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| 1 | Comparison of dynamic adsorption/desorption characteristics of toluene on different porous materials显示文摘Four different types of adsorbents, SBA-15, MCM-41, NaY and SiO2, were used to study the dynamic adsorption/desorption of toluene. To further investigate the influence of pore structure on its adsorption performance, two SBA-15 samples with different microspores were also selected. It is shown that microporous material NaY has the largest adsorption capacity of 0.2873 mL/g, and the amorphous SiO2 exhibits the least capacity of 0.1003 mL/g. MCM-41 also shows a lower break through capacity in spite of the relatively small pore diameter, because it can not provide the necessary small geometric confinement for the tiny adsorbates. However, the mesoporous SBA-15 silica with certain micropore volume shows relatively higher adsorption capacity than that of MCM-41 silica. The presence of micropores directly leads to an increase in the dynamic adsorption capacity of toluene. Although NaY has the highest adsorption capacity for toluene, its complete desorption temperature for toluene is high (> 350°C), which limits its wide application. On the contrary, mesoporous silica materials exhibits a good desorption performance for volatile organic compounds at lower temperatures. Among these materials mesoporous SBA-15 samples, with a larger amount micropores and a lower desorption temperature, are a potentially interesting adsorbent for the removal of volatile organic compounds. This behavior should been related with the best synergetic effect of mesopores and micropores. | Weiwei Zhang Zhenping Qu Xinyong Li Yi Wang Ding Ma Jingjing Wu | 2012 | Journal of Environmental Sciences2012，24，3： | 13 |
| 2 | CO2 hydrogenation to methanol over Cu/CeO2 and Cu/ZrO2 catalysts:Tuning methanol selectivity via metal-support interaction显示文摘Copper-based catalysts for CO2 hydrogenation to methanol are supported on ZrO2 and CeO2,respectively.Reaction results at 3.0 MPa and temperatures between 200 and 300°C reveal that Cu catalysts supported on ZrO2 and CeO2 exhibit better activity and selectivity than pure Cu catalyst due to Cu-support(ZrO2 and CeO2)interaction.Combining the structural characterizations with in-situ diffuse reflectance infrared Fourier transform spectroscopy(in-situ DRIFTS),Cu/CeO2 shows the higher methanol selectivity due to the formation of main carbonates intermediates,which are closely related with the oxygen vacancies over Cu/CeO2.In contrast,bicarbonate and carboxyl species are observed on Cu/ZrO2,which originates from the hydroxyl groups presented on catalyst surfaces.Difference in CO2 adsorption intermediates results in the distinct methanol selectivity over the two catalysts. | Weiwei Wang Zhenping Qu Lixin Song Qiang Fu | 2020 | Journal of Energy Chemistry2020，29，1： | 11 |
| 3 | Highly catalytic activity of Mn/SBA-15 catalysts for toluene combustion improved by adjusting the morphology of supports显示文摘Rod-like, hexagonal and fiber-like SBA-15 mesoporous silicas were synthesized to support MnO_x for toluene oxidation. This study showed that the morphology of the supports greatly influenced the catalytic activity in toluene oxidation. MnO_x supported on rod-like SBA-15(R-SBA-15) displayed the best catalytic activity and the conversion at 230°C reached more than 90%, which was higher than the other two catalysts. MnO_x species consisted of coexisting MnO_2 and Mn_2O_3 on the three kinds of SBA-15 samples. Large amounts of Mn_2O_3 species were formed on the surface and high oxygen mobility was obtained on MnO_x supported on R-SBA-15, according to the H_2 temperature programmed reduction(H_2-TPR)and X-ray photoelectron spectroscopy(XPS) results. The Mn/R-SBA-15 catalyst with greater amounts of Mn_2O_3 species possessed a large amount of surface lattice oxygen, which accelerated the catalytic reaction rate. Therefore, the surface lattice oxygen and high oxygen mobility were critical factors on the catalytic activity of the Mn/R-SBA-15 catalyst. | Yuan Qin Zhenping Qu Cui Dong Yan Wang Na Huang | 2019 | Journal of Environmental Sciences2019，31，2： | 5 |
| 4 | Synergistic effects in Mn-Co mixed oxide supported on cordierite honeycomb for catalytic deep oxidation of VOCs显示文摘A series of Co-Mn mixed oxide catalyst supported on a cordierite monolith was facilely synthesized by ultrasonic impregnation.Its catalytic performance was evaluated in the combustion of toluene,ethyl acetate and its mixture.It was observed that with incorporating Mn into Co_(3)O_(4),the formation of solid solution with spinel structure could significantly improve the catalytic activity of pure phase Co_(3)O_(4).And the monolithic Co_(0.67)Mn_(0.33)O_(x) catalyst showed the best catalytic performance in the catalytic oxidation of toluene and ethyl acetate which could be completely oxidized at 220 and 180℃ respectively under the reaction velocity(WHSV)about 45,000 m L/(g·hr)and pollutant concentration of 500 ppm V.The total conversion temperature of the VOCs mixture was at 230℃(500 ppm V toluene and 500 ppm V ethyl acetate)and determined by the temperature at which the most difficult molecule was oxidized.The excellent catalytic performance of monolithic Co_(0.67)Mn_(0.33)O_(x) was attributed to the higher content of Mn^(3+),Co^(3+),surface adsorbed oxygen and better redox ability.The prepared catalyst showed the good mechanical stability,reaction stability,and good adaptability to different reaction conditions. | Hongyang Zhao Hui Wang Zhenping Qu | 2022 | Journal of Environmental Sciences2022，34，2： | 4 |
| 5 | Investigation of CO and formaldehyde oxidation over mesoporous Ag/Co_3O_4 catalysts显示文摘CO and formaldehyde(HCHO)oxidation reactions were investigated over mesoporous Ag/Co3O4 catalysts prepared by one-pot(OP)and impregnation(IM)methods.It was found that the one-pot method was superior to the impregnation method for synthesizing Ag/Co3O4 catalysts with high activity for both reactions.It was also found that the catalytic behavior of mesoporous Co3O4 and Ag/Co3O4 catalysts for the both reactions was different.And the addition of silver on mesoporous Co3O4 did not always enhance the catalytic activity of final catalyst for CO oxidation at room temperature(20 C),but could significantly improve the catalytic activity of final catalyst for HCHO oxidation at low temperature(90 C).The high surface area,uniform pore structure and the pretty good dispersion degree of the silver particle should be responsible for the excellent low-temperature CO oxidation activity.However,for HCHO oxidation,the addition of silver played an important role in the activity enhancement.And the silver particle size and the reducibility of Co3O4 should be indispensable for the high activity of HCHO oxidation at low temperature. | Fangli Yu Zhenping Qu Xiaodong Zhang Qiang Fu Yi Wang | 2013 | Journal of Energy Chemistry2013，22，6： | 3 |
| 6 | An investigation of Zr/Ce ratio influencing the catalytic performance of CuO/Ce1-xZrxO2 catalyst for CO2 hydrogenation to CH3OH显示文摘A series of CuO/Ce1-xZrxO2 catalysts(x=0.2,0.4,0.6 and 0.8)are applied to elaborate the effect of the Zr/Ce ratio on the catalytic performance of CO2 hydrogenation to CH3OH.The best catalytic performance is achieved with CuO/Ce0.4Zr0.6O2,exhibiting XCO2=13.2%and YCH3OH=9.47%(T=280℃,P=3 MPa).The formation of dispersed surface CuO species and larger number of oxygen vacancies are detected over CuO/Ce0.4Zr0.6O2 due to stronger interaction between CuO and Ce0.4Zr0.6O2,resulting in the superior activation ability for H2 and CO2 respectively.Additionally,the evidence is provided by in situ DRIFTS under the activity test pressure(3 MPa)that bi/m-HCOO* species are preferable for accumulating over ceria-rich(CuO/Ce0.6Zr0.4O2 and CuO/Ce0.8Zr0.2O2)catalysts while zirconia-rich(CuO/Ce0.4Zr0.6O2 and CuO/Ce0.2Zr0.8O2)catalysts are benefit to encourage the transformation of bi/m-HCOO* species to CH3OH.The abundant population and high activity of intermediate species over CuO/Ce0.4Zr0.6O2 give a strong positive effect on the catalytic performance. | Weiwei Wang Zhenping Qu Lixin Song Qiang Fu | 2020 | Journal of Energy Chemistry2020，29，8： | 2 |
| 7 | CO_(2)hydrogenation to methanol promoted by Cu and metastable tetragonal Ce_(x)Zr_(y)O_(z) interface显示文摘Designing effective catalyst to improve the activity of CO_(2) hydrogenation to methanol is a potential avenue to realize the utilization of CO_(2) resources. Herein we construct three kinds of Cu/Ce_(x)Zr_(y)O_(z)(CCZ) catalysts with different crystal phases of Ce_(x)Zr_(y)O_(z)solid solutions, which demonstrate distinct activity and methanol selectivity in the order of metastable tetragonal-CCZ(CCZ-t’’, parts of oxygen in Ce_(x)Zr_(y)O_(z) were replaced by tetragonal phase from cubic fluorite phase) > tetragonal-CCZ(CCZ-t) > cubic-CCZ(CCZ-c) for CO_(2) hydrogenation to methanol. Structural analysis reveals that oxygen vacancies, surface hydroxyls and unsaturated Cu species of CCZ all follow the same sequence as that of activity and methanol selectivity,indicating that the above features are beneficial to improve the catalytic reaction performance.Temperature programmed experiments and mechanism studies show that the interface between Cu and tetragonal(t and t’’) Ce_(x)Zr_(y)O_(z) can promote CO_(2) adsorption, and the adsorbed CO_(2) is more reactive and can generate active bidentate carbonate species, which can be hydrogenated to form active monodentate and bidentate formate species under CO_(2) and H_(2) atmosphere. These intermediates should be crucial to the formation of methanol product. CCZ-t’’has stronger H_(2) activation ability than CCZ-t, which makes the former catalyst have more intermediates and higher methanol selectivity. In contrast, CO_(2) mainly adsorbs on cubic Ce_(x)Zr_(y)O_(z) support of CCZ-c, but its H_(2) spillover ability is low, which hinders the reaction process. In addition, the strong adsorption of surface intermediates on CCZ-c is also not conducive to methanol formation. Results here demonstrate that constructing active Cu-support interfaces may be an important approach to design effective catalyst for CO_(2)hydrogenation. | Na Li Weiwei Wang Lixin Song Hui Wang Qiang Fu Zhenping Qu | 2022 | Journal of Energy Chemistry2022，31，5： | 2 |
| 8 | Wire-mesh honeycomb catalyst for selective catalytic reduction of NO x under lean-burn conditions显示文摘 | Hong Sun Yaobin Zhang Xie Quan Shuo Chen Zhenping Qu Yunlong Zhou | 2008 | Catalysis Today2008，，1： | 1 |
| 9 | Photocatalytic degradation of gaseous toluene over Ag-doping TiO 2 nanotube powder prepared by anodization coupled with impregnation method显示文摘 | Xinyong Li Xuejun Zou Zhenping Qu Qidong Zhao Lianzhou Wang | 2011 | Chemosphere2011，，5： | 1 |
| 10 | The role of titania pillar in copper-ion exchanged titania pillared clays for the selective catalytic reduction of NO by propylene显示文摘 | Li Xinyong Lu Guang Qu Zhenping | 2011 | Applied Catalysis A:Genetal2011，398，12： | 1 |
| 11 | Copper-ion ex- changed Ti-pillared clays for selective catalytic reduction of NO by Propylene 显示文摘 | Lu Guang Li Xinyong Qu Zhenping | 2011 | Chemical Engineering Journal2011，168，3： | 1 |
| 12 | Copper-ion ex-changed Ti-pillared clays for selective catalytic reduction of NO by propylene显示文摘 | Lu Guang Li Xinyong Qu Zhenping | 2011 | Chern Eng J2011，168，3： | 1 |
| 13 | Copper-ion exchanged Ti-pillared clays for selective catalytic reduction of NO by propylene显示文摘 | Lu Guang Li Xinyong Qu Zhenping | 2011 | Chemical Engineering Journal2011，168，3： | 1 |
| 14 | The role of titania pillar in copper-ion exchanged titania pillared clays for selective catalytic reduction of NO by propylene显示文摘 | Li Xinyong Lu Guang Qu Zhenping | 2011 | Applied Catalysis A:General2011，398，12： | 1 |
| 15 | The role of titania pillar in copper-ion exchange titania pillared clays for the selective catalytic reduction of NO by propylene 显示文摘 | LI Xinyong LU Guang QU Zhenping | 2011 | Applied Catalysis2011，39，9： | 1 |
| 16 | 显示文摘 | Lu Guang Li Xinyong Qu Zhenping | 2011 | Chemical Engi- neering Journal2011，168，3： | 1 |
| 17 | Highly ac-tive Ag/SBA-15 catalyst using post-grafting method forformaldehyde oxidation显示文摘 | Qu Zhenping Shen Shijin Chen Dan | 2012 | Journal of Molecular Cataly-sis A:Chemical2012，356，： | 1 |
| 18 | Enhancement of toluene oxidation performance over La_(1-x)CoO_(3-δ) perovskite by lanthanum non-stoichiometry显示文摘La_(1-x)CoO_(3-δ)catalysts with different non-stoichiometry of lanthanum ions were synthesized by using the sol-gel method,and their catalytic performance in toluene combustion was investigated.The results showed that the catalytic activity and stability of A-site nonstoichiometric La_(1-x)CoO_(3-δ)were improved to a certain extent compared with pure LaCoO_(3)perovskite.Among them,the La_(0.9)CoO_(3-δ)catalyst gave the best catalytic performance for toluene oxidation.It achieved 90%toluene conversion at 205℃under the conditions of a WHSV(weight hourly space velocity)of 22,500 mL/(g·hr)and a 500 ppmV-toluene concentration.Various characterization techniques were used to investigate the relationship between the structure of these catalysts and their catalytic performance.It was found that the non-stoichiometric modification of the lanthanum ion at position A in LaCoO_(3)changed the surface element state of the catalyst and increased the oxygen vacancy content,thus,combined with improved reducibility,improving toluene degradation on the catalyst. | Anlian Zhao Yewei Ren Hui Wang Zhenping Qu | 2023 | Journal of Environmental Sciences2023，，5： | 0 |
| 19 | Effect of alkaline earth metal promoter on catalytic activity of MnO_(2)for the complete oxidation of toluene显示文摘Herein,Na^(+)and Ca^(2+)are introduced to MnO_(2)through cation-exchange method.The presence of Na^(+)and Ca^(2+)significantly enhance the catalytic activity of MnO_(2)in toluene oxidation.Among them,the Ca-MnO_(2)catalyst exhibits the best catalytic activity(T_(50)=194℃,T_(90)=215℃,E_a=57.2 k J/mol,reaction rate 8.40×10^(-10)mol/(sec·m^(2))at 210℃.T_(50)and T_(90):the temperature of 50%and 90%toluene conversion;E a:apparent activation energy)and possess high tolerance against 2.0 vol.%water vapor.Results reveal that the increased acidic sites of the MnO_(2)sample can enhance the adsorption of gaseous toluene,and the mobility of oxygen species and the content of reactive oxygen species in the catalyst are significantly improved due to the formed oxygen vacancy.Thus these two factors result in excellent catalytic performance for toluene oxidation combining with the weak CO_(2)adsorption ability. | Cui Dong Hui Wang Yewei Ren Zhenping Qu | 2021 | Journal of Environmental Sciences2021，33，6： | 0 |
| 20 | Investigation of the promotion effect of Mo doped CuO catalysts for the low-temperature performance of NH_(3)-SCR reaction显示文摘A novel Mo-doped CuO catalyst is developed and used for low-temperature NH_(3)-SCR reaction.Compared with the undoped CuO sample,the Mo doped CuO catalyst shows an increased SCR performance with above 80%NO_(x) conversion at 175℃.The XRD and Raman results have confirmed the incorporation of Mo metal ions into CuO lattice to form Mo-O-Cu species which may be related to the enhanced SCR activity.The XPS and UV-vis results reveal the creation of electron interaction between Cu and Mo in this Mo-O-Cu system which provides an increased amount of Lewis and Brønsted acid sites,thereby promoting the adsorption capacity of NH_(3) and NO_(x) as verified by NH_(3)-TPD and NO_(x)-TPD characterization.Besides,it also promotes the formation of oxygen vacancies,leading to the increasing of chemisorbed oxygen species,which improves the NO oxidation to NO_(2) activity.Furthermore,in situ DRIFTS technology was also used to study the reaction mechanism of this Mo doped CuO catalyst.The formed NO_(2) could react with NHx(x=3,2)species to enhance the low-temperature NH_(3)-SCR activity via the'fast-SCR'reaction pathway.The nitrate and nitrite ad-species may react with NH_(3) and NH4^(+)ad-species through the L-H pathway. | Hui Wang Ting Zhu Yujie Qiao Shicheng Dong Zhenping Qu | 2022 | Chinese Chemical Letters2022，33，12： | 0 |
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