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光催化二氧化碳还原制多碳产物的先进光催化剂设计与机制:现状与挑战

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Chinese Journal of Catalysis 2024年第5期60卷 25-41页

作者：杜晨宇盛剑平钟丰忆何烨 vitaliy P.Guro 孙艳娟董帆电子科技大学资源与环境学院四川成都611731 中国气象局气候资源经济转化重点开放实验室重庆401147 电子科技大学基础与前沿研究院碳中和与环境能源技术研究中心四川成都611731 乌兹别克斯坦共和国科学院通用和无机化学研究所乌兹别克斯坦什干100047

在可持续碳资源利用的研究中,光催化CO_(2)转化为高附加值化学品的前景日益凸显.相较于常见的CO_(2)还原产物如甲烷、一氧化碳或甲酸,具有两个或更多碳原子的C_(2+)化合物因其具有更高的附加值而备受关注.然而,目前的研究面临着C–C偶... 详细信息

在可持续碳资源利用的研究中,光催化CO_(2)转化为高附加值化学品的前景日益凸显.相较于常见的CO_(2)还原产物如甲烷、一氧化碳或甲酸,具有两个或更多碳原子的C_(2+)化合物因其具有更高的附加值而备受关注.然而,目前的研究面临着C–C偶联过程和多质子耦合电子转移效率的限制,导致光催化CO_(2)的还原反应产物主要为C1化合物.常规光催化剂难以突破这些动力学和热力学壁垒,导致目标产物C_(2+)化合物的生成量远低于实际工业应用所需要的水平.因此,开发具有良好性能的光催化剂,以实现C_(2+)化合物的高效制备,仍是当前面临的重要科学挑战.本文系统性地概述了光催化CO_(2)还原为C_(2+)化合物领域的最新研究进展.首先,从光催化的基本原理及C_(2+)产物的生成路径出发,在光催化剂设计方面,为突破C–C偶联和多质子耦合电子转移的限制,需要解决以下问题:(1)关键中间产物的生成与吸附转移;(2)活性位点对于中间产物的选择性;(3)光生电子的寿命与定向转移.随后,详细介绍了高效、高选择性光催化剂的合理设计策略,包括缺陷工程、双金属位点、表面等离子体共振以及异质结构造等.同时,深入探讨了C–C偶联和多电子偶联的质子转移过程的催化机制.最后,展望了光催化CO_(2)还原制C_(2+)高附加值产物的未来研究方向,催化剂设计与机制研究的关键方向包括:(1)设计高选择性和高效吸附*CO中间体的活性位点,以提升催化性能;(2)设计具有轨道匹配的双活性位点以减少邻近*CO中间体间的静电排斥,促进C–C耦合;(3)从分子轨道相互作用角度深入理解C–C耦合和电子转移过程,揭示反应机制;(4)鉴别反应过程中的自由基组分,阐明多质子耦合电子转移过程的机理.综上所述,本文系统地梳理了光催化CO_(2)还原制C_(2+)高附加值产物的研究进展、关键问题、催化剂设计原理以及未来研究方向,旨在为开发设计高效、高选择性催化剂提供有益的参考.

关键词： CO_(2)还原 C_(2+)产物光催化活性位反应机理

Newly identified Au-Ag-Bi-Te mineralization in the Aydindere skarn Fe and Cu deposit， Giresun， NE Turkey: implications of gold mineralization during retrograde skarn evolution

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Journal of Earth Science 2024年

作者： Ahmet Sasmaz vitaliy Sukach Serhiy Bondarenko Hryhorii Aleksiienko Hengameh Erfanian Kaseb Bilge Sasmaz Sergiy Kurylo Oleksandr Hrinchenko Volodymyr Somka Panagiotis Voudouris Department of Geology， Firat University Faculty of Geology and Geoenvironment， National and Kapodistrian University of Athens Mineralogy and Ore Formation of National Academy of Science， M.P.Semenenko Institute of Geochemistry 3. Department of Petroleum Engineering， Eqbal Lahoori Institute of Higher Education

This study investigates the mineralogy and mineral-chemistry of a newly discovered Au-Ag-Bi-Te mineralization at the Aydindere Fe-Cu skarn deposit， within the Pontides Tectonic Unit， northeastern Turkey. The mineralization is developed in the skarn zone at the contact between Upper Cretaceous andesite-pyroclastic rocks and a Paleocene-Eocene I-type granitoid. The principal ore minerals of the Aydindere Fe-Cu deposit are oxides (magnetite)， sulfides (pyrite-chalcopyrite-galena-sphalerite)， tellurides/sulfotellurides (tetradymite， hessite)， sulfosalts (wittichenite， emplectite， aikinite) and native gold-electrum. Skarn minerals include anhydrous phases (garnet) formed in a prograde stage and hydrous phases (amphibole， epidote， chlorite)， which were formed in a retrograde stage in association with quartz， adularia， apatite and late calcite. Sulfides， tellurides and sulfosalts are introduced during the retrograde stage. The Au-Ag-Bi-Te mineralization was detected for the first time within the western ore body of the Aydindere deposit， and occurs in calcite-bearing sulfide bodies that cut magnetite-garnet-amphibole-epidote skarns with magnetite ores of different grade， including massive magnetite. Chlorite geothermometry indicates formation of the Au-Ag-Bi-Te mineralization at temperatures between 300 and 250 °C， during the retrograde skarn evolution. Assuming the temperature is ～275°C， logfS2= -10.5 to -13， logfO2= -37 to -33， and logfTe2values range from approximately -12 to -8.5 were estimated. The available mineralogical and geological data (presences of magnetite， oxidized-type tellurides/sulfotellurides， and andraditic garnets， and absence of pyrrhotite and arsenopyrite) suggest that Aydindere is an oxidized Au-bearing skarn deposit. The discovery of Au-Ag-Bi-Te mineralization at Aydindere increases its productivity and requires more detailed exploration in the deposit for precious (Au， Ag) and critical (Bi， Te) metals.

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Acute acalculous cholecystitis in children

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World Journal of Gastroenterology 2018年第43期24卷 4870-4879页

作者： Dimitri Poddighe vitaliy Sazonov Department of Medicine School of MedicineNazarbayev University Pediatric Intensive Care Unit UMC National Research Center for Mother and Child Health

Acute acalculous cholecystitis(AAC) is the inflammatory disease of the gallbladder in the absence of gallstones. AAC is estimated to represent at least 50% to 70% of all cases of acute cholecystitis during childhood. Although this pathology was originally described in critically ill or post-surgical patients, most pediatric cases have been observed during several infectious diseases. In addition to cases caused by bacterial and parasitic infections, most pediatric reports after 2000 described children developing AAC during viral illnesses(such as Epstein-Barr virus and hepatitis A virus infections). Moreover, some pediatric cases have been associated with several underlying chronic diseases and, in particular, with immune-mediated disorders. Here, we review the epidemiological aspects of pediatric AAC, and we discuss etiology, pathophysiology and clinical management, according to the cases reported in the medical literature.

关键词： Acute acalculous cholecystitis Children Viral biliary disorders

Effectiveness of Bilateral Pulmonary Artery Banding in Patients with Hypoplastic Left Heart Syndrome and Congenital Heart Defects with a Functional Single Ventricle: A Single-Center Retrospective Study

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Congenital Heart Disease 2022年第3期17卷 365-374页

作者： vitaliy Suvorov Vladimir Zaitcev Karolina Andrzejczyk Saint Petersburg State Pediatric Medical University Saint-PetersburgRussia Academisch Medisch Centrum Universiteit van Amsterdam AmsterdamNetherlands

Background:Bilateral banding of the branches of the pulmonary artery in patients with hypoplastic left heart syndrome(HLHS)and other duct dependent critical neonatal heart malformations can significantly reduce the incidence of severe complications in the postoperative period,especially in severely unstable *** our study we compared different surgical techniques of bilateral pulmonary artery banding(PAB)in respect to their success in balancing systemic and pulmonary blood ***:We included 44 neonates with a HLHS and congenital heart diseases(CHD)with a functional single ventricle underwent a hybrid operation:bilateral PAB and patent ductus arteriosus *** hybrid surgery for method No.1 is performed as a one-stage procedure,together with patent ductus arteriosus(PDA)*** median sternotomy,two Gore-Tex 1–2 mm wide bands with a diameter of 3–3.5 mm are *** we apply method No.2 then the thread is used to create *** No.3 is distinguished by intraoperative assessment of blood flow at the site of narrowing of the branches of the pulmonary artery and optional stenting of the *** cuff for banding is made of Gore-Tex *** when applying method Nos.1 and 2 is assessed by the change in invasive blood pressure and oxygen saturation after narrowing of the branches of the pulmonary ***,with these techniques PDA stenting by inserting the introducer via pulmonary artery trunk is ***:HLHS with mitral or aortic valve atresia or both was present in 19 patients(43.1%),with severe left heart obstruction resulting in PDA dependent systemic circulation in 16 babies(36.4%).CHD with single ventricle physiology occurred in 9 patients(20.5%).14 babies(31.8%)undergo the procedure following the method No.1,8 patients(18.2%)method No.2 and 22 patients(50%)method ***/Qs=1/1 was achieved in 30 patients(30/44,68.1%):as a result of the method No.1 was achieved in 5 patients(5/14,35.7%),method No.2 in 4 patien

关键词： Bilateral banding hybrid Norwood procedure pulmonary banding hybrid approach HLHS surgery single ventricle

A New Three-Dimensional(3D)Printing Prepress Algorithm for Simulation of Planned Surgery for Congenital Heart Disease

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Congenital Heart Disease 2023年第5期18卷 491-505页

作者： vitaliy Suvorov Olga Loboda Maria Balakina Igor Kulczycki Department of Surgical Diseases of Children Saint Petersburg State Pediatric Medical UniversitySaint PetersburgRussia Higher School of Theoretical Mechanics Peter the Great Saint Petersburg Polytechnic UniversitySaint PetersburgRussia

Background:Three-dimensional printing technology may become a key factor in transforming clinical practice and in significant improvement of treatment *** introduction of this technique into pediatric cardiac surgery will allow us to study features of the anatomy and spatial relations of a defect and to simulate the optimal surgical repair on a printed model in every individual ***:We performed the prospective cohort study which included 29 children with congenital heart *** hearts and the great vessels were modeled and printed *** of the same cardiac areas were taken in the same planes and points at multislice computed tomography images(group 1)and on printed 3D models of the hearts(group 2).Pre-printing treatment of the multislice computed tomography data and 3D model preparation were performed according to a newly developed ***:The measurements taken on the 3D-printed cardiac models and the tomographic images did not differ significantly,which allowed us to conclude that the models were highly accurate and *** new algorithm greatly simplifies and speeds up the preparation of a 3D model for printing,while maintaining high accuracy and level of ***:The 3D-printed models provide an accurate preoperative assessment of the anatomy of a defect in each *** new algorithm has several important advantages over other available *** enable the development of customized preliminary plans for surgical repair of each specific complex congenital heart disease,predict possible issues,determine the optimal surgical tactics,and significantly improve surgical outcomes.

关键词： 3D printing imaging in cardiac surgery congenital heart disease modelling in cardiac surgery pediatric cardiology algorithmic modelling of the heart medical imaging 3D modelling

Plural interactions of space charge wave harmonics during the development of two-stream instability

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Chinese Physics B 2015年第9期24卷 332-336页

作者： Victor Kulish Alexander Lysenko Michael Rombovsky vitaliy Koval Iurii Volk National Aviation University Department of Theoretical Physics Sumy State University Department of General and Theoretical Physics

We construct a cubically nonlinear theory of plural interactions between harmonics of the growing space charge wave（SCW） during the development of the two-stream instability. It is shown that the SCW with a wide frequency spectrum is formed when the frequency of the first SCW harmonic is much lower than the critical frequency of the two-stream *** SCW has part of the spectrum in which higher harmonics have higher amplitudes. We analyze the dynamics of the plural harmonic interactions of the growing SCW and define the saturation harmonic levels. We find the mechanisms of forming the multiharmonic SCW for the waves with frequencies lower than the critical frequency and for the waves with frequencies that exceed the critical frequency.

关键词： two-stream instability three-wave parametric resonances space charge wave free-electron laser

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The impact of surgeon choices on costs associated with uncomplicated minimally invasive colectomy:you are not as important as you think

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Gastroenterology Report 2018年第2期6卷 108-113,I0002页

作者： John Tillou Deborah Nagle vitaliy Poylin Thomas Cataldo Division of Colon and Rectal Surgery Department of SurgeryBeth Israel Deaconess Medical CenterBostonMAUSA

Background:There is increasing public discussion about the escalating cost of healthcare in *** are no published data regarding the contribution of individual surgeons’choices on the cost of uncomplicated minimally invasive ***:A review of a hospital cost-accounting database of the direct costs related to the index operation and postoperative care of all patients who underwent elective minimally invasive segmental colectomy over a 1-year period was ***:A total of 111 cases were enrolled in this study,18 of which were performed *** average direct cost after minimally invasive colectomy was$*** cost of robotic colectomy was 53%greater than laparoscopic($7806 vs$5096,p<0.001).There was no statistically significant difference in overall costs among laparoscopic cases performed by three surgeons($5099 vs$5108 vs$5055,p¼0.987).Average operating room supply costs among the three surgeons were$1236,$1105 and$1030,respectively(p¼0.067),with a standard deviation of$328(6.4%of overall cost).Conclusions:No significant difference in overall costs between surgeons was demonstrated despite varied training,experience levels and operative *** costs are relatively institutionally fixed and minimally influenced by variations in individual surgeon preferences.

关键词： cost minimally invasive colectomy laparoscopy individual surgeon

Low temperature microwave-assisted vs conventional pyrolysis of various biomass feedstocks

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Journal of Natural Gas Chemistry 2012年第3期21卷 270-274页

作者： Peter Shuttleworth vitaliy Budarin Mark Gronnow James H.Clark Rafael Luque Green Chemistry Centre of Excellence University of YorkHeslingtonYO10 5DD YorkUK Departamento de Química Orgnica Universidad de CórdobaCampus de Excelencia Agroalimentario ceiA3Edif icio Marie Curie(C-3)Ctra Nnal IVKm 396E-14014CórdobaSpain

A comparison between conventional pyrolysis and a novel developed low-temperature microwave-assisted pyrolysis methodology has been performed for the valorisation of a range of biomass feedstocks including waste residues. Microwave pyrolysis was found to efficiently deliver comparable evolution of bio-gases in the system as compared with conventional pyrolysis at significantly reduced temperatures （120-180 ℃vs 250-400 ℃）. The gas obtained from microwave-assisted pyrolysis was found to contain CO2, CH4 and CO as major components as well

关键词： microwave-assisted pyrolysis biomass valorisation gas production

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Structural Changes and Electrodynamic Effects in Polymers under Fast Uniaxial Compression

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Chinese Journal of Polymer Science 2021年第5期39卷 601-609,I0007页

作者： Aleksey.I.Aleksandrov Ivan A.Aleksandrov vitaliy G.Shevchenko Aleksandr N.Ozerin N.S.Enikolopov Institute of Synthetic Polymeric Materials RAS 117393 Moscow Profsoyuznaya70 Russian Federation

Rheological explosion in polymers under uniaxial compression in an open volume occurs at the end of continuous rapid plastic deformation after several stages of *** types of polymers were chosen for this study:brittle glassy amorphous polystyrene and thermoplastic semi-crystalline *** pulses were detected during explosion,and their spectra were analyzed with two models.X-ray diffraction methods were used to investigate changes in the structure and morphology of polymers during deformation and rheological *** pores appear in polymer in this process,and their shape and size distribution were derived from X-ray *** main reason for the formation of pores in polymer samples in rheological explosion experiments is the intense microshifts in the polymer volume under the action of high applied pressure.

关键词： Polystyrene Polypropylene X-ray Mechanical properties Compression

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