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Chen Haisheng,Zhou Wei,Liang Mingxia,Lan Hailin 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10
Whether a company"s ownership structure is good or not is often justified by corporate performance and technical efficiency. Statistics in this article finds that among listed companies after technology mergers and acquisitions (M&A), above half of them have short-term benefits decline significantly. Considering the Strong reliance of knowledge transfer on the environment, while taking the restraining level of benefit decline after technology M&A as a short-term evaluation standard for ownership structure choice, this paper researches the critical role of ownership structures in curbing the decrease of benefits after technology M&A. And the empirical data of listed companies indicates that in listed companies with high ownership concentration, the "supporting effect" of majority shareholders" behavior can exert more influence to curb the benefit decline after technology M&A than the "tunneling effect". Moreover, the ownership balance in large degree will confine the majority stockholders" will and behaviro, which therefore can weaken their "support effect"and aggravate the benefit edcline after technology M&A.
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Fabrication of recyclable UiO-66-NH2/PVDF hybrid fibrous membrane for Cr(VI) removal in wastewater
Fan Yu,Liusha Cen,Caihong Lei,Feichao Zhu,Lan Zhou,Hailin Zhu,Bin Yu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.123 No.-
Efficient and recyclable water treatment technology plays a vital role in practical application of Cr(Ⅵ)removal. Zr-based metal–organic framework (UiO-66-NH2) is widely used in wastewater treatmentdue to its water stability. Powdery UiO-66-NH2 has disadvantages of easy aggregation, reclamation difficultyand secondary pollution. In this work, UiO-66-NH2 was successfully loaded on electrospunpolyvinylidene fluoride (PVDF) fibers by in-situ growth to achieve efficient adsorption and photoreductionof Cr(Ⅵ). Grooved surface of PVDF fibers and truncated octahedron shape of UiO-66-NH2 ensuredthe loading uniformity and firmness. The loading rate and size of UiO-66-NH2 crystals increased withthe amount of trifluoroacetic acid (TFA) in the preparation process. Meantime, the introduction of TFAin synthesis was conducive to the separation efficiency of photogenerated carries. When the additionamount of TFA was 5 ml, UiO-PVDF-3 with loading rate of 44.8% exhibited best Cr(VI) adsorption andphotocatalysis performance. For the pure adsorption process, the adsorption capacity of UiO-PVDF-3 at90 min was 3.76 mg/cm2, and the corresponding removal rate was 95.8%. When visible light was applied,the Cr(VI) removal rate for UiO-PVDF-3 reached to about 95.0% at 45 min. Furthermore, regenerationexperiments showed UiO-PVDF-3 had excellent adsorption and photocatalysis reusability. Based on thismethod, synthesized UiO-66-NH2/PVDF hybrid membrane as a bifunctional material for adsorption andphotocatalysis realizes the reuse of UiO-66-NH2 crystals conveniently and avoids secondary pollutionduring Cr(VI) wastewater treatment.
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