein, we report a facile and reliable route to convert ZIF-8 modified by Fe-phenanthroline into Fe-incorporated and N-doped carbon dodecahedron nanoarchitecture(Fe-NCDNA), in which carbon nanosheets are formed in situ as the building blocks with uniform Fe-N-C species decoration. Systematic electrochemical studies demonstrate that the as-synthesized Fe-NCDNA electrocatalyst possesses highly attractive catalytic features toward the ORR in terms of activity and durability in both alkaline and neutral media. The Zn-air battery with the optimal Fe-NCDNA catalyst as the cathode performs impressively, delivering a power density of 184 m W cm^–2 and a specific capacity of 801 m Ah g^–1;thus, it exhibits great competitive advantages over those of the Zn-air devices employing a Pt-based cathode electrocatalyst.

关键词： Oxygen reduction reaction Electrocatalyst Fe-N-C activity sites Alkaline/neutral medium Zn-air battery