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Titanium-rich TS-1 zeolite for highly efficient oxidative desulfurization

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Green Energy & Environment 2023年第1期8卷 163-172页

作者： risheng bai Yue Song Ge Tian Fei Wang Avelino Corma Jihong Yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun130012China Instituto de Tecnología Química Universitat Politecnica de Valencia-Consejo Superior de Investigaciones CientíficasValencia46022Spain State Key Laboratory of Superhard Materials Jilin UniversityChangchun130012China International Center of Future Science Jilin UniversityChangchun130012China

The exploration of highly efficient catalysts based on nano-sized Ti-rich titanosilicate zeolites with controllable active titanium species is of great importance in zeolite catalytic ***,we reported an efficient and facile synthesis of nano-sized Ti-rich TS-1(MFI)zeolites by replacing tetrabutyl orthotitanate(TBOT)with tetrabutyl orthotitanate tetramer(TBOT-tetramer)as the titanium *** introduced TBOT-tetramer slowed down the zeolite crystallization process,and accordingly balanced the rate of incorporating Ti and the crystal growth and inhibited the massive formation of anatase ***,the prepared Ti-rich TS-1 zeolite sample had a Si/Ti as low as 27.6 in contrast to conventional one with a molar ratio of *** TBOT-tetramer endowed the titanosilicate zeolites with enriched active titanium species and enlarged external surface *** also impeded the formation of anatase species,resulting in superior catalytic behavior toward the oxidative desulfurization of dibenzothiophene compared with the conventional TS-1 zeolite counterpart prepared with TBOT.

关键词： TS-1 Zeolite Ti-rich Heterogeneous catalysis Oxidative desulfurization

Flower-like tin oxide membranes with robust three-dimensional channels for efficient removal of iron ions from hydrogen peroxide

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Chinese Journal of Chemical Engineering 2024年第1期65卷 1-7页

作者： risheng Shen Shilong Li Yuqing Sun Yuan bai Jian Lu Wenheng Jing State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 210009China National Energy Group Science and Technology Research Institute Co. Ltd.Nanjing 210023China

Membrane technology has become the mainstream process for the production of electronic grade hydrogen peroxide(H_(2)O_(2)).But due to the oxidation degradation of the organic membranes(***)by the strong oxidative radicals(e.g.OH)generated via the activation of H_(2)O_(2)by iron ions(Fe^(3+)),the short effective lifetime of membranes remains a *** nano tin oxide(SnO_(2))has great potential for the removal of Fe^(3+)in strongly oxidative H_(2)O_(2)because of its ability to stabilize H2O_(2)and preferentially adsorb Fe^(3+).Herein,we have designed for the first time a flower-like robust SnO_(2)membrane on the ceramic support by in situ template-free one-step hydrothermal *** three-dimensional loose pore structure in the membrane built by interlacing SnO_(2)nanosheets endows the SnO_(2)membrane with a high specific surface area and abundant adsorption sites(AOH).Based on the coordination complexation and electrostatic attraction between the SnO_(2)surface and Fe^(3+),the membrane shows a high Fe3+removal efficiency(83%)and permeability(24 L·m^(-2)·h^(-1)·MPa^(-1))in H_(2)O_(2).This study provides an innovative and simple approach to designing robust SnO_(2)membranes for highly efficient removal of Fe^(3+)in harsh environments,such as strong oxidation conditions.

关键词： Hydrogen peroxide SnO_(2)membrane Adsorption Hydrothermal

Anionic Tuning of Zeolite Crystallization

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CCS Chemistry 2021年第12期3卷 189-198页

作者： Chang Sun Zhiqiang Liu Shuang Wang Hao Pang risheng bai Qifei Wang Wei Chen Anmin Zheng Wenfu Yan Jihong Yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in WuhanWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071 College of Chemistry and Chemical Engineering Henan Province Function-Oriented Porous Materials Key LaboratoryLuoyang Normal UniversityLuoyang 471934 International Center of Future Science Jilin UniversityChangchun 130012

Zeolites are of great industrial relevance as catalysts,adsorbents,and ion-exchangers and typically synthesized under hydrothermal *** regulation of their crystallization process is of great significance for zeolite *** this work,we systematically investigate the role of anions in tuning zeolite crystallization via anion introduction including SO_(4)^(2−),F^(−),Cl^(−),Br^(−),I^(−),and SCN^(−) in the sodium form into the SiO2-TPAOH-H2O[tetrapropylammonium hydroxide(TPAOH)]synthetic system of silicalite-1 zeolite.

关键词： zeolite crystallization Hofmeister series anion effect structure-directing agent

Amino acid-assisted synthesis of TS-1 zeolites containing highly catalytically active TiO_(6)species

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Chinese Journal of Catalysis 2021年第12期42卷 2189-2196页

作者： Yuyao Wang Li Li risheng bai Shiqin Gao Zhaochi Feng Qiang Zhang Jihong Yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012JilinChina International Center of Future Science Jilin UniversityChangchun 130012JilinChina State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Tailoring the Ti coordination states in titanosilicate zeolites to simultaneously improve feedstock conversion and maximize the target product selectivity remains a challenge in the pursuit of high-performance catalysts for selective oxidation ***,we provide a facile strategy to synthesize hierarchical anatase-free TS-1(MFI-type)zeolites with tetrahedrally coordinated(TiO_(4))and octahedrally coordinated Ti species(TiO_(6)).The TiO_(4)species provide high epoxide selectivity,while the TiO_(6)species afford improved alkene *** strategy is achieved by synergistically using an L-lysine-assisted approach and a two-step crystallization;the two-step crystallization approach prevents the formation of anatase TiO_(2),while L-lysine stabilizes the TiO_(6)species and ensures efficient incorporation of TiO_(6)into the anatase-free TS-1 *** with their conventional counterparts,which only contain TiO_(4)species,the as-prepared TS-1 zeolites(Si/Ti=36.9)result in a higher 1-hexene conversion(33%),higher TON value(153),and comparable epoxide selectivity(95%).This synthetic strategy provides avenues to tailor the amount and distribution of Ti species in titanosilicate zeolites to achieve high catalytic performances in various processes.

关键词： TS-1 zeolites Ti species L-Lysine-assisted approach 1-Hexene epoxidation

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岩溶地区地面塌陷的发生规律及治理

土工基础 2001年第4期15卷 34-38页

作者：白日升铁道部第四勘测设计院武汉430063

对地面塌陷的形态特征 ,分布规律、形成机理做了探讨。地面塌陷的天然条件取决于岩溶发育程度、富水性的强弱 ,并受水位降低幅度、第四纪覆盖层厚度及岩性、地表水与地下水的水力联系。同时介绍了治理措施等。

关键词：岩溶土洞地面塌陷地表水

一步法合成CsPbBr3纳米晶及其荧光性能研究

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陶瓷学报 2020年第2期41卷 178-183页

作者：陈婷白日胜徐彦乔江伟辉江莞张筱君景德镇陶瓷大学江西景德镇333001 国家日用及建筑陶瓷工程技术研究中心江西景德镇333001

本文通过一步法制备了CsPbBr3钙钛矿结构纳米晶,利用X射线衍射仪、透射电子显微镜、紫外-可见分光光度计以及荧光光谱仪系统研究了反应温度、油酸(OA)与油胺(OLA)添加量对CsPbBr3纳米晶的物相结构、显微形貌和光学性质的影响。结果表明... 详细信息

本文通过一步法制备了CsPbBr3钙钛矿结构纳米晶,利用X射线衍射仪、透射电子显微镜、紫外-可见分光光度计以及荧光光谱仪系统研究了反应温度、油酸(OA)与油胺(OLA)添加量对CsPbBr3纳米晶的物相结构、显微形貌和光学性质的影响。结果表明,随着反应温度的逐渐升高,纳米晶的荧光强度逐渐增强;当反应温度为120℃时,纳米晶的荧光性能最佳;同时,反应温度的升高促进了纳米晶的生长,其粒径由22 nm增加至25 nm,因此发光峰位由518.4 nm红移至527.4 nm。此外,配体OA和OLA添加量对CsPbBr3纳米晶的荧光性能有着重要的影响,当OLA和OA添加量为溶剂的10%时,纳米晶的荧光性能最佳。

关键词：钙钛矿纳米晶荧光性能反应温度配体

一步法制备CsPbBr3/Cs4PbBr6复合纳米晶及其荧光性能研究

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人工晶体学报 2020年第2期49卷 252-258页

作者：陈婷胡泽浩徐彦乔白日胜江莞江伟辉谢志翔景德镇陶瓷大学材料科学与工程学院景德镇333001 国家日用及建筑陶瓷工程技术研究中心景德镇333001 东华大学材料科学与工程学院上海201620

通过一步法制备了全无机CsPbBr3/Cs4PbBr6钙钛矿复合纳米晶,采用X射线衍射仪(XRD)、透射电子显微镜(TEM)、紫外-可见分光光度计(UV-Vis)、荧光光谱仪(PL)对所制备的CsPbBr3/Cs4PbBr6复合纳米晶进行表征,并系统研究了一步法反应过程中反... 详细信息

通过一步法制备了全无机CsPbBr3/Cs4PbBr6钙钛矿复合纳米晶,采用X射线衍射仪(XRD)、透射电子显微镜(TEM)、紫外-可见分光光度计(UV-Vis)、荧光光谱仪(PL)对所制备的CsPbBr3/Cs4PbBr6复合纳米晶进行表征,并系统研究了一步法反应过程中反应温度、反应时间和Cs/Pb比对纳米晶的物相、形貌以及光学性能的影响规律。结果表明:所制备的样品为分散性较好、结晶度较高且呈立方块形貌的复合纳米晶,平均粒径约为20 nm。随反应温度升高以及反应时间延长,纳米晶的荧光强度呈先增加后减小的趋势;当反应温度为90℃、反应时间为30 min时,纳米晶的荧光性能最佳。此外,Cs/Pb比对纳米晶的物相组成和发光强度也具有较大的影响,随着Cs/Pb比增大,样品中Cs4PbBr6相含量逐渐增加,可对CsPbBr3纳米晶起到保护作用,因此样品的发光强度逐渐增强;当Cs/Pb=2:3时,样品的荧光强度达到最高值。然而,过大的Cs/Pb比例阻碍了CsPbBr3相的形成,造成了纳米晶荧光强度的降低。

关键词：一步法 CsPbBr3 纳米晶复合荧光性能

分子筛限域合成亚纳米双金属簇Pd-M（OH）2（M=Ni,Co）催化剂实现高效产氢

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科学新闻 2018年第4期 167-167页

作者： Qiming Sun Ning Wang Qiming Bing Rui Si Jingyao Liu risheng bai Peng Zhang Mingjun Jia 于吉红中国科学院吉林大学化学学院无机合成与制备化学国家重点实验室

文章简介课题组利用分子筛的纳米孔道限域效应,在水热条件下成功原位制备了纯硅分子筛Silicalite-1包覆亚纳米双金属Pd-M（OH）2（M=Ni,Co）的催化剂。球差校正透射电镜测试结果表明,双金属Pd-Ni（OH）2具有亚纳米尺寸,并限域在Silicali... 详细信息

文章简介课题组利用分子筛的纳米孔道限域效应,在水热条件下成功原位制备了纯硅分子筛Silicalite-1包覆亚纳米双金属Pd-M（OH）2（M=Ni,Co）的催化剂。球差校正透射电镜测试结果表明,双金属Pd-Ni（OH）2具有亚纳米尺寸,并限域在Silicalite-1分子筛的十元环交叉孔道。X射线吸收

关键词：双金属 M=Ni,Co 催化剂分子筛 OH Ni

第8版《美国癌症联合会肿瘤分期手册》胰腺癌分期更新要点的影像学解读

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中华消化外科杂志 2017年第4期16卷 336-340页

作者：潘瑶余日胜白雪莉梁廷波浙江大学医学院附属第二医院放射科杭州310009 浙江大学医学院附属第二医院肝胆胰外科杭州310009

胰腺癌是一种高度恶性肿瘤，病死率极高，手术切除是唯一可能治愈的治疗方案。影像学检查对胰腺癌的早期诊断及术前评估十分重要。准确的肿瘤分期对临床实践具有指导意义，可根据分期选择合适治疗方案，并判断患者的预后。近期美国癌症... 详细信息

胰腺癌是一种高度恶性肿瘤，病死率极高，手术切除是唯一可能治愈的治疗方案。影像学检查对胰腺癌的早期诊断及术前评估十分重要。准确的肿瘤分期对临床实践具有指导意义，可根据分期选择合适治疗方案，并判断患者的预后。近期美国癌症联合会（AJCC）对胰腺癌分期标准进行了更新，主要更新点在T分期和N分期，本文旨在从影像学角度对AJCC第8版胰腺癌TNM分期更新要点进行解读。

关键词：胰腺癌肿瘤分期影像学检查美国癌症联合会