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| 1 | Controlling disorder in host lattice by hetero-valence ion doping to manipulate luminescence in spinel solid solution phosphors显示文摘Phosphor materials have been rapidly developed in the past decades. Developing phosphors with desired properties including strong luminescence intensity and long lifetime has attracted widespread attention. Herein, we show that hetero-valence ion doping can serve as a potent strategy to manipulate luminescence in persistent phosphors by controlling disorder in the host lattice. Specifically, spinel phosphor Zn(Ga_(1-x)Zn_x)(Ga_(1-x)Ge_x)O_4:Cr is developed by doping ZnGa_2O_4:Cr with tetravalent Ge^(^(4+)).Compared to the original ZnGa_2O_4:Cr, the doped Zn(Ga_(1-x)Zn_x)(Ga_(1-x)Ge_x)O_4:Cr possesses significantly enhanced persistent luminescence intensity and prolonged decay time. Rietveld refinements show that Ge^(4+)enters into octahedral sites to substitute Ga^(3+), which leads to the co-substitution of Ga^(3+) by Zn^(2+) for charge compensation. The hetero-valence substitution of Ga^(3+) by Ge^(4+)and Zn^(2+) enriches the charged defects in Zn(Ga_(1-x)Zn_x)(Ga_(1-x)Ge_x)O_4:Cr, making it possible to trap large amounts of charge carriers within the defects during excitation. Electron paramagnetic resonance measurement further confirms that the amount of Cr^(3+) neighboring charged defects increases with Ge^(4+)doping. Thus charge carriers released from defects can readily combine with the neighboring Cr^(3+) to produce bright persistent luminescence after excitation ceases. The hetero-valence ion doping strategy can further be employed to develop many other phosphors and contributes to lighting, photocatalysis and bioimaging. | Qinqin Ma Jie Wang Wei Zheng Qian Wang Zhiheng Li Hengjiang Cong Huijun Liu Xueyuan Chen Quan Yuan | 2018 | Science China Chemistry2018，61，12： | 3 |
| 2 | Spinel-layered integrate structured nanorods with both high capacity and superior high-rate capability as cathode material for lithium-ion batteries显示文摘尖晶石阶段描述 2 O 4 成功地被嵌进单斜晶的阶段 layeredstructured 李 2 MnO 3 nanorods,和这些尖晶石分层集成结构化的 nanorods 为锂离子电池(解放) 作为阴极材料显示出两个高能力和优异高率的能力。太古的李 2 MnO 3 nanorods 被一个简单 rheological 阶段方法作为先锋用 -MnO2 nanowires 综合。尖晶石分层集成结构化的 nanorods 被灵巧的部分减小反应作为 reductant 用硬脂的酸制作。结构的描述和 integrate 的电气化学的性质组织了验证的 nanorods 描述 2 O 4 nanodomains 在太古的李 2 MnO 3 nanorods。当为解放用作阴极材料时,尖晶石分层集成结构化的李 2 MnO 3 nanorods (SL-Li 2 MnO 3) 比太古的分层结构的李 2 MnO 3 nanorods (L-Li2MnO3 ) 。当解除费用时在 20 mAommonly 存在的 i?? | Huibing He Hengjiang Cong Ya Sun Ling Zan Youxiang Zhang | 2017 | Nano Research2017，10，2： | 3 |
| 3 | Synthesis and structure of Au_(19)Ag_4(S-Adm)_(15) nanocluster:Polymorphs and optical properties显示文摘Polymorphism is a common phenomenon in nature.Here,we report one-pot wet chemical method to synthesize two polymorphs of Au_(19)Ag_(4)(S-Adm)_(15) nanocluster protected by 1-adamantanethiol(HSAdm),which adopt P-1 and P2_(1)/c space group respectively.The crystal structures of two polymorphs were determined by X-ray crystallography.Compared to the previously reported Au_(19)Ag_(4)(S-Adm)_(15)nanocluster adopting P2_(1)/n space group,polymorphs of Au_(19)Ag_(4)(S-Adm)_(15) with P-1 and P2_(1)/c space group show the different optical properties.Moreove r,Au_(19)Ag_(4)(S-Adm)_(15) with P-1 space group exhibits good thermal stability.Meanwhile,we investigated the effect of solvent and molar ratio of metal precursors on the polymorphs.This work provides an insight to polymorphs of metal nanoclusters. | Xuemei Fu Xinzhang Lin Xiuqing Ren Hengjiang Cong Chao Liu Jiahui Huang | 2021 | Chinese Chemical Letters2021，32，1： | 1 |
| 4 | Nitridation-induced metal-organic framework nanosheet for enhanced water oxidation electrocatalysis显示文摘We report the synthesis of nitridation-induced NiFe-MOF through post-synthetic functionalization of terminal ligand in NiFe-MOF nanosheet.We directly identify the key factor of amino ligand in N-NiFe-MOF for boosting the OER performance through combining single X-ray crystallographic characterization and in-situ Raman tracking,as well as ex-situ spectroscopy analysis.Density functional theory(DFT)calculations and experime ntal results indicate irreversible phase rec on structio n from amino ligand oxidation prior to OER could lead to the optimized ΔG_(-O),resulting in the remarkable OER performance with an overpotential of 258 mV to obtain the current density of 100 mA cm^(-2) in 1.0 M KOH solution.Our work will provide new strategy for rational designing advanced MOF-based OER electrocatalysts. | Na Yao Hongnan Jia Zhengyin Fan Lu Bai Wei Xie Hengjiang Cong Shengli Chen Wei Luo | 2022 | Journal of Energy Chemistry2022，31，1： | 1 |
| 5 | One-step rapid synthesis,crystal structure and 3.3 microseconds long excited-state lifetime of Pd1Ag28 nanocluster显示文摘Doping foreign atom(s)in metal nanoclusters is an effective strategy to engineer the properties and functionalities of metal nanoclusters.However,until now,to dope Pd atom into Ag nanoclusters remains a huge challenge.Here we develop a one-step rapid method to synthesize the Pd-doped Ag nanocluster with high yield.The prepared Pd1Ag28 nanocluster was characterized by mass spectroscopy,X-ray photoelectron spectroscopy,X-ray crystallography,fluorescence spectroscopy,ultraviolet-visible absorption spectroscopy and transient absorption spectroscopy.The nanocluster exhibits a perfect face-centered cubic(FCC)kernel structure with a tetrahedron-like shell.Of note,Pd1Ag28 nanocluster had an unexpectedly long excited-state lifetime of 3.3 microseconds,which is the longest excited-state lifetime for Ag-based nanoclusters S0 far.Meanwhile,the excellent near-infrared luminescence indicated the nanocluster has the potential in fluorescent bio-imaging.Besides,it was revealed that Pd1Ag28 nanocluster could be transformed into Au1Ag28 nanocluster via ion exchange reaction of AuPPhzCl with Pd1Ag28 nanocluster.This work provides an efficient synthetic protocol of alloy nanoclusters and wil contribute to study the effect of foreign atom on the properties of metal nanoclusters. | Xinzhang Lin Hengjiang Cong Keju Sun Xuemei Fu Wanchao Kang Xiuli Wang Shengye Jin Ren'an Wu Chao Liu Jiahui Huang | 2020 | Nano Research2020，13，2： | 1 |
| 6 | Multivariate MOF for optimizing atmospheric water harvesting显示文摘Atmospheric water harvesting offers a powerful and promising solution to address the problem of global freshwater scarcity.In the past decade,significant progress has been achieved in utilizing hydrolytically stable metal-organic frameworks as recyclable water-sorbent materials under low relative humidity,especially in those arid areas.Recently,Yaghi's group has employed a combined crystallographic and theoretical technique to decipher the water filling mechanism in MOF-303,where the polar organic linkers rather than the inorganic units of MOF are demonstrated as the key factor.Hence,the hydrophilic strength of the water-binding pocket in MOFs can be optimized through the approach of multivariate modulations,resulting in enhanced water harvesting properties. | Ao Ma Hengjiang Cong Hexiang Deng | 2022 | Green Energy & Environment2022，7，4： | 0 |
| 7 | Mitigation of voltage decay in Li-rich layered oxides as cathode materials for lithium-ion batteries显示文摘Lithium-rich layered oxides(LLOs)have been extensively studied as cathode materials for lithium-ion batteries(LIBs)by researchers all over the world in the past decades due to their high specific capacities and high charge-discharge voltages.However,as cathode materials LLOs have disadvantages of significant voltage and capacity decays during the charge-discharge cycling.It was shown in the past that fine-tuning of structures and compositions was critical to the performances of this kind of materials.In this report,LLOs with target composition of Li1.17Mn0.50Ni0.24Co0.09O2 were prepared by carbonate co-precipitation method with different pH values.X-ray powder diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscope(TEM),and electrochemical impedance spectroscopies(EIS)were used to investigate the structures and morphologies of the materials and to understand the improvements of their electrochemical performances.With the pH values increased from 7.5 to 8.5,the Li/Ni ratios in the compositions decreased from 5.17 to 4.64,and the initial Coulombic efficiency,cycling stability and average discharge voltages were gained impressively.Especially,the material synthesized at pH=8.5 delivered a reversible discharge capacity of 263 mAhg−1 during the first cycle,with 79.0%initial Coulombic efficiency,at the rate of 0.1 C and a superior capacity retention of 94%after 100 cycles at the rate of 1 C.Furthermore,this material exhibited an initial average discharge voltage of 3.65 V,with a voltage decay of only 0.09 V after 50 charge-discharge cycles.The improved electrochemical performances by varying the pH values in the synthesis process can be explained by the mitigation of layered-to-spinel phase transformation and the reduction of solid-electrolyte interface(SEI)resistance.We hope this work can shed some light on the alleviation of voltage and capacity decay issues of the LLOs cathode materials. | Wenhui Hu Youxiang Zhang Ling Zan Hengjiang Cong | 2020 | Nano Research2020，13，1： | 0 |
| 8 | Ni_(3)N Modified MOF Heterostructure with Tailored Electronic Structure for Efficient Overall Water Splitting显示文摘Exploring bifunctional electrocatalysts with high-efficiency and stability toward overall water splitting is desirable for sustainable energy technologies,yet challenging.Herein,we report the construction of Ni_(3)N on the surface of Ni-MOF-74 through an in-situ nitriding process.The obtained Ni-MOF-74/Ni_(3)N exhibits remarkable HER activity with an overpotential of 73 mV to deliver 10 mA cm^(-2).Theoretical calculations and experimental study demonstrate the electron transport between Ni_(3)N and Ni-MOF-74,leading to the improved H_(2)O adsorption,optimized hydrogen adsorption,and increased H_(ad)diffusion,which contributes to the enhanced HER performance.Besides,the obtained Ni-MOF-74/Ni_(3)N also possesses outstanding activity toward OER and overall water splitting. | Hongnan Jia Na Yao Juan Zhu Yujia Liu Yunhao Lao Hengjiang Cong Wei Luo | 2022 | Chinese Journal of Structural Chemistry2022，41，8： | 0 |
| 9 | Electrochemical Oxidative [4+2] Annulation of Different Styrenes toward the Synthesis of 1,2-Dihydronaphthalenes显示文摘A[4+2]annulation of two different styrenes to construct polysubstituted 1,2-dihydronaphthalenes was achieved.This transformation proceeded smoothly under electrochemical oxidative conditions without metal catalysts and external oxidants.A series of polysubstituted 1,2-dihydronaphthalenes were obtained with high regioselectivity and diastereoselectivity.Moreover,polysubstituted 1,2-dihydronaphthalenes were further transformed to polysubstituted 1,2,3,4-tetrahydronaphthalenes and polysubstituted naphthalenes,which show great potential in synthetic applications. | Kailun Liang Shengchun Wang Hengjiang Cong Lijun Lu Aiwen Lei | 2022 | CCS Chemistry2022，4，5： | 0 |
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