Vitamin B12 derived CoCNx composite confined in SBA-15 as highly effective catalyst to activate peroxymonosulfate for naproxen degradation

Publication date: 1 June 2020Source: Chemical Engineering Journal, Volume 389Author(s): Jifei Hou, Jingling Lin, Heyun Fu, Yuqiu Wan, Xiaolei Qu, Zhaoyi Xu, Shourong ZhengAbstractVitamin B12 confined in the pores of SBA-15 was converted into Co and N co-doped carbon composite (denoted as CoCNx), which was confined in the pores of SBA-15 (CoCNx@SBA-15) after pyrolysis. For comparison, CoCNx catalyst supported on SBA-15 (denoted as CoCNx/SBA-15) was prepared by the impregnation method using VB12 as CoCNx precursor followed by pyrolysis. The catalysts were fully characterized and naproxen (NPX) degradation by catalytic activation of peroxymonosulfate (PMS) on the catalysts was investigated. The characterization results showed that in contrast to CoCNx/SBA-15, CoCNx of CoCNx@SBA-15 was successfully confined in the pores of SBA-15. For catalytic PMS activation for NPX degradation, CoCNx@SBA-15 exhibited a much higher catalytic activity than CoCNx/SBA-15 and CoCNx as well as commonly used carbon-based and Co-based catalysts. Additionally, Co leaching from CoCNx@SBA-15 was substantially suppressed as compared with CoCNx/SBA-15. Accordingly, the removal of either Co or CNx from CoCNx@SBA-15 led to substantially decreased catalytic activity and a considerable synergistic effect was identified between active Co and CNx species for catalytic PMS activation. The reuse of CoCNx@SBA-15 in catalytic PMS activation showed a gradual catalyst deactivation, whereas the activity of the used cata...
Source: Chemical Engineering Journal - Category: Chemistry Source Type: research

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Publication date: Available online 1 April 2020Source: Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of LipidsAuthor(s): Florina Zakany, Tamas Kovacs, Gyorgy Panyi, Zoltan Varga
Source: Biochimica et Biophysica Acta (BBA) Molecular and Cell Biology of Lipids - Category: Lipidology Source Type: research
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Source: Journal of Obstetrics and Gynaecology Canada : JOGC - Category: OBGYN Tags: J Obstet Gynaecol Can Source Type: research
Authors: Feres M, Retamal-Valdes B, Faveri M, Duarte P, Shibli J, Soares GMS, Miranda T, Teles F, Goodson M, Hasturk H, Van Dyke T, Ehmke B, Eickholz P, Schlagenhauf U, Meyle J, Koch R, Kocher T, Hoffmann T, Kim TS, Kaner D, Figueiredo LC, Doyle H Abstract OBJECTIVE: The selection of proper outcome measures is a critical step in clinical research. Most randomized clinical trials (RCTs) assessing the effects of initial anti-infective periodontal therapies use surrogate outcomes as primary outcome variables, such as mean changes in probing depth (PD) or in clinical attachment. However, these parameters do not reflect...
Source: Journal of the International Academy of Periodontology - Category: Dentistry Tags: J Int Acad Periodontol Source Type: research
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Source: Journal of the International Academy of Periodontology - Category: Dentistry Tags: J Int Acad Periodontol Source Type: research
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Source: Journal of the International Academy of Periodontology - Category: Dentistry Tags: J Int Acad Periodontol Source Type: research
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Source: Journal of the International Academy of Periodontology - Category: Dentistry Tags: J Int Acad Periodontol Source Type: research
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Source: Journal of the International Academy of Periodontology - Category: Dentistry Tags: J Int Acad Periodontol Source Type: research
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Source: Contemporary Educational Psychology - Category: Child Development Source Type: research
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Source: Food Quality and Preference - Category: Food Science Source Type: research
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