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Modulation synthesis of UiO‐66 and its outstanding adsorption properties towards low‐concentration methylene blue
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2021-01-07 , DOI: 10.1002/zaac.202000332 Xiaoguang Liu 1 , Qiushuo Mao 2 , Yan Li 2 , Yue Jiang 2 , Jialin Sun 2
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2021-01-07 , DOI: 10.1002/zaac.202000332 Xiaoguang Liu 1 , Qiushuo Mao 2 , Yan Li 2 , Yue Jiang 2 , Jialin Sun 2
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To improve UiO‐66’s adsorption capacity towards methylene blue (MB) of low concentrations, an efficient modulator, butyric acid, has been successfully employed to regulate its defect levels using a modulation method. The butyric acid regulated UiO‐66 has higher degree (6.08 %) of defects, larger mass loss (8.63 %) from 248 to 440 °C, lower BDC2−/Zr molar ratios (0.86) and higher specific surface area (1186 m2/g) than those (5.86 %, 6.98 %, 0.90, and 1024 m2/g, respectively) of the most studied acetic acid modulated one. Furthermore, its SEM images also show the near‐spherical shapes and the formation of many wrinkles/grooves on the outer rough surfaces. Hence when the concentration of MB is as low as 40 mg/L, it can still reach a higher adsorption capacity (143 mg/g) than the mostly studied acetic acid modulated one. The saturated adsorption capacity of UiO‐66 (Butyric acid) almost reaches 765 mg/g, much better than other adsorption materials. In comparison, the acetic acid regulated one shows slightly lower specific surface areas, less defective structures, smoother surface and more polyhedral shapes. It thus reaches a smaller adsorption capacity of about 97 mg/g despite in a rather short time (∼5 min). The underlying mechanism for the above different adsorption behaviors is also addressed. Overall, it is suggest that the butyric acid can significantly change the defect levels in UiO‐66 and thus improve its MB adsorption uptake.
中文翻译：
UiO-66的调制合成及其对低浓度亚甲基蓝的出色吸附性能
为了提高UiO-66对低浓度亚甲基蓝（MB）的吸附能力，已成功地使用一种有效的调节剂丁酸，通过调节方法来调节其缺陷水平。丁酸调节的UiO-66具有更高的缺陷度（6.08％），从248至440°C的质量损失更大（8.63％），更低的BDC 2- / Zr摩尔比（0.86）和更高的比表面积（1186 m）2 / g）（5.86％，6.98％，0.90和1024 m 2/克）分别是研究最多的乙酸调节剂。此外，它的SEM图像还显示出接近球形的形状以及在外部粗糙表面上形成的许多皱纹/凹槽。因此，当MB的浓度低至40 mg / L时，它仍可以比研究最多的乙酸调制的MB达到更高的吸附容量（143 mg / g）。UiO-66（丁酸）的饱和吸附容量几乎达到765 mg / g，远胜于其他吸附材料。相比之下，用乙酸调节的乙酸具有较低的比表面积，较少的缺陷结构，较光滑的表面和更多的多面体形状。因此，尽管在相当短的时间内（约5分钟），它的吸附容量仍较小，约为97 mg / g。还解决了上述不同吸附行为的潜在机理。全面的，
更新日期：2021-01-07
中文翻译：
UiO-66的调制合成及其对低浓度亚甲基蓝的出色吸附性能
为了提高UiO-66对低浓度亚甲基蓝（MB）的吸附能力，已成功地使用一种有效的调节剂丁酸，通过调节方法来调节其缺陷水平。丁酸调节的UiO-66具有更高的缺陷度（6.08％），从248至440°C的质量损失更大（8.63％），更低的BDC 2- / Zr摩尔比（0.86）和更高的比表面积（1186 m）2 / g）（5.86％，6.98％，0.90和1024 m 2/克）分别是研究最多的乙酸调节剂。此外，它的SEM图像还显示出接近球形的形状以及在外部粗糙表面上形成的许多皱纹/凹槽。因此，当MB的浓度低至40 mg / L时，它仍可以比研究最多的乙酸调制的MB达到更高的吸附容量（143 mg / g）。UiO-66（丁酸）的饱和吸附容量几乎达到765 mg / g，远胜于其他吸附材料。相比之下，用乙酸调节的乙酸具有较低的比表面积，较少的缺陷结构，较光滑的表面和更多的多面体形状。因此，尽管在相当短的时间内（约5分钟），它的吸附容量仍较小，约为97 mg / g。还解决了上述不同吸附行为的潜在机理。全面的，
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