Lingrui Zhang,Li Zhao,Yating Tan,Xiaobo Gong,Meng Zhu,Yong Liu,Yucheng Liu
Oil/water separation has become a global concern due to the increasing discharge of multi-component harmful oily wastewater. Super wetting membranes have been shown to be an effective material for oil/water separation. Ultra-high flux stainless-steel meshes (SSM) with superhydrophilicity and underwater superoleophobicity were fabricated by tannic acid (TA) modified ZIF-8 nanoparticles (TZIF-8) and two-dimensional MXene materials for oil/water separation. The TZIF-8 increased the interlayer space of MXene, enhancing the flux permeation (69,093 L m −2 h −1 ) and rejection of the composite membrane (TZIF-8@MXene/SSM). The TZIF-8@MXene/SSM membrane showed an underwater oil contact angle of 154.2°. The membrane maintained underwater superoleophobic after stability and durability tests, including various pH solutions, organic solvents, reusability, etc. In addition, the oil/water separation efficiency of TZIF-8@MXene/SSM membranes was higher than 99% after treatment in harsh conditions and recycling. The outstanding anti-fouling, stability, durability, and recyclability properties of TZIF-8@MXene/SSM membrane highlight the remarkable potential of membranes for complex oil/water separation process.
Xiaowei Hu,Maowei Luo,Mooeez ur Rehman,Junhao Sun,Hamzah A.S.M. Yaseen,Faisal Irshad,Yujun Zhao,Shengping Wang,Xinbin Ma
The electron-donating effect of supports on active metals has been reported to be beneficial to improve catalytic activity of heterogenized molecule catalysts for CO 2 hydrogenation to formic acid . However, this effect has not been discussed in depth from the perspective of reaction mechanism, especially for CO 2 activation with the combination of theoretical calculations. Herein, we report a catalyst prepared via anchoring RuCl 3 on a post-synthetic modified (PSM) zeolitic imidazolate framework-8 (ZIF-8) in which linkers 3-methyl-1,2,4-triazole (Mtz) with a surplus of uncoordinated N sites have been incorporated. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations reveal that uncoordinated N sites in linkers donate additional electron-density to Ru, resulting in the decrease of energy barrier of CO 2 activation. And the RuCl 3 @ZIF-8-Mtz(0.29) catalyst containing the most Mtz ligands displayed the highest catalytic performance for the CO 2 hydrogenation to formic acid as compared to RuCl 3 @ZIF-8-Mtz(0.15) and RuCl 3 @ZIF-8.
危险品化学品经营许可证（带存储）