Electrosprayed porous Fe3O4/carbon microspheres as anode materials for high-performance lithium-ion batteries

Nano Research - Porous Fe3O4/carbon microspheres (PFCMs) were successfully fabricated via a facile electrospray method and subsequent heat treatment, using ferrous acetylacetonate, carbon nanotubes...     

Mechanical Alloying and Spark Plasma Sintering of BiCuSeO Oxyselenide: Synthesis Process and Thermoelectric Properties

BiCuSeO is a promising thermoelectric material but needs a complicated synthesis process. In this work, fine‐grained BiCuSeO samples with high phase purity were synthesized by a combination of mechanical alloying (MA) and spark plasma sintering (SPS). It is found that BiCuSeO compounds can be formed by the reaction between BiSe and CuO, after BiSe appeared firstly when using Bi, Se, and CuO as raw materials during MA process. The electrical conductivity of the corresponding bulk attains a modest enhancement due to the significantly increased carrier concentration although the carrier mobility was reduced compared with the sample prepared by classical solid‐state reaction. The total thermal conductivity is below 0.7 W/mK in the whole measured temperature range, which is attributable to the increased defects and gain boundaries. As a result, a relatively high ZT value of 0.50 was obtained for the pristine BiCuSeO sample. In addition, when Bi was replaced by Ca element, the electrical transport property of the samples was improved, resulting in an enhancement of ZT in the whole measured temperature range.     

基于GC-MS指纹图谱和化学计量学方法鉴别陈皮

制备了陈皮挥发油提取物并建立其气相色谱-质谱（GC-MS）指纹图谱,对不同批次的陈皮指纹图谱进行相似度评价;对其共有成分峰面积数据进行主成分分析（PCA）和层次聚类分析（HCA）。建立了具有16个共有峰的新会陈皮挥发油指纹图谱,通过化学计量学分析方法能将新会陈皮和其他陈皮样品准确区分开来;不同采摘期及贮存时间陈皮的成分呈现规律性特征。方法可用于不同产地、采摘期及贮存时间陈皮的鉴别,并为陈皮的质量控制提供依据。     

镧铁合金中14项稀土杂质含量的测定—电感耦合等离子体发射光谱法

采用电感耦合等离子体发射光谱法（ICP-OES）测定镧铁合金中铈、镨、钕、钐、铕、钆、铽、镝、钬、铒、铥、镱、镥、钇稀土杂质元素。镧铁合金试料在硝酸介质中,以近似基体匹配法校正基体对测定的影响,直接以氩等离子体光源激发,用标准曲线法进行光谱测定。为选择合适的分析线,先根据光谱波长表预选几条强度大,激发电位低的谱线,然后对此谱线进行轮廓扫描,从而选出一条背景平坦,信背比大,基体及共存元素干扰少或无干扰的谱线作为分析线。用基体匹配法配制标准溶液,根据产品标准XB/T 407—2020指标,以铁（85 %）与镧（15 %）配制成混合基体,配制6个系列标准溶液进行曲线绘制。该方法适用于铈、镨、钕、钐、铕、钆、铽、镝、钬、铒、铥、镱、镥、钇含量在0.005 %~0.25 %的分析测定。方法的相对标准偏差（n=11）在0.74 %~2.58 %之间,用标准加入法对方法的回收率进行试验,测得回收率在91.75 %与107.75 %之间, 能满足产品测定要求。      

焦炉煤气组合脱硫工艺的讨论和比选

介绍了真空碳酸盐法（VS法）、氨硫联合洗涤法（AS法）、ADA法焦炉煤气脱硫工艺的优缺点,并对VS-WSA工艺、ADA-硫磺工艺、AS-WSA工艺与AS-硫磺工艺的经济效益进行了比较,为选择科学可靠的焦炉煤气脱硫工艺提供了参考.     

莺─琼盆地梅山组烃源岩中树脂物质的特征和赋存形式

莺─琼盆地中新统梅山组有机质类型为典型的Ⅲ型干酪根，其饱和烃和芳烃馏分中富含来源于化石树脂的杜松烷系列化合物。显微镜分析表明梅山组有机质中树脂体含量较低，在有机显微组分所占比例在４％以下，平均含量只有１．５％～２％，且颗粒细小，多为１～３μｍ。干酪根超薄切片的透射电子显微镜分析证实微米级和微米级以下超微树脂体在低成熟（Ｒｏ＜０．７０％）梅山组烃源岩干酪根中广泛存在，其丰度可达５％～１０％，而较高成熟度下则其中广泛存在亚微粒体和微粒体。梅山组烃源岩植物树脂主要赋存在超微层次和分子级层次，成烃过程中植物树脂的贡献远较烃源岩中树脂体数量所反映的高。根据梅山组有机质组成和丰度，认为它可作为良好气源岩，丰富树脂物质的存在大大提高了其生气强度。     

光响应型分子的合成及应用研究进展

光响应型分子作为一种刺激性响应分子,因其具有信号稳定、远程控制、瞬时性和环保性等优势,而广泛应用于智能材料、光控器件等领域,其中最典型、研究最广泛的当属光致异构分子。光致异构分子在特定波长光照下会发生结构变化,在宏观上有时会表现出颜色的改变,在另一波长光照下结构会重新变为原来的结构,颜色也会随之褪去。综述了螺吡喃、偶氮苯、二芳基乙烯等几种主流的光致异构分子的合成与制备、光响应机理以及在盐湖资源提取、药物检测、储能材料制备等实际生产生活中的应用,并对光响应分子在低成本环境友好合成、复合功能材料化、智能分子器件等方面的发展趋势进行了展望。     

莺-琼盆地高温超压对有机质热演化的影响

剖析影响莺-琼盆地10口高温高压井的实测镜质体反射率数据的因素,结合热模拟实验结果,探讨高温、超压对第三系腐植型有机质热演化与生烃的影响。认为：高地热场为腐植型有机质向天然气转化提供了有利的条件,特别是莺歌海盆地泥底辟带存在短暂的深源热流体上侵,可能使浅层沉积中的有机质转化成低成熟原油;超高压对有机质热演化的抑制作用是次要的,即便有少许抑制作用,也往往被高温效应掩盖。图4表1参17     

Removal of Volatile Organic Compounds by Adsorption and Photocatalytic Oxydation

Based on the study of equilibrium adsorption on viscose rayon-based activated carbon fiber （ACF） by gravimetric method, mounting of TiO2 on PAN-based activated carbon cloth （ACC） and their photocatalytic activity as well as adsorption performance for benzene were investigated. The crystallinity of TiO2 and pore structure were characterized by XRD and N2 adsorption. The results show that crystallinity of TiO2 and pore structure could be postulated by heat treatment condition. Both crystallinity of TiO2 and pore structure of hybrid have effects on photocatalytic performance of TiO2-mounted ACC. It would be more attractive and prospective for the combination of TiO2 photocatalytic activity and adsorption ability of porous materials.