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Facile fabrication of integrated three-dimensional C- MoSe2/reduced graphene oxide composite with enhanced performance for sodium storage

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Nano Research 2016年第6期9卷 1618-1629页

作者： Dong Xie Wangjia Tang Yadong Wang Xinhui Xia Yu Zhong ding zhou DonghuangWang Xiuli Wang Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China School of Engineering Nanyang Polytechnic 569830 Singapore

Scrupulous design and fabrication of advanced electrode materials are vital for developing high-performance sodium ion batteries. Herein, we report a facile one-step hydrothermal strategy for construction of a C-MoSe2/rGO composite with both high porosity and large surface area. Double modification of MoSe2 nanosheets is realized in this composite by introducing a reduced graphene oxide （rGO） skeleton and outer carbon protective layer. The MoSe2 nanosheets are well wrapped by a carbon layer and also strongly anchored on the interconnected rGO network. As an anode in sodium ion batteries, the designed C-MoSe2/rGO composite delivers noticeably enhanced sodium ion storage, with a high specific capacity of 445 mAh-g-1 at 200 mA.g-1 after 350 cycles, and 228 mAh-g 1 even at 4 A.g-1; these values are much better than those of C-MoSe2 nanosheets （258 mAh.g-a at 200 mA-g-1 and 75 mAh-g-1 at 4 A.g-~）. Additionally, the sodium ion storage mechanism is investigated well using ex situ X-ray diffraction and transmission electron microscopy methods. Our proposed electrode design protocol and sodium storage mechanism may pave the way for the fabrication of other high-performance metal diselenide anodes for electrochemical energy storage.

关键词： molybdenum diselenide double modification carbon coating graphene skeleton sodium ion storage

Growth,optical dispersion and magnetic behavior of Dy^(3+) doped yttrium iron garnet crystals

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Journal of Rare Earths 2024年第6期42卷 1110-1117,I0004页

作者： Yating Fang Hui Shen Yudie Ma Shijie Liao Shuang Xia Tian Tian ding zhou Yunfeng Ma Jiayue Xu Institute of Crystal Growth School of Materials Science and EngineeringShanghai Institute of Technology National Engineering Center of Electromagnetic Radiation Control Materials School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of China

Y_(3)Fe_(5)O_(12)(YIG)crystals are highly desirable for the fabrication of mid-infrared isolators with the rapid growth of optical communications,although it is rather challenging to grow large size and high-quality single ***^(3+)doping is expected to improve the optical and magneto-optical prope ***,high quality Dy:YIG crystals and the adjustment of Dy^(3+)on the structure and optical behavior of YIG crystal remain unclear,impeding its practical ***,a series of Y_(3-x)Dy_(x)Fe_(5)O_(12)(x=0,0.5,1.0,1.5,3)solid solution crystals was grown by the flux-Bridgman method and single crystals up to 25 mm were *** the introduction of Dy^(3+),lattice parameters are gradually enlarged from 1.2379 nm(YIG)to 1.2420 nm(DyIG).Typical Dy^(3+)absorption peaks are observed around 1070,1265 and 1670 *** refractive index decreases from 2.37(500 nm)to 2.10(2500 nm)for YIG crystal,and it reduces from 2.47(500 nm)to 2.16(2500 nm)for DyIG *** optical bandgaps remain almost unchanged for Dy:YIG *** optical dispersion of the refractive indices was finely fitted by the Wemple and DiDomenico(WDD)and the Sellmeier models,*** the increase of Dy^(3+)content,the saturation magnetization(Ms)decreases significantly from 23.62 emu/g(YIG)to 5.33 emu/g(DyIG).Small coercive field is persisted for this system,endowing small external magnetic *** results provide valuable references for the manipulation of rare earths on the properties of magnetooptical crystals,which is beneficial to the design of high-performance garnet crystals for the application of optical switching and non-reciprocal related devices.

关键词： Magneto-optical crystal Yttrium iron garnet Dy^(3+)doping Crystal growth Optical dispersion Rare earths

Preliminary Studies on Thickness of Nondestructive Rice (Oryza sativa L.) Leaf Blade

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Agricultural Sciences in China 2007年第7期6卷 802-807页

作者： CHEN You-ding ZHANG Xu zhou Xin-qiao CHEN Guan-hua Rice Research Institute Guangdong Academy of Agricultural Sciences Guangzhou 510640 P.R. China

Two varieties, Yuexinzhan and Guangchao 3, were used to study leaf thickness in rice in this experiment. The thickness of the leaf blade was measured by the nondestructive leaf thickness instrument, which was modified from the thickness instrument for steel objects （John Bull, England）. The contacting area between the leaf and the probe of the instrument was 0.5 cm^2. There was no significant difference between the thickness of steel materials measured by the nondestructive rice leaf thickness instrument and the micrometer. The correlation between the thickness of the rice leaf blade measured by the nondestructive rice leaf thickness instrument and the specific leaf weight （SLW） was significant （P 〈 0.05 or P〈 0.01）. The results also showed that the rice leaf thickness was uneven and asymmetric. The thickness and SLW of flag leaf tended to increase from the base to the tip of the leaf blade. The middle part of the second and third top leaf was the thickest, but no significant difference in thickness between the basal part and the fore part was found. Drawing a line on the main vein in the top three leaves, the left part was thinner than the right part. The thickness of the lower leaves （6/0-9/0） on the main culm tended to increase with increasing positions of the leaves in the early and middle stages, but the tendency was not the same for the higher leaves （10/0 upwards）, although the higher leaves （10/0 upward） were thicker than the lower leaves （9/0 or downward）. Furthermore, different CO2 concentrations （550±30, 460 ± 30 μmol mol^-1） in the growth boxes had no effect on the thickness of rice leaf blades. It can be concluded that the measurement of rice leaf thickness using the nondestructive rice leaf thickness instrument is simple, precise, and nondestructive.

关键词： paddy rice leaf thickness nondestructive rice leaf thickness instrument

A design and application of compound multi-functional sensor in wood-based panel processing

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Journal of Forestry Research 2006年第4期17卷 319-322页

作者： XU Kai-hong zhou ding-guo Nanjing Forestry University Nanjing 210037 P. R. China Northeast Forestry University Harbin 150040 P. R.. China

A compound multi-functional sensor was designed by the study on the on-line testing technology of wood-based panels, and its properties of shape, functions, size, resistance to special environment were studied in details. The operational principles of different sensors, technical flow of manufacturing, development of software systems of special functions, and the assessments of technical specification were also be introduced. This sensor adopted many new technologies, such as the applications of piezoresistant effect and heat sensitive effect can effectively measure the pressure and temperature, digital signal processing technology was used to extract and treat signals, and resist interference, encapsulation technology was used to keep the normal run of sensor under a harsh environment. Thus, the on-line compound multi-functional temperature/pressure sensor can be applied better to supervise the production of wood-based panels. All technical specifications of the compound multi-functional sensor were tested and the results met the requirements of the equipments.

关键词： Wood-based panel processing Multi-functional sensor Piezoresistant effect Heat sensitive effect

Influence of rare earth promoters on the performance of Ni/Mg(Al)O catalysts for hydrogenation and steam reforming of toluene

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Rare Metals 2009年第6期28卷 582-589页

作者： ZHANG Yuwen CHENG Hongwei LU Xionggang ding Weizhong zhou Guozhi Shanghai Key Laboratory of Modem Metallurgy and Materials Processing School of Materials Science and Engineering Shanghai University Shanghai 200072 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

CeO2-, La2O3-, and ZrO2-promoted Ni/Mg（Al）O catalysts synthesized by hydrotalcite-type precursors have been investigated with respect to catalytic activity and carbon formation in the hydrogenation and steam reforming of toluene as a model tar compound. X-ray diffraction （XRD）, Brunauer-Emmett-Teller （BET） specific surface area and Hz-temperature programmed reduction （TPR） were used to observe the characteristics of the prepared catalysts. The carbon formation and its amount on the used catalysts were examined by transmission electron microscope （TEM）, scanning electron microscope （SEM） and thermogravimetric （TG）. The trend of catalytic activity as derived from the experimental results followed the order： Ni-Ce〉Ni-La〉Ni-Zr〉Ni. The catalyst modified with CeO2 exhibited the highest catalytic performance and had good carbon resistance in the hydrogenation and steam reforming of toluene. A toluene conversion of 96.8%, a CH4 yield of 45.2% and a CO yield of 50.4% have been achieved. The addition of promoters led to better dispersion of nickel species and higher interaction nickel-support, which were favorable for increasing the catalytic activity and effectively preventing carbon formation.

关键词： hydrogen production hydrogenation rare earth hydrotalcite

Graphene-manganese oxide hybrid porous material and its application in carbon dioxide adsorption

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Chinese Science Bulletin 2012年第23期57卷 3059-3064页

作者： zhou ding LIU Qing CHENG QianYi ZHAO YanChao CUI Yi WANG Tao HAN BaoHang National Center for Nanoscience and Technology Beijing 100190 China State Key Laboratory of Transducer Technology Chinese Academy of Sciences Shanghai 200050 China)

Graphene-Mn3O4 (GMNO) hybrid porous material is prepared by a hydrothermal method and its performance in carbon dioxide adsorption is *** the synthesis of the GMNO materials,MnO(OH)2 colloid obtained by the hydrolysis of Mn 2+ in basic solution was using as the precursor of the *** a hydrothermal reaction of the mixture of graphene oxide (GO) and MnO(OH)2,GO was reduced into graphene and the MnO(OH)2 was transformed into Mn3O4 with enhanced crystallization.X-ray diffraction,thermal gravimetric analysis,transmission electron microscopy,infrared spectra and Raman spectroscopy were taken to characterize the hybrid *** porosity and the carbon dioxide adsorption ability are measured by gas sorption analysis,in which the as-prepared GMNO hybrid materials exhibit a specific surface area ranging from 140 to 680 m2g-1 and a maximum carbon dioxide capacity of about 11 wt%.

关键词： graphene manganese oxide porous material carbon dioxide adsorption

Immobilization of microorganisms using carrageenan gels coated with chitosan and application to biodegradation of 4-chlorophenol

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Journal of Environmental Sciences 1997年第3期9卷 30-34页

作者： Wang Jianlong Li Ping Shi Hanchang Qian Yi China zhou ding Environment Simulationand Pollution Control State Key Joint Laboratory Department of Environmental EngineeringTsinghua UniversityBeijing 100084 Department of Applied Chemistry Harbin Institute of TechnologyHarbin150001China

A new cell immobilization method based on the replacement of KCl by KCl+chitosan as the gelling agent was developed. The experimental results showed that through addition of chitosan into gelling agent, the mechanical strength and the thermal stability of the carrageenan gel were greatly improved. The new immobilization method was used to entrap a chlorophenol degrading microorganism. The immobilized microbial cells were applied for chlorophenol biodegradation. The experiments demonstrated that immobilized cells exhibit a higher bioactivity in the degradation of chlorophenol than free cells.

关键词： carrageenan chitosan immobilization 4 chlorophenol biodegradation.

Modulating the optical and electrical properties of MAPbBr_(3) single crystals via voltage regulation engineering and application in memristors

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Light(Science & Applications) 2020年第1期9卷 957-967页

作者： Jun Xing Chen Zhao Yuting Zou Wenchi Kong Zhi Yu Yuwei Shan Qingfeng Dong ding zhou Weili Yu Chunlei Guo The Guo Photonics Laboratory State Key Laboratory of Applied OpticsChangchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences130033 ChangchunChina University of Chinese Academy of Sciences 100049 BeijingChina State Key Laboratory of Supramolecular Structure and Materials Jilin University130012 ChangchunChina State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences130033 ChangchunChina The Institute of Optics University of RochesterRochesterNY 14627USA

Defect density is one of the most significant characteristics of perovskite single crystals(PSCs)that determines their optical and electrical properties,but few strategies are available to tune this ***,we demonstrate that voltage regulation is an efficient method to tune defect density,as well as the optical and electrical properties of PSCs.A three-step carrier transport model of MAPbBr_(3) PSCs is proposed to explore the defect regulation mechanism and carrier transport dynamics via an applied *** and steady-state photoluminescence measurements subsequently show that the surface defect density,average carrier lifetime,and photoluminescence intensity can be efficiently tuned by the applied *** particular,when the regulation voltage is 20 V(electrical poling intensity is 0.167 Vμm^(−1)),the surface defect density of MAPbBr_(3) PSCs is reduced by 24.27%,the carrier lifetime is prolonged by 32.04%,and the PL intensity is increased by 112.96%.Furthermore,a voltage-regulated MAPbBr_(3) PSC memristor device shows an adjustable multiresistance,weak ion migration effect and greatly enhanced device *** regulation is a promising engineering technique for developing advanced perovskite optoelectronic devices.

关键词： optical electrical defect

Genome-wide identification and expression analysis of anthocyanin biosynthetic genes in Brassica juncea

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Journal of Integrative Agriculture 2020年第5期19卷 1250-1260页

作者： ZHANG Da-wei LIU Li-li zhou ding-gang LIU Xian-jun LIU Zhong-song YAN Ming-li School of Life Science Hunan University of Science and TechnologyXiangtan 411201P.R.China Hunan Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization Xiangtan 411201P.R.China College of Life Sciences Resources and Environment SciencesYichun UniversityYichun 333600P.R.China Oilseed Research Institute Hunan Agricultural UniversityChangsha 410128P.R.China

Anthocyanins confer the wide range of colors for plants and also play beneficial health roles as potentially protective factors against heart disease and cancer. Brassica juncea is cultivated as an edible oil resource and vegetable crop worldwide, thus elucidating the anthocyanin biosynthetic pathway would be helpful to improve the nutritional quality of Brassica juncea through the breeding and cultivating of high anthocyanin content varieties. Herein, 129 genes in B. juncea were identified as orthologs of 41 anthocyanin biosynthetic genes(ABGs) in Arabidopsis thaliana by comparative genomic analyses. The B. juncea ABGs have expanded by whole genome triplication and subsequent allopolyploidizatoin, but lost mainly during the whole genome triplication between B. rapa/B. nigra and A. thaliana, rather than the allopolyploidization process between B. juncea and B. rapa/B. nigra, leading to different copy numbers retention of A. thaliana homologous genes. Although the overall expansion levels ABGs were similar to the whole genome, more negative regulatory genes were retained in the anthocyanin biosynthesis regulatory system. Transcriptional analysis of B. juncea with different anthocyanin accumulation showed that BjDFR, BjTT19, BjTT8 are significantly up-regulated in plants with purple leaves as compared with green leaves. The overexpression of BjTT8 and these target genes which were involved in late anthocyanin biosynthesis and transport might account for increasing levels of anthocyanin accumulation in purple leaves. Our results could promote the understanding of the genetic mechanism of anthocyanin biosynthesis in B. juncea.

关键词： anthocyanin biosynthetic genes B.juncea comparative genomic analysis transcriptome leaf color