Enhancing the selectivity of hydrogen isotopic water in membrane distillation by using graphene oxide
Enhancing the selectivity of hydrogen isotopic water in membrane distillation by using graphene oxide
复制标题
利用氧化石墨烯提高膜蒸馏中氢同位素水的选择性
DOI：
10.1016/j.memsci.2020.118237
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发表时间：
2020-09
影响因子：
9.5
通讯作者：
De-Li Luo
中科院分区：
文献类型：
--
作者：
Ming Wen;Min Chen;Guang-Kun Ren;Pei-Long Li;Chao Lv;Yong Yao;Yin-Ke Liu;Sun-Jie Deng;Zhe Zheng;Ci-Gang Xu;De-Li Luo
氢的同位素在可控核聚变和其他核过程等应用中发挥着越来越重要的作用，但从其混合物中直接分离同位素水仍然是能源密集型的，并且在很大程度上受到中等分离因子值的限制。在这项研究中，氧化石墨烯（GO）和还原氧化石墨烯（rGO）纳米片，结合优化的疏水性接枝全氟烷基硅烷（PFAS），已被用于提高膜蒸馏中的同位素水的选择性。以重水/轻水混合物为模型，系统评价了膜的渗透通量和同位素选择性。氧化石墨烯膜，特别是对于通过PFAS接枝的rGO，与商业膜相比，表现出增强的选择性和增加的同位素分离因子，这可能是由于无阻碍的纳米通道和近超疏水表面之间的有效协同作用。对于在750 °C下还原的接枝rGO -膜，已经实现了1.067的最大平均分离因子值以及0.47 kg m-2 h-1的渗透通量。此外，我们的研究表明，利用二维材料，如GO和rGO，可以是一种有效的途径，用于提高膜蒸馏中的同位素选择性，基于增加具有更高选择性的疏水水蒸气通道。
Isotopes of hydrogen are playing an increasingly important role in applications such as controllable nuclear fusion and other nuclear processes, yet directly separating isotopic water from its mixture is still energy-intensive and largely limited by the moderate separation factor values. In this study, Graphene oxide (GO) and reduced graphene oxide (rGO) nanosheets, combining optimized hydrophobicity by grafting perfluoroalkylsilanes (PFAS), have been used for improving the selectivity of isotopic water in membrane distillation. By utilizing heavy/light water mixture as a model, permeation flux and isotopic selectivity of the membranes are systematically evaluated. The graphene oxide membranes, particularly for the rGO grafted by PFAS, exhibit enhanced selectivity with an increased isotopic separation factor, as compared with that of commercial membranes, which is probably due to the efficient synergy between unimpeded nanochannels and near-super hydrophobic surface. A maximum mean separation factor value of 1.067, combined with a permeation flux of 0.47 kg m−2h−1have been achieved for the grafted rGO -membrane reduced at 750 °C. Furthermore, our study demonstrates utilizing two-dimensional materials, like GO and rGO, can be an effective avenue for promoting the isotopic selectivity in membrane distillation, based on increasing hydrophobic water vapor channels with higher selectivity.
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影响因子：
2.8
作者：
A. Chmielewski;G. Zakrzewska-Trznadel;N. Miljević;W. Hook
通讯作者：
A. Chmielewski;G. Zakrzewska-Trznadel;N. Miljević;W. Hook
影响因子：
--
作者：
Lin, Yue;Jin, Jie;Song, Mo
通讯作者：
Song, Mo
影响因子：
9.5
作者：
Fei, Fan;Cseri, Levente;Blanford, Christopher F.
通讯作者：
Blanford, Christopher F.
DOI：
10.1021/bk-1978-0068
发表时间：
1978-06
期刊：
--
影响因子：
--
作者：
H. K. Rae
通讯作者：
H. K. Rae
影响因子：
2.8
作者：
Huang, Jie;Ding, Shunmin;Zhang, Ning
通讯作者：
Zhang, Ning