Small
·
2023
·Vol. 19
·期 16
·2206873
·
IF 13.3
Tingshi Zhang,Yanting Zheng,Xin Zhao,Mingxiong Lin,Bixia Yang,Jiawei Yan,Zanyong Zhuang,Yan Yu
Preparation of holey, single-crystal, 2D nanomaterials containing in-plane nanosized pores is very appealing for the environment and energy-related applications. Herein, an in situ topological transformation is showcased of 2D layered double hydroxides (LDHs) allows scalable synthesis of holey, single-crystal 2D transition metal oxides (TMOs) nanomesh of ultrathin thickness. As-synthesized 2D Co/NiO-2 nanomesh delivers superior photocatalytic CO 2 -syngas conversion efficiency (i.e., V CO of 32460 µmol h −1 g −1 CO and V H 2 ${V_{{{\rm{H}}_2}}}$ of 17840 µmol h −1 g −1 H 2 ), with V CO about 7.08 and 2.53 times that of NiO and 2D Co/NiO-1 nanomesh containing larger pore size, respectively. As revealed in high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), the high performance of Co/NiO-2 nanomesh primarily originates from the edge sites of nanopores, which carry more defect structures (e.g., atomic steps or vacancies) than basal plane for CO 2 adsorption, and from its single-crystal structure adept at charge transport. Theoretical calculation shows the topological transformation from 2D hydroxide to holey 2D oxide can be achieved, probably since the trace Co dopant induces a lattice distortion and thus a sharp decrease of the dehydration energy of hydroxide precursor. The findings can advance the design of intriguing holey 2D materials with well-defined geometric and electronic properties.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Ning Wan,Zipeng Xing,Junyan Kuang,Zhenzi Li,Junwei Yin,Qi Zhu,Wei Zhou
In-situ oxygen vacancy-mediated C-N-S-tridoped single crystal black TiO 2 (B) nanorods are smoothly manufactured. The sample preparation is divided into two steps, first of all, a simple hydrothermal process, followed by an in-situ solid-state chemical substitution method with calcination at 500 °C. We have a number of representations of the catalyst such as crystallinity, morphological structure, etc. by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV–vis diffuse reflectance spectroscopy, respectively. This b-C-N-S-TiO 2 (B) has the advantages of Oxygen Vacancy, single crystal structure of nanorods, Ti 3+ self-doping, C-N-S-tridoped, so this sample band gap is narrow. Moreover, through the reduction of phenol and Cr(VI), we know the photocatalytic performance of the b-C-N-S-TiO 2 (B), the reduction efficiency of phenol and Cr(VI) is ∼6.1 times and ∼7 times of no doping samples, respectively, under visible light illumination. The predominant photocatalytic performances because of the synergetic action of Ti 3+ self-doping, C-N-S-tridoped, oxygen vacancy, and the 1D single crystal B phase nanostructure, favoring the separation and transportation of photogenerated charge carriers and the visible light utilization.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chunhui Wang,Haozhe Qin,Liang Cao,Dong Wang,Jiafeng Zhang,Bao Zhang,Xing Ou
Metal selenides possess tremendous potentials due to their high specific capacity for potassium storage, however the sluggish K + diffusion and polyselenide dissolution always result in inferior electrochemical performance. Herein, metal selenide (CoSe 2 ) nanorods with engineered exposed plane incorporated in reduced graphene oxide nanosheet (sc-CoSe 2 @rGO) are fabricated. In the crystalline interior, such single-crystal structure can provide unhindered path for the fast K + transfer. Besides, at the crystalline surface, the mainly exposed (011) facet with Co 2+ rich state can induce the catalytic function with enormous reaction sites, which effectively transform the polyselenide to selenide with an enhanced selenium utilization. As expected, the as-prepared sc-CoSe 2 @rGO delivers satisfied specific capacity, prominent rate property, and superior cyclic stability (a reversible capacity of 157.7 mAh g −1 at high rate of 3.0 A g −1 after 600 cycles). This single-crystalline architecture design for intrinsic K-ion diffusion and surficial optimization is pioneeringly investigated, which provides a new insight into designing and fabricating metal-ion storage materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2015
·
IF 4.762
Dai Wu,Xiaojing Bai,Hong-Rui Tian,Weiting Yang,Zewen Li,Qing Huang,Shiyu Du,Zhong-Ming Sun
Two uranyl carboxyphosphonates (H2dipy)[(UO2)3(H2O)2(H2DPTP)2]·2H2O (DPTP-U1) and (H2bbi)[(UO2)4(H2O)2(HDPTP)2] (DPTP-U2) [H6DPTP = 2,5-diphosphonoterephthalic acid, dipy = 4,4′-bipyridine, bbi = 1,1′-(1,4-butanediyl)bis(imidazole)] were synthesized under hydrothermal conditions. The carboxyphosphonate ligand was formed through the in situ oxidation of (2,5-dimethyl-1,4-phenylene)diphosphonic acid mediated by UO22+. Single-crystal X-ray diffraction analyses reveal that DPTP-U1 possesses uranyl carboxyphosphonate layers that are separated by protonated dipy cations. Whereas DPTP-U2 is in a three-dimensional framework structure with channels filled by protonated bbi cations. The computational investigations give an insight into the nature of bonding interactions between uranium(VI) and carboxyphosphonate ligand. The spectroscopic properties were also studied.
研究领域:
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jiao Wang,Feng Zheng,Mingjun Li,Donghua Jia,Xiaodong Mao,Jifang Fu,Pengfei Hu,Qiang Zhen,Yi Yu
In this paper, four NiO nano-arrays with different morphology on nickel foam were synthesized by a hydrothermal approach. It is found that the porous single crystal NiO nanoflake array (PNFA) holds superior electrochemical properties , better than the other three samples. The specific capacitance of the PNFA obtained from the cyclic voltammetry curve was 716 F g −1 and that derived from the galvanostatic charge-discharge curve was 589 F g −1 in three-electrode system. The cycling stability of the PNFA could retain as high as 92.4% after 5000 cycles. When the PNFA was assembled into a symmetric supercapacitor , the PNFA//PNFA device exhibited an energy density of 39.3 W h kg −1 (at 550 W kg −1 ) and could retain 13.2 W h kg −1 (at 11,000 W kg −1 ) in two-electrode system. Furthermore, the SEM, XRD, TEM and XPS results prove that the PNFA is a special porous single crystal structure, which combines the advantages of the cross-linked single crystal structure for facilitating electron transfer and the porous structure providing more interfaces for insertion/exit of electrolyte ions from the active material. It indicates that the PNFA is a potential electrode material for supercapacitors .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Xiaopeng Wei,Jian He,Yin Zhu,Zixiao Qin,Guoyuan Zheng,Rui Zhang,Shuyi Mo,Jilin Wang,Disheng Yao,Bencai Lin,Nan Tian,Bing Zhou,Fei Long
Organic metal halides (OMHs) have attracted considerable attention in the field of materials science because of their low cost, easy structure adjustment, and excellent optoelectronic properties. In this study, we synthesized a new organic manganese halide single-crystal, viz. (C 6 H 9 N 2 ) 2 MnI 4 . The single crystal belongs to the triclinic crystal system with a centrosymmetric P-1 space group. The optical bandgap (2.21 eV) of yellow (C 6 H 9 N 2 ) 2 MnI 4 is close to the narrow bandgap and has a wide excitation range, with an optimal excitation wavelength of 468 nm. Among reported tetrahedrally coordinated manganese-based OMHs luminescent materials , yellow-green fluorescence emission is rare. (C 6 H 9 N 2 ) 2 MnI 4 also has a high fluorescence quantum efficiency of 67% and a fluorescence lifetime of 44 μs, and can be used to fabricate a light-emitting diode (LED) device with a luminous efficiency of 9.61 lm/W, thus expanding the applications of organic manganese halide materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Small Structures
·
2024
·
IF 13.9
Lizhong He,Lei Zhang,Jinglun Yang,Fangyuan Kang,Xiang Wang,Qianfeng Gu,Dong-Sheng Li,Lang Jiang,Qichun Zhang
Design and realization of covalent organic polymers (COPs) with precise structure are challenging yet interesting. Herein, light-yellow single crystals of a novel 1D COP (named as CityU-32 ) containing the dative nitrogen→boron bonds through the assembly between trigonal-planar boronic esters (derived from catechol and benzene-1,3,5-triyltriboronic acid) and 2,6-di(pyridine-4-yl)naphthalene are prepared. The single-crystal X-ray diffraction analysis shows that CityU-32 features a novel chain-like zigzag structure with a multichain stacking feature, where the adjacent chains are stacked together and interlocked each other with a double hydrogen bonding interaction formed from the boronic ester units. Additionally, CityU-32 has been demonstrated to show some potential applications in the field of hydrogen peroxide (H 2 O 2 ) production.
研究领域:
材料科学
·
化学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Jianai Chen,Sijie Tan,Yue Yu,Shitong Zhang,Weijun Li,Qingbao Song,Yujie Dong,Cheng Zhang,Wai-Yeung Wong
A coplanar donor-acceptor (D-A) structure in single crystal is directly observed for TICT-Type DPA-PYZ, which corresponds to a coplanar localized excited (LE) state. The conversion between coplanar LE and twisted intramolecular charge transfer (TICT) excited state in the solid state can be achieved through the change of the D-A twist angle between ~0° and ~30° during grinding, heating and solvent fumigation processes. This twist angle change between donor and acceptor was proved by the Raman, FT-IR spectroscopy and X-ray crystallographic analysis as well as theoretical calculation. This research provides the clear evidence for the conversion between coplanar LE and TICT excited states of D-A molecules in solid state and contributes much to the deep understanding of stimulus-response behavior of fluorescent D-A molecular solids from the viewpoint of excited state control.
研究领域:
化学
·
材料科学
·
光物理学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 20
·3667-3673
·
IF 3.849
Xinyuan Zhang,Xingxing Jiang,Pengxiang Liu,Yin Li,Heng Tu,Zheshuai Lin,Degang Xu,Guochun Zhang,Yicheng Wu,Jianquan Yao
A series of 3-phenyl-5-isoxazolone and 3-methyl-5-isoxazolone-based compounds with different electron donors were synthesized. Fourteen single crystals in this family were obtained by slow evaporation. Single crystal X-ray studies showed that four new 3-phenyl-5-isoxazolone-based crystals, C20H18N2O2 (PDI), C15H11NO2S (PTI), C23H15NO2 (PFI), and C17H13NO2S (PMI-(I)), belong to the noncentrosymmertric space group. The inclinations to achieve noncentrosymmetric space groups in the 3-phenyl-5-isoxazolone-based crystals have been confirmed by first-principles calculations. Powder second harmonic generation (SHG) tests revealed that the abovementioned four acentric crystals exhibited very large SHG intensities that were about 1 to 3 times that of OH1 (a commonly used nonlinear optical crystal) under 2.09 μm light. Their UV-vis absorption, diffuse reflectance spectroscopy, and thermal properties were also characterized. Moreover, widely tunable and monochromatic terahertz difference frequency generation in the 3-phenyl-5-isoxazolone-based crystal C17H13NO3 (MLS) was realized for the first time.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2015
·
IF 1.897
Xinyuan Zhang,Xingxing Jiang,Yin Li,Zheshuai Lin,Guochun Zhang,Yicheng Wu
Four phenyl-substituted quinolinium salts with different counter anions, C 27 H 27 NO 4 S, C 26 H 25 NO 5 S, C 25 H 22 NO 5 SCl, and C 25 H 22 NO 5 SBr, were synthesized and their single crystals were successfully grown from methanol solution by slow evaporation. Single crystal X-ray diffraction analyses showed that C 27 H 27 NO 4 S crystal belongs to the noncentrosymmetric orthorhombic space group P na2 1 , and the other three crystals belong to centrosymmetric monoclinic space group P 2 1 /n. Their first order hyperpolarization and macroscopic nonlinearity were analyzed and physical properties were characterized by UV–vis absorption spectroscopy, and differential scanning calorimetric and thermal gravimetric analysis.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2017
·
IF 3.399
Renren Fang,Ru Chen,Jianhua Gao,Huarong Zhang,Hongzhuo Wu,Hongxiang Li
To explore how the different intermolecular non-covalent interactions synergistically affect the molecular packing and properties when they existed at the same molecules. A series of new pyrene derivatives with chalcogen atoms as bridges were designed and synthesized. The single crystal structures of the compounds revealed the significant effect of different intermolecular non-covalent interactions on the molecular packing. The thin film transistor devices were fabricated and exhibit high mobility over 0.04 cm 2 V −1 s −1 . The distinct difference of the OFETs performance suggests that the intermolecular non-covalent interactions have very important effect on gearing the molecular packing and properties.
研究领域:
材料化学
·
有机电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2016
·
IF 2.265
Yimin Wu,Ilia Korolkov,Xvsheng Qiao,Xianghua Zhang,Jun Wan,Xianping Fan
A rapid injection approach is used to synthesize the copper selenide nanoparticles and two-dimensional single crystal nanoplates . This technique excludes the use of toxic or expensive materials, increasing the availability of two-dimensional binary chalcogenide semiconductors. The structure of the nanocrystals has been studied and the possible formation mechanism of the nanoplates has been proposed. The optical absorption showed that the nanoplates demonstrated wide and tuneable absorption band in the visible and near infrared region . These nanoplates could be interesting for converting solar energy and for nanophotonic devices operating in the near infrared .
研究领域:
材料科学
·
纳米科技
·
半导体材料
·
光电子学
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）