Institute of Chemistry
Changchun Institute of Applied Chemistry, Chinese Academy Of SciencesNot a member yet
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Modifying candle soot with FeP nanoparticles into high-performance and cost-effective catalysts for the electrocatalytic hydrogen evolution reaction
No full textDeveloping inexpensive and highly efficient non-precious-metal electrocatalysts has been proposed as a promising alternative to platinum-based catalysts for the hydrogen evolution reaction (HER). Herein, we report novel FeP NPs supported on inexpensive and available candle soot (FeP-CS) derived from Fe3O4-CS hybrid precursors obtained after a phosphidation reaction. As HER electrocatalysts, the FeP-CS hybrids exhibit high electrocatalytic ability for HER with a Tafel slope of 58 mV dec(-1), a low onset overpotential of 38 mV, a large exchange current density of 2.2 x 10(-1) mA cm(-2) and an overpotential of 112 mV to obtain a current of 10 mA cm(-2). The present work shows significant advance in designing and developing non-precious-metal electrocatalysts for hydrogen evolution reaction
Hierarchical Co3O4 porous nanowires as an efficient bifunctional cathode catalyst for long life Li-O-2 batteries
No full textHierarchical Co3O4 porous nanowires (NWs) have been synthesized using a hydrothermal method followed by calcination. When employed as a cathode catalyst in non-aqueous Li-oxygen batteries, the Co3O4 NWs effectively improve both the round-trip efficiency and cycling stability, which can be attributed to the high catalytic activities of Co3O4 NWs for the oxygen reduction reaction and the oxygen evolution reaction during discharge and charge processes, respectively
Near infrared-caged D-amino acids multifunctional assembly for simultaneously eradicating biofilms and bacteria
No full textA nanodevice composed of an upconverting nanoparticle (UCNP) core and a thin TiO2 shell surface modified with D-amino acids was designed. Due to the UCNP core, NIR light can be converted to high-energy UV photons. As a consequence, UV light can stimulate the TiO2 shell to produce antibacterial reactive oxygen species (ROS) and trigger the release of free D-amino acids (antibiofilm agents)
Graphene Oxide-Supported Ag Nanoplates as LSPR Tunable and Reproducible Substrates for SERS Applications with Optimized Sensitivity
No full textNanopartides and nanohybrids with well-defined structures, along with tunable localized surface plasmon resonance (LSPR) properties and optimized sensitivity, are crucial and highly desired for surface-enhanced Raman spectroscopy (SERS) applications. In this article, we report on a very promising and flexible SERS platforms with a tunable LSPR response and sensitivity based on Ag nanoplates and graphene oxide (GO). The SERS detection sensitivity can be easily optimized and significantly improved by fine-tuning the LSPR band of the Ag nanoplate/GO substrates (to enhance the SERS response) during sample preparation. We applied the as-prepared SERS platform for sensitive SERS detection of 4-mercaptobenzoic acid and 4-aminothiophenol and found that the SERS signal varied markedly (by similar to 10-15-fold) with the fine-tuning of the LSPR band. The SERS enhancement factor of the Ag nanoplate/GO complexes was more than 104 times larger than that obtained using spherical Ag nanopartides. The as-prepared Ag nanoplate/GO platforms, because of their excellent stability and tunable LSPR properties, will find promising practical SERS applications
全浓度梯度分布的核壳型多元锂离子电池正极材料及其制备方法
No full text本发明涉及一种全浓度梯度分布的核壳型多元锂离子电池正极材料及其制备方法,属于锂离子电池电极材料领域。该正极材料的结构式为LiaNixCoyMn1-x-yO2@LibNimConMn1-m-nO2,其中0.9≤a≤1.2,0.6≤x≤0.9,0.05≤y≤0.4,0.9≤b≤1.2,0.2≤m≤0.7,0.1≤n≤0.6,该正极材料形状为球形或类球形,结构为核壳型,其内核部分为全浓度梯度部分,直径为2～10μm；外壳部分为保护层部分,其保护层厚度为0.5～2μm,该保护层部分浓度为全浓度梯度终点浓度；从内核核心到外壳表面过程中,镍含量逐渐降低,钴含量及锰含量逐渐升高。该材料具有成本低、循环性能好、安全性能好、放电容量高等优点。此外,本发明工艺流程简单,易于实现工业化生产
一种药物-基因共载系统及其制备方法
No full text本发明提供了一种药物-基因共载系统及其制备方法,该药物-基因共载系统包括改性聚乙烯亚胺-阿霉素键合药和基因物质；所述改性聚乙烯亚胺-阿霉素键合药具有式I结构。本发明提供的具有式I结构的改性聚乙烯亚胺-阿霉素键合药与基因物质静电复合,可以将基因物质带到细胞内进行表达,药物和基因共同实现治疗的目的。实验结果表明：本发明所提供的药物-基因共载系统对B16F10(高转移黑色素瘤)细胞在酸性条件下细胞毒性远远大于正常pH值＝7.4中的细胞毒性,且具有与聚乙烯亚胺相当的转染效率和转染抑制效率。另外,该药物-基因共载系统具有pH值响应性,从而使得该药物-基因共载系统具有智能型可控释放的特性
环氧树脂基中子和γ射线屏蔽复合材料及其制备方法与应用
No full text环氧树脂基中子和γ射线屏蔽复合材料及其制备方法与应用,属于屏蔽材料技术领域。解决了现有技术中屏蔽材料的屏蔽性能与其它物理力学性能难以兼顾、不能满足应用灵活性和施工多样性的要求,且制备工艺复杂的技术问题。该复合材料由5-15重量份的环氧树脂、2-9重量份的固化剂、1-10重量份的快中子慢化剂、2-20重量份的热中子吸收剂、65-85重量份的γ射线屏蔽剂、0-3重量份的惰性稀释剂、0-3重量份的活性稀释剂、0-2重量份的促进剂和0.5-5重量份助剂组成。该复合材料具有优异的中子及γ射线混合场屏蔽性能,且材料低毒、无气味、制备工艺简单、施工方便,可广泛应用于严格要求防辐射的各个领域中
一种聚合物薄膜太阳能电池阳极界面材料的制备方法
No full text本发明涉及一种用于聚合物薄膜太阳能电池的阳极界面材料的制备方法,属于太阳能电池技术领域。该阳极界面层由超声制备的氧化铜纳米粒子构成。通过紫外臭氧处理后,氧化铜薄膜的电荷传输和收集能力得到提高。使用氧化铜纳米粒子薄膜作为阳极界面层的器件取得了更加优异的性能,能量转化效率由6.00％增大到6.44％。本发明所述氧化铜纳米粒子薄膜的制备方法具有工艺简单、成本低廉、不需要高温处理等优点,同时解决了PEDOT:PSS界面层所导致的器件稳定性差的问题。本发明所提供的氧化铜纳米粒子薄膜完全可以替代PEDOT:PSS,作为阳极界面材料在聚合物薄膜太阳能电池领域得到进一步的应用
一种聚芴及其制备方法
No full text与现有技术相比,本发明提供了一种聚芴,具有式(I)所示结构。其中,R1选自烷基、烷基取代的芳基或烷氧基取代的芳基；n为聚合度,3≤n≤1000。本发明提供的聚芴两端基均为溴原子,所述聚芴两端基结构明确且单一,光电性能稳定,同时本发明提供的聚芴可以作为中间体合成其他端基结构明确的聚芴或嵌段聚合物,在光电功能材料技术领域具有广阔的发展前景和巨大的应用潜力
一种碲化镉量子点及其制备方法
No full text本发明提供一种碲化镉量子点的制备方法,包括以下步骤：A)将次硫酸氢钠甲醛、碲单质和水在碱性条件下混合,进行反应,得到碲前体；B)在无氧环境中,将镉源、巯基乙酸与所述步骤A)得到的碲前体混合,进行反应,得到碲化镉量子点。本发明提供的碲化镉量子点的制备方法以次硫酸氢钠甲醛为还原剂,反应条件更加温和,更容易控制,并且,次硫酸氢钠甲醛便宜易得,成本较低,且得到的碲化镉量子点荧光量子产率较高,实验结果表明,按照本发明提供的制备方法得到的碲化镉量子点的荧光量子产率能够达到65～70％。本发明还提供了一种碲化镉量子点