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| 1 | Preparation and luminescence properties of Y_2O_3:Er^(3+) /TiO_2 with high specific surface area显示文摘The three composites Y2O3 :Er3+ , Y2O3 :Er3+ /Yb 3+ andY2O3 :Er3+ /TiO2 were prepared using coprecipitation and sol-gel techniques. Their morphology, specific surface area, porosity, UV-vis. absorption spectra and fluorescence spectra were measured using SEM, TEM, surface analysis, UV-vis. absorption and photoluminescence spectrophotometry. SEM and TEM showed that samples prepared using coprecipitation were dispersed, while Y2O3 :Er3+ /TiO2 particles possessed a mesoporous surface and average diameter of about 10 nm. The specific surface area and porosity of Y2O3 :Er3+ /TiO2 did not result from the combination of the individual properties of Y2O3 :Er3+ and TiO2 . The specific surface area of Y2O3 :Er3+ /TiO2 was 135.991 m 2 /g and was 4.8 times that of Y2O3 :Er3+ and 2.5 times that of Degussa P25 TiO2 . A high specific surface area is conducive for application to TiO2 photocatalysis. The fluorescence spectra of the three composites exhibited three upconversion emission peaks with maxima at 237, 395 and 467 nm following excitation at 388, 500 and 570 nm, respectively. | YE YanXi LIU EnZhou HU XiaoYun YAN ZhiYun JIANG ZhenYi FAN Jun | 2011 | Chinese Science Bulletin2011，56，25： | 4 |
| 2 | The green-emitting fluorescence of nano Y_2O_3:Er^(3+) under different excitations显示文摘The green-emitting fluorescent powders of nano Y2O3:Er3+ were fabricated by the coprecipitation method. The X-ray diffraction pattern shows that as-prepared Y2O3:Er3+ is the cubic phase crystal with a grain size of about 30 nm. The UV-Vis spectrum indicates Y2O3:Er3+ exhibits five ultraviolet visible absorption peaks at 365, 377, 489, 521 and 652 nm respectively. Meanwhile, the fluorescence spectra of Y2O3:Er3+ display four emission peaks at 522, 537, 550 and 562 nm at the excitation of 365, 377 and 521 nm, respectively. The green-emitting fluorescent mechanism of Y2O3:Er3+ is proposed as well. Additionally, the temperature dependence of fluorescence properties and metal Ag fluorescence enhancement effect are investigated. Results show that increasing the annealing temperature and metal Ag doping both can enhance the fluorescence intensity. The maximum enhancement is 87.5% after Ag is doped. | JI RuoNan YE YanXi HU XiaoYun FAN Jun LIU EnZhou ZHANG Qian ZHAO ChaoShuai YE SiWen | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，7： | 3 |
| 3 | High-efficiency Photoelectrocatalytic Hydrogen generation Enabled by Ag deposited and Ce doped TiO 2 nanotube arrays显示文摘 | Xiao Fan Jun Wan Enzhou Liu Lin Sun Yang Hu Hua Li Xiaoyun Hu Jun Fan | 2014 | Ceramics International2014，，： | 2 |
| 4 | Extreme temperature increases the severity of intracerebral hemorrhage: An analysis based on the cold region of China显示文摘Objective:The purpose of this study was to find a suitable model to evaluate the relationship between temperature and intracerebral hemorrhage(ICH)and explore the effects of cold spells and heat waves on the clinicopathological parameters of ICH patients.Methods:We conducted a retrospective study based on the ICH admission in the First Affiliated Hospital of Harbin Medical University from 2015 to 2020(N=11124).The relationship between different seasons and the number of patients with ICH was explored.Poisson Akaike information criterion(AIC)was used to select the optimal model for temperature and ICH.Binary logistic regression analysis was used to investigate the association between extreme temperatures and clinicopathological features.Results:Hospital admissions for patients with ICH showed monthly changes.The optimal cold spell was defined as the daily average temperature<3rd percentile,lasting for five days,while the optimal heat wave was defined as the daily average temperature>97th percentile,lasting for three days.Based on the generalized extreme weather model,cold climate significantly increased the risk of hematoma volume expansion(OR 1.003;95%CI:1.000-1.005,P=0.047).In the optimal model,the occurrence of cold spells and heat waves increased the risk of midline shift in both conditions(OR 1.067;95%CI:1.021-1.115,P=0.004;OR 1.077;95%CI:1.030-1.127,P=0.001).Conclusion:Our study shows that seasonal cold spells and heat waves are essential factors affecting ICH severity,and targeted preventive measures should be taken to minimize the pathological impacts. | Xun Xu Chunyang Liu Rui Liu Qiuyi Jiang Enzhou Lu Chao Yuan Yanchao Liang Huan Xiang Boxian Zhao Xin Chen Ailing Lian Qi Zhou Guang Yang | 2022 | Frigid Zone Medicine2022，2，3： | 1 |
| 5 | Green and facile microwave-assisted synthesis of Ti O2/graphene nanocomposite and their photocatalytic activity for methylene blue degradation显示文摘 | YANG Yuhao LIU Enzhou FAN Jun | 2014 | Physical Chemistry A2014，88，3： | 1 |
| 6 | Study on synergistic effect of N and Ni2+ on nano titania in photocatalytic reduction of CO2显示文摘 | Jun Fan Enzhou Liu Lei Tian | 2011 | Journal of Environment Engineering2011，137，： | 1 |
| 7 | Facile hydrothermal synthesis of TiO3 nanospindles-reduced graphene oxide compos- ite with a enhanced photocatalytic activity显示文摘 | Wu Huitong Fan Jun Liu Enzhou | 2015 | Journal of Alloys and Compounds2015，623，： | 1 |
| 8 | Preface to Solar Photocatalysis显示文摘Solar energy is the most important clean and renewable energy in the world.However,the unpredictability,seasonal variation day and night,uneven distribution and low energy density limit its practical application.Photocatalysis technology has a very broad application prospect in solving energy and environmental problems. | Jiaguo Yu Xin Li Zhiliang Jin Hua Tang Enzhou Liu | 2022 | Chinese Journal of Structural Chemistry2022，41，6： | 0 |
| 9 | K2HPO4-mediated Photocatalytic H_(2)Production over NiCoP/RP Heterojunction显示文摘In this work,bimetallic NiCoP nanoparticles(NPs)were firstly prepared by a solvothermal method using red phosphorus(RP)as P source,and it was combined with RP nanosheets via a physical grinding process.Investigation indicates that NiCoP has better charge transfer ability and faster H_(2)releasing kinetics than the corresponding single metal phosphides alone.6 wt%NiCoP/RP exhibits an excellent H_(2)evolution activity in 20 vol.%triethanol-amine/water solution under a 300W Xe-lamp irradiation,and the corresponding H_(2)production rate is 1535.6μmol·g^(-1)·h^(-1),which is 7.4,3.2 and 2.6 times higher than those of pure RP,6 wt%Co_(2)P/RP and 6 wt%Ni_(2)P/RP,respectively.In addition,we demonstrate that K_(2)HPO_(4)can further enhance the H_(2)evolution kinetics by inducing a new H^(+)reduction path,when appropriate K_(2)HPO_(4)is introduced into the reaction solution.The H_(2)production rate of 6 wt%NiCoP/RP is boosted from 1535.6 to 2793.9μmol·g^(-1)·h^(-1) due to the easier combination between H^(+)and electrons with the assistance of HPO_(4)^(2-).It is 13.4 times higher than that of pure RP.This work demonstrates that bimetallic phosphides with suitable electrolytes can greatly enhance the photocatalytic H_(2)evolution efficiency. | Junfeng Huang Chenyang Li Xiaoyun Hu Jun Fan Binran Zhao Enzhou Liu | 2022 | Chinese Journal of Structural Chemistry2022，41，6： | 0 |
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