Treatment of Sjogren's Syndrome with Liver Depression

Liu Chunying is a famous old Chinese medicine doctor for more than 30 years.He has rich experience in the understanding and treatment of Sjogren's syndrome(SS).Liu Shi systematically discusses the etiology and pathogenesis of SS from the angle of liver depression.In the treatment,it is emphasized that"Muyu Da Zhi"is the first,with the addition and subtraction of the disease,to provide a new idea for the treatment of Sjogren's syndrome from liver depression,and to attach a test case.

第一性原理计算应用于锂硫电池研究的评述

锂硫电池凭借超高理论容量和能量密度以及硫储量丰富和环境友好等优势被认为是极具发展前景的新一代高能电池体系。然而,活性硫及放电终产物导电性差、多硫化物穿梭效应、硫反应动力学缓慢等关键问题严重制约了其实际应用。研究人员采用硫正极设计、功能隔膜/中间层、电解质改性或固体电解质等策略,在解决以上问题方面取得重要进展。然而,针对锂硫电池内部实时动态反应过程、规律和机制以及电极/电解质界面设计调控策略仍缺乏深入认识。第一性原理计算逐渐发展为化学、材料、能源等诸多学科领域的重要研究工具,有助于从原子/分子水平理解反应中间产物性质、分子/电子间相互作用、电化学反应过程和规律、电极/电解质动态演化过程等,相较于“实验试错法”,其在研究锂硫电池内部多电子和多离子氧化还原反应方面具有显著优势。本文全面综述了运用第一性原理计算研究锂硫电池电极与多硫化物相互作用、充放电反应机制以及电解质三个方面的重要进展,展望了第一性原理计算应用于锂硫电池研究的当前挑战和未来发展方向。

Facile and environment friendly synthesis of hierarchical BiOCl flowery microspheres with remarkable photocatalytic properties

A facile and environment friendly approach to synthesis of unique hierarchical BiOCl flowery microspheres(FMs)using a biodegradable surfactant polyvinyl alcohol(PVA)was reported herein for the first time.Compared to the BiOCl nanosheets synthesized in the absence of PVA,hierarchical BiOCl FMs consist of large amounts of interwoven polycrystalline nanosheets that assemble into a porous flowery structure.The formation mechanism of the hierarchical BiOCl FMs was also proposed,whereby PVA was believed to play a key role in the crystal growth and the formation of the final microstructures.Compared with TiO2-P25 and BiOCl nanosheets,hierarchical BiOCl FMs displayed remarkably enhanced photocatalytic activity,and20 mg of BiOCl FMs could completely degrade 50 mL of methyl orange solution(20 mg/L)within 30 min under UVlight irradiation.According to the comprehensive analysis,it can be concluded that the larger specific surface area,porosity,suitable band gap,and the enhanced light absorption capacity may contribute to the remarkably enhanced photocatalytic activity.This facile and green approach to fabricating hierarchical BiOCl FMs would give vital clues to develop new route for synthesizing other hierarchical structured materials.

Electrochemical hydrogenation of mixed-phase TiO2 nanotube arrays enables remarkably enhanced photoelectrochemical water splitting performance

We first report that photoelectrochemical(PEC)performance of electrochemically hydrogenated TiO_2 nanotube arrays(TNTAs)as high-efficiency photoanodes for solar water splitting could be well tuned by designing and adjusting the phase structure and composition of TNTAs.Among various TNTAs annealed at different temperature ranging from 300 to 700°C,well-crystallized single anatase(A)phase TNTAs-400 photoanode shows the best photoresponse properties and PEC performance due to the favorable crystallinity,grain size and tubular structures.After electrochemical hydrogenation(EH),anataserutile(A-R)mixed phase EH-TNTAs-600 photoanode exhibits the highest photoactivity and PEC performance for solar water splitting.Under simulated solar illumination,EH-TNTAs-600 achieves the best photoconversion efficiency of up to 1.52% and maximum H_2 generation rate of 40.4 mmol h^(-1)cm^(-2),outstripping other EH-TNTAs photoanodes.Systematic studies reveal that the signigicantly enhanced PEC performance for A-R mixed phaes EH-TNTAs-600 photoanode could be attributed to the synergy of A-R mixed phases and intentionally introduced Ti^(3+)(oxygen vacancies)which enhances the photoactivity over both UV and visible-light regions,and boosts both charge separation and transfer efficiencies.These findings provide new insight and guidelines for the construction of highly efficient TiO_2-based devices for the application of solar water splitting.

Binding Se into nitrogen-doped porous carbon nanosheets for high-performance potassium storage

Selenium cathode has been demonstrated as a promising candidate of cathode material for low-cost and high-energy density potassium ion batteries(PIBs).Nevertheless,their applica tions are prevented by poor electrochemical perfor-mance due to the shuttle effect of high-order polyselenides,the sluggish diffu-sion of bigger K+,and the huge volumetric expansion during cycling.In this work,we design a multifunctional Se host(N-HCNS)by grafting ZIF-8 derived microporous carbon onto the surface of N-doped porous carbon nanosheets.The obtained N-HCNS carbon matrix integrates conductivity,captivity,and immobility abilities,which inhibits the polyselenides shuttle,improves the Se utilization,and buffers the volume change during cycling.The 3D hollow car-bon skeleton enhances the infiltration of electrolytes.As an cathode for PIBs,the Se@N-HCNS electrode delivers an unprecedented life-span(260 mAh g1 at 1.0 Ag-1 after 2000 cycles)and exhibits a remarkable rate capacity(339 mAh g at 5.0 Ag-l).Density functional theory(DFT)calculation reveals the effective adsorption of K2Se with pyridine and pyrrole nitrogen dop-ing in carbon matrix.The unique synergetic design of electrode not only gives insight into the reaction mechanism but also highly emphasi zes the potential capabilities of N doped carbon in K-Se batteries.

Construction of WO_(3)/Ti-doped WO_(3)bi-layer nanopore arrays with superior electrochromic and capacitive performances

Crystalline WO_(3)/Ti-doped WO_(3)bi-layer nanopore arrays were constructed by the template synthesis of a WO_(3)nanopore layer modified by a magnetron sputtering of an amorphous Ti-doped/WO_(3)layer.The obtained bi-layer nanopore array shows a remarkable electrochromic performance with large dual-band optical modulation in both visible(VIS)and near infrared(NIR)regions(optical modulation of over 70%in the wavelength range from 600 to 1600 nm)and the fast response speed(coloring for 3.4 s and bleaching for 6.6 s).In addition,the bi-layer WO_(3)/Ti-doped WO_(3)nanopore array also present superior energy-storage properties(areal capacitance of 44.0 mF cm−2 and good rate capability),better than that of titanium-free thin films.The special bifunctional characteristics of electrochromism and pseudocapacitance can be ascribed to the large specific surface area provided by the architectural design,rich ion channels in the amorphous layer as well as proper titanium doping,which bestows the bi-layer nanopore array a great potential in clean energy applications.

Corrosion resistance and mechanical properties of (Ho,Nd)FeB magnets

(Ho,Nd)FeB magnets with different Ho contents were prepared by Ho substitution for part of Nd during the casting process.Effects of Ho contents on the corrosion resistance and mechanical properties of(Ho,Nd)FeB magnets were analyzed by a highly accelerated aging tester,an electrochemical workstation,a microhardness tester,a bending tester,a scanning electron microscope and an X-ray diffractometer.Results show that the addition of Ho can change the main phase structure,optimize the distribution of rare-earth rich(RE-rich) phases in grain boundary,and improve the corrosion resistance and mechanical properties of NdFeB magnets.When the content of Ho increases from 0 to 21.0 wt%,the weight loss of magnets decreases from 2.672 to 0.933 mg/cm^(2),and the microhardness and bending strength increase from 528.74 HV and 374.92 MPa to 633.84 HV and 459.80 MPa,respectively.