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Journal of Energy Chemistry 2021年第12期30卷 521-527,I0012页

作者： Bing Huang Kun Hou Yang Liu Rongtao Hu Lunhui Guan CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002 FujianChina University of Chinese Academy of Sciences Beijing 100049China

Nitrogen-doped carbon-based materials are promising non-platinum group metal electrocatalysts for the oxygen reduction reaction(ORR).Understanding their ORR active sites is vital for the rational design and development of nitrogen-doped carbon-based electrocatalysts with enhanced catalytic efficiency and ***,the conclusive analysis of the ORR mechanism of nitrogen-doped carbon-based electrocatalysts remains a grand challenge because the catalysts have a complex inhomogeneous ***,we elucidate this problem using nitrogen-doped carbon nanotubes framework catalysts with fixed defect concentrations prepared by pre-thermal treatment at a low *** generation of defects under high-temperature treatment was effectively suppressed to enable a simple model for ORR mechanism study.A correlation between ORR pathways and the different nitrogen species in the nitrogen-doped carbon catalysts was revealed through a combination of structural and electrochemical properties ***,our results also demonstrate the importance of defects for *** believe that the results will provide instructive guidance for designing and developing novel carbon nanomaterials for ORR.

关键词： Electrocatalysts Oxygen reduction reaction Defects Nitrogen-doped carbon nanotube

Self-assembled donor-acceptor hole contacts for inverted perovskite solar cells with an efficiency approaching 22%: The impact of anchoring groups

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Journal of Energy Chemistry 2022年第5期31卷 87-95页

作者： Qiaogan Liao Yang Wang Zilong Zhang Kun Yang Yongqiang Shi Kui Feng Bolin Li Jiachen Huang Peng Gao Xugang Guo Department of Materials Science and Engineering Guangdong Provincial Key Laboratory of Functional Oxide Materials and DevicesSouthern University of Science and Technology(SUSTech)Shenzhen 518055GuangdongChina College of Materials Fujian Key Laboratory of Advanced MaterialsXiamen UniversityXiamen 361005FujianChina CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Self-assembled molecules(SAMs) have shown great potential in replacing bulk charge selective contact layers in high-performance perovskite solar cells(PSCs) due to their low material consumption and simple processing. Herein, we design and synthesize a series of donor-acceptor(D-A) type SAMs(MPA-BTCA, MPA-BT-BA, and MPA-BT-RA, where MPA is 4-methoxy-N-(4-methoxyphenyl)-N-phenylaniline;BT is benzo[c][1,2,5]-thiadiazole;CA is 2-cyanoacrylic acid, BA is benzoic acid, RA is rhodanine-3-propionic acid) with distinct anchoring groups, which show dramatically different properties. MPA-BTCA with CA anchoring groups exhibited stronger dipole moments and formed a homogeneous monolayer on the indium tin oxide(ITO) surface by adopting an upstanding self-assembling mode. However, the MPA-BT-RA molecules tend to aggregate severely in solid state due to the sp~3 hybridization of the carbon atom on the RA group, which is not favorable for achieving a long-range ordered self-assembled ***, benefiting from high dipole moment, as well as dense and uniform self-assembled film,the device based on MPA-BT-CA yielded a remarkable power conversion efficiency(PCE) of 21.81%.Encouragingly, an impressive PCE approaching 20% can still be obtained for the MPA-BT-CA-based PSCs as the device area is increased to 0.80 cm^(2). Our work sheds light on the design principles for developing hole selecting SAMs, which will pave a way for realizing highly efficient, flexible, and large-area PSCs.

关键词： Self-assembled molecules Donor-acceptor backbones Hole contacts Perovskite solar cells Anchoring groups

新型铝离子电池能否引领下一次电池产业变革?(英文)

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Science Bulletin 2015年第11期60卷 1042-1044,I0008页

作者： Delai Ye Bin Luo Gaoqing Max Lu Lianzhou Wang nanomaterials Centre School of Chemical EngineeringAustralian Institute of Bioengineering and Nanotechnology The University of Queensland

Based on the most abundant metal of aluminum(Al),the concept of rechargeable aluminum-ion batteries(AIBs)has been proposed for a few decades,offering the possibilities to replace the benchmark lithium-ion batteries(LI... 详细信息

关键词：锂离子电池铝离子游戏规则便携式电子产品循环稳定性电化学性能大型电网阴极材料

Cyanobacteria-based near-infrared light-excited self-supplying oxygen system for enhanced photodynamic therapy of hypoxic tumors

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Nano Research 2021年第3期14卷 667-673页

作者： Yinghua Zhang Huifang Liu Xinyue Dai Hang Li Xiaohan Zhou Shizhu Chen Jinchao Zhang Xing-Jie Liang Zhenhua Li College of Chemistry&Environmental Science Analytical Chemistry Key Laboratory of Hebei ProvinceChemical Biology Key Laboratory of Hebei ProvinceHebei UniversityBaoding071002China Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education Institute of Life Science and Green DevelopmentHebei UniversityBaoding071002China College of Pharmaceutical Science Key Laboratory of Pharmaceutical Quality Control of Hebei ProvinceHebei UniversityBaoding071002China Beijing Pharmaceutical group Company Limited Beijing100101China The National Institutes of Pharmaceutical R&D Co. Ltd.China Resources Pharmaceutical Group LimitedBeijing102206China CAS Key Laboratory for Biological Effects of nanomaterials and Nanosafety National Center for Nanoscience and TechnologyBeijing100190China

Tumor hypoxia has been considered to induce tumor cell resistance to radiotherapy and anticancer chemotherapy,as well as predisposing for increased tumor ***,strategies for the eradication of the hypoxic tumor are highly *** therapy(PDT)is a new technique that can be used to treat tumors using laser irradiation to photochemically activate a *** to traditional radiotherapy and chemotherapy,photodynamic therapy has many advantages,such as good selectivity,low toxicity,and less trauma and ***,PDT is oxygen-dependent,and the lack of oxygen in hypoxic tumors renders photodynamic therapy ***,the earliest photosynthetic oxygen-generating organisms,can utilize water as an electron donor to reduce CO_(2) into organic carbon compounds along with continuously releasing oxygen under *** by this,herein,cyanobacteria were used as a living carrier of photosensitizer conjugated upconversion nanoparticles(UCNP)to construct a self-supplying oxygen PDT *** in the PDT efficiency for hypoxic tumors can be achieved as a result of in situ oxygen production by cyanobacteria under near-infrared(NIR)light using UCNP as a light harvesting antenna.A successful demonstration of this concept would be of great significance and could open the door to a new generation of carrier systems in the field of hypoxia-targeted drug transport platforms.

关键词： self-supplying oxygen cyanobacteria hypoxic tumor photodynamic therapy upconversion nanoparticles

Precipitation transformation of rare earth sulfate into chloride with p-dodecylphenoxy carboxylic acids

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Journal of Rare Earths 2019年第12期37卷 1326-1333页

作者： Yanliang Wang Jia Su Xiangguang Guo Jianguo Cui Yan Bai Fujian Li Xiaoqi Sun 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 350002China University of Chinese Academy of Sciences Beijing 100039China Baotou Research Institute of Rare Earths Baotou 014010China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Ganzhou Rare Earth group Co. Ltd.Ganzhou 34WOOChina

Methods for transforming rare earth(RE)sulfate into chloride mainly include extraction process with organophosphonic mono-acids or aliphatic acids and precipitation process with ammonium bicarbonate(NH4 HCO3).In this paper,alkylphenoxy carboxylic acids(HAs)ofp-dodecylphenoxy acetic acid(HA-Ⅰ),pdodecylphenoxypropanoic acid(HA-Ⅱ)and p-dodecylphenoxybutyric acid(HA-Ⅲ),which were liquid at room temperature were synthesized and *** precipitation mechanisms of RE elements with the HAs were investigated and the HA/RE molar ratios of the solid complexes were determined as3:1 by equi-molar series method which accord with the principle of charge *** of HAs for the transformation of RE sulfate from concentrated sulfuric acid roasted RE concentrate into chloride via precipitation method was discussed.100%HA-Ⅱwas selected as the liquid organic precipitant without dilution of volatile solvent soracceleration of phase separation by *** RE sulfate solution can be precipitated by HA-Ⅱafter neutralization with liquid NaOH and stripped with concentrated HCl at room *** concentration of RE chloride of 218.1 g/L with low residue of sulfate radical of 0.536 g/L was *** residual organic precipitant in the raffinate solution was tested to be lower than 8 mg/L at 25℃and the chemical oxygen demand(COD)in wastewater was less than 50 mg/L.

关键词： Rare earth Dodecylphenoxycarboxylic acid Recovery Precipitation Transformation

Mode-locking of fiber lasers using novel two-dimensional nanomaterials: graphene and topological insulators [Invited]

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Photonics Research 2015年第2期3卷 56-63页

作者： Grzegorz Sobon Laser & Fiber Electronics group Wroclaw University of Technology

The paper summarizes the recent achievements in the area of ultrafast fiber lasers mode-locked with so-called lowdimensional nanomaterials: graphene, topological insulators（Bi2Te3, Bi2Se3, Sb2Te3）, and transition metal sulfide semiconductors, like molybdenum disulfide（MoS2）. The most important experimental achievements are described and compared. Additionally, new original results on ultrashort pulse generation at 1.94 μm wavelength using graphene are presented. The designed Tm-doped fiber laser utilizes multilayer graphene as a saturable absorber and generates 654 fs pulses at 1940 nm wavelength, which are currently the shortest pulses generated from a Tm-doped fiber laser with a graphene-based saturable absorber.

关键词： mode Invited Mode-locking of fiber lasers using novel two-dimensional nanomaterials graphene and topological insulators

nanomaterials in Biomedicine

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Soft Nanoscience Letters 2015年第3期5卷 53-54页

作者： Mosaad A. Abdel-Wahhab Francisco Márquez Food Toxicology & Contaminants Department National Research Center Dokki Cairo Egypt nanomaterials Research group-NRG School of Natural Sciences and Technology University of Turabo Gurabo Puerto Rico USA

Nowadays, nanomaterials have become an emerging field that has shown great promise in the development of novel diagnostic, imaging and therapeutic agents for a variety of diseases, including cancer, due to their nanoscale size effects and increased surface area. In comparison to their larger counterparts, nanomaterials have unique physicochemical and biological properties including size, shape, chemical composition, surface structure and charge, aggregation and agglomeration, and solubility which can affect their interactions with biomolecules and cells. Nanoparticles (NPs) with size-tunable light emission have demonstrated an impressive potential as high-efficiency delivery transporters for biomolecules into cells, being used to produce exceptional images of tumor sites. Moreover, NPs delivery system has been widely applied in pharmaceutical field to enhance absorption of bioactive compounds since they can interact with several phytochemicals by hydrogen bonds and hydrophobic interactions to encapsulate these phytochemicals in NPs and thus enhance aqueous solubility of the chemicals. Moreover, NPs also can prevent against oxidation/degradation of the phytochemicals encapsulated in the gastrointestinal tract and can be taken directly up by epithelial cells in the small intestine resulting in the increase of absorption and bioavailability of phytochemicals. In general, there are two specific fields of utilization of intrinsically active NPs as pharmacologic agents including oxidative-related pathologies and cancer. On the other hand, Redox active NPs have been shown to ameliorate many clinically relevant pathological disorders that implicate oxidative stress, reducing the oxidative burden and alleviating many important symptoms. Such NPs act either in a catalytic way resembling the action of antioxidant enzymes such as catalase and superoxide dismutase, or as activating surfaces to facilitate reactions between the aqueous environment and the reactive oxygen species p

关键词： nanomaterials Biomedicine

Cytotoxicity and autophagy induction by graphene quantum dots with different functional groups

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Journal of Environmental Sciences 2019年第3期31卷 198-209页

作者： Yichun Xie Bin Wan Yu Yang Xuejing Cui Yan Xin Liang-Hong Guo State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences CAS Key Laboratory for Biomedical Effects of nanomaterials and Nanosafety National Center for Nanoscience and Technology of China Institute of Environment and Health Jianghan University

Graphene quantum dots(GQDs) possess great potential in various applications due to their superior physicochemical properties and wide array of available surface ***, the toxicity of GQDs has not been systematically assessed, thus hindered their further development; especially, the risk of surface modifications of GQDs is largely unknown. In this study, we employed a lung carcinoma A549 cells as the model to investigate the cytotoxicity and autophagy induction of three types GQDs, including cGQDs(COOH-GQDs), hGQDs(OH-GQDs), and aGQDs(NH_2-GQDs). The results showed hGQDs was the most toxic, as significant cell death was induced at the concentration of 100 μg/mL,determining by WST-1 assay as well as Annexin-V-FITC/PI apoptosis analysis, whereas cGQDs and aGQDs were non-cytotoxic within the measured concentration. Autophagy detection was performed by TEM examination, LC3 fluorescence tracking, and Westernblot. Both aGQDs and hGQDs induced cellular autophagy to various degrees except for cGQDs. Further analysis on autophagy pathways indicated all GQDs significantly activated p-p38 MAPK; p-ERK1/2 was inhibited by aGQDs and hGQDs but activated by c GQDs. p-JNK was inhibited by aGQDs and c GQDs, while activated by hGQDs. Simultaneously, Akt was activated by hGQDs but inhibited by aGQDs. Inhibition of autophagy by 3-MA significantly increased the cytotoxicity of GQDs, suggesting that autophagy played a protective role against the toxicity of GQDs. In conclusion, c GQDs showed excellent biocompatibility and may be considered for biological applications. Autophagy induction may be included in the health risk assessment of GQDs as it reflects the stress status which may eventually lead to diseases.

关键词： Graphene quantum dots Cytotoxicity Autophagy Surface functional group

Recovery of thorium and rare earths from leachate of ion-absorbed rare earth radioactive residues with N1923 and Cyanex■572

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Journal of Rare Earths 2021年第10期39卷 1273-1281,I0004页

作者： Jia Su Xiangguang Guo Yun Gao Shan Wu Ruigao Xu Xiaoqi Sun 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 350002China Xiamen Institute of Rare Earth Materials Haixi InstituteChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100039China Longnan County Nanyu Rare Earth Resources Comprehensive Utilization Co. Ltd.Ganzhou 341000China Ganzhou Rare Earth group Co. Ltd.Ganzhou 341000China

Ion-absorbed rare earth ores radioactive residues(IREORR)are a class of waste residue from the production of rare earth elements(REEs).Because of its radioactive dose,IREORR are usually stored in waste *** are difficult to be disposed ***,it contains relatively high concentrations of REEs,which can be considered as a valuable secondary *** this paper,a novel process is developed for the separation of thorium(Th)and recovery of REEs from IREORR hydrochloric acid leachate with primary amine N1923 and Cyanex?572,*** effects of sulfate concentration,extractant concentration and pH on N1923 extraction in hydrochloric acid solution were investigated in *** results show that the extraction capacity of N1923 can be improved by adding sulfate to the solution and increasing the concentration of *** has little effect on the extraction of Th when pH is higher than *** for the stripping,REEs are more easily stripped from loaded organic phase than Th,and nitric acid is a better stripping agent than hydrochloric *** with the extraction of Cyanex■572 for REEs,a fractional extraction experiment for separating Th and enriching of REEs was *** yield of Th is higher than 99.9%and the concentration of REEs is enriched to 183.84 g/L.

关键词： Radioactive residues Rare earth Thorium Primary amine N1923 Cyanex?572

Platelet membrane-based and tumor-associated platelet- targeted drug delivery systems for cancer therapy

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Frontiers of Medicine 2018年第6期12卷 667-677页

作者： Yinlong Zhang Guangna Liu Jingyan Wei Guangjun Nie College of Pharmaceutical Science Jilin UniversityChangchun 130021China CAS Key Laboratory for Biomedical Effects of nanomaterials and Nanosafety CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Platelets have long been known to play critical roles in hemostasis by clumping and clotting blood vessel injuries. Recent experimental evidence strongly indicates that platelets can also interact with tumor cells by direct binding or secreting cytokines. For example, platelets have been shown to protect circulating cancer cells in blood circulation and to promote tumor metastasis. In-depth understanding of the role of platelets in cancer progression and metastasis provides promising approaches for platelet biomimetic drug delivery systems and functional platelet-targeting strategies for effective cancer treatment. This review highlights recent progresses in platelet membrane-based drug delivery and unique strategies that target tumor-associated platelets for cancer therapy. The paper also discusses future development opportunities and challenges encountered for clinical translation.

关键词： platelet-mimicking delivery systems tumor-associated platelets cancer therapy EPR effect