Chinese Academy of Sciences

Dalian University of Technology

Lu Wang

Can Li

Zongxuan Jiang

Yongchen Song

Jiafei Zhao

Zheng Ling

Yanghui Li

Yongna Zhang

Yuliang Zhang

Changrui Shi

Fuqiang Wang

The present disclosure provides a method for preparing a self-floating transparent nano ultrathin film. According to the present disclosure, the MXene film layer and the nano ultrathin film layer are sequentially subjected to suction filtration on the substrate material by utilizing a vacuum suction filtration technology, and thus a double-film structure is loaded on the substrate material; then an oxidant is subjected to oxidizing and bubbling on the MXene film layer in a permeation way, and thus the substrate material and the nano ultrathin film layer can be separated in a physical isolating manner. Finally, the nano ultrathin film is completely separated in a liquid phase floating separation manner. The nano ultrathin film prepared by the method provided by the present disclosure has a specific thickness and light transmittance through different loading capacities, and the substrate material can be repeatedly utilized.

Method for preparing self-floating transparent nano ultrathin film

The invention discloses a multi-metallic bulk catalyst with layered structure, wherein the metals in the multi-metallic bulk catalyst is consisted of a Group VIII metal M, at least one metal Mwith the valence of +3 and at least two Group VIB metals M+M, wherein (the mole number of M+the mole number of M):(the mole number of M+the mole number of M) is from 1:9 to 9:1; the mole number of M:the mole number of Mis from 1:5 to 5:1; and the mole number of M:the mole number of Mis from 1:5 to 5:1. The invention also discloses the preparation method and use of the above catalyst. The invention is use for the hydrodesulfurization of diesel distillate including 4,6-dimethyldibenzothiophene, wherein the catalyst exhibits a extreme high hydrodesulfurization activity. Thus, the ultra-deep hydrodesulfurization is achieved and the cost of the bulk catalyst is reduced.

Multi-metallic bulk catalyst with layered structure and method for the preparation and use thereof

A complex metal oxide catalyst comprising a Group VIII metal Mand at least two Group VIB metals Mand M, wherein the molar ratio of Group VIII metal Mto Group VIB metals M+Mis 1:9-9:1 and the molar ratio of the Group VIB metals Mand Mis 1:5 to 5:1. When applied to the hydrodesulfurization of diesel, the catalyst exhibits a super high HDS activity. The sulfur level in the diesel can be reduced from 1200 ppm to 27 ppm under a gentle operating condition.

Composite metal oxide catalyst and method for preparation and application thereof

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Dalian, China

Lu Wang