期刊文献+
共找到223篇文章
< 1 2 12 >
每页显示 20 50 100
Solid-gas Phase Preparation Method for Porous Molybdenum Trioxide 被引量:1
1
作者 REN Jie MU Shichun +5 位作者 YANG Daohe LI Xuejing DONG Shengqi ZHU Junwei LIN Xianghai DONG Xuebin 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第3期495-500,共6页
A novel solid-gas reaction preparation technology was used to adjust the composition and microstructure of the composite crystal materials by changing the preparation parameters. Compared with the commonly used sol-ge... A novel solid-gas reaction preparation technology was used to adjust the composition and microstructure of the composite crystal materials by changing the preparation parameters. Compared with the commonly used sol-gel method, acid base neutralization sedimentation method, hydrothermal method, and gas phase deposition method, the technology was relatively simplified and the elemental composition was controllable, without the use of openings and additives. A kind of multi-element composite porous metal oxide was obtained by pre-intercalation and decarburization. In order to increase the porosity of MoO3 material and promote the adsorption and diffusion of reactant molecules, the microstructure of MoO3 was studied. The preparation process of porous molybdenum trioxide by solid gas combination process was discussed, which provides an innovative idea for the design and preparation of new materials with a large specific surface area and other desirable properties. 展开更多
关键词 molybdenum trioxide porous structure solid-gas phase method SYNTHETIC
下载PDF
Dispersion and Structure Studies of Molybdenum Oxide on Anatase TiO_2
2
作者 ZIFeng-lan GUOHong-you +2 位作者 WUNian-zu XIEYa-ning HUTian-dou 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2004年第6期685-689,共5页
X-ray photoelectron spectroscopy(XPS) and extended X-ray absorption fine structure(EXAFS) were used to characterize the structure of the mixture of molybdenum oxide and anatase calcined at 723 K. The results indicate ... X-ray photoelectron spectroscopy(XPS) and extended X-ray absorption fine structure(EXAFS) were used to characterize the structure of the mixture of molybdenum oxide and anatase calcined at 723 K. The results indicate that molybdenum oxide can disperse onto the surface of anatase(TiO 2) and the dispersion threshold is 11.2 mg in per gram of MoO 3 or 4.8 Mo atoms/nm 2 TiO 2. When the content of MoO 3 is below the dispersion threshold, MoO 3 species is in highly dispersed state interacting strongly with TiO 2 support and in discrete tetrahedral coordination, [MoO 4], on the surface of TiO 2. When the MoO 3 loading is above this value, MoO 3 exists in both dispersed phase and crystalline phase. MoO 3 in dispersed phase is still a discrete [MoO 4] tetrahedron; MoO 3 in crystal phase is in octahedral coordination. 展开更多
关键词 molybdenum trioxide ANATASE DISPERSION
下载PDF
氧化石墨烯复合α-MoO_(3)的制备以及电化学性能的研究 被引量:1
3
作者 王静 尚晨伟 +3 位作者 董国涛 葛烨 李育飞 徐立新 《化工新型材料》 CAS CSCD 北大核心 2024年第3期76-80,共5页
通过水热法制备了α-MoO_(3)纳米棒前驱体,再通过退火的方式制备出超长α-MoO_(3)纳米棒(10μm),采用超声法将α-MoO_(3)纳米棒锚定在氧化石墨烯(GO)纳米网之间,制备三明治结构的GO@MoO_(3)纳米材料,对其进行物相形貌分析和电化学测试... 通过水热法制备了α-MoO_(3)纳米棒前驱体,再通过退火的方式制备出超长α-MoO_(3)纳米棒(10μm),采用超声法将α-MoO_(3)纳米棒锚定在氧化石墨烯(GO)纳米网之间,制备三明治结构的GO@MoO_(3)纳米材料,对其进行物相形貌分析和电化学测试。实验结果表明,根据恒电流充放电曲线,GO@MoO_(3)电极在1A/g时显示出高达370F/g的高比容量,远高于原始MoO_(3)电极214F/g的比容量;根据循环伏安曲线,与原始的MoO_(3)电极相比,GO@MoO_(3)电极表现出显著增强的比电容,在5、10、20、30、40和50mV/s下,比电容可分别高达805、594、479、430、394和355F/g)。 展开更多
关键词 三氧化钼 氧化石墨烯 电化学 水热法
下载PDF
高纯三氧化钼粒度对粉末冶金钼板工艺特性与力学性能影响
4
作者 杨秦莉 赵虎 +4 位作者 厉学武 崔玉青 庄飞 杜一辰 高贤 《中国钼业》 2024年第1期35-39,共5页
粉末冶金轧制制板工艺中,原始粉末颗粒对还原、烧结和轧板工艺特性以及钼板力学性能有着非常重要的影响。采用3种不同粒度高纯MoO_(3)进行还原、烧结和轧制制备0.5 mm厚的钼板试验,研究了3种不同粒度原始粉末颗粒对MoO_(2)、钼粉以及钼... 粉末冶金轧制制板工艺中,原始粉末颗粒对还原、烧结和轧板工艺特性以及钼板力学性能有着非常重要的影响。采用3种不同粒度高纯MoO_(3)进行还原、烧结和轧制制备0.5 mm厚的钼板试验,研究了3种不同粒度原始粉末颗粒对MoO_(2)、钼粉以及钼板制备工艺性能和终板力学性能的影响。结果表明:经一段还原制备的3种MoO_(2)还原程度及微观形貌差异较大;二段不同还原工艺制备的钼粉指标也不同,大粒度钼粉的D50、D90/D50值都比小粒度钼粉的低,且团聚少,均匀分散;相同烧结、轧制工艺条件下,大粒度三氧化钼经还原、烧结制成的钼板坯性能较好;小粒度三氧化钼经950℃还原及后续加工制成的0.5 mm钼板力学性能较好。 展开更多
关键词 三氧化钼 粒度 还原 钼板 性能
下载PDF
MoO_(3-x)负载蜂窝状氮化碳的制备及其光热协同催化CO_(2)还原性能研究 被引量:1
5
作者 李晨露 王亚男 +1 位作者 徐松 李忠玉 《化学反应工程与工艺》 CAS 2024年第1期10-18,共9页
在传统光催化CO_(2)反应中引入热能是提高转化效率的新方法。通过一锅法将含氧空位缺陷的MoO_(3)(MoO_(3-x))均匀负载在蜂窝状氮化碳(NCN)表面,成功制备出不同MoO_(3-x)比例的MNCN复合催化剂。通过X射线粉末衍射、扫描电子显微镜、紫外... 在传统光催化CO_(2)反应中引入热能是提高转化效率的新方法。通过一锅法将含氧空位缺陷的MoO_(3)(MoO_(3-x))均匀负载在蜂窝状氮化碳(NCN)表面,成功制备出不同MoO_(3-x)比例的MNCN复合催化剂。通过X射线粉末衍射、扫描电子显微镜、紫外可见漫反射光谱、傅立叶变换红外光谱等手段对复合材料进行表征;在全光谱照射下,复合样品MNCN-1.0光热催化CO_(2)表现出优秀的性能,CO和CH_(4)的产率分别达到25.35μmol/(g·h)和1.80μmol/(g·h)。这是由于MoO_(3-x)独特的性质使其在全光谱反应中提高反应温度,促进温度场与光场的协同作用,提高了光催化的反应效率。 展开更多
关键词 光热催化 CO_(2)还原 蜂窝状氮化碳 氧缺陷三氧化钼 助催化剂
下载PDF
高纯钼粉的制备技术及研究进展 被引量:1
6
作者 段琳琳 屈航 +1 位作者 卜春阳 王宇晴 《中国钼业》 2024年第3期1-7,13,共8页
随着电子行业的精细化发展,高纯钼因其薄膜应力小、高温稳定性好,导电性能良好,比阻抗低广泛应用于电子行业。本文系统概述了高纯钼粉的制备技术,包括高纯钼原料(钼酸铵、MoO_(3)、MoCl_(5)、Mo(CO)_(6)、MoS_(3)等)清洁化还原分解技术... 随着电子行业的精细化发展,高纯钼因其薄膜应力小、高温稳定性好,导电性能良好,比阻抗低广泛应用于电子行业。本文系统概述了高纯钼粉的制备技术,包括高纯钼原料(钼酸铵、MoO_(3)、MoCl_(5)、Mo(CO)_(6)、MoS_(3)等)清洁化还原分解技术和普通钼粉电子束熔炼及等离子球化提纯技术,重点讨论了沉淀法、溶剂萃取法、离子交换法、结晶法等提高钼酸铵纯度的方法,指出了不同提纯方法存在的优势与不足,并就高纯钼粉制备技术及应用前景进行了总结与讨论。 展开更多
关键词 高纯钼粉 三氧化钼 纯度 电子行业
下载PDF
一步水热法制备MoO3纳米带/还原氧化石墨烯及其电化学性能
7
作者 吕星 罗成 梁桂杰 《粉末冶金技术》 CAS CSCD 北大核心 2024年第4期388-395,402,共9页
为了提高超级电容器电极材料三氧化钼(MoO_(3))的储能性能,通过一步水热法合成了MoO3纳米带/还原氧化石墨烯(reduced graphene oxide,RGO)复合材料,研究了水热法对复合材料的组织结构及电化学性能的影响。利用X射线衍射分析、扫描电子... 为了提高超级电容器电极材料三氧化钼(MoO_(3))的储能性能,通过一步水热法合成了MoO3纳米带/还原氧化石墨烯(reduced graphene oxide,RGO)复合材料,研究了水热法对复合材料的组织结构及电化学性能的影响。利用X射线衍射分析、扫描电子显微形貌观察、傅里叶变换红外光谱分析、循环伏安曲线、恒流充放电曲线等方法对材料的物相、形貌及电化学性能进行了表征。结果显示,通过一步水热法成功制得MoO_(3)纳米带/RGO复合材料,复合前MoO_(3)比电容为228 F∙g^(‒1),复合后比电容提高了17.5%。复合材料中MoO_(3)纳米带被还原氧化石墨烯包裹或者附着在还原氧化石墨烯表面,增强了材料的导电性并使其结构更稳定,从而提升了电化学性能。 展开更多
关键词 三氧化钼 水热合成 氧化石墨烯 超级电容器 比电容
下载PDF
Low-temperature Synthesis of Large-area Films of Molybdenum Trioxide Microbelts in Air and the Dependence of Their Field Emission Performance on Growth Conditions 被引量:7
8
作者 Dongmei Ban,Ningsheng Xu,Shaozhi Deng,Jun Chen and Juncong She State Key Lab of Optoelectronic Materials and Technologies,Guangdong Province Key Laboratory of Display Material and Technology,School of Physics and Engineering,Sun Yat-sen University,Guangzhou 510275,China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2010年第7期584-588,共5页
A simple method is introduced for the preparation of large-area films of molybdenum trioxide (MoO3) microbelts. It is found that such films can be grown on indium tin oxide (ITO) glasses or silicon substrates at l... A simple method is introduced for the preparation of large-area films of molybdenum trioxide (MoO3) microbelts. It is found that such films can be grown on indium tin oxide (ITO) glasses or silicon substrates at low temperatures by thermal evaporation deposition in air without using catalyst. Field emission measurements show that the turn-on field of the MoO3 microbelts is as low as 2.2 V/μm required to obtain a current density of 10 μA/cm^2, The combination of the simplicity of the growth method and the attractive field emission performance makes it a potential low-cost technique for the preparation of large-area field emission cold cathode material. 展开更多
关键词 Field emission Large-area film molybdenum trioxide Microstructures and synthesis
原文传递
熔盐法合成三钼酸钾超长纳米线及其生长机理研究
9
作者 李杰辉 胡柱东 《广东化工》 CAS 2024年第1期13-15,共3页
本文以硝酸锂-硝酸钠-硝酸钾三元硝酸盐为反应介质,以三氧化钼为原料,研究了反应温度、反应物/熔盐比例和清洗方式等因素对三钼酸钾纳米线制备的影响规律。进一步采用X射线衍射仪、扫描电子显微镜和透射电子显微镜对产物的结构和形貌进... 本文以硝酸锂-硝酸钠-硝酸钾三元硝酸盐为反应介质,以三氧化钼为原料,研究了反应温度、反应物/熔盐比例和清洗方式等因素对三钼酸钾纳米线制备的影响规律。进一步采用X射线衍射仪、扫描电子显微镜和透射电子显微镜对产物的结构和形貌进行表征。结果表明,在410℃反应40分钟,随后使用50%的乙醇冰水溶液洗涤,可以得到直径约200 nm、长径比超过2000的三钼酸钾超长纳米线。当反应温度低于160℃时,三氧化钼尚不能与熔盐反应。当反应温度高于170℃时,开始析出三钼酸钾纳米线。通过能谱分析可知,本研究中熔盐法制备的三钼酸钾纳米线的生长机理遵循溶解-析出的反应机制。降温过程中溶解的钼离子逐渐过饱和析出,进而与熔盐中的钾离子反应,形成三钼酸钾一维结构。 展开更多
关键词 三钼酸钾 纳米线 熔盐法 溶解-析出机理 三氧化钼
下载PDF
Membrane-less MoO_(3-x)@TiO_(2)-bromine battery with excellent rate capability and cyclic stability
10
作者 Wenjie Huang Hui Wang +3 位作者 Bin Yuan Liuzhang Ouyang Lichun Yang Min Zhu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第6期316-321,I0008,共7页
Bromine has attracted significant attention as a cathode material for aqueous batteries due to its high reduction potential of 1.05 V(Br_(3)^(-)+2e~-■3Br~-),impressive theoretical specific capacity of 223 mA h g^(-1)... Bromine has attracted significant attention as a cathode material for aqueous batteries due to its high reduction potential of 1.05 V(Br_(3)^(-)+2e~-■3Br~-),impressive theoretical specific capacity of 223 mA h g^(-1),and rapid reaction kinetics in the electrolyte.However,searching for compatible anode materials to match with bromine has posed a challenge due to its highly corrosive nature.In this study,we developed oxygen-deficient MoO_(3) with TiO_(2) coating(referred to as MoO_(3-x)@TiO_(2))as an anode material to pair with a bromine cathode in static full batteries.The oxygen deficiency contributes to enhanced electronic and protonic diffusion within the MoO_(3-x)lattice,while the TiO_(2) coating mitigates structural dissolution and proton trapping during cycling.The MoO_(3-x)@TiO_(2) demonstrates fast charge storage kinetics and excellent resistance to bromine corrosion.The impressive compatibility between MoO_(3-x)@TiO_(2) and bromine enables the construction of membrane-less full batteries with exceptional rate capability and cyclic stability.The MoO_(3-x)@TiO_(2)-bromine battery achieves an energy density of70.8 W h kg^(-1)at a power density of 328.1 W kg^(-1),showcasing an impressive long-term cyclic life of 20,000 cycles.Our study provides valuable insights for the development of high-performance aqueous secondary batteries. 展开更多
关键词 molybdenum trioxide Oxygen deficiency TiO_(2)coating Compatibility Bromine-based battery
下载PDF
Hydrogen peroxide enabled two-dimensional molybdenum trioxide nanosheet clusters for enhanced surface Li-ion storage 被引量:4
11
作者 Han Wei Hao-Yu Yang +3 位作者 Xiao-Qi Zhang Jian-Feng Zhu Peng-Peng Qiu Wei Luo 《Tungsten》 2021年第3期338-347,共10页
Molybdenum trioxide(MoO3)is regarded as a promising electrode material for lithium(Li)-ion batteries because of its unique layered structure with a high theoretical capacity(~1117 mAh·g-1).Till now,numerous resea... Molybdenum trioxide(MoO3)is regarded as a promising electrode material for lithium(Li)-ion batteries because of its unique layered structure with a high theoretical capacity(~1117 mAh·g-1).Till now,numerous researches have focused on tuning MoO3 morphology to improve its electrochemical performance.However,the fabrication of MoO3 with a two-dimensional(2D)nanosheet clusters structure has yet been achieved.Here,we report a facile one-step solvothermal method to prepare MoO3 nanosheets,of which the morphology can be facilely tuned via the dose of hydrogen peroxide.Both the experimental results and theoretical calculation suggest that the resultant 2D nanosheets structure could reduce the diffusion paths,which is beneficial for the intercalation of Li-ion.As a result,the nanosheets assembled Li-ion battery has a reversible specific capacity of 756.1 mAh·g-1 at 0.5·g-1,and maintained at 214.7 mAh·g-1 after 600 cycles at a current density of 1 A·g-1with the Coulombic efficiency as high as 97.17%. 展开更多
关键词 molybdenum trioxide One-step solvothermal method NANOSHEETS Lithium-ion batteries
原文传递
Realizing the Long Lifespan of Molybdenum Trioxide in Aqueous Aluminum Ion Batteries Through Potential Regulation 被引量:1
12
作者 Haodong Fan Xuejin Li +10 位作者 Jie Zhou Xiaoning Wang Xiuli Gao Haoyu Hu Li Zhou Tonghui Cai Yongpeng Cui Pengyun Liu Qingzhong Xue Zifeng Yan Wei Xing 《Renewables》 2023年第4期455-464,共10页
MoO_(3) is one of the most promising anode materials for aqueous aluminum batteries due to its high theoretical capacity and suitable aluminum insertion/de-insertion potential.However,the inferior cycling stability li... MoO_(3) is one of the most promising anode materials for aqueous aluminum batteries due to its high theoretical capacity and suitable aluminum insertion/de-insertion potential.However,the inferior cycling stability limits its further application,and the failure mechanism is still unclear.In this article,we provide a straightforward potential regulation technique to manage phase evolution during the charge/discharge process,which ultimately results in a markedly enhanced MoO_(3) electrode cycling stability.The failure mechanism study reveals that the excessive oxidation of the electrode during charge/discharge generates the H_(0.34)MoO_(3) phase,which has high solubility and is the primary cause of MoO_(3) deactivation.Although the dissolved Mo species will be deposited onto the electrode sheet again,the deposition is not electrochemically active and cannot contribute to the capacitance.Controlling the cutoff potential prevented the production of H_(0.34)MoO_(3),resulting in excellent cycling performance(80.1% capacity retention after 4000 cycles).The as-assembled α-MoO_(3)//MnO_(2) full battery exhibits high discharge plateaus(1.4 and 0.9 V),large specific capacity(200 mAhg^(-1) at 2 Ag^(-1)),and ultra-high coulombic efficiency(99%).The research presented here may contribute to the development of highly stable electrode materials for aqueous batteries. 展开更多
关键词 aqueous aluminum ion battery molybdenum trioxide potential regulation aqueous battery ANODE
原文传递
三氧化钼纳米材料的制备、表征及电化学性质研究
13
作者 历亳 刘立红 孙晶 《黑河学院学报》 2024年第2期183-184,共2页
三氧化钼纳米材料作为一种N型氧化物半导体材料,由于其丰富的结构、独特的理化性质在气体传感器、电化学传感器、光催化、锂离子电池等领域都具有广泛应用。采用水热合成技术并通过一步煅烧法设计合成新型三氧化钼纳米材料,并进行XRD、... 三氧化钼纳米材料作为一种N型氧化物半导体材料,由于其丰富的结构、独特的理化性质在气体传感器、电化学传感器、光催化、锂离子电池等领域都具有广泛应用。采用水热合成技术并通过一步煅烧法设计合成新型三氧化钼纳米材料,并进行XRD、SEM表征,将其制备成电化学传感器,用于对过氧化氢的超灵敏检测,其检测范围可达:0.013mM—0.306mM,检测限为4.3μM。 展开更多
关键词 三氧化钼 纳米材料 电化学性能 过氧化氢
下载PDF
三氧化钼包覆改性镍锰酸锂正极材料
14
作者 苏语婷 邢晓燕 李学田 《辽宁化工》 CAS 2024年第9期1399-1402,共4页
为了进一步提高镍锰酸锂正极材料的电化学性能,对其进行了三氧化钼包覆改性,分析结果表明:三氧化钼包覆没有改变镍锰酸锂正极材料的基本结构,在0.2C倍率下首次放电比容量为120 mAh·g^(-1),库仑效率为93.76%。50次循环后容量几乎没... 为了进一步提高镍锰酸锂正极材料的电化学性能,对其进行了三氧化钼包覆改性,分析结果表明:三氧化钼包覆没有改变镍锰酸锂正极材料的基本结构,在0.2C倍率下首次放电比容量为120 mAh·g^(-1),库仑效率为93.76%。50次循环后容量几乎没有衰减,说明适量的三氧化钼包覆改性镍锰酸锂正极材料会提高其电化学性能。 展开更多
关键词 镍锰酸锂 包覆改性 三氧化钼 电化学性能
下载PDF
Reduction characteristics of molybdenum trioxide with aluminum and silicon
15
作者 Hang-Yu Zhu Rong Gao +2 位作者 Wu-Tao Jin Long-Wu Qiu Zheng-Liang Xue 《Rare Metals》 SCIE EI CAS CSCD 2018年第7期621-624,共4页
Thermodynamics for reduction of molybdenum oxides by aluminum and silicon were calculated, and the results show that reduction reaction is feasible at a certain temperature region. Compared to the presence of CaO or C... Thermodynamics for reduction of molybdenum oxides by aluminum and silicon were calculated, and the results show that reduction reaction is feasible at a certain temperature region. Compared to the presence of CaO or CaCO3, reduction products of molybdenum trioxide with aluminum and silicon at various temperatures were detected by X-ray diffraction (XRD). Results show that molybdenum trioxide is reduced by aluminum or silicon step by step, and the intermediate product is MOO2. At 1000 ℃, molybdenum trioxide could be reduced to metal Mo by aluminum, and in the presence of CaO, metal Mo as the reduction product appears even at 800 ℃. In contrast, silicon could barely reduce molybdenum trioxide to metal Mo even at 1200℃. In the presence of CaO or CaCO3, reducibility of silicon increases significantly, and the reduction products are metal Mo and MoSi2. Altogether, CaO or CaCO3 performs two major roles in reduction process: restraining sublimation of MoO3 and decreasing the temperature of reducing MoO3 to metal Mo. 展开更多
关键词 molybdenum trioxide REDUCTION ALUMINUM SILICON Metallothermic
原文传递
Tuning the layer structure of molybdenum trioxide towards high-performance aqueous zinc-ion batteries
16
作者 Yu Tan Jinjun He +2 位作者 Bo Wang Cheng Chao Li Taihong Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第4期489-494,共6页
Aqueous zinc-ion batteries(ZIBs) have attracted significant attentions because of low cost and high reliability. However, conventional ZIBs are severely limited by the development of high energy density cathode materi... Aqueous zinc-ion batteries(ZIBs) have attracted significant attentions because of low cost and high reliability. However, conventional ZIBs are severely limited by the development of high energy density cathode materials with reversible Zn^(2+)insertion/extraction. Herein, a conducting polymer intercalated MoO_(3)(PMO) with extensively extended interlayer spacing is developed as a high-performance ZIBs cathode material. The interlayer spacing of PMO is prominently increased which results in an improved Zn^(2+)mobility during charge and discharge process. More significantly, the electrochemical results reveals that the intercalation of PANI facilitates the charge storage and reinforces the layered structure of MoO_(3), leading to a high capacity and good cycling stability. DFT calculation further reveals the intercalation of PANI into MoO_(3)significantly lower Zn^(2+)diffusion barrier. Benefit from these advantages, the ZIBs based on PMO electrode delivers a considerable capacity of 157 m Ah/g at 0.5 A/g and ameliorative stability with 63.4%capacity retention after 1000 cycles. 展开更多
关键词 molybdenum trioxide CATHODE Zinc ion batteries Polyaniline intercalation Layered structure
原文传递
镍助剂对碳化钼催化剂的二苯并噻吩加氢脱硫性能的影响 被引量:21
17
作者 靳广洲 朱建华 +2 位作者 樊秀菊 孙桂大 高俊斌 《催化学报》 SCIE EI CAS CSCD 北大核心 2006年第10期899-903,共5页
将MoO3和Ni-Mo混合氧化物在CH4/H2气氛中程序升温还原碳化制备了相应的碳化钼和碳化镍钼催化剂,X射线粉末衍射表征其物相分别为-βMo2C和Ni-Mo2C.考察了Ni助剂对碳化钼催化剂的制备及二苯并噻吩加氢脱硫反应性能的影响.结果表明,Ni助剂... 将MoO3和Ni-Mo混合氧化物在CH4/H2气氛中程序升温还原碳化制备了相应的碳化钼和碳化镍钼催化剂,X射线粉末衍射表征其物相分别为-βMo2C和Ni-Mo2C.考察了Ni助剂对碳化钼催化剂的制备及二苯并噻吩加氢脱硫反应性能的影响.结果表明,Ni助剂的加入降低了碳化钼催化剂所需的还原碳化温度,提高了催化剂的比表面积,并对其二苯并噻吩加氢脱硫反应活性有明显的促进作用.Ni助剂添加量以Ni/Mo原子比为0.3为宜,此时Ni和Mo之间的催化协同效应达到最佳.当反应压力为3.0 MPa,反应温度为330℃,空速8 h-1,H2/原料液体积比为500∶1时,625℃还原碳化制备的碳化镍钼催化剂对0.6%二苯并噻吩/环己烷溶液的二苯并噻吩转化率达到96.25%,较相应的碳化钼催化剂提高了1.57倍. 展开更多
关键词 三氧化钼 碳化钼 二苯并噻吩 加氢脱硫
下载PDF
碳化钼催化剂的制备及噻吩加氢脱硫性能 被引量:24
18
作者 靳广洲 朱建华 +2 位作者 俱虎良 孙桂大 高俊斌 《化工学报》 EI CAS CSCD 北大核心 2006年第4期799-804,共6页
以MoO3为前躯体,CH4/H2为还原碳化气,采用自制的程序升温还原碳化反应装置制备出Mo2C催化剂,并用XRD、BET进行表征.借助原位TGDTA方法研究了MoO3在CH4/H2气氛中的还原碳化历程和适宜的还原碳化温度.以噻吩/环己烷溶液为模型反应物,采用... 以MoO3为前躯体,CH4/H2为还原碳化气,采用自制的程序升温还原碳化反应装置制备出Mo2C催化剂,并用XRD、BET进行表征.借助原位TGDTA方法研究了MoO3在CH4/H2气氛中的还原碳化历程和适宜的还原碳化温度.以噻吩/环己烷溶液为模型反应物,采用高压微反色谱实验装置考察了制备的碳化钼催化剂的噻吩加氢脱硫反应性能.结果表明:程序升温条件下的局部规整反应可提高催化剂的比表面积,且制备的碳化钼催化剂具有较高的噻吩加氢脱硫反应活性,在体积分数为5%的噻吩/环己烷溶液中,反应压力为3.0MPa,空速为6h-1,H2/原料液体积比500∶1的反应条件下,370℃时的噻吩转化率达到98%以上,明显高于相应的硫化钼催化剂.还原碳化终温的提高,导致碳化钼催化剂比表面积的减少和表面积炭的增多,进而使其加氢脱硫反应活性降低.MoO3在CH4/H2气氛中的还原碳化历程应为MoO3→MoO2→MoOxCy→Mo2C,实验确定的适宜还原碳化温度为675℃. 展开更多
关键词 氧化钼 碳化钼 催化剂 噻吩 加氢脱硫
下载PDF
碳化钼的制备与表征 被引量:19
19
作者 靳广洲 樊秀菊 +2 位作者 孙桂大 高俊斌 朱建华 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2007年第3期504-508,共5页
以MoO3为前体,CH4/H2为还原碳化气,经程序升温还原碳化反应制备了Mo2C样品,并用TG- DTA、XRD、BET、SEM、XPS进行了表征.结果表明,MoO3在CH4/H2气氛中的还原碳化历程为MoO3→MoO2→MoOxCy→Mo2C,适宜的还原碳化温度为675℃.实验条... 以MoO3为前体,CH4/H2为还原碳化气,经程序升温还原碳化反应制备了Mo2C样品,并用TG- DTA、XRD、BET、SEM、XPS进行了表征.结果表明,MoO3在CH4/H2气氛中的还原碳化历程为MoO3→MoO2→MoOxCy→Mo2C,适宜的还原碳化温度为675℃.实验条件下制得的碳化钼晶相为β-Mo2C,表面呈现出形状规整、大小相对均一的片状颗粒,平均粒径约3.9μm.碳化钼表面有两种不同价态的钼原子,分别归属于Mo-C物种的Mo2+和Mo-O物种的Moδ+,以前者为主;碳物种由四种不同价态的碳原子组成,分别归属于C-Mo、C-C、C-H和C-O物种,以前者为主.随还原碳化反应温度的升高,制备的碳化钼颗粒增大,比表面积下降,C-C物种和C-H物种增加,表面积炭增多.由于积炭的覆盖和保护作用,碳化钼表面的Mo原子主要以Mo2+的Mo-C物种存在,只有少部分被氧钝化. 展开更多
关键词 氧化钼 碳化钼 制备 表征
下载PDF
MoO_3掺杂WO_3催化剂的制备及其光催化性能 被引量:10
20
作者 宋娟 宋继梅 +2 位作者 胡媛 陈盼盼 王为 《环境化学》 CAS CSCD 北大核心 2008年第6期721-725,共5页
采用低温水热法制备掺杂MoO3的WO3粉体,利用XRD,XPS,DRS和PL光谱对产物进行表征,以太阳光为光源对番红花红T溶液进行光催化降解研究.结果表明:MoO3掺杂含量为10%的WO3粉体对番红花红T溶液的脱色率为89.65%,COD去除率为88.9%.借助DRS和P... 采用低温水热法制备掺杂MoO3的WO3粉体,利用XRD,XPS,DRS和PL光谱对产物进行表征,以太阳光为光源对番红花红T溶液进行光催化降解研究.结果表明:MoO3掺杂含量为10%的WO3粉体对番红花红T溶液的脱色率为89.65%,COD去除率为88.9%.借助DRS和PL光谱分析结果,初步探讨了MoO3掺杂WO3粉体对番红花红T光催化降解的过程与机理. 展开更多
关键词 WO3 MOO3 光催化 掺杂
下载PDF
上一页 1 2 12 下一页 到第
使用帮助 返回顶部