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Doping effects on the electro-degradation of phenol on doped titanium suboxide anodes
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作者 Xuan Yang Jiuji Guo +2 位作者 Zhaowu Zhu Hui Zhang Tao Qi 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第4期830-837,共8页
Titanium suboxide is an excellent electrode material for many oxidization reactions.In this article,the electrodes of pure Ti_4O_7,doped Ti_4O_7and the mixed-crystal of Ti_4O_7and Ti_5O_9were prepared to evaluate thei... Titanium suboxide is an excellent electrode material for many oxidization reactions.In this article,the electrodes of pure Ti_4O_7,doped Ti_4O_7and the mixed-crystal of Ti_4O_7and Ti_5O_9were prepared to evaluate their activities and doping effects in the electro-degradation of phenol.It was revealed by the HPLC analysis results that the degradation intermediates and routes were significantly affected by the doping element.On the pure Ti_4O_7anode,a series of classic intermediates were obtained from benzoquinone and hydroquinone to various carboxylic acids.These intermediates were degraded gradually to the final organic intermediate of oxalate in all experiments.At last,oxalate was oxidized to CO_2and H_2O.Distinctively,the Y-doped Ti_4O_7 anode directly broke phenol toα-ketoglutaric acid without the intermediates of benzoquinone and hydroquinone.The strong oxidization ability of the Y-doped Ti_4O_7 anode might be responsible for the highest COD removal ratio.In contrast,the Ga-doped Ti_4O_7 anode showed the worst degradation activity in this article.Three intermediates of benzoquinone,hydroquinone and maleic acid were found during the degradation.Benefiting from the weak ability,oxalate was efficiently accumulated with a very high yield of 74.6%.The results demonstrated promising applications from electrochemical preparation to wastewater degradation by adjusting the doping reagent of Ti_4O_7 electrodes. 展开更多
关键词 titanium suboxide Electro-oxidation doping effect Phenol Oxalate
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In vitro investigation of blood compatibility of titanium oxide film doped with Ta^(5+)
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作者 Xi Tingfei Huang Nan +4 位作者 Tian Wenhua Yang Ping Leng Yongxiang Chen Jungying Sun Hong(Center of Medical Devices, National lnstitUte for Col1trol of Pl1annaceutical and Biological Products, Beijing, 100050, China)(Depttient of Materials Engineering, Southw 《Chinese Journal of Biomedical Engineering(English Edition)》 1999年第3期16-17,共2页
关键词 TA In vitro investigation of blood compatibility of titanium oxide film doped with Ta
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Metastable-phaseβ-Fe_(2)O_(3) photoanodes for solar water splitting with durability exceeding 100 h 被引量:1
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作者 Yang Li Ningsi Zhang +6 位作者 Changhao Liu Yuanming Zhang Xiaoming Xu Wenjing Wang Jianyong Feng Zhaosheng Li Zhigang Zou 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第11期1992-1998,共7页
Planar films of pure and Ti^(4+)-dopedβ-Fe_(2)O_(3)were prepared by a spray pyrolysis method.X-ray diffraction patterns and Raman spectra of the metastableβ-Fe_(2)O_(3)film showed that its thermal stability was sign... Planar films of pure and Ti^(4+)-dopedβ-Fe_(2)O_(3)were prepared by a spray pyrolysis method.X-ray diffraction patterns and Raman spectra of the metastableβ-Fe_(2)O_(3)film showed that its thermal stability was significantly improved because of covalent bonds in the interfaces between the film and substrate,while only weak Van der Waals bonds existed at the interfaces within the particle-assembledβ-Fe_(2)O_(3)film prepared by electrophoretic deposition.The as-prepared planar films were thus able to withstand higher annealing temperature and stronger laser irradiation power in comparison with theβ-Fe_(2)O_(3)particle-assembly.Ti^(4+)doping was used to increase the concentration of carriers in the metastableβ-Fe_(2)O_(3)film.Compared with pureβ-Fe_(2)O_(3)photoanodes,the highest saturated photocurrent for water splitting over the Ti^(4+)-dopedβ-Fe_(2)O_(3)photoanode was increased by a factor of approximately three.Theβ-Fe_(2)O_(3)photoanode exhibited photochemical stability for water splitting for a duration exceeding 100 h,which indicates its important potential application in solar energy conversion. 展开更多
关键词 Metastable phase Spray pyrolysis β-Fe_(2)O_(3) photoanode titanium doping Stability Photoelectrochemical water splitting
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Recovery of lithium using H_(4)Mn_(3.5)Ti_(1.5)O_(12)/reduced graphene oxide/polyacrylamide composite hydrogel from brine by Ads-ESIX process 被引量:2
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作者 Jingsi Cui Huanxi Xu +3 位作者 Yanfeng Ding Jingjing Tian Xu Zhang Guanping Jin 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2022年第4期20-28,共9页
Powdery Li^(+)-imprinted manganese oxides adsorbent was widely used to the recovery of Li^(+),but there are some difficulties,such as poor stability in acid solution,inconvenience of operation and separation.In this w... Powdery Li^(+)-imprinted manganese oxides adsorbent was widely used to the recovery of Li^(+),but there are some difficulties,such as poor stability in acid solution,inconvenience of operation and separation.In this work,a useful hydrogel composite based H_(4)Mn_(3.5)Ti_(1.5)O_(12)/reduced graphene oxide/polyacrylamide(HMTO-rGO/PAM)was fabricated by thermal initiation method with promising stable,conductive and selective properties.The resulting materials were characterized by field emission scanning electron microscope,infrared absorption spectrum,X-ray diffraction,X-ray photoelectron spectroscopy and electrochemical techniques.The recovery of Li^(+)was investigated using HMTO-rGO/PAM from brine by a separated two-stage sorption statically and electrically switched ion exchange desorption process.The adsorption capacity of 51.5 mg·g^(-1)could be achieved with an initial Li^(+)concentration of 200 mg·L^(-1)in pH 10,at 45℃ for 12 h.Li^(+)ions could be quickly desorbed by cyclic voltammetry(CV)in pH 3,0.1 mol·L^(-1)HCl/NH;Cl accompanying the exchange of Li^(+)and H+(NH;)and the transfer of LMTO-rGO/PAM to HMTO-rGO/PAM. 展开更多
关键词 Lithium recovery titanium doped lithium ion sieve Hydrogel Adsorption-electrically switched ion exchange(Ads-ESIX)
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Improvement of Optical Reactivity for Nano-TiO2 Film by Nitrogen ECR Plasma
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作者 Yuying XIONG Tao MA +4 位作者 Ling hong KONG Junfang CHEN Xianqiu WU Honghua YU Zhenxi ZHANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2006年第3期353-358,共6页
Nitrogen ion was implanted into the nano-TiO2 film surfaces by electron cyclotron resonance (ECR) plasma modification to improve the optical reactivity in visible-light region for nano-TiO2. Diagnosing the N2 plasma... Nitrogen ion was implanted into the nano-TiO2 film surfaces by electron cyclotron resonance (ECR) plasma modification to improve the optical reactivity in visible-light region for nano-TiO2. Diagnosing the N2 plasma by optical emission spectroscopy (OES) was applied to the process of plasma modification. X-ray photoelectron spectroscopy (XPS) was used for analysis of the binding of element after plasma modification. It is shown that the surface modification was caused by excitated N. The injecting of N2 and N+ leads to the increase in the dissociative interstitial state N in the films. The doped N makes for TiO2-xNx appearing in the TiO2 films. TiO2-xNx forms the impurity energy state in the TiO2 energy band gap and reduces the energy band gap. This is the main reason leading to the red shift of absorption edge. 展开更多
关键词 ECR plasma surface treatment titanium dioxide nitrogen doping Optical emission spectroscopy X-ray photoelectron spectroscopy
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Fabrication and characterization of transparent conducting titanium-zinc oxide nanostructured thin films
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作者 陆轴 龙路 +4 位作者 钟志有 侯金 杨春勇 顾锦华 龙浩 《Optoelectronics Letters》 EI 2016年第2期128-131,共4页
Nano transparent conducting titanium-zinc oxide(Ti-Zn O) thin films were prepared on glass substrates by radio frequency(RF) magnetron sputtering technique. The deposited films are characterized by X-ray diffraction(X... Nano transparent conducting titanium-zinc oxide(Ti-Zn O) thin films were prepared on glass substrates by radio frequency(RF) magnetron sputtering technique. The deposited films are characterized by X-ray diffraction(XRD), four-probe meter and UV-visible spectrophotometer. The effects of Ti-doping content on the structural, optical and electrical properties of the films are investigated. The XRD results show that the obtained films are polycrystalline with a hexagonal wurtzite structure and preferentially oriented in the(002) crystallographic direction. The structural and optoelectronic characteristics of the deposited films are subjected to the Ti-doping content. The Ti-Zn O sample fabricated with the Ti-doping content of 3%(weight percentage) possesses the best crystallinity and optoelectronic performance, with the highest degree of preferred(002) orientation of 99.87%, the largest crystallite size of 83.2 nm, the minimum lattice strain of 6.263×10^(-4), the highest average visible transmittance of 88.8%, the lowest resistivity of 1.18×10^(-3) Ω·cm and the maximum figure of merit(FOM) of 7.08×10~3 Ω^(-1)·cm^(-1). Furthermore, the optical bandgaps of the films are evaluated by extrapolation method and observed to be an increasing tendency with the increase of the Ti-doping content. 展开更多
关键词 titanium conducting doping transparent crystallite sputtering magnetron crystallinity hexagonal preferred
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Construction of WO_(3)/Ti-doped WO_(3)bi-layer nanopore arrays with superior electrochromic and capacitive performances 被引量:2
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作者 Yingdi Shi Shujing Liu +7 位作者 Yong Zhang Mingjun Sun Kai Tang Jiewu Cui Xia Shu Yan Wang Jiaqin Liu Yucheng Wu 《Tungsten》 2019年第3期236-244,共9页
Crystalline WO_(3)/Ti-doped WO_(3)bi-layer nanopore arrays were constructed by the template synthesis of a WO_(3)nanopore layer modified by a magnetron sputtering of an amorphous Ti-doped/WO_(3)layer.The obtained bi-l... Crystalline WO_(3)/Ti-doped WO_(3)bi-layer nanopore arrays were constructed by the template synthesis of a WO_(3)nanopore layer modified by a magnetron sputtering of an amorphous Ti-doped/WO_(3)layer.The obtained bi-layer nanopore array shows a remarkable electrochromic performance with large dual-band optical modulation in both visible(VIS)and near infrared(NIR)regions(optical modulation of over 70%in the wavelength range from 600 to 1600 nm)and the fast response speed(coloring for 3.4 s and bleaching for 6.6 s).In addition,the bi-layer WO_(3)/Ti-doped WO_(3)nanopore array also present superior energy-storage properties(areal capacitance of 44.0 mF cm−2 and good rate capability),better than that of titanium-free thin films.The special bifunctional characteristics of electrochromism and pseudocapacitance can be ascribed to the large specific surface area provided by the architectural design,rich ion channels in the amorphous layer as well as proper titanium doping,which bestows the bi-layer nanopore array a great potential in clean energy applications. 展开更多
关键词 ELECTROCHROMISM Capacitance Tungsten oxide titanium doping
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Field emission characteristics of nano-diamond cathode surface by graphitization pretreatment
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作者 石延梅 杨延宁 +1 位作者 刘巧平 李伟霞 《Optoelectronics Letters》 EI 2016年第2期85-88,共4页
Cathode samples of nano-diamond by graphitization pretreatment with different temperatures were fabricated by electrophoresis, then the structures and morphologies of the cathode samples were characterized by scanning... Cathode samples of nano-diamond by graphitization pretreatment with different temperatures were fabricated by electrophoresis, then the structures and morphologies of the cathode samples were characterized by scanning electron microscope(SEM) and X-ray diffraction(XRD), and the field emission tests were conducted. The effects of graphitization pretreatment on the field emission characteristics of nano-diamond cathode surface on titanium substrate are studied. The results indicate that the surface morphologies of nano-diamond cathode samples after graphitization pretreatment change a lot, and the field emission characteristics in low-voltage area are improved obviously. However, in high-voltage area, the curve distortion happens, and it doesn't conform the mechanism of field emission characteristics. 展开更多
关键词 pretreatment diamond cathode conform titanium graphite conductive nanotubes distortion doping
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