共查询到19条相似文献,搜索用时 123 毫秒
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介绍了用微波辐照均相制备α-Fe2O3胶体粒子的方法.实验表明:采用微波辐照均相制备,可在较短时间内得到均分散的α-Fe2O3粒子,其尺寸大且产量大. 相似文献
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在离子液体[BMIM]BF4-水中制备Cu2O粒子 总被引:1,自引:0,他引:1
以CuCl2.2H2O和NaOH为原料,离子液体1-丁基-3-甲基咪唑四氟硼酸盐[BMIM]BF4-水混合溶剂为介质,利用化学还原法在112℃反应12 h合成了Cu2O粒子,考察了[BMIM]BF4对产物的影响。用XRD、ESEM/EDS和TEM/SAED对Cu2O粒子进行了结构和形貌表征;用FTIR和TG/DSC证实了离子液体修饰在Cu2O粒子的表面,从而有效地阻止了Cu2O粒子的氧化和团聚;用紫外-可见吸收光谱估测了Cu2O粒子的带隙能量为2.38 eV。离子液体在反应中发挥了还原剂、稳定剂、分散剂和模板剂的多重作用。 相似文献
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介绍了用微波辐照均相制备α-Fe2O3胶体粒子的方法。实验表明:采用微波辐照均相制备,可在较短时间内得到均匀分散的α-Fe2O3粒子,其尺寸大且产量大。 相似文献
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采用浸渍法研制了Cu O-Ce O2/γ-Al2O3负载型粒子电极,通过扫描电镜(SEM)对粒子电极微观机构、形貌进行表征,将Cu O-Ce O2/γ-Al2O3负载型粒子电极与活性炭填充于电解槽中,考察催化剂强化电化学降解活性艳橙X-GN染料的效果,通过实验确定适宜反应条件。结果表明,Cu O-Ce O2/γ-Al2O3表面晶型明显且结构牢固,具有较大的比表面积和粗糙度;槽电压15 V,初始p H为3.83,支持电解质Na2SO4的质量浓度为16 g/L,曝气体积流量为40 L/h,在此条件下,脱色率可达99.0%以上。采用紫外-可见光谱对反应中间产物进行定性分析显示,以Cu O-Ce O2/γ-Al2O3负载型三维粒子电极降解水中活性艳橙X-GN具有很好的脱色效果。 相似文献
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采用电化学恒电位沉积方法在ITO导电玻璃上和在ZnO薄膜上沉积氧化亚铜(Cu2O),并通过X射线衍射(XRD)和扫描电镜(SEM)对晶体的微观结构和表面形貌进行了分析.在ZnO基底上沉积得到了纳米级的Cu2O粒子并且具有明显择优取向,而在ITO导电玻璃上仅得到粒径为2—5胛的Cu2O粒子,没有明显的择优取向,对薄膜的生长机理进行了讨论. 相似文献
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以氢氧化铜为前躯体,苯甲酸乙酯为溶剂,采用溶剂热法,一步制备了硬脂酸修饰的氧化铜(SA-Cu O)纳米颗粒,并合成了石蜡油基Cu O纳米流体。对产物进行了沉降实验、X-射线衍射(XRD)、红外光谱(FT-IR)和扫描电镜(SEM)表征并测定了Cu O纳米流体的导热系数。结果显示,SA-Cu O纳米粒子在石蜡油中具有良好的分散稳定性;SA-Cu O纳米粒子属于黑铜矿晶体结构,形貌为片状颗粒,尺寸约为30~120 nm。Cu O纳米流体导热系数与SA-Cu O纳米粒子的质量分数呈正比,SA-Cu O纳米粒子能显著提高石蜡油的导热系数,仅添加4.0 wt%的Cu O纳米粒子,石蜡油的导热系数提高了2.21~2.28倍。 相似文献
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在碱性条件下,葡萄糖和水合肼还原硫酸铜制备了超细氧化亚铜。采用扫描电镜(SEM)和X衍射仪(XRD)进行表征,并在太阳光照条件下用氧化亚铜处理台盼蓝溶液,考察其对污水处理的光催化降解性能。考察了温度、台盼蓝初始浓度、光照时间、催化剂用量对台盼蓝溶液脱色率的影响,结果表明,超细氧化亚铜粒子粒径约为1μm,分散性较好;0.2g氧化亚铜在30℃太阳光照射1.5h条件下,处理50mL(15mg.L-1)的台盼蓝溶液脱色率为98.8%,氧化亚铜在重复使用4次后脱色率为87.8%。 相似文献
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通过化学合成方法得到分散均匀的氧化亚铜方块,在此基础上以其作为硬模板采用模板技术,以六水合二氯化镍为金属源,通过“协同刻蚀”的方法获得氢氧化镍空心壳材料,并进一步热处理得到氧化镍空心壳材料。经过透射电子显微镜(TEM),并结合广角X射线衍射等手段,证实所得材料为空心氧化镍材料。通过在旁热式气敏元件表面简单涂抹的办法制得气敏器件,并对其正丁醇气敏性能进行了测定。研究结果表明,该种材料在250 ℃下对正丁醇具有较好的敏感性,这表明该种材料是一种非常有前途的功能材料,有望获得广泛应用。 相似文献
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Jeong Ho Lee Sung Kyu Hong Weon Bae Ko 《Journal of Industrial and Engineering Chemistry》2010,16(4):564-566
Cuprous oxide nanoparticles were synthesized under microwave irradiation for 15 min to use as a catalyst. The product was confirmed by X-ray diffraction and transmission electron microscopy. The catalytic effect of cuprous oxide nanoparticles was investigated for the reduction of 4-nitrophenol to produce 4-aminophenol in the presence of NaBH4. The above product was confirmed by UV–vis spectroscopy and liquid chromatography–mass spectroscopy. 相似文献
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国内甲醇产能约3000万t/a,可综合利用的废弃甲醇合成催化剂约3000t/a,笔者研究了一种从废弃甲醇合成催化剂中回收氯化亚铜和氧化锌的新工艺.简述了回收氯化亚铜和氧化锌的制备原理;论述了废弃催化剂的预处理工艺条件以及浸取制备氯化亚铜和氧化锌的工艺条件.研究结果表明:回收的氯化亚铜产品质量可达到GB1619-79中标... 相似文献
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催化转化法由低品位铜矿制备活性氯化亚铜 总被引:7,自引:2,他引:5
研究了由低品位铜矿或含铜矿渣经催化转化法紧铜氨络合物,经蒸氨制得纯净的氧化铜,再经过酸溶,氧化还原等过程制得氯化亚铜的工艺过程。 相似文献
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Practical electrosynthesis of cuprous oxide powder was carried out on a laboratory scale in a cell specially constructed both with and without a diaphragm under the various operating conditions guided by the authors' previous research. The electrolysis was appraised in terms of the quality of the cuprous oxide product, the electrodissolution of the copper anode, and the SEM microstructure of the cuprous oxide powder. In a cell having a diaphragm, of which nylon fabric is the best, the optimal electrolysis operating conditions are: 250gl–1 NaCl, 0.1–1.0gl–1 NaOH, 500–1500Am–2, 80°C, perforated titanium sheet as the cathode, and around 3% cell volume of electrolyte circulation per minute. Under these conditions a product containing more than 97% cuprous oxide can easily be produced with very stable electrolysis and quite uniform dissolution of the copper anode. To eliminate the use of a diaphragm in the cell, the addition of sodium chromate, sodium dichromate, or calcium gluconate is effective in a sense, depending upon the requirements of the cuprous oxide product. For a product in which more than 95% cuprous oxide and no copper powder are required but a slightly higher content of chloride is allowable, sodium chromate and dichromate can be proposed for use with the former around 0.03–0.05gl–1 and the latter around 0.020–0.025gl–1, although the copper anode will not be perfectly evenly dissolved. For a product in which more than 97% cuprous oxide is demanded and a very small amount of copper powder is tolerated, calcium gluconate would be acceptable at around 4.5gl–1 with quite even dissolution of the copper anode. As to the auxiliary additives, hydrazine hydrate has a negative effect on the quality of the cuprous oxide product. Sucrose can cause a small increase in the chloride content but can make the particles of cuprous oxide more compact thereby increasing sharply its apparent density. Hydroxylamine hydrochloride is the best auxiliary additive which has a positive effect on the purity of the cuprous oxide product but produces no obvious change in the microstructure on the cuprous oxide particles. Even though most work has been concentrated on the electrolytic process, the subsequent processes are equally important: 65–70°C, distilled water for washing, benzotriazole in ethanol solution for stabilization of the cuprous oxide, and 100°C at a vacuum of less than 20mm Hg for drying seem to be satisfactory. A vacuum drying temperature of 55–60°C may be more appropriate to ensure against any oxidation of the product. 相似文献