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TiO_2/Ag modified penta-bismuth hepta-oxide nitrate and its adsorption performance for azo dye removal

Journal of Environmental Sciences 2012年第10期24卷 1876-1884页

作者： Eshraq Ahmed Abdullah Abdul Halim Abdullah Zulkarnain Zainal Mohd Zobir Hussein tan kar ban Department of Chemistry Faculty of ScienceUniversiti Putra Malaysia43400UPM SerdangSelangorMalaysia. Advanced Material and Nanotechnology Laboratory Institute of Advanced TechnologyUniversiti Putra Malaysia43400UPM SerdangSelangorMalaysia

A modified hydrophilic penta-bismuth hepta-oxide nitrate （Bi5O7NO3） surface was synthesized via a precipitation method using TiO2 and Ag as modified agents. The synthesized product was characterized by different analytical techniques. The removal efficiency was evaluated using mono- and di-sulphonated azo dyes as model pollutants. Different kinetic, isotherm and diffusion models were chosen to describe the adsorption process. X-ray photoelectron spectroscopy （XPS） results revealed no noticeable differences in the chemical states of modified adsorbent when compared to pure BisOTNO3; however, the presence of hydrophilic centres such as TiO2 and Ag developed positively charged surface groups and improved its adsorption performance to a wide range of azo dyes. Dyes removal was found to be a function of adsorbent dosage, initial dye concentration, solution pH and temperature. The reduction of Langmuir 1,2-mixed order kinetics to the second or first-order kinetics could be successfully used to describe the adsorption of dyes onto the modified adsorbent. Mass transfer can be described by intra-particle diffusion at a certain stage, but it was not the rate limiting step that controlled the adsorption process. Homogenous behavior of adsorbent surface can be explored by applying Langmuir isotherm to fit the adsorption data.

关键词： Bi5O7NO3 X-ray photoelectron spectroscopy Langmuir 1,2-mixed order azo dye mass transfer

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A review of MXene-derived quantum dots:Synthesis,characterization,properties,and applications

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Particuology 2024年第8期91卷 50-71页

作者： Chunhe Zhou kar ban tan Wenjuan Han Li Wang Ming Lu The Joint Laboratory of MXene Materials Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of EducationJilin Normal UniversityChangchunJilin 130103China Department of Chemistry Faculty of ScienceUniversiti Putra MalaysiaSerdangSelangor 43400Malaysia

Cutting MXene to a minimum size and forming the derived two-dimensional MXene quantum dots(MQDs),which possess a unique intrinsic layered geometry structure,restricts exciton due to their novel spatial *** gives rise to a broad spectrum of fascinating properties,rendering them for various ***,the correlation between composition,structure,and processing control of MQDs is investigated systematically,giving further insight into the intrinsic and extrinsic *** review also provides an opportunity to explore new compositions,modify the properties,and tailor MQDs into the guided architectural design before any prospective applications.

关键词： MXene Quantum dots Characterization Properties Applications

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NOD2/CARD15基因突变与克罗恩病的发病及其表型的关系:在以色列阿拉伯裔克罗恩病患者群中的发现

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世界核心医学期刊文摘（胃肠病学分册） 2006年第1期2卷 11-11页

作者： kar-ban A. Atia O. Leitersdorf E. 程欣 GastroenterologyDepartment RambamMedical Center Haifa Israel Dr.

The prevalence of Crohn’ s disease depends on geographic location and racial background. Arg702Trp, Gly908Arg, and Leu1007fsinsC mutations in the NOD2/CARD15 gene are associated with Crohn’ s disease in Caucasians. The mutation rate among Israeli Jewish patients is 27% - 41% . The prevalence of Crohn’ s disease is much lower in the Israeli Arab compared to the Israeli Jewish population. We studied the NOD2/CARD15 mutation rate and disease phenotype (according to the Vienna classification) among the Israeli Arabs and compared them with those in an Israeli Jewish cohort. We recruited 66 Israeli Arab patients and 122 ethnically matched controls. Five patients (8.2% ) and three controls (2.3% ) carried one NOD2/CARD15 mutation. The phenotypic characteristics of the Arab and Jewish patients were very similar. We conclude that NOD2/CARD15 mutations do not contribute to Crohn’ s susceptibility in the Israeli Arab population and suggest that NOD2/CARD15 mutations have an important effect on Crohn’ s prevalence within a specific population but not on the phenotype.

关键词：克罗恩病 NOD2/CARD15 患者群基因突变伯裔 CARD 高加索人易患性犹太裔人群分

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