井立强
个性化签名
- 姓名:井立强
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
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学科领域:
物理化学
- 研究兴趣:
井立强,男,1973年12月出生。1991年9月-1997年9月在吉林大学分析测试专业学习与工作,1997年9月-2000年7月在吉林大学攻读环境科学专业理学硕士学位,2000年9月-2003年3月在哈尔滨工业大学攻读环境工程专业工学博士学位,2003年5月至今在黑龙江大学化学化工与材料学院工作,2003年11月-2006年6月在吉林大学化学博士后流动站开展博士后研究工作。2004年9月和2006年9月相继被破格聘为副教授和教授。现为黑龙江大学一级特聘岗位教师,物理化学学科后备带头人,省高校“功能性设计合成与表界面化学”重点实验室副主任。2004年荣获黑龙江大学十佳青年教师称号。2007年荣获黑龙江省科学技术奖(自然科学类)一等奖(第1名),同年入选教育部新世纪优秀人才支持计划,并获省青年科技奖。
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1665
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成果阅读
528
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成果数
14
井立强, Liqiang Jing, Baifu Xin, Fulong Yuan, Lianpeng Xue, Baiqi Wang, and Honggang Fu*
J. Phys. Chem. B 2006, 110, 17860-17865,-0001,():
-1年11月30日
In this paper, TiO2 nanoparticles doped with different amounts of Zn were prepared by a sol-gel method and were mainly characterized by means of X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), and surface photovoltage spectrum (SPS). The effects of surface oxygen vacancies (SOVs) of Zn-doped TiO2 nanoparticles on photophysical and photocatalytic processes were investigated along with their inherent relationships. The results show that the SOVs easily bind photoinduced electrons to further give rise to PL signals. The SOVs can result in an interesting sub-band SPS response near the band edge in the TiO2 sample consisting of much anatase and little rutile, except for an obvious band-to-band SPS response. Moreover, the intensities of PL and SPS signals of TiO2, as well as the photocatalytic activity for degrading phenol solution, can be enhanced by doping an appropriate amount of Zn. These improvements are mainly attributed to the increase in the SOV amount. It can be suggested that the SOVs should play an important role during the processes of PL, surface photovoltage, and photocatalytic reactions, and, for the as-prepared TiO2 samples doped with different amounts of Zn by thermal treatment at 550℃, the larger the SOV amount, the stronger the PL and SPS signal, and the higher the photocatalytic activity.
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井立强, Jing Liqiang a, b, Fu Honggang a, *, Wang Baiqi a, Wang Dejun b, Xin Baifu a, Li Shudan a, Sun Jiazhong b
Applied Catalysis B: Environmental 62(2006)282-291,-0001,():
-1年11月30日
In this paper, Sn-doped TiO2 nanoparticles were prepared by a sol–gel method, and also were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), infrared spectrum (IR), ultraviolet–visible diffuse reflection spectrum (UV-vis DRS), photoluminescence spectrum (PL), surface photovoltage spectroscopy (SPS) and electrical field induced surface photovoltage spectroscopy (EFISPS). The sample activity was evaluated by photocatalytic oxidation reactions of phenol solution. The effects of thermal treatment temperature and Sn amount on photoinduced charge property, mainly involving charge separation and bound excitons resulting from surface states, and photocatalytic activity of TiO2 nanoparticles were principally investigated. The results show that an appropriate calcination temperature and Sn dopant amount can greatly enhance the SPS responses of TiO2 nanoparticles related not only to the band-band transitions but also to the bound excitons, and obviously weaken the PL signal, while the photocatalytic activity remarkably raises. These demonstrate that the separation rate of photoinduced charges of TiO2 nanoparticles can be effectively improved by doping Sn, which is responsible for the obvious increase in the photocatalytic activity. Moreover, the existence of bound excitons related to surface states also favor the photocatalytic activity. In addition, it can be found that the SPS responses related to the bound excitons could easily exhibit in the TiO2 sample consisting of much of anatase and little of rutile, which is possibly ascribed to the heterojunction between the anatase and rutile phase.
TiO2, Sn dopant, Photoinduced charge, Surface photovoltage, Photocatalysis
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井立强, Jing Liqiang a, b, , Xin Baifu a, Yuan Fulong a, Wang Baiqi b, Shi Keying a, Cai Weimin b, Fu Honggang a, *
Applied Catalysis A: General 275(2004)49-54,-0001,():
-1年11月30日
In this paper, we examined the lifetimes of made-in-home ZnO and TiO2 nanoparticles in the gas phase photocatalytic oxidation of n-C7H16 or SO2, and especially investigated the deactivation mechanism by utilizing surface photovoltage spectrum (SPS) and X-Ray photoelectron spectroscopy (XPS) testing techniques and by considering semiconductor chemical properties. The results showed that ZnO could almost be deactivated in the gas phase photocatalytic oxidation of n-C7H16, while TiO2 could keep most of its activity. In the gas phase photocatalytic oxidation of n-C7H16 or SO2, ZnO and TiO2 both could almost be deactivated. The deactivation mainly resulted from semiconductor surface conduction type change from N-type before the photocatalytic reaction to P-type after the deactivation because of the adsorption of the oxidation products such as H2O, CO2 and SO3 on the semiconductor photocatalyst surface. In addition, the activity of the deactivated photocatalyst could be regenerated to a nearly full extent by washing and drying.
ZnO, TiO2, Deactivation and regeneration, Photocatalytic oxidation, n-C7H16, SO2
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井立强, Jing Liqiang a, b, Wang Dejun b, Wang Baiqi a, Li Shudan a, Xin Baifu a, Fu Honggang a, ∗, Sun Jiazhong b
Journal of Molecular Catalysis A: Chemical 244(2006)193-200,-0001,():
-1年11月30日
In this paper, ZnO nanoparticles were modified by depositing different amount of noble metal Ag or Pd on their surfaces with a photoreduction method. The as-prepared ZnO samples were principally characterized by X-ray photoelectron spectroscopy (XPS) and surface photovoltage spectroscopy (SPS), and their activity was evaluated by a photocatalytic degradation reaction of phenol solution. The effects of noble metal modification on surface composition, photoinduced charge transfer behavior and photocatalytic activity of ZnO samples were mainly investigated. The results show that, after an appropriate amount of Ag or Pd is deposited on the ZnO surfaces, the O 1s XPS spectrum shifts to higher binding energy, indicating that the content of surface hydroxyl oxygen (OH) increases. And the SPS intensity greatly decreases, indicating that the photoinduced electrons are easily captured by adsorbed oxygen via noble metal clusters so that the recombination of photoinduced electron and hole pairs is effectively inhibited. These are responsible for the enhancement in the photocatalytic activity. Moreover, the effects of Pd modification on photocatalytic activity is greater than that of Ag, which can be explained by means of surface hydroxyl content as well as charge separation situation.
ZnO, Noble metal modification, Charge transfer, Photocatalysis, Phenol
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井立强, Jing Liqiang a, b, *, Sun Xiaojun b, Shang Jing c, Cai Weimin b, Xu Zili c, Du Yaoguo c, Fu Honggang a
Solar Energy Materials & Solar Cells █(█ █ █ █)█ █ █-█ █ █,-0001,():
-1年11月30日
Heterogeneous photocatalysis is a promising technique valuable for environmental purification. Nano-sized semiconductors such as ZnO and TiO2, which is one of the most basic functional materials, have emerged as effective photocatalyst materials. The surface photovoltage spectra (SPS) can be an effective method for quickly evaluating the photocatalytic activity of semiconductor materials since it can provide a rapid, non-destructive monitor of the semiconductor surface properties such as surface band bending, surface and bulk carrier recombination and surface states, mainly showing the carrier separation and transfer behavior with the aid of light, especially the electric-field-induced surface photovoltage spectra (EFISPS), in which SPS is combined with the electric-field-modified technique. In this review, the basic principles, measurement and applications of the SPS and EFISPS are mainly discussed together with some fundamental aspects like the electric properties of semiconductor surface and the principle of electric field effect. In particular, the applications of SPS to nano-sized semiconductors such as ZnO and TiO2 in heterogeneous photocatalysis are emphasized, which involve mainly evaluating the photocatalytic activity by analyzing semiconductor surface properties such as the separation efficiency of photoinduced carriers under illumination by the SPS measurement, highlighting our own contributions. The results show that the weaker the surface photovoltage signal is, the higher the photocatalytic activity is in the case of nano-sized semiconductor photocatalysts.
Surface photovoltage spectra, Semiconductor, anoparticle, Surface properties, Photocatalysis
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井立强, Jing Liqiang a, b, Qu Yichun a, Wang Baiqi a, Li Shudan a, Jiang Baojiang a, Yang Libin a, Fu Weia, Fu Honggang a, *, Sun Jiazhong b
Solar Energy Materials & Solar Cells 90(2006)1773-1787,-0001,():
-1年11月30日
In this review, the photoluminescence (PL) performance and mechanism of nano-sized semiconductor materials, such as TiO2 and ZnO, are introduced, together with their attributes and affecting factors. Moreover, the applications of PL spectra in environmental photocatalysis are discussed in detail, viz. the inherent relationships between the PL intensity and photocatalytic activity are revealed on the basis of PL attributes, demonstrating that the PL spectra can reflect some important information such as surface defects and oxygen vacancies, surface states, photo-induced charge carrier separation and recombination processes in nano-sized semiconductor materials. Thus, the PL spectrum can provide a firm foundation in theory for designing and synthesizing new semiconductor photocatalysts with high activity, as well as quickly evaluating the photocatalytic activity of semiconductor samples.
Semiconductor, Nanomaterials, Photoluminescence, Photocatalysis
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井立强, Jing Liqiang, a, b, * Sun Xiaojun, c Xin Baifu, a Wang Baiqi, b Cai Weimin, b and Fu Honggang a, *
Journal of Solid State Chemistry 177(2004)3375-3382,-0001,():
-1年11月30日
In this paper, pure and La doped TiO2 nanoparticles with different La content were prepared by a sol-gel process using Ti (OC4H9)4 as raw material, and also were characterized by XRD, TG-DTA, TEM, XPS, DRS and Photoluminescence (PL) spectra. We mainly investigated the effects of calcining temperature and La content on the properties and the photocatalytic activity for degrading phenol of as-prepared TiO2 samples, and also discussed the relationships between PL spectra and photocatalytic activity as well as the mechanisms of La doping on TiO2 phase transformation. The results showed that La3+ did not enter into the crystal lattices of TiO2 and was uniformly dispersed onto TiO2 as the form of La2O3 particles with small size, which possibly made La dopant have a great inhibition on TiO2 phase transformation; La dopant did not give rise to a new PL signal, but it could improve the intensity of PL spectra with a appropriate La content, which was possibly attributed to the increase in the content of surface oxygen vacancies and defects after doping La; La doped TiO2 nanoparticles calcined at 600℃ exhibited higher photocatalytic activity, indicating that 600℃ was an appropriate calcination temperature. The order of photocatalytic activity of La doped TiO2 samples with different La content was as following: 141.54340.54540 mol%, which was the same as the order of their PL intensity, namely, the stronger the PL intensity, the higher the photocatalytic activity, demonstrating that there were certain relationships between PL spectra and photocatalytic activity. This could be explained by the points that PL spectra mainly resulted from surface oxygen vacancies and defects during the process of PL, while surface oxygen vacancies and defects could be favorable in capturing the photoinduced electrons during the process of photocatalytic reactions.
TiO2, Nanoparticle, La doping, PL, Photocatalysis, Phenol
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【期刊论文】Investigations on the surface modification of ZnO nanoparticle photocatalyst by depositing Pd
井立强, Jing Liqiang a, b, Wang Baiqi b, Xin Baifua, Li Shudan a, Shi Keying a, Cai Weimin b, Fu Honggang a,
Journal of Solid State Chemistry 177(2004)4221-4227,-0001,():
-1年11月30日
In this paper, ZnO nanoparticle photocatalysts were modified by depositing Pd on their surfaces with a photoreduction method. We mainly investigated the modification mechanisms as well as the effects on the photocatalytic activity of ZnO nanoparticles of deposited Pd by means of XPS and SPS (Surface Photovoltage Spectroscopy), and the effects of Pd content on SPS responses were also discussed from the point of the electronic energy level. The results showed that the content of crystal lattice oxygen on the surface of ZnO nanoparticle decreased after an appropriate amount of Pd was deposited, while that of adsorbed oxygen increased, indicating that Pd was mainly deposited on the crystal lattice oxygen. At the same time, the intensity of SPS responses of ZnO nanoparticles remarkably decreased. In addition, the activity of ZnO nanoparticles could be greatly improved by depositing an appropriate amount of Pd in the gas phase photocatalytic oxidation of n-C7H16. Thus, it could be concluded that the increase in surface content of adsorbed oxygen could facilitate the photocatalytic reaction, and there were close relationships between the SPS response and photocatalytic activity, i.e. the weaker the SPS response, the higher the photocatalytic activity, of Pd-deposited ZnO nanoparticles.
ZnO, Nanoparticle, Surface modification, Pd, Photocatalysis
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【期刊论文】The preparation and characterization of ZnO ultrafine particles
井立强, Liqiang Jing a, *, Zili Xu b, Jing Shang b, Xiaojun Sun a, Weimin Cai a, Haichen Guo b
Materials Science and Engineering A332(2002)356-361,-0001,():
-1年11月30日
In this paper, ZnO ultrafine particles (UFPs) were prepared by the thermal decomposition method of the precursor, zinc carbonate hydroxide. The structure and properties of the as-prepared ZnO UFPs were studied using TEM, XRD, BET, SPS, ESR, Raman, XPS and UV-Vis absorption spectroscopy. It was found that the prepared ZnO UFPs exhibited obvious quantum size effect and surface effect. In addition, there were many active species on the surface of ZnO UFPs such as oxygen deficiencies and hydroxyls, both of which can improve the photocatalytic activities of ZnO UFPs.
ZnO, Ultrafine particles, Quantum size effects, Oxygen deficiencies, Surface effects
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【期刊论文】The surface properties and photocatalytic activities of ZnO ultrafine particles
井立强, Liqiang Jmg a, *, Zili Xub, Xiaojun Sun a, Jing Shang b, Weimin Cai a
Applied Surface Science 180(2001)308-314,-0001,():
-1年11月30日
We prepared ZnO ultrafine particles (UFPs) by thermal decomposition of the precursor zinc carbonate hydroxide. The surface properties of the as-prepared particles were studied using TEM, XRD, BET, SPS, EPR, IR, and XPS. The surface contains active species such as oxygen deficiencies and hydroxyl that improve photocatalytic activities. The concentrations of active species decreased as the calcination temperature increased along with the surface areas and photovoltage. The ZnO UFP have a significant EPR signal resulting from O2 deficiencies on the surface, which can capture and trap alectrons. Dining photocatalytic degradation of phenol, the photocatalytic activities of the particles decreased as their size increased, which means that these activities depend mainly on surface properties.
Ultrafine particle, Oxygen deficiencies, Surface hydroxyl, Photocatalytic activities, Phenol
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