关乃佳
(1)新型纳米催化材料的制备科学基础研究;(2)非均相催化反应及在能源,环保中的应用研究;(3)石油化工与精细化工中的基本有机合成应用研究; (4) 水中有机无机污染物的光催化净化。
个性化签名
- 姓名:关乃佳
- 目前身份:
- 担任导师情况:
- 学位:
-
学术头衔:
博士生导师,
- 职称:-
-
学科领域:
物理化学
- 研究兴趣:(1)新型纳米催化材料的制备科学基础研究;(2)非均相催化反应及在能源,环保中的应用研究;(3)石油化工与精细化工中的基本有机合成应用研究; (4) 水中有机无机污染物的光催化净化。
关乃佳,女,满族,1981年毕业于南开大学化学系物理化学专业获理学学士学位;1984年毕业于南开大学化学系催化专业获理学硕士学位;1991年毕业于德国波鸿鲁尔大学化学系化工专业获自然科学博士学位。现为南开大学物理化学教授,博士生导师,现任化学学院院长、南开大学校长助理,南开大学纳米科学与技术研究中心主任,天津市化学会理事长,天津市政协委员,《石油化工》、《催化学报》编委,美国化学会会员,享受政府特殊津贴。关乃佳教授的研究兴趣主要包括:新型纳米氧化物催化材料、负载型金属催化材料和分子筛等催化材料合成及其在能源,环保中的应用,如低碳烷烃的综合利用,汽车尾气净化,饮用水中硝酸盐的净化等等。研究方向主要有:(1)新型纳米催化材料的制备科学基础研究;(2)非均相催化反应及在能源,环保中的应用研究;(3)石油化工与精细化工中的基本有机合成应用研究; (4) 水中有机无机污染物的光催化净化。研究方法包括:催化剂制备方法、催化反应评价、催化剂组成、酸碱性与结构等物性的仪器表征、催化反应动力学研究等。曾负责承担973项目、863项目、国家自然科学基金重点项目、国家教育部重点科技项目、市自然科学基金项目、市科委国际合作项目、教育部骨干教师资助计划、国际合作项目等共十余项;参与中国石化总公司开发项目3项。在重要学术刊物上发表论文90余篇,出版专著1册,申请专利5项,授权专利1项。 2000年被评为天津市“三八”红旗手;1999年被评为天津市“九五”立功先进个人和“三育人”先进个人;1998年获南开大学优秀党员称号; 1997年获南开大学摩托罗拉优秀青年教师特等奖。
-
主页访问
2633
-
关注数
0
-
成果阅读
376
-
成果数
9
关乃佳, Fuxiang Zhang, †, Jixin Chen, Xiu Zhang, Wenliang Gao, Ruicai Jin, Naijia Guan, *, † and Yuzhuo Li*, ‡
Langmuir 2004, 20, 9329-9334,-0001,():
-1年11月30日
Solid-supported metal catalysts have been widely used in industrial processes. The morphology of coated metal on the support is usually an important factor affecting the efficiency of the catalyst. In this study, a photocatalytic process is utilized to control the morphology of platinum particles deposited on titania (Degussa P-25). More specifically, the effect of pH on the morphology and the valence state of platinum nanoparticles was systemically investigated. It is found that, via a simple pH-controlled process, various states of platinum (Pt0, PtⅡO, or PtⅣO2) can be deposited onto the support directly at will. In this paper, the mechanism of morphology control and the key influencing factors at different pH regimes will be discussed. Followed by photodeposition, a H2 thermal treatment process was employed to convert the oxides into metal platinum with narrow size distribution and even coverage on the supporting titania. Various techniques such as transmission electron microscopy, high-resolution transmission electron microscopy, energy-dispersive analysis of X-rays, and X-ray photoelectron spectroscopy were employed to characterize the prepared titania-supported platinum particles.
-
31浏览
-
0点赞
-
0收藏
-
0分享
-
321下载
-
0评论
-
引用
关乃佳, Ruicai Jin, Wenliang Gao, Jixin Chen, Haisheng Zeng, Fuxiang Zhang, Zhiguang Liu, Naijia Guan∗
Journal of Photochemistry and Photobiology A: Chemistry 162(2004)585-590,-0001,():
-1年11月30日
Photocatalytic reduction of nitrate ions was examined by using Cu/MgTiO3-TiO2 catalyst in the presence of sodium oxalate as hole scavenger. Many factors such as catalyst calcination temperature, Cu: Mg atom molar ratio, different hole scavengers and different concentrations of sodium oxalate were tested to search for the optimal reaction conditions. X-ray diffraction (XRD) and Transmission Electron Micrograph (TEM) were performed to characterize the composite semiconductors catalyst. Our results indicated that Cu/MgTiO3-TiO2 catalyst calcined at 873K showed the highest photocatalytic activity and nitrate conversion reached 39.2% after 2 h irradiation. The enhanced effect for photocatalytic nitrate reduction activity was most likely to result from the formation of composite semiconductor MgTiO3-TiO2 and the transformation of TiO2 crystalline phase.
Nitrate, Photocatalytic reduction, Composite semiconductor, Cu/, MgTiO3-TiO2 catalyst, Drinking water
-
62浏览
-
0点赞
-
0收藏
-
0分享
-
496下载
-
0评论
-
引用
【期刊论文】Dealumination process of zeolite omega monitored by 27Al 3QMAS NMR spectroscopy
关乃佳, Jixin Chen, Tiehong Chen∗, Naijia Guan, Jingzhong Wang
Catalysis Today 93-95(2004)627-630,-0001,():
-1年11月30日
From the 27Al MAS NMR and 2D 3QMAS NMR experiments, it can be concluded that during the steaming process of zeolite omega, some part of the framework tetrahedral Al species are gradually distorted. The 30 ppm broad hump in the 1D 27Al spectra is mainly due to appearance of the distorted tetrahedral Al. With the dealumination process going on, penta-coordinated Al species are formed and contribute also to the 30 ppm broad hump. There exists the trend that the formation of penta-coordinated Al occurs with the consumption of the distorted tetrahedral Al species. Because the same phenomenon of the 27Al NMR signals has also been observed in other zeolites, such as mordenite, ZSM-5 and Y, it could be regarded as a general procedure in the process of dealumination of acidic zeolites.
Dealumination, Zeolite omega, 3QMAS NMR spectroscopy
-
36浏览
-
0点赞
-
0收藏
-
0分享
-
222下载
-
0评论
-
引用
【期刊论文】Titania supported Pd-Cu bimetallic catalyst for the reduction of nitrate in drinking water
关乃佳, Wenliang Gao, Naijia Guan∗, Jixin Chen, Xinxin Guan, Ruicai Jin, Haisheng Zeng, Zhiguang Liu, Fuxiang Zhang
Applied Catalysis B: Environmental 46(2003)341-351,-0001,():
-1年11月30日
Titania supported palladium-copper bimetallic catalysts (Pd-Cu/TiO2) are prepared by the liquid phase chemical reduction method and then applied in the liquid phase catalytic reduction of nitrate ions (NO3−). Compared with the conventional impregnation method that needs the post-thermal reduction to prepare the supported metallic catalysts, the liquid phase chemical reduction at room temperature can inhibit the aggregation of metal active components and have been proved to exhibit high catalytic activity in this work. The conversions of NO3− are 29.18% and 54.12% over the catalysts treated at 873 and 298 K, respectively. The conversion of NO3− and selectivity to N2 influenced by the effect of the support, the loading of Pd + Cu, the molar ratio of Pd to Cu, the H2 flow rate, the addition of CO2 and the pH value of solution are also discussed in detail with the surface characterizations by X-ray photoelectron spectrum (XPS), X-ray diffraction (XRD), in situ FT-IR and transmission electron microscopy (TEM). A mechanism has been proposed that Cu2O component involved the reaction course and acted as the active center for nitrate-to-nitrite conversion. The spilt-over hydrogen on Pd is suggested to reduce the adjacent Cu2O into metal Cu, and on the latter the conversion of NO3− to NO2− occurs. However, in strongly acidic solution, copper is dissolved from the Pd-Cu/TiO2 catalyst and released into the solution in the form of copper (Ⅱ) ions, so the reduction of Cu2O to Cu is inhibited and the nitrate reduction cannot be accomplished.
Reduction of nitrate, Titania supported palladium-copper bimetallic catalyst, Liquid phase chemical reduction, Characterization, Mechanism
-
45浏览
-
0点赞
-
0收藏
-
0分享
-
570下载
-
0评论
-
引用
【期刊论文】Catalytic reduction of nitrite ions in drinking water over Pd-Cu/TiO2 bimetallic catalyst
关乃佳, Wenliang Gao a, b, Jixin Chen a, Xinxin Guan a, Ruicai Jin a, Fuxiang Zhang a, Naijia Guan a, ∗
Catalysis Today 93-95(2004)333-339,-0001,():
-1年11月30日
Titania supported palladium-copper bimetallic catalysts (Pd-Cu/TiO2) are prepared by liquid-phase chemical reduction method and then applied in the catalytic reduction of nitrite ions in drinking water. The nitrite conversion and selectivity to N2 influenced by metal molar ratio (Pd:Cu), H2 flow rate, CO2 flow rate, pH value of solution and reaction temperature are also discussed in detail with physical characterizations methods such as XPS, XRD, in situ FT-IR. It is discovered that bimetallic Pd-Cu/TiO2 catalyst has higher activity than monometallic Pd/TiO2 catalyst in the catalytic reduction of nitrite ions and a mechanism is proposed to explain this promoting effect of bimetallic catalyst in this paper.
Nitrite ions, Catalytic reduction, Pd-Cu/, TiO2 bimetallic catalyst, Characterization, Mechanism
-
39浏览
-
0点赞
-
0收藏
-
0分享
-
243下载
-
0评论
-
引用
【期刊论文】Titania-supported bimetallic catalysts for photocatalytic reduction of nitrate
关乃佳, Wenliang Gao, Ruicai Jin, Jixin Chen, Xinxin Guan, Haisheng Zeng, Fuxiang Zhang, Naijia Guan∗
Catalysis Today 90(2004)331-336,-0001,():
-1年11月30日
Photocatalytic reduction of nitrate in the presence of hole scavenger has been studied by using TiO2-supported bimetallic catalysts for the first time. Compared with monometallic catalysts, bimetallic catalysts, especially Ni-Cu/TiO2 catalyst, show more excellent photocatalytic reduction activity. Furthermore, the effects of metal weight ratio, total metal content, different hole scavengers and pH value of the solution are also investigated. It is found that pH value of reaction solution plays an important role in the photocatalytic reduction of nitrate ions. A mechanism is proposed to discuss enhancement effect of the bimetallic catalyst in photocatalytic reduction of nitrate ions in this paper.
Ni-Cu/, TiO2 bimetallic catalyst, Drinking water, Photocatalytic reduction, Mechanism.,
-
27浏览
-
0点赞
-
0收藏
-
0分享
-
404下载
-
0评论
-
引用
关乃佳, Landong Li a, Jixin Chen a, Shujuan Zhang a, Naijia Guan a, ∗, Manfred Richter b, Reinhard Eckelt b, Rolf Fricke b
Journal of Catalysis 228(2004)12-22,-0001,():
-1年11月30日
ZSM-5 and AlTS-1 zeolites were successfully in situ synthesized on the surface of honeycomb cordierite substrate, certified by XRD and SEM techniques. Strong interaction between zeolite and substrate developed during in situ synthesis, entailing improved hydrothermal stabilities of the zeolites. A series of nonnoble metal ion-exchanged ZSM-5/cordierite and AlTS-1/cordierite were studied as catalysts for the selective reduction of nitric oxide by propane under dry and wet conditions. In the deNOx processes, Nox (ads) and CxHyOz (ads) were thought as the important reaction intermediates and the formation of them on the catalysts was a key step in deNOx reactions. Based on this, the factors that influence the activities of the catalysts were discussed considering not only the active components but also the supports. As for the active components, the ability to adsorb gas reactants and the oxidative activity are two dominant factors that determined the deNOx activities. As for the supports, the Br
Nox, SCR, MFI/, cordierite, In situ synthesis, Adsorption, Oxidative activity, Br
-
43浏览
-
0点赞
-
0收藏
-
0分享
-
177下载
-
0评论
-
引用
【期刊论文】Simple and low-cost preparation method for highly dispersed Pd/TiO2 catalysts
关乃佳, ixin Chen, Xiu Zhang, Wenliang Gao, Ruicai Jin, Naijia Guan∗
Catalysis Today 93-95(2004)645-650,-0001,():
-1年11月30日
Supported metal catalysts have been applied in many current industrial processes. The morphology of metal particles coated on support has been proven to affect the performance of catalysts greatly. In this study, a simple photodeposition process will be introduced to coat palladium onto titanium dioxide with an emphasis on the morphology control and size distribution of palladium particles. The effect of pH on the morphology of palladium particles was systemically investigated. It is found that the deposited palladium particles can be controlled to have narrow particle size distribution and homogeneous dispersion by a simple pH-controlled process during photodeposition. Experimental results demonstrate that the adsorption competition between OH- and PdCl42- or it's hydrolytic anions can efficiently keep local concentration of palladium ions on titanium dioxide extremely low to control the morphology of deposited palladium particles on titania. The as-prepared Pd/TiO2 particles are found to be crystallitic stable indicated by TEM, XRD and XPS measurements.
Palladium particles, Titania, Coating, Photodeposition, Morphology
-
38浏览
-
0点赞
-
0收藏
-
0分享
-
135下载
-
0评论
-
引用
【期刊论文】Preparation and characterization of boron-doping ruthenium catalysts for ammonia synthesis
关乃佳, Shan Wu, Xingfang Zheng, Jixin Chen, Haisheng Zeng, Naijia Guan*
Catalysis Communications 5(2004)639-642,-0001,():
-1年11月30日
Boron-doping commercial magnesia-supported ruthenium catalysts for ammonia synthesis were conveniently prepared in a similar process of the preparation of supported amorphous alloy Ru-B catalysts using RuCl3
-
55浏览
-
0点赞
-
0收藏
-
0分享
-
170下载
-
0评论
-
引用