CoS2-碳(C60,石墨,碳纳米管)/TiO2复合光敏剂光降解有机染料（英文）

CoS2,CoS 2-C60 /TiO2,CoS2-CNT/TiO2,and CoS2-Graphene/TiO2 were prepared.The TiO2 products had the anatase phase structure and interesting surface compositions.X-ray diffraction patterns of the CoS2-carbon/TiO2 composites showed a single and clear anatase phase and the CoS2 structure.Scanning electron microscopy characterization of the texture on the CoS 2-carbon/TiO2 composites showed a homogenous composition.Energy-dispersive X-ray spectra for elemental identification showed the presence of C and Ti with strong Co and S peaks from the CoS2-carbon/TiO2 composites.The composites obtained were also characterized by transmission electron microscopy and UV-Vis spectroscopy.CoS2-carbon/TiO2 composites showed excellent photocatalytic activity for the degradation of methylene blue under visible light irradiation.This was attributed to both photocatalysis on the TiO2 support and charge transfer by the carbon nanomaterial,and the introduction of CoS2 to enhance transfer of photogenerated electrons.     

MoO_3-TiO_2纳米晶体复合材料光降解糖蜜(英文)

A MoO3-TiO2 nanocrystalline composite material was prepared by a simple solgel method.The synthesized material was charac-terized by X-ray diffraction,scanning electron microscopy with an electron dispersion spectroscopy,transmission electron microscopy,and Fourier transform infrared spectroscopy.Melanoidin is a dark brown pigment found in wastewater from the sugar industry and it pollutes water.This polluted water is generally referred to as molasses and it undergoes fermentation and is solely responsible for water,soil,and air pollution.The synthesized catalytic material was found to be effective in degrading molasses under UV-visible radiation.Analysis of treated and untreated molasses was carried out by measuring its color,chemical oxygen demand,biological oxygen demand,pH,and total dissolved solid.Results from these analyses indicate the effective photodegradation of the molasses.This methodology has several advantages such as high photocatalytic activity,non-toxicity,cleanliness,and reusability of the catalytic material.     

铂沉积对Ga2O3-SiO2纳米粒子光催化性能的提高（英文）

Ga2O3‐SiO2 nanoparticles were prepared by a sol‐gel method and Pt was then immobilized on their surface via photo‐assisted deposition (PAD). The produced samples were characterized using X‐ray diffraction (XRD), ultraviolet and visible spectroscopy, photoluminescence emission spectroscopy, and surface area measurements. The catalytic performances of the Ga2O3‐SiO2 and Pt/ Ga2O3‐SiO2 samples were evaluated for the degradation of cyanide using visible light. XRD and EDX results showed that the Pt was well dispersed within the Ga2O3‐SiO2 phase and was detected on the surface of the catalyst, which confirmed the successful loading of Pt ions by the PAD method. BET results revealed that the surface area of Ga2O3‐SiO2 was higher than that of Pt/Ga2O3‐SiO2 . 0.3 wt% Pt/Ga2O3‐SiO2 exhibited the highest photocatalytic activity for degradation of cyanide under visible light. The catalyst could be reused with no loss in activity for the first 10 cycles.     

ZnTiO3-TiO2纳米复合材料的光催化性能

通过溶胶 凝胶（Sol-Gel）法制备了ZnTiO3-TiO2纳米复合光催化剂,利用透射电子显微镜、X射线衍射、紫外-可见吸收光谱和ζ电位等测试技术对其形貌、晶体结构及其光谱响应特性进行了表征。 以亚甲基蓝（MB）溶液的脱色降解为模型反应,考察了光源和焙烧温度对该纳米复合材料光催化性能的影响。 结果表明,所得纳米复合材料的催化性能与材料的尺寸、在介质中的分散性能、表面荷电性质等有关。 600 ℃下焙烧3 h所得的ZnTiO3-TiO2纳米复合材料尺寸小（约60 nm）、分散性能好、表面荷负电荷量最高、催化性能最好,且在太阳光下的活性高于紫外光下的。 如太阳光下7 h可使亚甲基蓝（MB）溶液的脱色降解率达到93%,而在紫外光下只有82%;并且其催化活性高于纯TiO2和ZnO的。 该纳米复合催化剂重复使用4次仍能使亚甲基蓝（MB）溶液的脱色降解率在80%以上。 因此,具有较好的光催化稳定性能。     

Rh/ZnO-Al2O3催化剂用于巴豆醛选择性加氢（英文）

Gas phase hydrogenation of crotonaldehyde was performed over 1 wt% Rh/ZnO-Al2O3 catalysts with various Zn/Rh atomic ratios. Monometallic Rh/Al2O3 was also prepared for comparison. The samples were prepared by the successive impregnation of Al2O3 with chlo-ride precursors of zinc and rhodium. The solids have been characterized by H2 chemisorption,temperature-programmed reduction,scanning electron microscopy,and cyclohexane dehydrogenation. Their catalytic behaviour in the gas phase crotonaldehyde hydrogenation reaction after reduction treatment in flowing hydrogen at 723 K was investigated. The relationship between catalytic activity,selectivity for crotyl alcohol,and physicochemical properties of the catalysts was examined. Results obtained showed that the presence of Zn clearly promotes the hydrogenation of the carbonyl bond. The catalyst with Zn/Rh atomic ratio of 5 displayed good catalytic stability and the highest selectivity for crotyl alcohol(70%) along with alloy formation.     

Cu网负载CeO2-TiO2微纳米复合材料（CeO2-TiO2）/Cu的水热制备与性能

以Cu网为载体,Ti(OBu)4和Ce(NO3)3·6H2O为原料,Na3PO4·12H2O为矿化剂,采用一步水热法制备了多种不同形貌的Cu网负载CeO2-TiO2微纳米复合材料(CeO2-TiO2)/Cu.采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和紫外-可见漫反射分光光度计(UV-Vis DRS)对材料的形貌、结构及光吸收特性进行了表征,通过测试接触角表征了材料的浸润性.以20μmol/L亚甲基蓝(MB)溶液为目标降解物,测试了材料在可见光照射下的催化性能.结果表明,制备的TiO2为锐钛矿型,CeO2为方铈矿型;CeO2晶体比TiO2晶体更易负载于Cu网;改变制备过程中Ce(NO3)3·6H2O的用量、Na3PO4·12H2O浓度、水热反应时间及温度可实现(CeO2-TiO2)/Cu的形貌调控;(CeO2-TiO2)/Cu显示出超亲水性及可见光催化活性.     

Ni/TiO2-SiO2上光催化重整葡萄糖以低CO选择性制H2（英文）

Nano-sized Ni particles on TiO2-SiO2 were synthesized by the two methods of photo-assisted deposition(PAD) and impregnation.H2,which is a promising energy carrier,with a low CO concentration was produced by the photocatalytic reforming of glucose(a model biomass) on the Ni/TiO2-SiO2 catalyst.The supported Ni enhanced the rate of H2 production while it suppressed CO selectivity.The catalysts were characterized by X-ray diffraction,X-ray absorption fine structure,transmission electron microscope,and nitrogen adsorption analysis.Both H2 production and CO selectivity were strongly dependent on the preparation method,and PAD-Ni/TiO2-SiO2 was the better catalyst for H2 production with the lowest CO concentration.     

稻壳SiO2/钒催化剂上苯乙酮液相氧化（英文）

Rice husk silica catalyst loaded with 10 wt% vanadium was synthesized from agricultural biomass via a sol-gel synthetic route at pH = 9. The catalyst was characterized by different physico-chemical methods. The FTIR spectra showed the formation of Si–O–V and V=O stretching bands. The presence of vanadium was confirmed by EDX elemental analysis. RH-10V possessed a high specific surface area of 276 m2/g and pore volume of 0.83 ml/g. The prepared catalyst possessed a narrow pore size distribution centered around 7.9 nm. The catalytic performance of RH-10V was tested in the oxidation of acetophenone at 70 ℃. RH-10V was found to be an active catalyst in the oxidation of acetophenone, producing 36.28% conversion efficiency. The products identified were benzoic acid, 2-hydroxyacetophenone, phenol, acetic acid, and 3-hydroxyacetophenone.     

可见光下具有高光子效应和光催化活性的CuS-石墨烯氧化物/TiO2复合材料的制备（英文）

CuS-graphene oxide/TiO2 composites were prepared using a sol-gel method to improve the photocatalytic performance of the photocatalyst. The composites were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis, and transmission electron microscopy. The photocatalytic activities were examined by the degradation of methylene blue (MB) under visible-light irradiation. The photodegradation of MB under visible-light irradiation reached 90.1% after 120 min. The kinetics of MB degradation was plotted alongside the values calculated from the Langmuir-Hinshelwood equation. The CuS-graphene oxide/TiO2 sample prepared using 0.2 mol of TiO2 showed the best photocatalytic activity. This was attributed to a cooperative reaction as a result of increased photoabsorption by graphene oxide and an increased photocatalytic effect by CuS.     

高活性多壁碳纳米管/TiO2纳米复合物光催化剂光催化降解活性黑5染料（英文）

A nanocomposite UV-visible light-responsive multiwalled carbon nanotube (MWCNT)/titanium dioxide(TiO2) nanophotocatalyst was successfully synthesized by a modified sol-gel method using titanium isopropoxide and functionalized MWCNTs as the starting precursors. The photocatalytic activity of the TiO2 and the nanohybrid material was investigated through the photodegradation of Reactive Black 5 dye under ultraviolet light irradiation. X-ray diffraction analysis indicated that anatase phase was obtained for both the pure TiO2 and the MWCNT/TiO2 composite, while Raman spectroscopy confirmed the presence of MWCNTs in the composite. Field emission scanning elec-tron microscopy revealed that TiO2 nanoparticles with an individual diameter of about 10–20 nm were coated on the surface of the MWCNTs. The specific surface areas of the samples were found to be 80 and 181 m2/g for the pure TiO2 and MWCNT/TiO2, respectively. As a result, MWCNT/TiO2 showed better photocatalytic performance than pure TiO2 because the high surface area of MWCNTs enabled them to function as good electron acceptors for the retardation of electron-hole pair recombination.     

MoO3 /SiO2复合正极材料的制备及电化学性能研究

本文通过化学沉淀-热处理方法制备了MoO3正极材料,并通过正硅酸乙酯(TEOS)的水解在MoO3的表面包覆SiO2得到MoO3/SiO2复合正极材料[wSiO2/wMoO3=8%],对制备材料的结构和电化学性能进行了表征。结果表明,得到的MoO3为纯的正交相结构,片状MoO3的粒径大小约200～500 nm,厚度约50 nm。片状颗粒倾向于堆积在一起形成层状结构。在MoO3的表面包覆了一层无定形的SiO2。在电压范围1.5～4.0 V的条件下,以0.1C倍率进行恒电流充放电测试,MoO3/SiO2样品的首次放电容量为332.7 mAh.g-1,库仑效率87.6%。循环20次后,放电容量降为277.7 mAh.g-1。SiO2的包覆降低了MoO3正极材料的初始容量,但循环性能得到了提高。     

g-C3N4/Ag/TiO2复合材料的构筑及其光催化性能（英文）

以合成的g-C3N4纳米片和Ag/TiO2空心微球为原料,采用机械搅拌的方法构筑了g-C3N4/Ag/TiO2三元复合光催化剂。采用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、扫描电镜(SEM)、X射线光电子能谱(XPS)、紫外-可见光漫反射(UV-Vis DRS)和光致发光光谱(PL)对g-C3N4/Ag/TiO2进行了表征。研究表明,g-C3N4/Ag/TiO2是由Ag/TiO2微球和g-C3N4纳米片复合而成的。与TiO2相比,其可见光响应范围延长,光生载流子的分离速率加快。在室温下,用降解罗丹明B的反应考察了g-C3N4/Ag/TiO2的可见光催化活性。研究表明,光照180 min时,g-C3N4(0.5%)/Ag/TiO2显示了最高的光催化活性(91.9%),分别是TiO2和Ag/TiO2的7.5和1.8倍。光催化活性的提高与合理的异质结构建和Ag的导电性能有关。     

MoO3改性的TiO2在可见光下催化降解亚甲基蓝

采用浸渍法制备了MoO₃/P25催化剂（MoO₃/P25（x）,x为MoO₃与P25质量比）,用X射线衍射、紫外-可见漫反射光谱、傅里叶变换红外光谱及拉曼光谱等手段对样品进行了表征,并用催化降解亚甲基蓝考察了催化剂在可见光区的催化活性。结果表明,MoO₃在P25表面最大单层负载量对应的MoO₃与P25质量比在0.1左右。单层分散的氧化钼物种与P25之间有较强的相互作用,降低了P25禁带宽度,提高了催化剂对可见光的吸收。当MoO₃与P25质量比大于0.1时,会生成晶相MoO₃,催化剂对可见光的吸收反而随MoO₃担载量增加而降低。催化剂禁带宽度不是决定其可见光下催化降解亚甲基蓝活性的唯一因素。具有适宜禁带宽度和一定晶相MoO₃含量的MoO₃/P25（0.25）表现出最佳活性。     

WO3-TiO2薄膜型复合光催化剂的制备和性能

采用溶胶-凝胶法在多孔钛片上制备了WO     

MoO3氧化物掺杂改善LiFePO4 / 乙炔黑电化学性能研究

采用MoO₃氧化物前驱物对磷酸铁锂(LiFePO₄)进行少量的掺杂，并用XRD、SEM、CV及恒流充放电测试对产物进行了研究。研究表明，少量的掺杂并未影响到LiFePO₄的晶体结构，但却能够在一定程度上改善LiFePO₄的电化学性能。其中650 ℃焙烧的1% Mo掺杂的LiFePO₄材料性能较好，该材料在以0.2 C的倍率充放电时，充放电曲线具有平稳的电压平台和较大的充放电容量，首次放电容量能达到     

Effect of sol-gel derived Al2O3-ZrO2 and Al2O3-TiO2 oxides on the selectivity of NO reduction by CO under oxidizing conditions

The role of Al₂O₃-ZrO₂ and Al₂O₃-TiO₂ sol-gel prepared supports in the activity of platinum for the NO reduction by CO under oxidizing conditions has been studied. ²⁷Al MAS-NMR spectra have shown the formation of pentacoordinate Al^V in alumina-zirconia support. ZrO₂ or TiO₂ crystalline phases cannot be identified by XRD diffraction, suggesting the formation of nanosized structures supported on alumina. When the reaction was carried out in presence of oxygen, large amounts of NO₂ were observed on Pt/Al₂O₃-ZrO₂catalyst, while the formation of N₂O is more prononced on Pt/Al₂O₃-TiO₂ catalyst. The effect of water during NO reduction is discussed. This revised version was published online in June 2006 with corrections to the Cover Date.     

CoFeOx/MoO2准平行纳米阵列电极的析氢性能

利用CoFe层状双金属氢氧化物(CoFe LDH)准平行纳米片阵列作为载体前驱体,通过原位负载及煅烧方式,实现了含有氧空位的 MoO₂纳米颗粒在纳米片阵列表面的生长。电化学研究结果表明,所得 CoFeO_x/MoO₂纳米阵列电极具有高析氢反应(HER)催化活性。该电极在10和1 000 mA·cm^-2时的HER过电位分别为40和217 mV。在50 mA·cm^-2的电流密度下,该电极可以稳定运行125 h。     

CoFeOx/MoO2准平行纳米阵列电极的析氢性能

利用CoFe层状双金属氢氧化物(CoFe LDH)准平行纳米片阵列作为载体前驱体,通过原位负载及煅烧方式,实现了含有氧空位的MoO₂纳米颗粒在纳米片阵列表面的生长。电化学研究结果表明,所得CoFeO_x/MoO₂纳米阵列电极具有高析氢反应(HER)催化活性。该电极在10和1 000 mA·cm^-2时的HER过电位分别为40和217 mV。在50 mA·cm^-2的电流密度下,该电极可以稳定运行125 h。     

纳米复合Sb2O3/TiO2的光催化性能研究

采用溶胶－凝胶法制备复合纳米Sb2O3/TiO2Sb2O3掺入浓度越大,催化剂中锐钛矿相含量越高,晶粒直径与颗粒直径越小,比表面积越大,在380－460nm,范围内,Sb2O3/TiO2的反射率则减弱,表明光吸收增强,Sb^5＋,占48．42％、Sb^ 占17．58％,以亚甲基蓝溶液光催化降解为模型反应,掺入2％,5％Sb2O3,亚在蓝溶液的光催化脱色降解一致动力学常数与总有机炭（TOC）去除率增大,发射光谱证明,Sb2O3的最佳比例为2％,当其比例大于2％时,其电子空穴对的复合率升高,光催化活性下降。