scholarly journals Highly selective and high-performance osmotic power generators in subnanochannel membranes enabled by metal-organic frameworks

2021 ◽  
Vol 7 (10) ◽  
pp. eabe9924
Author(s):  
Yi-Cheng Liu ◽  
Li-Hsien Yeh ◽  
Min-Jie Zheng ◽  
Kevin C.-W. Wu

The electric organs of electric eels are able to convert ionic gradients into high-efficiency electricity because their electrocytes contain numerous “subnanoscale” protein ion channels that can achieve highly selective and ultrafast ion transport. Despite increasing awareness of blue energy production through nanochannel membranes, achieving high-performance energy output remains considerably unexplored. Here, we report on a heterogeneous subnanochannel membrane, consisting of a continuous UiO-66-NH2 metal-organic framework (MOF) and a highly ordered alumina nanochannel membrane. In the positively charged membrane, the angstrom-scale windows function as ionic filters for screening anions with different hydrated sizes. Driven by osmosis, the subnanochannel membrane can produce an exceptionally high Br−/NO3− selectivity of ~1240, hence yielding an unprecedented power of up to 26.8 W/m2 under a 100-fold KBr gradient. Achieving ultrahigh selective and ultrafast osmotic transport in ion channel–mimetic MOF-based membranes opens previously unexplored avenues toward advanced separation technologies and energy-harvesting devices.

2015 ◽  
Vol 51 (98) ◽  
pp. 17439-17442 ◽  
Author(s):  
Yan-Yuan Jia ◽  
Ying-Hui Zhang ◽  
Jian Xu ◽  
Rui Feng ◽  
Ming-Shi Zhang ◽  
...  

High efficiency adsorption and removal of toxic herbicides in an anionic metal–organic framework.


2021 ◽  
Author(s):  
Ning Liu ◽  
Qiaoqiao Zhang ◽  
Jingqi Guan

Seeking for low-cost and high-performance electrocatalysts for oxygen evolution reaction (OER) has drawn enormous research interest in the last few years. Reported herein is the topotactic construction of a binuclear...


2021 ◽  
Vol 46 (11) ◽  
pp. 7772-7781 ◽  
Author(s):  
Shasha Dou ◽  
Wanyu Zhang ◽  
Yuting Yang ◽  
Shuqing Zhou ◽  
Xianfa Rao ◽  
...  

2021 ◽  
Author(s):  
Naeime Salandari-Jolge ◽  
Ali A. Ensafi ◽  
Behzad Rezaei

Dipyridamole is a prescribed medication used to treat cardiovascular diseases, angina pectoris, imaging tests for heart patients, and myocardial infarction. Therefore, high selectivity and sensitivity, low cost, and high-performance speed...


2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Ziqi Wang ◽  
Liubing Dong ◽  
Weiyuan Huang ◽  
Hao Jia ◽  
Qinghe Zhao ◽  
...  

AbstractOwing to the merits of low cost, high safety and environmental benignity, rechargeable aqueous Zn-based batteries (ZBs) have gained tremendous attention in recent years. Nevertheless, the poor reversibility of Zn anodes that originates from dendrite growth, surface passivation and corrosion, severely hinders the further development of ZBs. To tackle these issues, here we report a Janus separator based on a Zn-ion conductive metal–organic framework (MOF) and reduced graphene oxide (rGO), which is able to regulate uniform Zn2+ flux and electron conduction simultaneously during battery operation. Facilitated by the MOF/rGO bifunctional interlayers, the Zn anodes demonstrate stable plating/stripping behavior (over 500 h at 1 mA cm−2), high Coulombic efficiency (99.2% at 2 mA cm−2 after 100 cycles) and reduced redox barrier. Moreover, it is also found that the Zn corrosion can be effectively retarded through diminishing the potential discrepancy on Zn surface. Such a separator engineering also saliently promotes the overall performance of Zn|MnO2 full cells, which deliver nearly 100% capacity retention after 2000 cycles at 4 A g−1 and high power density over 10 kW kg−1. This work provides a feasible route to the high-performance Zn anodes for ZBs.


2021 ◽  
Vol 371 ◽  
pp. 137826
Author(s):  
Xingyu Liu ◽  
Pingyuan Wang ◽  
Cuiping Chang ◽  
Yongmei Chen ◽  
Yanzhi Sun ◽  
...  

2021 ◽  
Author(s):  
Liwei Zhu ◽  
Ning Liu ◽  
Xincheng Lv ◽  
Ziqiu Zhang ◽  
Liangmin Yu ◽  
...  

A novel carbon nanomaterial with unique morphology was prepared and proven to be an effective material for EMWA and electrochemical energy storage.


Nanoscale ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 6201-6211
Author(s):  
Wenxia Chen ◽  
Wei Wei ◽  
Kefeng Wang ◽  
Nan Zhang ◽  
Guangliang Chen ◽  
...  

A MOF-derived CoPO hollow polyhedron structure is designed by simultaneous oxidation/phosphatization processes during Ar–N2 RF plasma discharge.


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