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本文以二氰二胺和硝酸镍为原料通过煅烧法在900℃合成了镍/碳纳米管(Ni-CNT)的复合材料,采用X射线粉末衍射(XRD),扫描电镜(SEM),透射电镜(TEM),傅里叶变换红外光谱(FTIR)等手段对产物进行了表征,并对其磁性进行了测量。探讨了不同条件下(吸附时间、吸附剂量、pH)产物对刚果红溶液吸附性能的影响。结果表明,当吸附时间达到20 min、吸附剂用量达到1.0 g·L~(-1)且pH值在8时产物对刚果红的吸附率最高,达到97.8%。循环实验表明其五次吸附后依然保持良好的吸附率,且在磁场作用下,吸附剂易与溶液分离。 相似文献
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奈替米星-刚果红分光光度法测定奈替米星 总被引:3,自引:0,他引:3
在pH4.5~6.0和pH1.9~3.1的酸性条件下,奈替米星(NTM)与刚果红(CR)反应,分别生成红色和蓝色离子缔合物,使刚果红红色溶液褪色。前者最大褪色波长位于500nm处,表观摩尔吸光系数(ε)为2.55×104Lmol-1cm-1;奈替米星在0.04~9.5mg/L浓度范围内,遵从朗伯比尔定律。后果者也使奈替米星在一定浓度范围内遵从朗伯比尔定律,但灵敏度不及前者。本文探讨了适宜的反应条件、主要分析化学性质及两种不同酸度范围内的络合比。所拟定的方法简便、快速,用于市售奈替米星药物及人尿、人血清中奈替米星含量的测定,结果满意。 相似文献
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A spinel-type oxides ZnFe_2O_4 photocatalysts were prepared by citric acid complex method,and characterized with XRD,TG- DTA,FT-IR,TEM techniques.The photocatalytic activities were investigated by the degradation of C_3H_(22)N_6O_6S_2Na_2 by artificial visible Light.The results show that the photocatalytic activity of ZnFe_2O_4 is stable,under experimental conditions,the degradation rate of C3H22N6O6S2 is over 90% in 60min. 相似文献
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δ-FeOOH was synthesized by chemical reduction method, and its physical properties and microstructure were characterized. The adsorption and photocatalytic degradation of Congo red (CR) were studied by UV-Vis spectrophotometer. Taking the common Congo red in azo wastewater as a simulated pollutant, the effects of Congo red initial mass concentration, catalyst dosage, reaction time, and amount of hydrogen peroxide on the adsorption of δ-FeOOH and the photocatalytic degradation of CR were studied. The results showed that δ - FeOOH was amorphous and sheet structure, with a specific surface area up to 402.5 m2/g. Under the conditions of CR mass concentration of 250 mg/L and δ-FeOOH dosage of 20 mg, the removal rate of CR after 6 h was 100%, the adsorption capacity was 1225 mg/g, and the adsorption cycle could be 5 times. In wastewater with the mass concentration of CR of 250 mg/L, and the amount of catalyst δ-FeOOH of 30 mg, the degradation rate of CR was 99% under UV light for 40 min. Furthermore, the photocatalytic degradation rate could still be as high as 99% after 5 cycles. © 2023, Youke Publishing Co.,Ltd. All rights reserved. 相似文献
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以FeCl3和NaOH为原料,一步水热合成了α-FeOOH纳米线,通过XRD、SEM技术对材料进行表征,XRD表明该材料的成分是α-FeOOH,从SEM可看出该材料是线并形成网状。考察了其对刚果红的吸附性能,并研究了吸附时间和温度对吸附性能的影响;实验表明:α-FeOOH纳米线对于刚果红的吸附在很短的时间内到达平衡,平衡时间为12 min,动力学吸附行为更符合准二级动力学模型;刚果红在α-FeOOH纳米线的吸附符合Langmuir等温吸附模型,吸附容量为208.77 mg·g-1。 相似文献
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用刚果红分光光度法测定阳离子表面活性剂 总被引:6,自引:0,他引:6
在弱酸性的HCl-NaAc缓冲介质中,某些阳离子表面活性剂(CS)与刚果红(CR)反应,形成离子缔合物时,刚果红发生褪色作用,最大褪色波长分别在510nm(CR-溴化十六烷基吡啶(CPB)体系)、514nm(CR-十六烷基三甲基溴化铵(CTAB)体系)。在最大褪色波长处,CS的浓度在0~4.16×10-5mol.L-1(CPB体系)、0~3.18×10-5mol.L-1(CTAB体系)范围内遵守比尔定律,表观摩尔吸光系数为1.62×104L/(mol.cm)(CPB体系)、1.72×104L/(mol.cm)(CTAB体系),检出限为9.78×10-7mol.L-1(CPB体系)、1.04×10-6mol.L-1(CTAB体系)。方法具有较高的灵敏度和良好的选择性,用于水样中CS的测定,结果满意。 相似文献
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在pH 4.0 Britton-Robinson缓冲溶液中,室温条件下,刚果红和血红蛋白反应生成缔合微粒,使体系的共振散射信号明显增强,并在529 nm处有一最大的共振散射峰。在选定的条件下,血红蛋白质量浓度在0.060~1.680μg/mL范围内与ΔI呈良好的线性关系,据此建立了一种测定血红蛋白含量的新方法。该方法的线性回归方程为ΔI=39.24ρ-1.776,相关系数r为0.9998,检出限为7.0×10-3μg/mL,将方法应用于尿样中血红蛋白含量的检测,回收率为94.2%~95.2%。 相似文献