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Electrocatalytic production of glycolic acid via oxalic acid reduction on titania debris supported on a TiO_(2)nanotube array

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Journal of Energy Chemistry 2022年第5期31卷 669-678页

作者： Francesco Pio Abramo Federica De Luca Rosalba Passalacqua Gabriele Centi Gianfranco Giorgianni Siglinda Perathoner Salvatore Abate Department of ChiBioFarAM(Industrial Chemistry) University of MessinaERIC aisbl and INSTM/CASPEV.le F.Stagno d’Alcontres 31Messina 98166Italy University of Calabria Department of Environmental EngineeringLaboratory of Industrial Chemistry and Catalysis Via P.Bucci87036 RendeCSItaly

Electrodes prepared by anodic oxidation of Ti foils are robust and not toxic materials for the electrocatalytic reduction of oxalic acid to glycolic acid, allowing the development of a renewable energy-driven process for producing an alcoholic compound from an organic acid at low potential and room temperature. Coupled with the electrochemical synthesis of the oxalic acid from CO_(2),this process represents a new green and low-carbon path to produce added value chemicals from CO_(2). Various electrodes prepared by anodic oxidation of Ti foils were investigated. They were characterized by the presence of a TiO_(2) nanotube array together with the presence of small patches, debris, or TiO_(2) nanoparticles. The concentration of oxygen vacancies, the amount of Ti^(3+) measured by X-ray photoelectron spectroscopy(XPS) and the intensity of the anodic peak measured by cyclic voltammetry, were positively correlated with the achieved oxalic acid conversion and glycolic acid yield. The analysis of the results indicates the presence of small amorphous TiO_(2) nanoparticles(or surface patches or debris) interacting with TiO_(2) nanotubes, the sites responsible for the conversion of oxalic acid and glycolic acid yield. By varying this structural characteristic of the electrodes, it is possible to tune the glycolic acid to glyoxylic acid relative ratio. A best cumulative Faradaic efficiency(FE) of about 84% with FE to glycolic acid around 60% and oxalic conversion about 30% was observed.

关键词： Oxalic acid TiO_(2)nanotubes Glyoxylic acid glycolic acid Electrocatalysis

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Bacterial cellulose/glycolic acid/glycerol composite membrane as a system to deliver glycolic acid for anti-aging treatment

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Journal of Bioresources and Bioproducts 2021年第2期6卷 129-141页

作者： Bricard Mbituyimana Lin Mao Sanming Hu Muhammad Wajid Ullah Kun Chen Lina Fu Weiwei Zhao Zhijun Shi Guang Yang Department of Biomedical Engineering College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China Department of Head and Neck Surgery&Communication Sciences School of MedicineDuke UniversityDurham 27710United States School of Mechanical and Electronic Engineering Wuhan Universit of TechnologyWuhan 430070China

glycolic acid(GA),as an anti-aging skincare ingredient,plays a pivotal role in anti-aging ***,its benefits could be overshadowed due to its side effects including skin burning and irritation when *** cellulose(BC)is a highly pure form of cellulose,biosynthesized in the form of a swollen membrane by several kinds of bacteria that was demonstrated to modulate the release of model drugs owing to its porous and 3D fibrous network structure,and glycerol(GL),as a plasticizer,could enhance the controlled drug ***,we report a topical controlled drug delivery system based on BC membrane,GA and GL for controlling sustainable release of GA to reduce its side effects on the skin,while maintaining its prolonged and maximum therapeutic *** results showed that the incorporation of GL increased the malleability and flexibility of BC/GA/GL membrane,as compared with BC/GA *** addition,the GL enhanced the control of the GA delivery,as evidenced by a higher swelling capacity and thereby a slower release of the GA from BC/GA/GL *** importantly,in vitro study indicated that both BC/GA and BC/GA/GL membranes could effectively stimulate endogenous collagen synthesis in NIH3T3 cells owing to the release of GA,and that BC/GA/GL membrane is more conducive to a long-term cell adhesion,spreading,and proliferation of NIH3T3 and HaCaT cells due to its lower and sustainable release of GA than BC/GA *** study suggests the BC/GL/GA composite membrane holds great promise as an appealing platform to control the release of GA to greatly promote renewal of skin cells for effective anti-aging treatment.

关键词： Bacterial cellulose glycolic acid Glycerol Biocompatibility Controlled drug release

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Clinical outcomes and 5-year follow-up results of keratosis pilaris treated by a high concentration of glycolic acid

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World Journal of Clinical Cases 2021年第18期9卷 4681-4689页

作者： Yan Tian Xiao-Xin Li Jiao-Jiao Zhang Qing Yun Si Zhang Jia-Yi Yu Xue-Jiao Feng Ai-Ting Xia Yang Kang Feng Huang Fang Wan Department of Dermatology Air Force Characteristic Medical CenterBeijing 100142China Center of Medical and Health Unit 71901 of PLALiaocheng 252000Shandong ProvinceChina

BACKGROUND Keratosis pilaris is a hereditary abnormal keratosis of the hair follicle ***-brown keratotic plugs in the pores and dark red keratotic papules at the openings of hair follicles can be seen,which contain coiled hair and are often accompanied by perifollicular erythema and *** acid can correct the abnormalities of hair follicular duct keratosis and eliminate excessive accumulation of *** also promotes skin metabolism and accelerates the melanin *** therapeutic effect is related to the glycolic acid *** To evaluate the efficacy and safety of a high concentration of glycolic acid in the treatment of keratosis pilaris,and to observe the outcomes at 5-year of *** Twenty-five participants were recruited and areas with typical keratosis pilaris were selected as testing *** concentrations of glycolic acid(50%or 70%)were applied to a circular area(d=8 cm,S=50 cm2)and repeated four times,on days 0,20,40 and *** each treatment and 20 d after the last treatment,on days 0,20,40,60,and 80 and at a 5-year follow-up,The number of follicular keratotic papules were counted and the extent of perifollicular erythema and pigmentation was *** the same time,the participants provided subjective evaluations of treatment efficacy and *** Treatment effectiveness was indicated by the percentage of keratotic papules in the test site,on days 20,40,60 and 80,which were 8%,12%,36%,and 60%,*** with day 0,each difference was significant(P0

关键词： Keratosis pilaris glycolic acid Keratotic papules Follicular erythema Melanin pigmentation

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Oxidation of glycerol with H_2O_2 on Pb-promoted Pd/γ-Al_2O_3 catalysts

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Chinese Journal of Catalysis 2016年第11期37卷 1982-1990页

作者： María L.Faroppa Juan J.Musci María E.Chiosso Claudia G.Caggiano Hernán P.Bideberripe José L.García Fierro Guillermo J.Siri Mónica L.Casella 布宜诺斯艾利斯西北国立大学 CIBA(CIT UNNOBACONICET) 拉普拉塔国立大学科学学院 CINDECA(CCT La Plata-CONICETUNLP) 拉普拉塔国立大学工程学院PIDCAT 西班牙国家研究委员会(CSIC)催化与石油化学研究所

A series of bimetallic Pd-Pb catalysts with a constant Pd content of 1 wt%and Pb/Pd atomic ratio from 0 to 1.6 supported on γ-Al2O3 were prepared and used for glycerol oxidation with H2O2 as the oxidizing agent at atmospheric pressure,45℃ and pH =*** morphology and dispersion of the catalysts were characterized by scanning electron microscopy-energy dispersive X-ray spectroscopy（SEM-EDX） and transmission electron microscopy（TEM）.The presence of an alloy phase in the bimetallic catalyst was detected by X-ray photoelectron spectroscopy（XPS）.Glycerol conversion obtained with the monometallic Pd catalyst was 19%,which was increased to 100%with the addition of *** four bimetallic PdPb catalysts were able to oxidize glycerol to dihydroxyacetone（DIHA） and the selectivity to DIHA reached 59%,58%,34%and 25%for PdPb0.25,PdPb0.50,PdPb1.00 and PdPbl.60 catalysts,respectively.

关键词： Palladium Bimetallic palladium-lead catalyst Hydrogen peroxide Glycerol oxidation Glyceric acid glycolic acid

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Evaluation of Two Highly Porous Microcrystalline Biphasic Calcium Phosphate-Based Bone Grafts for Bone Regeneration: An Experimental Study in Rabbits

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Journal of Materials Science and Chemical Engineering 2020年第6期8卷 8-30页

作者： Miguel Ángel Garcés-Villalá Sergio David Rico Sergio Gustavo Nazar Mariano Escudero-Pinel Víctor Galván-Josa José Luis Calvo-Guirado Department of Implant and Biomaterial Research Fundación Corazón de Jesús San Juan Argentina Facultad de Matemática Astronomía y Física Universidad Nacional de Córdoba Córdoba Argentina Department of Oral Surgery and Implant Dentistry Faculty of Health Sciences Universidad Católica San Antonio de Murcia Murcia Spain

A biphasic bone grafting biomaterial based on a mixture of calcium phosphates and beta-tricalcium phosphate (β-TCP) phases with high nanoporosity was synthesized. The synthesis route was based on calcium phosphate composition and the incorporation of glycolic acid as a pore former, giving a material composed of 97% β-TCP and 3% calcium orthophosphates (CaPO4). An in vitro study of the purity, microstructure, crystalline domain, and pores size for the material obtained was performed by SEM analysis as well as full structural characterization. The region of interest related to the surface was determined by the specific surface area measured with the BET method. In vivo evaluation of bone response was performed by implanting the new low-cost biphasic manufacturing material synthesized in this work, which was compared with a biphasic material of similar chemical and microstructural composition existing in the commercial market and with higher cost called Synergy Odontit® β-TCP. The materials were implanted separately into 5 mm diameter defects in the tibias of New Zealand White rabbits at 30, 60, and 90 days. The results obtained showed that the host tissue well accepted the new biphasic material;the presence of new bone formation was observed. A more complete resorption was observed for the new microcrystalline biphasic material compared to for a commercial β-TCP material.

关键词： Microcrystalline Beta-Tricalcium Phosphate Ceramic Bone Graft glycolic acid

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