Micro & Nano Letters
·
2017
·Vol. 12
·期 10
·744-748
·
IF 0.723
Ziai Liu,Xuyue Wang,Jinlong Song,Tamal Roy,Shude Li,Jiyu Liu,Liu Huang,Xin Liu,Zhuji Jin,Danyang Zhao
Oil pollution brings great challenge to environmental protection. Utilising oil–water separation device to separate and recycle oils is an environment-friendly approach to dispose mixtures containing oils. Pouring-type gravity-driven oil–water separation method based on extremely wettable materials is an interesting area of research because of its high separation velocity, selectivity and purity. However, the presence of water bridge results in low separation efficiency. Herein, the authors first synthesised a facile etching method and a dip-coating method to fabricate contrary extreme wettability sponges including superhydrophilic–underwater-superoleophobic (SHI–U-SOO) sponge and superhydrophobic–superoleophilic (SHO–SOI) sponge. Accordingly, they designed a three-way oil–water separation system whose left and right bottom tubes were installed with the SHI–U-SOO sponge and the SHO–SOI sponge, respectively. Water and oil separately flow out from the left and right tubes, thereby eliminating the water bridge and increasing separation efficiency, and still having ideal separation selectivity and separation purity. The developed three-way oil–water separation system has promising application prospects in disposing oil spills, oil leakage from factories and industrial effluents.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Qiyang Lin,Jia Yang,Jun Wang,Junhui Wang,Shuai Wang,Xin Ma,Hong Zhong
Xanthate, a high-consumption functional surfactant, poses health and environmental risks due to the presence of volatile sulfides and pungent odors. In this study, we designed a novel ether group enhanced xanthate collector, O-(2-( tert -butoxy)ethyl) xanthate (TBOEX), which exhibits low odor and excellent flotation performance. The high matching between the calculated and the experimental infrared spectrum confirms the existence of water-bridged self-assembly behaviour. Odor evaluation results show that TBOEX reduced the content of volatile sulfur organic compounds and volatile hydrocarbons by 54.2% and 88.6%, respectively, compared to isobutyl xanthate (IBX), effectively reducing odor production. Flotation experiments and Zeta potential measurements demonstrate that TBOEX adsorbs densely on the surface of chalcopyrite, while the rich hydroxide on the surface of pyrite hinders the self-assembly of the collector, resulting in good selectivity for chalcopyrite. DFT calculations further reveal that TBOEX can form a stable and tightly arranged adsorption layer bridged by water molecules on the surface of chalcopyrite through two paths, and interact with d orbitals of copper atoms in the form of Cu-S tetrahedra through π* orbitals, finally improving the flotation recovery of chalcopyrite. The discovery of the water-bridge self-assembly mechanism and interfacial adsorption behavior of TBOEX is expected to drive the targeted design of collectors.
研究领域:
矿物加工工程
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表面化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2017
·
IF 1.795
Yong-Qiang Chen,Yuan Tian,Dao-Li An
A new coordination framework, [Co2(L)2(bpy)2(H2O)]n (1) (H2L = (4-phenyl)-2,6-bis(4-carboxyphenyl)pyridine and bpy = 2,2′-bipyridine), has been prepared and structurally characterized. Complex 1 shows an interesting bi-chain substructure bridged by coordinated water molecules, which is further extended into a three-dimensional (3-D) supramolecular structure by π–π stacking interactions. Moreover, the magnetic properties and photocatalytic activity for degradation of methyl orange have been investigated.
研究领域:
配位化学
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材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Hailong Xu,Xuedan Song,Miaomiao Chen,Wei Bai,Jie Zhang,Min Ji
Heterogenization of frustrated Lewis pairs (FLPs) through supporting on solid materials can realize FLP recycling. However, only a few successful examples have achieved the full recycling of both Lewis acid (LA) and Lewis base (LB). Herein, we proposed an ingenious strategy to construct heterogeneous FLP catalysts by using ordinary water molecules as the chemical bridge to connect the LA and the LB and achieved complete immobilization of the FLP in a metal–organic framework. The as-prepared FLP/MIL-101(Cr) was characterized by a series of characterizations, demonstrating that the LB of the FLP was immobilized by a coordination unsaturated CrIII site on MIL-101(Cr) directly, and then the LA was anchored via the dissociated water molecule in the formation of a [LB–H]+[LA–OH]− adduct. FLP/MIL-101(Cr) as a nanocatalyst exhibited excellent structural stability in different solvents and temperatures. More importantly, it showed high activity for the catalytic-transfer hydrogenation of various compounds including alkenes, aldehydes, ketones, and imines. During the transfer hydrogenation of alkenes, FLP/MIL-101(Cr) was recycled at least six times without a loss of active components. The excellent cyclic property of FLP/MIL-101(Cr) was revealed to depend on the content of water in the system. In addition, several heterogeneous FLPs with different LBs were developed in the same way, indicating that the strategy of using water molecules as the bridges to bond the LA and the LB and complete the full recycling of the FLP is universal. This work provides a valuable strategy for the universal preparation of highly active and stable heterogeneous FLP nanocatalysts for further utilization.
研究领域:
催化
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
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