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在Ti基体上,采用电沉积法制备了镨和聚乙烯吡咯烷酮(PVP)掺杂的Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 电极. SEM显示Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 电极表面颗粒细化,镀层结构更加致密和均匀,XRD 测试表明掺杂使可以使电极的表面颗粒变小.循环伏安 (CV)分析表明共掺杂改性后的电极电催化活性明显提高.强化寿命测试显示Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 电极稳定性更好,使用寿命更长. 将所制备的电极应用于亚甲基蓝(MB)模拟染料废水的降解测试,与常规的Ti/PbO2 电极相比,Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 电极对亚甲基蓝具有更好的脱色率和 COD 除去率. 降解120min 后,对30 mg·L -1 亚甲基蓝的去除率分别可达到99%,对COD去除率为87.9%. 相似文献
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Lead complex was directly synthesized by electrochemical dissolution of lead in a cell without separating the cathode and anode. The product was characterized by FTIR, Raman spectra and 1H NMR. The xerogel was prepared by a direct sol-gel of the electrolyte solution and then dryness of it. The xerogel was heated at 450 ℃ for 2 h to obtain the nano-PbO powder. FTIR, XRD, and TEM were used to investigate the structure of nano-PbO. The results show that the lead complex is Pb(OEt)2(acac)2, which contains acac- group and could prevent the precursor from hydrolysis and sintering during the calcinations process. The nano-PbO of 20~30 nm was thus obtained in a high purity by drying at 450 ℃. 相似文献
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利用溶胶-凝胶法和电化学聚合制得Ti/nanoTiO2-聚苯胺(PAn)复合膜电极,用X射线衍射仪、扫描电子显微镜及循环伏安法对电极的结构、表面形貌和电催化性能进行了表征。SEM测试表明,Ti/nanoTiO2-PAn电极上聚合的苯胺呈短纤维形貌,短纤维的直径较为均匀,为150 nm左右。以此电极进行电化学降解2,4,6-三硝基苯酚,在25℃,电解时间为180 min,电极间距离为2 cm,废水pH值在7~8之间,浓度为50 mg/L的2,4,6-三硝基苯酚模拟废水中COD,降解效率可达到41.2%。 相似文献
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The complexes Ti(OCH2CH2O)2 and Zr(OCH2CH2O)2 were directly synthesized by using HOCH2CH2OH dissolution in 50 mL flask. The nano-ZrO2 / TiO2 powders were prepared by a direct sol-gel synthesis using the above solution and followed by drying at 400 ℃ for 2 h. The complexes were characterized by FTIR and 1H NMR. XRD and TEM were used to investigate the structure of nano-ZrO2 / TiO2. The results show that the complexes containing -OCH2CH2O- group could prevent the precursor from agglomeration and sintering during the hydrolysis and calcination process. The ZrO2 / TiO2 powders of 20~35 nm was thus obtained in a high purity. The highly active nano-ZrO2 / TiO2 modified electrode was prepared by using daubing and calcination. The electro-catalytic activities of this electrode in (COOH)2 were investigated. The discharge current of nano-ZrO2 / TiO2 electrode increased obviously. In preparative electrolysis under optimal conditions, the average yield and current efficiency for HOOC-CHO were 84.7% and 91.6 %, respectively. 相似文献
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配合物Mg(OEt)(acac)的电化学合成 总被引:1,自引:1,他引:0
在溴化四丁基铵[(Bu4N)Br]的乙醇(EtOH)和乙酰丙酮(acacH)混合溶液中,电流强度0.2A,电解镁片6 h制得乙氧基镁配合物Mg(OEt)(acac).Bu4NBr浓度在40 mmol·L-1~50 mmol·L-1时,电流效率超过90%.在Mg(OEt)(acac)浓度210 mmol·L-1,pH 8.0,于40℃水解12 h的条件下,Mgo干凝胶收率超过87%.Mg(OEt)(acac)和Mg0干凝胶的结构经1H NMR,IR,XRD和拉曼光谱表征. 相似文献
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纳米LiAlO2 前驱体的电化学合成 总被引:1,自引:0,他引:1
在35 mmol·L-1 Bu4NBr的乙醇溶液中加入180 mg锂片,采用金属阳极溶解法控制电流为0.2 A电解铝片6 h,同时间断滴入0.9 mL乙酰丙酮,制得纳米LiAlO2的前驱体LiAl(Oet)4-n(acac)n[acac为乙酰丙酮基],其结构经IR, XRD, TEM, TG-DTA表征.实验结果表明电解温度为50 ℃,导电盐Bu4NBr浓度为35 mmol·L-1时电流效率在90%以上.在温度为40 ℃,前驱体浓度为300 mmol·L-1, pH=9.0的条件下,水解6 h得粒径20 nm~30 nm的前驱体干凝胶粉,产率可达94.8%;干凝胶粉在550 ℃煅烧可得纳米LiAlO2粉体. 相似文献