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Tricrystalline TiO_2 with enhanced photocatalytic activity and durability for removing volatile organic compounds from indoor air

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Journal of Environmental Sciences 2015年第6期27卷 189-195页

作者： kunyang chen Lizhong Zhu Kun Yang Department of Environmental Science Zhejiang University Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control

It is important to develop efficient and economic techniques for removing volatile organic compounds（VOCs） in indoor air. Heterogeneous Ti O2-based semiconductors are a promising technology for achieving this goal. Anatase/brookite/rutile tricrystalline Ti O2 with mesoporous structure was synthesized by a low-temperature hydrothermal route in the presence of *** obtained samples were characterized by X-ray diffraction and N2 adsorption-desorption isotherm. The photocatalytic activity was evaluated by photocatalytic decomposition of toluene in air under UV light illumination. The results show that tricrystalline Ti O2 exhibited higher photocatalytic activity and durability toward gaseous toluene than bicrystalline Ti O2,due to the synergistic effects of high surface area, uniform mesoporous structure and junctions among mixed phases. The tricrystalline Ti O2 prepared at R HNO3= 0.8, containing80.7% anatase, 15.6% brookite and 3.7% rutile, exhibited the highest photocatalytic activity,about 3.85-fold higher than that of P25. The high activity did not significantly degrade even after five reuse cycles. In conclusion, it is expected that our study regarding gas-phase degradation of toluene over tricrystalline Ti O2 will enrich the chemistry of the Ti O2-based materials as photocatalysts for environmental remediation and stimulate further research interest on this intriguing topic.

关键词： VOC Photocatalysis Tricrystalline TiO2 Nanomaterials Mesoporous Gaseous

Acid-assisted hydrothermal synthesis of nanocrystalline TiO_2 from titanate nanotubes: Influence of acids on the photodegradation of gaseous toluene

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Journal of Environmental Sciences 2015年第1期27卷 232-240页

作者： kunyang chen Lizhong Zhu Kun Yang Department of Environmental Science Zhejiang University Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control

In order to efficiently remove volatile organic compounds（VOCs） from indoor air, onedimensional titanate nanotubes（Ti NTs） were hydrothermally treated to prepare TiO2 nanocrystals with different crystalline phases, shapes and sizes. The influences of various acids such as CH3 COOH, HNO3, HCl, HF and H2SO4 used in the treatment were separately compared to optimize the performance of the TiO2 nanocrystals. Compared with the strong and corrosive inorganic acids, CH3COOH was not only safer and more environmentally friendly, but also more efficient in promoting the photocatalytic activity of the obtained TiO2. It was observed that the anatase TiO2 synthesized in 15 mol/L CH3COOH solution exhibited the highest photodegradation rate of gaseous toluene（94%）, exceeding that of P25（44%） by a factor of more than two. The improved photocatalytic activity was attributed to the small crystallite size and surface modification by CH3COOH. The influence of relative humidity（20%–80%） on the performance of TiO2 nanocrystals was also studied. The anatase TiO2 synthesized in 15 mol/L CH3COOH solution was more tolerant to moisture than the other TiO2 nanocrystals and P25.

关键词： Titanate nanotubes CH3COOH Ti O2nanocrystals Photocatalytic Gaseous toluene

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人工智能书架在图书馆的应用与发展

办公自动化 2024年第16期29卷 78-80页

作者：陈坤阳舒琸栋齐齐哈尔医学院齐齐哈尔161006

近年来,人工智能技术日益成熟,在各个行业和领域都得到非常广泛的应用,为现代人的工作与生活带来诸多便利。人工智能书架是近年来人工智能技术在图书馆、数字出版、数字图书馆等领域的重要应用,人工智能书架在推进图书馆数字化转型过程... 详细信息

近年来,人工智能技术日益成熟,在各个行业和领域都得到非常广泛的应用,为现代人的工作与生活带来诸多便利。人工智能书架是近年来人工智能技术在图书馆、数字出版、数字图书馆等领域的重要应用,人工智能书架在推进图书馆数字化转型过程中扮演着重要的角色。人工智能书架在图书馆中的核心应用,包括个性化图书推荐、阅读辅助服务、资源调配和图书档案管理等功能,并总结人工智能书架的发展可能面临的风险和挑战,如数据隐私、技术误判、人机关系、伦理和法律问题等。最后,总结人工智能书架在图书馆领域的应用和发展。

关键词：人工智能智能图书馆智能服务

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城市轨道交通基础设施隐含碳排放研究综述

现代隧道技术 2024年第4期61卷 1-13页

作者：陈湘生陈坤阳邱桐王雷何秋凤赖亚妮陈武雄付艳斌深圳大学土木与交通工程学院未来地下城市研究院深圳518061 滨海城市韧性基础设施教育部重点实验室(深圳大学) 深圳518060 深圳市地铁地下车站绿色高效智能建造重点实验室深圳518060 深圳中建院建筑科技有限公司深圳518057

城市轨道交通基础设施碳排放的定量研究已经成为交通运输领域低碳建设的关注焦点。以Web of Science(WOS)核心数据库和中国知网数据库为基础,对城市轨道交通基础设施碳排放的定量研究进行系统性综述与分析,从研究方法和影响因素2个方面... 详细信息

城市轨道交通基础设施碳排放的定量研究已经成为交通运输领域低碳建设的关注焦点。以Web of Science(WOS)核心数据库和中国知网数据库为基础,对城市轨道交通基础设施碳排放的定量研究进行系统性综述与分析,从研究方法和影响因素2个方面对样本文献进行深入分析与归纳,共涉及4种类型基础设施的碳排放,具体包括地铁系统(包括隧道和车站)、轻轨系统、市域快速轨道交通系统和有轨电车系统。首先对关于碳排放计算的文献的研究方法、目标与范围界定、功能单位和清单数据进行比较,确定研究方法的适用范围,并对数据来源进行分类;其次,确定并分析影响城市轨道交通基础设施隐含碳排放的关键因素;最后,讨论现有研究的不足。研究结果可为城市轨道交通基础设施碳排放核算标准化提供参考。

关键词：城市轨道交通基础设施生命周期评价隐含碳排放影响因素

Recombination and repeat-induced point mutation landscapes reveal trade-offs between the sexual and asexual cycles of Magnaporthe oryzae

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Journal of Genetics and Genomics 2024年第7期51卷 723-734页

作者： Xifang Zong Yaxin Lou Mengshuang Xia kunyang Zhao Jingxuan chen Ju Huang Sihai Yang Long Wang State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing UniversityNanjingJiangsu 210000China State Key Laboratory for Crop Genetics and Germplasm Enhancement Bioinformatics CenterAcademy for Advanced Interdisciplinary StudiesNanjing Agricultural UniversityNanjingJiangsu 210000China Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjingJiangsu 210000China

The fungal disease caused by Magnaporthe oryzae is one of the most devastating diseases that endanger many crops *** shows that sexual reproduction can be advantageous for fungal diseases as hybridization facilitates ***,the pervasive clonal lineages of *** observed in natural fields contradict this expectation.A better understanding of the roles of recombination and the fungi-specific repeat-induced point mutation(RIP)in shaping its evolutionary trajectory is essential to bridge this knowledge *** we systematically investigate the RIP and recombination landscapes in *** using a whole genome sequencing data from 252 population samples and 92 cross *** data reveal that the RIP can robustly capture the population history of ***,and we provide accurate estimations of the recombination and RIP rates across different *** ***,our results highlight a parent-of-origin bias in both recombination and RIP rates,tightly associating with their sexual potential and variations of effector *** bias suggests a critical trade-off between generating novel allelic combinations in the sexual cycle to facilitate host-jumping and stimulating transposon-associated diversification of effectors in the asexual cycle to facilitate host *** findings provide unique insights into understanding the evolution of blast fungus.

关键词： Magnaporthe oryzae Crossover Repeat-induced point mutation(RiP) Effectors Sexual reproduction

Design,Testing and Control of a Magnetorheological Damper for Knee Prostheses

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Journal of Bionic Engineering 2024年第4期21卷 1788-1800页

作者： Hounan Song Yu Cao Wei chen Lei Ren Yongxin Ma kunyang Wang Xu Wang Yao Zhang Luquan Ren Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun130022People’s Republic of China Department of Mechanical Aerospace and Civil EngineeringThe University of ManchesterManchesterM139PLUK

This study aims to develop a magnetorheological(MR)damper for semi-active knee prostheses to restore the walking ability of transfemoral *** core dimensions of the MR damper were determined via theoretical magnetic field calculations,and the theoretical relationship between current and joint torque was derived through electromagnetic ***,a physical prototype of the semi-active prosthetic knee equipped with the MR damper was *** on the data obtained from angle sensor,pressure sensor(loadcell),and inertial measurement unit(IMU)on the prosthesis,a matching control algorithm is *** joint torque of the MR damper can be adaptively adjusted according to the walking speed of the amputee,allowing the amputee to realize a natural *** effectiveness of the control program was verified by the ADAMS and MATLAB *** results of the test and simulation show that the MR damper can provide sufficient torque needed for normal human activities.

关键词： Semi-active knee prosthesis Magnetorheological damper Theoretical analysis ADAMS and MATLAB co-simulation

湿式电除尘器冲洗废水排入脱硫系统的影响分析

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中国电机工程学报 2018年第6期38卷 1743-1750页

作者：曹蕃郭婷婷金绪良陈坤洋中国大唐集团科学技术研究院有限公司火力发电技术研究所

采用测试分析方法,从水质分析、表面张力测试、重金属含量测试3个方面进行研究,比较分析不同类型的湿式电除尘器冲洗废水对脱硫吸收塔浆液品质及脱硫系统运行的影响。结果表明：湿式电除尘器冲洗废水中的Ca^2＋、Mg^2＋和Cl^-浓度较高,... 详细信息

采用测试分析方法,从水质分析、表面张力测试、重金属含量测试3个方面进行研究,比较分析不同类型的湿式电除尘器冲洗废水对脱硫吸收塔浆液品质及脱硫系统运行的影响。结果表明：湿式电除尘器冲洗废水中的Ca^2＋、Mg^2＋和Cl^-浓度较高,但不会对脱硫塔内离子平衡产生影响;湿式电除尘器冲洗废水的表面张力低于吸收塔浆液,排入脱硫塔后加剧了吸收塔浆液起泡;湿式电除尘器冲洗废水中重金属含量较少,不会对脱硫系统正常运行造成影响,但可能存在因极板腐蚀造成冲洗废水中Cr和Ni含量较高的风险,排入脱硫塔后容易对吸收塔浆液品质和脱硫废水处理系统的运行产生不利影响。

关键词：燃煤机组超低排放湿式电除尘器冲洗废水湿法脱硫重金属

公共场所BTEX的污染特征、源解析及健康风险

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环境科学学报 2007年第5期27卷 779-784页

作者：张平陈坤洋朱利中沈学优浙江大学环境科学系杭州310028

分析评价了杭州市商场、超市、影院、车站候车室等公共场所室内空气中BTEX的污染特征、来源及健康风险.结果表明,公共场所中BTEX的总平均浓度为30.68～217.74μg·m-3,商场的污染最重,车站候车室的污染最轻;甲苯与BTEX总浓度之间具有较... 详细信息

分析评价了杭州市商场、超市、影院、车站候车室等公共场所室内空气中BTEX的污染特征、来源及健康风险.结果表明,公共场所中BTEX的总平均浓度为30.68～217.74μg·m-3,商场的污染最重,车站候车室的污染最轻;甲苯与BTEX总浓度之间具有较好的线性关系,可作为公共场所BTEX污染的代表物;候车室BTEX污染主要受室外污染源的影响,而在其它公共场所中,室内污染源占主导地位,鞋用胶粘剂是商场BTEX的主要污染来源;商场空气中苯对男性和女性工作人员的致癌风险分别为5.38×10-6和5.57×10-6,超过了美国EPA制定的人体致癌风险值(1×10-6).

关键词： BTEX 污染特征源解析健康风险

超低排放改造后燃煤烟气净化设备协同脱汞潜力分析

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中国电力 2018年第6期51卷 160-165页

作者：陈坤洋郭婷婷王海刚胡冬中国大唐集团科学技术研究院有限公司火力发电技术研究院北京100040

燃煤机组完成超低排放改造后,原有的烟气净化设备在设备容量、装备水平上有较大提升。为了给汞排放治理提供决策依据,分析了超低排放改造后烟气净化设备的汞脱除潜力。研究结果表明:SCR烟气脱硝系统改造能够增大Hg^0的氧化效率,因而能... 详细信息

燃煤机组完成超低排放改造后,原有的烟气净化设备在设备容量、装备水平上有较大提升。为了给汞排放治理提供决策依据,分析了超低排放改造后烟气净化设备的汞脱除潜力。研究结果表明:SCR烟气脱硝系统改造能够增大Hg^0的氧化效率,因而能促进后续烟气净化设备的脱汞效率;低低温电除尘和电袋复合除尘技术的协同脱汞效率显著,可达40%;安装高效除尘除雾器的脱硫塔对汞的协同脱除效率可达96%。然而,由于超低排放改造后除尘器出口Hg2+含量低,且粉尘浓度低、粒径小,脱硫系统单塔提效增容改造及湿式电除尘器对烟气中汞的脱除效率影响有限;还有可能出现单塔提效增容改造后脱硫系统出口汞的排放浓度较入口略有增加的情况。

关键词：燃煤机组烟气汞超低排放净化设备 SCR脱硝装置低低温电除尘电袋复合除尘高效除尘除雾器湿式电除尘器