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In situ preparation of visible-light-driven carbon quantum dots/NaBiO3 hybrid materials for the photoreduction of Cr(Ⅵ)

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Journal of Environmental Sciences 2021年第1期33卷 100-109页

作者： Yixiao Wu Chunlong Chen Shu He xuesong zhao Shaobin Huang Gongchang Zeng Yingying You Ying Cao Lishan Niu School of Environment and Energy South China University of TechnologyHigher Education Mega CenterGuangzhou 510006China Qiannan Normal University for Nationalities Duyun 558000China Physical Sciences Division Physical and Computational Sciences DirectoratePacific Northwest National LaboratoryRichlandWA 99354USA Department of Chemical Engineering University of WashingtonSeattleWA 98101USA School of Enuironment Higher Education Mega CenterHarbin Institute of TechnologyHarbin 150000China

In this study,different carbon quantum dots(CQDs)/NaBiO3 hybrid materials were synthesized as photocatalysts to effectively utilize visible light for the photocatalytic degradation of contaminants *** hybrid materials exhibit an enhanced photocatalytic reduction of hexavalent chromium(Cr(Ⅵ))in the aqueous ***-dimensional nanoparticles of CQDs were embedded within the two-dimensional NaBiO3 nanosheets by the hydrothermal *** with that of the pure NaBiO3 nanosheets,the photocatalytic performance of the hybrid catalysts was significantly high and 6 wt.%CQDs/NaBiO3 catalyst exhibited better photocatalytic *** performed the first-principles density functional theory calculations to study the interfacial properties of pure NaBiO3 nanosheets and hybrid photocatalysts,and confirmed the CQDs played an important role in the CQDs/NaBiO3 *** experimental results indicated that the enhanced reduction of Cr(Ⅵ)was probably due to the high loading of CQDs(electron acceptor)on NaBiO3,which made NaBiO3 nanomaterials to respond in visible light and significantly improved their electron-hole separation efficiency.

关键词： Carbon quantum dots/NaBiO3 Hybrid materials Visible light response Cr(Ⅵ)reduction

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湖北省储能需求规模研究及抽水蓄能布局分析

水力发电 2025年第1期51卷 1-4,87页

作者：赵雪松曹立海周力孙方剑张杰张礼维张涛国家能源集团长源电力股份有限公司湖北武汉430070 国家能源投资集团有限责任公司北京100010 水电水利规划设计总院北京100120 中国电建集团中南勘测设计研究院有限公司湖南长沙410014

湖北省地势为东、西、北三面环山,中间低平,略呈向南敞开的不完整盆地,天然具备建设抽水蓄能电站所需的地形高差和充足的水源条件。从站点资源分布来看,抽水蓄能资源站点基本位于西部、北部和东北部的大别山区,其中尤其以西部山区资源... 详细信息

湖北省地势为东、西、北三面环山,中间低平,略呈向南敞开的不完整盆地,天然具备建设抽水蓄能电站所需的地形高差和充足的水源条件。从站点资源分布来看,抽水蓄能资源站点基本位于西部、北部和东北部的大别山区,其中尤其以西部山区资源站点相对最多,中部江汉平原站点资源较少。湖北省2030年无需新增区外来电补充电量,考虑新增约760万kW储能补充电力缺口,新能源消纳率为96.2%;2035年考虑由储能设施+区外来电补充电力缺口和电量缺口,通过拟定多组方案开展模拟和经济分析,2035年储能总需求规模1991万kW,新能源消纳率可达到95%以上,年费用相对最低,经济性最好。从分区电力市场空间进一步分析,2035年鄂东储能需求规模为840万kW,鄂西储能需求规模为690万kW,鄂西北合理需求规模为461万kW。总体而言,湖北省抽水蓄能资源分布与需求一定程度上匹配,未来抽水蓄能和新型储能布局宜重点考虑鄂东、鄂西北区域。

关键词：抽水蓄能合理需求储能需求优化布局湖北省

Flexible rotation of transverse optical field for 2D self-accelerating beams with a designated trajectory

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Opto-Electronic Advances 2021年第3期4卷 45-52页

作者： Lei Zhu xuesong zhao Chen Liu Songnian Fu Yuncai Wang Yuwen Qin Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China School of Information Engineering Guangdong University of Technologyand Guangdong Provincial Key Laboratory of Photonics Information TechnologyGuangzhou 510006China

Self-accelerating beams have the unusual ability to remain diffraction-free while undergo the transverse shift during the free-space *** theoretically identify that the transverse optical field distribution of 2D self-accelerating beam is determined by the selection of the transverse Cartesian coordinates,when the caustic method is utilized for its trajectory *** on the coordinate-rotation method,we experimentally demonstrate a scheme to flexibly manipulate the rotation of transverse optical field for 2D self-accelerating beams under the condition of a designated *** this scheme,the transverse optical field can be rotated within a range of 90 degrees,especially when the trajectory of 2D self-accelerating beams needs to be maintained for free-space photonic interconnection.

关键词： self-accelerating beams optical field caustic

Abnormalcortical thickness in relapsing-remitting multiple sclerosis,correlations with cognition impairment,and effect of modified Bushenyisui decoction(补肾益髓汤)on cognitive function of multiple sclerosis

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Journal of Traditional Chinese Medicine 2021年第2期41卷 316-325页

作者： zhao xuesong YANG Tao CHENG Fang YANG Song ZHU Wanlin LI Shaowu FAN Yongping Department of Traditional Chinese Medicine Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Department of Anorectal Xiyuan HospitalChina Academy of Chinese Medical SciencesBeijing 100091China Institute of neurosurgery Institute of NeurosurgeryTiantan HospitalCapital Medical UniversityBeijing 100070China China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China

OBJECTIVE:To investigate the changes of subcortical gray matter volume and cortical thickness,andexplorethe correlations between regional abnormalities of cortical thickness and cognitive impairment and the effect of modified Bushenyisui decoction(补肾益髓汤,BSYSD)on the cognitive function of multiple sclerosis(MS).METHODS:This prospective study was approved by the institutional review board.92 subjects were recruited,including 46 relapsing-remitting multiple sclerosis(RRMS)patients and 46 healthy controls(HC).Of the 46 patients,22 patients experienced the treatment of BSYSD for half a year.A conventional three-dimensional T1-weighted sequence were acquired for all participants on a 3.0 tesla magnetic resonance *** information,detailed cognitive scales Montreal Cognitive Assessment(MoCA),symbol digit modalities test(SDMT),immediate memory,delayed recall,and long-term recognition were *** gray matter volume and cortical thickness weremeasured by *** correlations between cortical thickness which MS patients showed reduced with respect to HC and cognitive scales wereanalyzed by Pearson correlation in RRMS *** influence of modified BSYSD on MS patients'cognition was analyzed by paired T ***:MoCA,immediate memory,delayed recall,and long-term delayed recognition in RRMS were significantly decreased than those of *** matter atrophy measured by FreeSurfer showed mainly in thalamus and hippocampus of RRMS *** with HC,the cortical thickness of several regions in frontal lobe,parietal lobe,temporal lobe,hippocampal,cingulate gyrus,and fusiform gyrus of RRMS patients were decreased with significant *** regions of cortical thickness thinning related to MoCA,immediate memory,delayed recall,and long-term delayed recognition were temporal lobe and fusiform *** BSYSD could improve MoCA,SDMT,immediate memory,delayed recall,and long-term delayed recognition of MS patients,and it could promote th

关键词： multiple sclerosis,relapsing-remitting cognitive dysfunction brain cortical thickness Gray matter Bushenyisui decoction

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煤基固体废弃物制备压裂支撑剂研究进展

洁净煤技术 2023年第6期29卷 161-172页

作者：赵学松刘琦中国石油大学(北京)非常规油气科学技术研究院温室气体封存与石油开采利用北京市重点实验室北京102249

近年来我国非常规油气勘探开发取得重要进展,水力压裂技术已成为油气增产的重要措施,作为压裂技术中重要组成部分的支撑剂,其种类、参数、压裂液携带和自身运移等问题受到关注。压裂支撑剂是水力压裂过程中用于支撑裂缝使其保持张开状... 详细信息

近年来我国非常规油气勘探开发取得重要进展,水力压裂技术已成为油气增产的重要措施,作为压裂技术中重要组成部分的支撑剂,其种类、参数、压裂液携带和自身运移等问题受到关注。压裂支撑剂是水力压裂过程中用于支撑裂缝使其保持张开状态的一种重要材料,是提高非常规油气采收率的关键。但压裂支撑剂面临原材料过度开采带来的资源枯竭以及生产成本高等问题,因此,与压裂支撑剂原材料成分相契合的煤基固体废弃物为原料制备压裂支撑剂备受关注。概述了煤基固体废弃物的产生、性质及综合利用现状,重点讨论了国内外煤基固体废弃物制备压裂支撑剂的研究进展。煤矸石、粉煤灰是最常见、污染最严重的煤基固废,其化学组成以SiO_(2)和Al_(2)O_(3)为主。煤矸石、粉煤灰中残余的碳和有机物在烧结过程中逸出的CO_(2)、水蒸气以及有机质的分解可产生气孔,被液相包裹形成闭气孔,起到类似造孔剂的作用,可有效降低压裂支撑剂的视密度和体积密度,提高支撑剂的导流能力。利用煤基固体废弃物制备压裂支撑剂既可有效减少天然矿物的消耗、降低生产成本和缓解环境污染,又可获得符合行业标准的压裂支撑剂,实现了煤基固体废弃物的资源化利用。最后对煤基固体废弃物制备压裂支撑剂发展和应用趋势进行展望,未来支撑剂材料向着低成本、低密度、高强度、多功能的方向发展。

关键词：煤矸石粉煤灰支撑剂非常规油气资源化利用

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