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Pd/silicalite-1: An highly active catalyst for the oxidative removal of toluene

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Journal of Environmental Sciences 2022年第6期34卷 209-219页

作者： Linke Wu Jiguang deng Yuxi Liu Lin Jing Xiaohui Yu Xing Zhang Ruyi Gao wenbo Pei Xiuqing Hao Ali Rastegarpanah Hongxing Dai Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaLaboratory of Catalysis Chemistry and NanoscienceDepartment of Environmental Chemical EngineeringSchool of Environmental and Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

Catalytic combustion is thought as an efficient and economic pathway to remove volatile organic compounds, and its critical issue is the development of high-performance catalytic materials. In this work, we used the in situ synthesis method to prepare the silicalite-1(S-1)-supported Pd nanoparticles(NPs). It is found that the as-prepared catalysts displayed a hexagonal prism morphology and a surface area of 390-440 m^(2)/g. The sample(0.28Pd/S-1-H)derived after reduction at 500°C in 10 vol% H_(2)showed the best catalytic activity for toluene combustion(T50%= 180℃ and T90%= 189℃ at a space velocity of 40,000 m L/(g·hr), turnover frequency(TOFPd) at 160℃ = 3.46 × 10^(-3)sec^(-1), and specific reaction rate at 160℃ = 63.8μmol/(gPd·sec)), with the apparent activation energy(41 k J/mol) obtained over the bestperforming 0.28Pd/S-1-H sample being much lower than those(51-70 k J/mol) obtained over the other samples(0.28Pd/S-1-A derived from calcination at 500℃ in air, 0.26Pd/S-1-im derived from the impregnation route, and 0.27Pd/ZSM-5-H prepared after reduction at 500℃ in 10 vol% H_(2)). Furthermore, the 0.28Pd/S-1-H sample possessed good thermal stability and its partial deactivation due to CO_(2) or H_(2)O introduction was reversible, but SO_(2) addition resulted in an irreversible deactivation. The possible pathways of toluene oxidation over 0.28Pd/S-1-H was toluene → p-methylbenzoquinone → maleic anhydride, benzoic acid, benzaldehyde → carbon dioxide and water. We conclude that the good dispersion of Pd NPs, high adsorption oxygen species concentration, large toluene adsorption capacity, strong acidity,and more Pd~0 species were responsible for the good catalytic performance of 0.28Pd/S-1-H.

关键词： Silicalite-1 Hexagonal prism shape Supported palladium catalyst Volatile organic compound Toluene combustion

Rare earth oxides and their supported noble metals in application of environmental catalysis

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Journal of Rare Earths 2020年第8期38卷 819-839,I0001页

作者： Zhiquan Hou wenbo Pei Xing Zhang Kunfeng Zhang Yuxi Liu Jiguang deng Lin Jing Hongxing Dai Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaLaboratory of Catalysis Chemistry and NanoscienceDepartment of Chemistry and Chemical EngineeringCollege of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China

Volatile organic compounds(VOCs),methane,carbon monoxide,soot,automotive exhaust,and nitrogen oxides are harmful to the atmosphere and human health.It is urgent to strictly control their emissions.Heterogeneous catalysis is an effective pathway for the removal of these pollutants,and the critical issue is the development of novel and high-performance catalysts.In this review,we briefly summarize the preparation methods,physicochemical properties,catalytic activities,and related reaction mechanisms for the above pollutants removal of the rare earth oxides,mixed rare earth oxide,rare earth oxidesupported noble metal,and mixed rare earth oxide-supported noble metal catalysts that have been investigated by our group and other researchers.It was found that catalytic performance was associated with the factors,such as specific surface area,pore structure,particle size and dispersion,adsorbed oxygen species concentration,reducibility,reactant activation ability or interaction between metal nanoparticles and support.Furthermore,we also envision the development trend of such a topic in future work.

关键词： Volatile organic compound Atmospheric pollutant Rare earth oxide Mixed rare earth oxide Supported noble metal catalyst Porous mixed rare earth oxide

Corneal subbasal nerve fiber regeneration in myopic patients after laser in situ keratomileusis

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Neural Regeneration Research 2012年第20期7卷 1556-1562页

作者： Shijing deng Mengmeng Wang Fengju Zhang Xuguang Sun wenbo Hou Ning Guo Beijing Institute of Ophthalmology Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing 100005 China Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing 100005 China

A total of 26 myopic patients （52 eyes） underwent laser in situ keratomileusis. In vivo confocal microscopy revealed that most of the regenerated corneal subbasal nerve fibers in the comeal flap originated from the stump of corneal subbasal nerve fibers outside the ablation zone and extended towards the center of the cornea in all patients. Meanwhile, new fibers were also found to directly regenerate from deep in the stroma in some cases. Approximately 94% of regenerated corneal subbasal nerve fibers （73/78 eyes） regrew vertically into the peripheral central 6-mm circle area 1 month after surgery, 78% （28/36 eyes） grew into the central 3 6 mm area at 2 months, and 23% into the central 3-mm circle area at 3 months. In addition, there was no significant difference in corneal subbasal nerve fiber regenerative capacity between the basic fibroblast growth factor group and the 20% （vN） deproteinized extract of calf blood group. The majority of corneal subbasal nerve fiber regeneration occurred from the stump of corneal subbasal nerve fibers outside the corneal flap and the remaining growth occurred deep within the stroma.

关键词： subbasal nerve fibers confocal microscopy cornea regeneration keratomileusis basic fibroblastgrowth factor neural regeneration

Powder metallurgy synthesis of porous Ni-Fe alloy for oxygen evolution reaction and overall water splitting

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Journal of Materials Science & Technology 2020年第2期37卷 154-160页

作者： wenbo Li Qingfeng Hu Yunwei Liu Mengmeng Zhang Jiajun Wang Xiaopeng Han Cheng Zhong Wenbin Hu Yida deng Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300072China School of Chemical Engineering and Technology Collaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300072China

Developing inexpensive and high efficient catalysts is essential for generating oxygen and hydrogen via water splitting.Herein,based on powder metallurgy,a Ni-Fe based compound(Ni8Fe2 alloy)with unique porous structure and controllable phase has been designed and synthesized.Without using a solvent or template,the alloy exhibits a porous structure with uniformly distributed multi-phase.The obtained Ni8Fe2 alloy exhibits an efficient oxygen evolution reaction(OER)performance and good longterm stability in alkaline electrolyte(i.e.1.0 M KOH).Additionally,an alkaline water splitting device has been assembled using porous Ni8Fe2 alloy as both anode and cathode materials.The system requires a cell voltage of 1.65 V to reach the 10 mA cm-2 current density for overall water splitting and maintains good stability for 25 h.The efficient electrocatalytic performance of the Ni8Fe2 alloy is owing to the unique porous microstructure,increased active sites and accelerated charge transfer.Consequently,the reaction kinetics of OER are significantly promoted.

关键词： Water splitting Oxygen evolution reaction Ni-Fe alloy Porous structure

Accelerated fracture healing by osteogenic Ti45Nb implants through the PI3K–Akt signaling pathway

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Bio-Design and Manufacturing 2023年第6期6卷 718-734页

作者： Jia Tan Jiaxin Li Zhaoyang Ran Junxiang Wu Dinghao Luo Bojun Cao Liang deng Xiaoping Li wenbo Jiang Kai Xie Lei Wang Yongqiang Hao Shanghai Key Laboratory of Orthopaedic Implants Department of Orthopaedic SurgeryShanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China Department of Orthopedics The Second Affiliated Hospital of Harbin Medical UniversityHarbin 150001China Clinical and Translational Research Center for 3D Printing Technology Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China Ningxia Orient Ta Ind Co. Ltd.Shizuishan 753000China

The key to managing fracture is to achieve stable internal fixation,and currently,biologically and mechanically appropriate internal fixation devices are urgently needed.With excellent biocompatibility and corrosion resistance,titanium–niobium alloys have the potential to become a new generation of internal fixation materials for fractures.However,the role and mechanism of titanium–niobium alloys on promoting fracture healing are still undefined.Therefore,in this study,we systematically evaluated the bone-enabling properties of Ti45Nb via in vivo and in vitro experiments.In vitro,we found that Ti45Nb has an excellent ability to promote MC3T3-E1 cell adhesion and proliferation without obvious cytotoxicity.Alkaline phosphatase(ALP)activity and alizarin red staining and semiquantitative analysis showed that Ti45Nb enhanced the osteogenic differentiation of MC3T3-E1 cells compared to the Ti6Al4V control.In the polymerase chain reaction experiment,the expression of osteogenic genes in the Ti45Nb group,such as ALP,osteopontin(OPN),osteocalcin(OCN),type 1 collagen(Col-1)and runt-related transcription factor-2(Runx2),was significantly higher than that in the control group.Meanwhile,in the western blot experiment,the expression of osteogenic-related proteins in the Ti45Nb group was significantly increased,and the expression of PI3K–Akt-related proteins was also higher,which indicated that Ti45Nb might promote fracture healing by activating the PI3K–Akt signaling pathway.In vivo,we found that Ti45Nb implants accelerated fracture healing compared to Ti6Al4V,and the biosafety of Ti45Nb was confirmed by histological evaluation.Furthermore,immunohistochemical staining confirmed that Ti45Nb may promote osteogenesis by upregulating the PI3K/Akt signaling pathway.Our study demonstrated that Ti45Nb exerts an excellent ability to promote fracture healing as well as enhance osteoblast differentiation by activating the PI3K/Akt signaling pathway,and its good biosafety has been confirmed,which indicates its clinical translation potent

关键词： Fracture healing Ti45Nb alloy PI3K–Akt pathway Orthopedic implant

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巨噬细胞在早产中的功能研究进展

中国医师杂志 2023年第9期25卷 1294-1300页

作者：朱思静邓文波厦门大学医学院厦门361104

早产是现代产科面临的主要挑战之一,目前仍然缺乏有效的治疗方法。成功的妊娠过程依赖于母胎界面的免疫平衡,由于巨噬细胞表面独特的抗原呈递分子和免疫识别受体,其在母胎免疫耐受中发挥关键作用。子宫巨噬细胞的功能障碍可导致多种不... 详细信息

早产是现代产科面临的主要挑战之一,目前仍然缺乏有效的治疗方法。成功的妊娠过程依赖于母胎界面的免疫平衡,由于巨噬细胞表面独特的抗原呈递分子和免疫识别受体,其在母胎免疫耐受中发挥关键作用。子宫巨噬细胞的功能障碍可导致多种不良妊娠结局。本篇综述总结了巨噬细胞的起源、在子宫微环境中的特化、不同妊娠阶段的生理功能和在早产中发挥作用的最新研究进展。

关键词：早产巨噬细胞妊娠

Sequential activation of uterine epithelial IGF1R by stromal IGF1 and embryonic IGF2 directs normal uterine preparation for embryo implantation

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Journal of Molecular Cell Biology 2021年第9期13卷 646-661页

作者： Chan Zhou Meiying Lv Peike Wang Chuanhui Guo Zhangli Ni Haili Bao Yedong Tang Han Cai Jinhua Lu Wenbo Deng Xiaoyu Yang Guoliang Xia Haibin Wang Chao Wang Shuangbo Kong State Key Laboratory of Agrobiotechnology College of Biological SciencesChina Agricultural UniversityBeijingChina'2 Fujian Provincial Key Laboratory of Reproductive Health ResearchSchool of MedicineXiamen UniversityXiamenChina'3 Fuzhou Hospital of Traditional Chinese Medicine Affiliated to Fujian University of Traditional Chinese MedicineFuzhouChina'4 Department of Obstetrics and GynecologyThe First Affiliated Hospital of Xiamen UniversityXiamenChina'5 Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in the Western ChinaCollege of Life ScienceNingXia UniversityYinchuanChina

Embryo implantation in both humans and rodents is initiated by the attachment of a blastocyst to the uterine epithelium.For blastocyst attachment,the uterine epithelium needs to transform at both the structural and molecular levels first,and then initiate the interaction with trophectoderm.Any perturbation during this process will result in implantation failure or long-term adverse pregnancy outcomes.Endocrine steroid hormones,which function through nuclear receptors,combine with the local molecules produced by the uteri or embryo to facilitate implantation.The insulin-like growth factor(IGF)signaling has been reported to play a vital role during pregnancy.However,its physiological function during implantation remains elusive.This study revealed that mice with conditional deletion of Igflr gene in uteri suffered from subfertility,mainly due to the disturbed uterine receptivity and abnormal embryo implantation.Mechanistically,we uncovered that in response to the nidatory estrogen on D4 of pregnancy,the epithelial IGF1R,stimulated by the stromal cell-produced IGF1,facilitated epithelial STAT3 activation to modulate the epithelial depolarity.Furthermore,embryonic derived IGF2 could activate both the epithelial ERK1/2 and STAT3 signaling through IGF1R,which was critical for the transcription of Cox2 and normal attachment reaction.In brief,our data revealed that epithelial IGF1R was sequentially activated by the uterine stromal IGF1 and embryonic IGF2 to guarantee normal epithelium differentiation during the implantation process.

关键词： IGF1R IGF1 IGF2 uterine epithelium implantation blastocyst

Genome Characterization of the First Outbreak of COVID-19 Delta Variant B.1.617.2——Guangzhou City,Guangdong Province,China,May 2021

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China CDC weekly 2021年第27期3卷 587-589页

作者： Zhencui Li Kai Nie Kuibiao Li Yao Hu Yang Song Min Kang Meng Zhang Xiaoling deng Jun Yuan wenbo Xu Baisheng Li Guangdong Provincial Center for Disease Control and Prevention GuangzhouGuangdongChina Guangdong Workstation for Emerging Infectious Disease Control and Prevention Chinese Academy of Medical SciencesGuangzhouGuangdongChina National Institute for Viral Disease Control and Prevention China CDCBeijingChina Guangzhou Center for Disease Control and Prevention GuangzhouGuangdongChina

On May 20,2021,75-year-old female(Case A)went to a local hospital due to pharyngeal pain and low-grade fever in Liwan District,Guangzhou City,Guangdong Province.The oropharyngeal swab from Case A tested preliminarily positive for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)/coronavirus disease 2019(COVID-19)virus using a quantitative real-time reverse transcription polymerase chain reaction(RT-qPCR)method after a hospital visit.

关键词： Province. Guangzhou Guangdong

经济区规划促进经济共同增长吗?——基于合成控制法对海西经济区的实证研究

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肇庆学院学报 2020年第4期41卷 30-35页

作者：邓文博河源职业技术学院工商管理学院广东河源517000 澳门科技大学商学院澳门999078

在区域经济协调发展受到高度关注的背景下,经济区发展规划是否促进地区经济共同增长值得深入探讨。文章收集了2004—2018年中国省际面板数据,运用合成控制法对海西经济区规划的经济效应进行实证研究。结果表明:海西经济区规划对福建省... 详细信息

在区域经济协调发展受到高度关注的背景下,经济区发展规划是否促进地区经济共同增长值得深入探讨。文章收集了2004—2018年中国省际面板数据,运用合成控制法对海西经济区规划的经济效应进行实证研究。结果表明:海西经济区规划对福建省产生了正向冲击;对粤东4市和赣东南4市产生了负向冲击;而浙南3市先受到负向冲击,后受到了正向冲击。文章基于研究结论提出了政策建议。

关键词：区域一体化经济增长合成控制法