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Improved performance of visible-light photocatalytic H_(2)-production and Cr(Ⅵ) reduction by waste pigeon guano doped g-C_(3)N_(4) nanosheets

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Journal of Materials Science & Technology 2023年第21期152卷 37-49页

作者： Yangli ke Qingliang You Jing Ai Xiaofang Yang Qigao Shang Yanyang Liu Dongsheng Wang guiying Liao Faculty of Materials Science and Chemistry China University of GeosciencesHubei 430074China key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of EducationSchool of Optoelectronic Materials and TechnologyJianghan UniversityWuhan 430056China Hubei key Laboratory of Yangtze Catchment environmental Aquatic Science School of Environmental StudiesChina University of GeosciencesWuhan 430074China State key Laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China

In this study,waste pigeon guano(Pg)was re-utilized as an ideal biomass adulterant to improve the photocatalytic activity of the pristine graphitic carbon nitride(g-C_(3)N_(4)).Waste Pg and melamine were employed as precursors to fabricate a novel porous multielement-doped g-C_(3)N_(4)(CN-Pg-S)nanosheets photocatalyst via in situ thermal polycondensation coupled with thermal exfoliation *** CN-Pg-S owned abundant uniformly porous structures,superior conductivity,and excellent photocatalytic abilities,resulting in highly-efficient H_(2)-production(1950μmol g^(–1) h^(–1))and Cr(Ⅵ)reduction(99.1%)un-der visible light,which increased by 22.9-folds and 5.3-folds more than that of pristine g-C_(3)N_(4).The non-metallic(P,S,and O)and metallic elements in CN-Pg-S played a crucial role in expanding the visible-light absorption range and promoting the separation-migration of photogenerated electron-hole *** the uniformly porous nanosheet structure of CN-Pg-S shortens the diffusion paths of photogenerated carri-ers and exposes more active sites for photocatalytic *** study proposed an eco-friendly re-sources integration strategy of waste Pg to prepare excellent CN-Pg-S photocatalysts for highly-efficient H_(2)-production and Cr(VI)reduction.

关键词： Pigeon guano(Pg)doping g-C_(3)N_(4)nanosheets Photocatalyst H_(2)-production Cr(Ⅵ)reduction

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Sensitivity of wastewater surveillance: What is the minimum COVID-19 cases required in population for SARS-CoV-2 RNA to be detected in wastewater?

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Journal of environmental Sciences 2023年第3期125卷 851-853页

作者： Connie le Li Ka Shing Institute of Virology Department of Radiation Oncologyand Cross Cancer InstituteUniversity of AlbertaEdmontonAlberta T6G 2G3Canada

Wastewater surveillance, also referred to as wastewaterbased surveillance (WBS) and wastewater-based epidemiology(WBe), has become a powerful tool for the monitoring, control, and prevention of infectious diseases, including COVID-19. Wastewater surveillance is a complementary and unbiased approach to evaluate disease burden at a population level(Hrudey et al., 2022;Kitajima et al., 2020;Kumblathan et al.,2021;Polo et al., 2020).

关键词： wastewater Wastewater prevention

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The partial C^(0)-estimate along a general continuity path and applications

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Science China Mathematics 2021年第11期64卷 2495-2520页

作者： ke Feng Liangming Shen School of Mathematical Sciences University of Electronic Science and Technology of ChinaChengdu 611731China School of Mathematical Sciences Beihang UniversityBeijing 100191China

We establish a new partial C^(0)-estimate along a continuity path mixed with conic singularities along a simple normal crossing divisor and a positive twisted(1,1)-form on Fano *** an application,this estimate enables us to show the reductivity of the automorphism group of the limit space,which leads to a new proof of the Yau-Tian-Donaldson conjecture.

关键词： partial C0-estimate K?hler-einstein metric conic K?hler metric

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Structure of High Temperature Phase α-Ba_3Y(BO_3)_3 Crystal

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Chinese Journal of Structural Chemistry 2003年第5期22卷 550-552页

作者： PANShang-ke WANgguo-Fu StatekeyLaboratoryofStructuralChemistry FujianInstituteofResearchontheStructureofMatterTheChineseAcademyofSciencesFuzhouFujian350002China graduateSchooloftheChineseAcademyofSciences Beijing100039China

The high temperature phase a-Ba3Y(BO3)3 was synthesized by Czochralski method, and its crystal structure has been determined by single-crystal X-ray diffraction. It crystallizes in the trigonal system, space group 3R with a = 13.028(2), c = 9.4992(2) ? V = 1396.1(5) ?, Ba3YB3O9, Mr = 677.36, Z = 6, Dc = 4.834 g/cm3, l(MoKa) = 0.71073 ? m = 18.721 mm-1, F(000) = 1764, the final R = 0.0718 and wR = 0.1640 for 1199 observed reflections with I > 2s(I). In this structure two alternate nonequivalent Y atoms form one-dimensional chains bridged by the Ba atoms with BO3 triangles which link Y(1) and Y(2), respectively. The Ba atom is surrounded by nine O atoms belonging to six BO3 triangles.

关键词： synthesis crystal structure double borate

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Association of the glycemic background patterns and the diabetes management efficacy in poorly controlled type 2 diabetes

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World Journal of Diabetes 2025年第1期16卷 74-90页

作者： Ayşe N erbakan Müzeyyen Arslan Bahadır FatoşN Kaya Büşra güleç MiraçVural keskinler Ümmügülsüm AktemurÇelik Özge Faydalıel Banu Mesçi Aytekin Oğuz Department of Internal Medicine Prof Dr Suleyman Yalcin City HospitalIstanbul Medeniyet UniversityIstanbul 34722Türkiye Department of Family Medicine Istanbul Medeniyet UniversityIstanbul 34722Türkiye

BACKgROUND Inadequate glycemic control in patients with type 2 diabetes(T2DM)is a major public health problem and a significant risk factor for the progression of diabetic *** To evaluate the effects of intensive and supportive glycemic management strategies over a 12-month period in individuals with T2DM with glycated hemoglobin(HbA1c)≥10%and varying backgrounds of glycemic *** This prospective observational study investigated glycemic control in patients with poorly controlled T2DM over 12 *** were categorized into four groups based on prior glycemic history:Newly diagnosed,previously well controlled with recent worsening,previously off-target but now worsening,and HbA1c consistently above 10%.HbA1c levels were monitored quarterly,and patients received medical,educational,and dietary support as *** analysis focused on the success rates of good glycemic control and the associated factors within each *** The study showed significant improvements in HbA1c levels in all *** most significant improvement was observed in individuals newly diagnosed with diabetes:65%achieved an HbA1c target of≤7%.The results varied between participants with different glycemic control histories,followed by decreasing success rates:39%in participants with previously good glycemic control,21%in participants whose glycemic control had deteriorated compared to before,and only 10%in participants with persistently poor control,with mean HbA1c levels of 6.3%,7.7%,8.2%,and 9.7%,*** one year,65.2%of the“newly diagnosed patients”,39.3%in the“previously controlled group”,21.9%in the“previously off-target but now worsened'”group and 10%in the“poorly controlled from the start”group had achieved HbA1c levels of 7 and *** In poorly controlled diabetes,the rate at which treatment goals are achieved is associated with the glycemic background characteristics,emphasizing the need for tailored ***

关键词： Type 2 diabetes mellitus glycated hemoglobin glycemic control Patient-centered care Diabetes management glycemic background

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Precise calibration of cavity forward and reflected signals using low-level radio-frequency system

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Nuclear Science and Techniques 2022年第1期33卷 35-43页

作者： Jin-Ying Ma Feng Qiu Long-Bo Shi Zheng-Long Zhu Tian-Cai Jiang Zong-Heng Xue ke-An Jin Qi Chen Cheng-Ye Xu Xing-Hao Ding Zheng gao lie-Peng Sun gui-Rong Huang Yuan He Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

Precise measurements of the cavity forward(Vf)and reflected signals(Vr)are essential for characterizing other key parameters such as the cavity detuning and forward *** practice,it is challenging to measure V_(f) and V_(r) precisely because of cross talk between the forward and reflected channels(e.g.,coupling between the cavity reflected and forward signals in a directional coupler with limited directivity).For DeSY,a method based on the cavity differential equation was proposed to precisely calibrate the actual V_(f) and V_(r).In this study,we verified the validity and practicability of this approach for the Chinese ADS front-end demo superconducting linac(CAFe)facility at the Institute of Modern Physics and a compact energy recovery linac(ceRL)test machine at *** the CAFe facility,we successfully calibrated the actual V_(f) signal using this *** result demonstrated that the directivity of directional couplers might seriously affect the accuracy of V_(f) *** the ceRL facility,we calibrated the Lorentz force detuning(LFD)using the actual *** study confirmed that the precise calibration of V_(f) significantly improves the accuracy of the cavity LFD measurement.

关键词： Forward and reflected signals Measurement Calibration

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Amphiphilic Dendrimer-like Copolymers with High Chain Density by Living Anionic Polymerization

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Chinese Journal of Polymer Science 2019年第9期37卷 875-883页

作者： ke Zheng Jun-Po He State key Laboratory of Molecular engineering of Polymers Department of Macromolecular Science Fudan University

We report here a method for the preparation of amphiphilic dendrimer-like copolymers with dendritic polystyrene (PS) core and protonated poly(2-vinyl pyridine)(P2VP) or poly(methacrylic acid)(PMAA) shell. The method employed the efficient coupling reaction of anionic living polymer chains and chlorosilane. The synthesis started from a functionalized 3rd generation dendritic polystyrene, g3PS-g-SiCl, used as the precursor. The dendrimer-like copolymer of styrene and 2-vinyl pyridine, g3PS-g-P2VP, was synthesized by direct coupling of living P2VPLi to the precursor. The dendrimer-like copolymer of styrene and Zer/-butyl methacrylate, g3PS-g-PtBMA, was synthesized by an indirect procedure in which a living polymer containing mainly PtBMA segment was attached to the precursor. Both methods resulted in the formation of dendrimer-like copolymers with the high molecular weights (up to 8.5 × 10^6 Da), large molecular sizes (diameter up to 73 nm), and dense shells (number of arms up to 1300). These products, g3PS-g-P2VP and g3PS-g- PtBMA, were protonated with trifluoroacetic acid and acidic hydrolyzed, respectively. After transformation, amphiphilic dendrimer-like copolymers, g3PS-g-P2VPH^+ and g3PS-g-PMAA, were obtained. Preliminary results on the solution properties of the amphiphilic products were presented.

关键词： Dendrimer-like polymer Living anionic polymerization Amphiphilic copolymer

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effect of Ti Additions on Mechanical and Thermodynamic Properties of W-Ti Alloys:A First-principles Study

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期 246-257页

作者：张建 NIe Wei HUANg Jin ZHU ke LIU Ruxia 张睿智 LUO guoqiang SHeN Qiang State key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Institute for Carbon Neutrality University of Science and Technology Beijing

The mechanical and thermodynamic properties of W-Ti alloys (including W15Ti1,W14Ti2,W12Ti4and W8Ti8alloys) were investigated by the first-principles approach based on density functional *** results indicate that W-Ti alloys except W8Ti8are thermodynamically *** modulus and hardness of W-Ti alloys are smaller than those of pure tungsten and gradually decrease with increasing Ti ***,their B/g ratios and Poisson's ratios exceed those of pure tungsten,suggesting that the introduction of Ti decreases the mechanical strength while enhancing the ductility of W-Ti *** thermal expansion coefficients for W-Ti alloys all surpass those of pure tungsten,indicating that the introduction of titanium exacerbates the thermal expansion behavior of W-Ti ***,elevated pressure has the capacity to suppress the thermal expansion tendencies in titanium-doped tungsten *** study offers theoretical insights for the design of nuclear materials by exploring the mechanical and thermodynamic properties of W-Ti alloys.

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Stimuli-Responsive Organic Phase Change Materials:Molecular Designs and Applications in energy Storage

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Accounts of Materials Research 2022年第6期3卷 634-643页

作者： My le grace g.D.Han Department of Chemistry Brandeis UniversityWalthamMassachusetts 02453United States

Achieving a stable latent heat storage over a wide temperature range and a long period of time as well as accomplishing a controlled heat release from conventional phase change materials have remained prominent challenges in thermal energy *** the conventional phase change materials have the fixed phase transition temperatures under the standard ambient pressure,the latent heat storage is only viable at temperatures higher than their melting and crystallization *** the latent heat is stored in the liquid phase of materials,it is imperative to maintain the temperature of the system above its crystallization point to prolong the heat *** the continuous energy input or extensive insulation,the crystallization of liquid occurs spontaneously,leading to the loss of latent heat and a short heat storage ***,there exists a critical need to develop methods that enable the control over the phase transition of materials,unrestricted by the temperature of the *** successful development of such methods and materials in recent years has been viable through the incorporation of molecular switches that respond to external stimuli,notably light,electrochemical bias,and ions,by reversible structural *** have discovered novel functional organic material systems that exhibit solid-to-liquid phase transitions controlled by optical and electrical stimulation,along with other research *** development and optimization of such materials are enabled by the judicious molecular designs and *** this Account,we will introduce the cutting-edge design principles of controllable phase change materials that have demonstrated the storage of thermal energy for up to a couple of months without crystallization over a wide temperature range,from subzero to over 100℃,which addresses the major weakness of conventional phase change *** particular,materials that are controlled by solar irradiation and compounds that exhibit sub

关键词： crystallization latent Storage

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evidence for the Lower Continental Crustal Origin of the Xihuashan granite

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Acta geologica Sinica(english edition) 1986年第3期60卷 47-64+112-114页

作者： L.le Bel g.giuliani gIS BRgM-CNRS of France

The Xihuashan granite is typically representative of the tungsten-bearing granites widespread in theNanling area of South China. It was considered in the past to have been formed by partial melting of the upper continental crust, with its source rocks most probably of the Sinian or Cambrian. However, detailed Ree analyses, studies of the Rb-Sr isotopic system and melting experiments of metasedimentary rocks all argue against this idea. Moreover, stable isotopic data also indicate a deep source origin for S, C, H and O. The authors thus propose a genetic concept of the lower continental crustal source of the Xihuashan granite, and point out further that tungsten deposits related to this kind of granite are linked in some way to deep-seated structure and concentrated along NNe-Ne- and eNe-striking major deep fault belts above the transitional zone between mantle uplift and mantle depression.

关键词： evidence for the Lower Continental Crustal Origin of the Xihuashan granite

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