Hydrophilicity of TiO_2 Thin Films Codoped with Iron and Nitrogen

[中文文摘]采用溶胶-凝胶法制备了铁掺杂TiO2(Fe-TiO2)薄膜,将Fe-TiO2薄膜放置氨气气氛中高温处理,形成铁、氮共掺杂TiO2(Fe/N-TiO2)薄膜.通过XRD、XPS、SEM、UV-Vis法进行吸收光谱分析及薄膜表面亲水接触角分析,研究了铁、氮掺杂浓度,热处理温度,膜厚等因素对薄膜亲水性能的影响.结果表明,Fe/N-TiO2(0.5%Fe,摩尔百分数)显示出更佳的亲水性能,在可见光下优势尤为明显.铁掺杂主要作用是降低电子和空(的复合几率,氮掺杂可以增强TiO2薄膜在可见光区的吸收,两种效应相互结合,共同提高了薄膜在可见光下的亲水性能.[英文文摘]TiO2 doped with iron(Fe-TiO2)thin films were synthesized using sol-gel method.TiO2 codoped with iron and nitrogen(Fe/N-TiO2)thin films were prepared by calcining Fe-TiO2 thin films in ammonia atmosphere.The influence of iron and nitrogen doping concentration,heat-treatment temperature and film thickness on the hydrophilicity of the films were studied by XRD,XPS,SEM,UV-Vis spectra and measured water contact angle.The results indicated that Fe/N-TiO2(0.5%Fe,molar percent)films were optimum in hydrophilicity,especially under visible-light irradiation. Doping iron mostly reduced the recombination of electrons and holes, and doping nitrogen in TiO2 enhances photoresponse in visible-light region. The hydrophilicity benefited from both effects.国家自然科学基金(50472057

Preparation and Photocatalytic Activity of TiO_2 Powder Codoped with Iron and Nitrogen

Using TiCl4 as the titanium source, nanoparticles of TiO2 doped with nitrogen(N-TiO2) were synthesized by triethylamine. TiO2 powder codoped with iron and nitrogen(Fe/N-TiO2) were prepared by adsorption-deposition of Fe3+ on N-TiO2 and calcining at 400 ℃ for 2 h. From the XPS results for N1s binding energy at 399.6 eV and 396.6 eV, it is proposed that the partial N atoms as substitution atoms replace for O atoms in TiO2 lattice. The onset of the absorption spectrum of Fe/N-TiO2 has a 45 nm red-shift compared with that of TiO2. The results of photocatalytic degradation of methylene blue solution indicate that Fe/N-TiO2 (0.45% Fe3+) has a higher activity.Its photocatalytic activity is about 2 times as high as that of pure TiO2 under UV-light, and 3 times under sunlight. Doping of nitrogen in TiO2 enhances photoresponse in visible light region and doping of Fe3+ reduces the recombination of electrons and holes. Both of the above effects are beneficial for improving the performances of Fe/N-TiO2 photocatalyst.国家自然科学基金(No.50472057

Application of the three-dimensional visualization and 3D printing technology for the preoperative evaluation of retroperitoneal tumors

目的探讨三维重建及3D打印技术在腹膜后肿瘤术前评估中的应用价值。方法回顾性分析2011年3月至2015年9月厦门大学附属成功医院收治的50例腹膜; 后肿瘤病人的临床资料,应用人体器官三维建模软件将病人的CT二维图像重建成三维可视化图像,使用人体器官模型3D打印设备,用两色热塑性塑料打印实物模; 型,通过观察肿瘤与腹腔器官、腹部大血管之间的关系进行术前评估并制定手术方案。实施手术,术中比较重建结果与实际的区别。结果50例病人均成功完成三维; 重建,其中10例病人完成3D打印,三维重建结果及3D打印模型能够立体、清晰和实物化的显示肿瘤解剖学位置及与周围器官、血管的毗邻关系,与术中实际情; 况大致相符。50例病人均顺利施行手术,术中无死亡。结论三维重建及3D打印技术能够对腹膜后肿瘤术前进行精准评估,对指导手术具有一定的应用价值。Objective To explore the application value of three dimensional; visualization and 3D printing technology in the preoperative evaluation; of retroperitoneal tumors. Methods March 2011 to September 2015,the; clinical data of 50 cases of retroperitoneal tumor patients in Xiamen; University Affiliated successful hospital were retrospectively analyzed.; Xiamen strong science and technology R & D human organ 3D modeling; software will reconstruct 2D CT image visualization into a; three-dimensional visualization image,and then it can print physical; model with the company's XMQB-I human organ model 3D printing equipment; and white thermoplastic. At last,preoperative evaluation and surgical; plan can be made through the relationship between the tumor,organs in; abdominal cavity,and abdominal vascular. During the surgery,make a; comparison between the visualization results with the actual condition.; Results 50 cases of patients were successfully completed the; three-dimensional visualization,including 10 cases of patients; completed. Three-dimensional visualization and 3D printing model can; three-dimensionally,clearly show the adjacent relationship between the; anatomical tumour location and surrounding organs and blood; vessels,broadly in line with the actual surgery. 50 surgeries were; successfully performed,no death during perioperative period. Conclusion; Three dimensional visualization and 3D printing technology can make an; accurate preoperative evaluation of retroperitoneal tumors,which has a; certain application value for guiding surgery.国家自然科学基

Preparation and photocatalytic activity of TiO2 powder codoped with iron and nitrogen

Using TiCl4 as the titanium source, nanoparticles of TiO2 doped with nitrogen (N-TiO2) were synthesized by triethylamine. TiO2 powder codoped with iron and nitrogen (Fe/N-TiO2) were prepared by adsorption-deposition of Fe3+ on N-TiO2 and calcining at 400 degrees C for 2 h. From the XPS results for N1s binding energy at 399.6 eV and 396.6 eV, it is proposed that the partial N atoms as substitution atoms replace for O atoms in TiO2 lattice. The onset of the absorption spectrum of Fe/N-TiO2 has a 45 nm red-shift compared with that of TiO2. The results of photocatalytic degradation of methylene blue solution indicate that Fe/N-TiO2 (0.45% Fe3+) has a higher activity. Its photocatalytic activity is about 2 times as high as that of pure TiO2 under UV-light, and 3 times under sunlight. Doping of nitrogen in TiO2 enhances photoresponse in visible light region and doping of Fe3+ reduces the recombination of electrons and holes. Both of the above effects are beneficial for improving the performances of Fe/N-TiO2 photocatalyst

Hydrophilicity of TiO2 thin films codoped with iron and nitrogen

TiO2 doped with iron (Fe-TiO2) thin films were synthesized using sol-gel method. TiO2 codoped with iron and nitrogen (Fe/N-TiO2) thin films were prepared by calcining Fe-TiO2 thin films in ammonia atmosphere. The influence of iron and nitrogen doping concentration, heat-treatment temperature and film thickness on the hydrophilicity of the films were studied by XRD, XPS, SEM, UV-Vis spectra and measured water contact angle. The results indicated that Fe/N-TiO2 (0.5%Fe, molar percent) films were optimum in hydrophilicity, especially under visible-light irradiation. Doping iron mostly reduced the recombination of electrons and holes, and doping nitrogen in TiO2 enhances photoresponse in visible-light region. The hydrophilicity benefited from both effects

散发型戊型肝炎与急性乙肝临床特征比较

目的比较散发型急性戊型肝炎与乙肝临床特征。方法分析戊肝和急性乙肝间年龄、性别、肝脏损伤、症状体征以及病程的差异。结果急性肝炎病例中,戊型肝炎最常见(28.0%),急性乙肝次之(9.2%);戊肝平均发病年龄为56.3±13.1岁,急性乙肝为43.0±12.5岁,平均发病年龄戊肝较急性乙肝大(t=4.4723,P<0.0001),均为男性多发;两者常见的临床症状和体征基本相当,但戊肝患者黄疸症状更多见(P<0.05);戊肝病程较急性乙肝长(t=3.7249,P=0.0003);通过年龄性别进行1:1匹配分析,戊肝比急性乙肝对肝脏的损伤程度严重(t=3.5978,P=0.0019)。结论戊肝多见于中老年,急性乙肝多见于中青年,均为男性多于女性。临床特征比较戊肝较急性乙肝更为严重

Analysis on the epidemiological characteristics of the sporadic cases with hepatitis E infection in the rural area in Jiangsu province

目的了解江苏省农村散发性戊型肝炎的流行病学特征。方法通过建立覆盖市、镇、村三级医疗卫生服务机构的疑似肝炎主动监测网络,系统全面地监测戊型肝炎病例的发病情况。结果主动监测网络的敏感性明显高于网络报告系统,能更加准确、全面地掌握戊肝的发病规律。结果显示戊型肝炎病例占疑似急性肝炎病例的26.7%,男性戊肝发病率高于女性(P<0.01);发病随着年龄增长而上升,多见35岁以上人群;全年均有发病,冬春季节较高;戊型肝炎病毒株HEV1、4型并存,但以HEV4型为主(92.5%)。结论疑似肝炎主动监测系统数据显示目前戊肝发病率有被低估的风险。To understand the epidemiological characteristics of the sporadic cases with hepatitis E infection in the rural area of Jiangsu province,the prevalence of hepatitis E infection was surveyed systemically and completely through the initiatively monitoring system for the suspected cases of hepatitis E covering the city,town and village levels of medical and health service organizations.It was found that the initiatively monitoring system for suspected hepatitis E cases reflected the incidence of hepatitis E more accurately and comprehensively and was proved to be more sensitive than the network reporting system.The cases with hepatitis E accounted to 26.7% of the suspected cases with acute hepatitis and they were more frequent in male than in female.The incidence of hepatitis E increased with advance of age and most of cases occurred with age over 35.Estimated incidence was stable on the whole year,but rose up in winter and spring.The HEV type 1 and type 4 co-existed,but the HEV type 4 was proved to be the main type(92.5%).From the above observations,it seems that the initiatively monitoring system for the suspected cases of hepatitis E may be under-estimated for the risk of the hepatitis E infection in rural area of Jiangsu province.国家高技术研究发展计划(863计划)(2006AA02A209)资

亚洲百合与东方百合远缘杂交亲和性

为得到花色丰富、带有芳香气味、抗性强的OA或AO(O为东方百合杂种系,A为亚洲百合杂种系)型优势杂种,采用常规杂交和切割柱头的方法进行杂交,结果 AO型的22个组合,仅有亚洲百合‘Pollyanna’×东方百合‘Sambuca’这一组合得到了4个膨大的蒴果和40粒有胚种子,结实率为0.27%;85个LA(LA为Longiflorum hybrids×Asiatic hybrids的杂交后代)×O型组合均未得到完全膨大的果实和有胚种子;而21个OA型组合,有7个组合得到了膨大的蒴果及有胚种子。采用切割柱头的方法也未提高结实率,说明其没能有效克服其远缘杂交的障碍。通过花粉管荧光显微观察发现,亚洲百合和东方百合花粉几乎均能在母本的柱头上萌发,并沿着花柱道伸长生长,最终达到子房进入胚珠,说明AO型或OA型远缘杂交的受精障碍主要为受精后障碍

TiO_(2-x) Thin Film Prepared by RF Magnetron Sputtering and Its Effects on UV-Vis Absorption

[中文文摘]用射频反应磁控溅射法,250℃时在石英玻璃片上沉积TiO2-x薄膜,用XRD、SEM、XPS、UV-Vis等对其进行表征.结果表明:未经热处理的薄膜呈锐钛矿型,薄膜表面粗糙,粒径约为30 nm的小晶粒聚集在一起,形成一个个“小层”,层层错叠;经600℃保温2 h热处理的薄膜呈金红石型,晶粒较大,孔隙变大.XPS分析发现:未经热处理的薄膜表面存在着20%的三价钛,有与之相对应的较多的氧空位;经600℃在空气中热处理后,三价钛减少到8%,同时氧空位减少.UV-Vis吸收表明,氧空位的存在有利于TiO2-x的吸收边向可见光波段移动.[英文文摘]TiO2-x films were prepared on quartz(SiO2) substrates at 250℃ by reactive radio-frequency(RF) magnetron sputtering,then heated at 600℃ in air for 2 h.The films with and without heat-treatment were characterized by XRD,SEM,XPS and UV-Vis.The films with and without heat-treatment presented rutile and anatase polycrystalline structure,respectively.Rough surfaces were obtained for all the films.For the film without heat-treatment,about 30 nm sub-grains grouped together into agglomeration to form layer-over-layer st ructure. Af ter heated at 600 ℃,the gain size became larger ,the pores got bigger. According to XPS analyses , there were 20% Ti3 + and more oxygen vacancies in the lattice of the film without heat2t reatment ,while 8% Ti3 + for the films heated at 600 ℃. The existence of oxygen vacancies helps the absorption edge extend to visible light according to the comparison in UV-Vis absorption.国家自然科学基金(50472057)资

Research on twisting of patterned ionic polymer metal composite

离子聚合物金属复合物(IOnIC POlyMEr METAl COMPOSITE,IPMC)是一种新型离子型电致动聚合物,具有在低电压驱动下产生大变形的特点而有广阔的应用前景。通过在IPMC表面制作图案化电极,使其在电压驱动下实现扭转运动。针对图案化电极的结构尺寸对其扭转特性的影响进行研究,得到图案化电极IPMC的扭转特性规律。同时针对贴合方式IPMC的结构尺寸变化对其扭转特性的影响进行研究,并比较两种IPMC的扭转运动效果,得出制备可实现扭转运动IPMC的影响因素。Ionic polymer metal composite(IPMC)was a kind of ionic electroactive polymer,which can generate large deformation when applied low driving voltage.It will be widely used in bionic,medical biological and other fields.In this paper,the patterned IPMC was fabricated to accomplish twist motion.To get the twisting characteristic of patterned IPMC,the variation of structural dimension of patterned IPMC was studied.Meanwhile,the structural dimension of patterned IPMC which was pasted two IPMC together was also researched in this paper.The result of two kind of patterned IPMC was compared,which indicate the influencing factors of fabricating of patterned IPMC to realize twist motion.福建省自然科学基金资助项目(2011J05140