JOURNAL OF RARE EARTHS
·
2012
·
IF 0.901
Xiaoming PENG,Yufeng HU,Chuanwei JIN,Zhixin WANG,Chao MIAO,Zheyu LI
Viscosities were measured for the ternary systems Y(NO 3 ) 3 +La(NO 3 ) 3 +H 2 O, La(NO 3 ) 3 +Ce(NO 3 ) 3 +H 2 O, and La(NO 3 ) 3 +Nd(NO 3 ) 3 + H 2 O and their binary subsystems Y(NO 3 ) 3 +H 2 O, La(NO 3 ) 3 +H 2 O, Ce(NO 3 ) 3 +H 2 O, and Nd(NO 3 ) 3 +H 2 O at 293.15, 298.15 and 308.15 K. The results were used to test the applicability of simple equations for the viscosity of the mixed solutions. The predictions agreed well with measured values, implying that the viscosities of the examined electrolyte solutions could be related to those of their constituent binary solutions using these simple equations.
研究领域:
物理化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 37
·17544-17550
·
IF 3.591
Zhen Chen,Hao Zeng,Shujuan Han,Zhihua Yang,Shilie Pan
The chlorine barium nitrate Ba(NO3)Cl was synthesized, for the first time to the best of our knowledge, by using a mild hydrothermal method. Its structure was observed to feature an ABW-type topology (BaCl-ABW) framework, which can be considered as stacks of honeycomb-shaped sheets. Also, Ba(NO3)Cl crystals with dimensions of up to 2 × 1 × 0.5 mm3 were grown. Remarkably, Ba(NO3)Cl was found to exhibit a short UV cutoff edge (below 213 nm) and a markedly enhanced birefringence (Δn = 0.178 @ 1064 nm), about 19 times that of its parent phase BaCl2 (Δn = 0.009 @ 1064 nm). Theoretical calculations indicated that the birefringence enhancement mainly derived from the planar [NO3] triangles.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 43
·15312-15321
·
IF 6.4
Rui Rui Yang,Fangrui Cheng,Bang Lan
Trivalent rare earth Eu3+-doped luminescent materials have been used successfully for illumination and displays due to their narrow emission lines and extreme stability. Extending the excitation band to the UV, near UV and blue region via doping lanthanide ions as a sensitizer is highly desired for white LED application. However, the complex redox reaction and forward/backward energy-transfer pathway between the sensitizer ion and Eu3+ ion in the same lattice of the phosphor host limits the potential of this strategy. Herein, we present the luminescence properties of hierarchical porous composite materials with the formula Tb(C12H8N2)2(NO3)3@Ca0.9Eu0.1MoO4 and report how interfacial energy-transfer enhanced the absorption range of the Eu3+-doped material in the UV region. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images illustrated that the obtained Ca0.9Eu0.1MoO4 had a hierarchical porous structure, and the Tb(C12H8N2)2(NO3)3 was evenly filled inside the holes or the surface. The photoluminescence and decay data indicated the existence of interfacial forward energy transfer from Tb3+ → Eu3+. Furthermore, the thermal stability of the composited Tb(C12H8N2)2(NO3)3 was improved, indicating the potential of the composite materials for application in UV light-emitting diodes.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2019
·
IF 3.25
Zepeng Lv,Dong Liu,Yijie Wu,Run Zhang,Haibo Sun,Jie Dang,Liwen Hu
Tungsten, one of the refractory metals, has lots of excellent properties, making tungsten powders become a choice of raw material for many applications. This work reported a simple method (the salt-assisted hydrogen reduction of WO 3 powders) for preparing tungsten powders with desired morphologies and size. By adjusting the amount of additive (Y(NO 3 ) 3 ) and reduction temperature, metallic tungsten particles with different morphologies and size were obtained. It was found that both temperature and additive had apparent effects on the morphology and size of metallic W particles, and the large parallelepiped-shaped powders disappeared and large irregular blocky-shaped powders were degraded under the influence of additive. With the increase of temperature and amount of salt, particles became more dispersed and the size increased at higher temperatures, and the shape of particles was changed from spherical to polyhedral as well. On the contrary, the size of sub-particles became smaller as increasing amount of Y(NO 3 ) 3 at lower temperatures. Based on the results, the reaction and refining mechanisms for preparing tungsten were proposed as well.
研究领域:
材料科学
·
冶金学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Yun-Xiang Ma,Chun-Li Hu,Bing-Xuan Li,Fang Kong,Jiang-Gao Mao
A new nonlinear optical material, the first fluoride selenite nitrate PbCdF(SeO3)(NO3), was successfully synthesized by traditional solid state reactions. This compound crystallizes in the polar space group of Pca21, and its structure features a novel 2D layered structure consisting of 1D lead nitrate chains and 2D cadmium selenite layers. PbCdF(SeO3)(NO3) exhibits a phase-matchable SHG efficiency of about 2.6 times that of KDP and a wide band gap of 4.42 eV. Its laser damage threshold was measured to be 135.6 MW/cm2, which is comparative to that of the reported Li7(TeO3)3F with a short ultraviolet cutoff edge. Theoretical calculation confirmed that the synergistic effects of all the four functional units make PbCdF(SeO3)(NO3) a remarkable SHG material.
研究领域:
材料科学
·
晶体学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2017
·
IF 4.857
Yi-Gang Chen,Nan Yang,Xing-Xing Jiang,Yao Guo,Xian-Ming Zhang
The first lead tellurate–nitrate nonlinear-optical (NLO) crystal, Pb9Te2O13(OH)(NO3)3, featuring a 3D anionic diamondlike toplogical structural motif formulated as [Pb9O13]8– constructed by unique nonanuclear basket-shaped Pb@Pb8O14 clusters has been hydrothermally achieved, in which the Pb@Pb8O14 cluster shows a core–shell structure with one PbO10 polyhedron enclosed by eight PbOx (x = 3 and 4) polyhedera via edge and face sharing. The hexavalent Te in TeO5(OH) octahedra is linked to a [Pb9O13]8– cluster to form a rare [Pb9Te2O13(OH)]3+ cationic framework. The compound demonstrates a powder second-harmonic-generation (SHG) response of about 1.2 times that of KH2PO4 (KDP) as well as a wide transparency range. Calculations on the local dipole moment and SHG coefficient reveal that the net polarization is zero because of a Kleinman-forbidden point group. Further analysis shows that the SHG response results from structure-induced variations by thermal vibrations of the lattice rather than the intrinsic dipole moment, which offers another insight on the design of new NLO materials.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Shurui Xu,Guoyu Zhong,Linxin Qu,Zihao Liang,Tao Li,Yifei Yuan,Shaona Zheng,Wenbo Liao,Abdul Waqas Anjum,Xiaobo Fu,Jing Xiao
Selectively oxidizing alcohols to carbonyl compounds in an eco-friendly and sustainable way is of great importance. Instead of the noble catalytic system, we developed a novel catalytic system based on drilled carbon nanotubes (CNTs) assisted by Fe(NO3)3 that exhibits high activity for aerobic oxidation reactions. Interestingly, our studies demonstrated a direct relationship between the defects in the drilled CNTs and their activity. Catalytic evaluations revealed that the synergistic effect of drilled CNTs combined with Fe(NO3)3 resulted in unprecedented activity. The edge defects of the CNTs and electron transformation of Fe work synergistically to activate O2. Furthermore, the electronic transition from the drilled CNTs to Fe3+ confirmed the synergistic effect of the drilled CNTs/Fe(NO3)3. Thus, our studies not only demonstrate the use of drilled CNTs/Fe(NO3)3 in a sustainable catalytic system but also provide insight into the synergistic effect between these components for the universal oxidation of alcohols to carbonyl compounds.
研究领域:
化学
·
催化材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 36
·16933-16941
·
IF 5.8
Xinyu Feng,Siwen Zhang,Jiazhuo Li,Yingfang Hu,Rongyuan Ge,Yaowen Shi,Yali Yao,Bosi Yin,Tianyi Ma
Ni3(NO3)2(OH)4 has a high theoretical specific capacitance, low cost, and environmental friendliness, making it a promising electrode material. Specifically, Ni3(NO3)2(OH)4 electrodes have a larger layer spacing (c = 6.898 Å) than Ni(OH)2 electrodes since NO3− has a much larger ionic radius than OH−. The larger layer spacing stores more electrolyte ions, significantly improving the electrochemical activity of the electrodes. Additionally, the interlayer NO3− can enhance the structural stability of Ni3(NO3)2(OH)4. However, since Ni3(NO3)2(OH)4 has a higher molar mass than Ni(OH)2, it has a lower theoretical specific capacity. Consequently, Ni3(NO3)2(OH)4 has not been used in zinc-based alkaline batteries. Studies showed that doping could enhance the electrochemical performance of electrode materials. Therefore, this study used a simple solvothermal reaction to synthesize yttrium-doped Ni3(NO3)2(OH)4 (Y-Ni3(NO3)2(OH)4), assembling a Y-Ni3(NO3)2(OH)4//Zn battery for electrochemical testing. Y-Ni3(NO3)2(OH)4 served as the cathode in the battery. The analysis of Y-Ni3(NO3)2(OH)4 showed that yttrium (Y) doping increased the specific surface area and pore size of Ni3(NO3)2(OH)4 significantly. The increased specific surface area improved the active material utilization, and the abundant mesopores facilitated OH− transport, substantially enhancing the battery's specific capacity and energy density. Ultimately, the specific discharge capacity of the advanced Y-Ni3(NO3)2(OH)4//Zn battery reached 177.97 mA h g−1 at a current density of 4 A g−1, nearly doubling the capacity of the earlier Ni3(NO3)2(OH)4//Zn battery (103.59 mA h g−1).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2015
·Vol. 31
·期 5
·761-765
·
IF 0.875
Sun Weizhi,Yu Shitao,Xian Mo
To investigate the green trinitration method of aromatic compounds, with Lewis acid/ionic liquid as catalyst and HNO 3 /Ac 2 O as nitration reagent, a Lewis acid/ionic liquid/HNO 3 /Ac 2 O system was established. In various combinations of Lewis acids and ionic liquids, Bi(NO 3 ) 3 ·5H 2 O/[HMIM]ClO 4 proved to be a very efficient catalyst for the trinitration of activated aromatic compounds and reusable for 3 times. Reaction conditions for the trinitration were optimized and yields of the trinitro products were from mild to excellent. This sulfuric acid-free system has the advantages of strong trinitration ability, low environment pollution, low toxicity, low cost and high potential for industrial application.
研究领域:
有机化学
·
环境化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Shu Wu,Jingjing Guo,Yan Wang
Constructing heterojunction to achieve efficient charge separation and transfer is a significant way to enhance photocatalytic activity. Herein, a novel ternary Bi 2 O 2 CO 3 –Bi 2 O 2 (OH)NO 3 /g-C 3 N 4 (labeled as BOC-BON/CN) heterojunction photocatalyst was successfully synthesized by ion exchange reaction under hydrothermal conditions. The products were characterized by various analytical methods, including X-ray diffraction (XRD), Fourier transform-infrared spectrometer (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray spectrometer (SEM), UV–vis reflectance spectra (UV–vis DRS), photoluminescence (PL), photocurrent response and electrochemical impedance spectroscopy (EIS). Heterojunction formation mechanism and photocatalytic degradation mechanism were discussed in detail. The prepared BOC-BON/CN heterojunction exhibited excellent Rhodamine B (RhB) photodegradation rate of 0.0476 min −1 under visible light, which was 3.55 times of the pristine g-C 3 N 4 (0.0134 min −1 ). The significant increase in photodegradation rate was attributable to the heterojunction structure, which promotes the separation of photogenerated charges. Bi 2 O 2 (OH)NO 3 played an essential role as electron accelerator in the charge transfer process. The internal electric field of Bi 2 O 2 (OH)NO 3 accelerates the directed transfer of electron from g-C 3 N 4 to Bi 2 O 2 CO 3 . This work extends the study of g–C 3 N 4 –based photocatalytic systems and demonstrates Bi 2 O 2 (OH)NO 3 as a promising cocatalyst.
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
Journal of Energy Storage
·
2025
·
IF 9.8
Cheng Liu,Yi Zhang,Pengrui Zhang,Yigang Ding,Jinhe Sun
A multitude of composite phase change materials (PCM) systems have been developed, resulting in significant advancements in the efficiency of solar thermal storage systems. However, there is a paucity of inorganic-organic composite PCMs systems, and the phase change mechanism remains unclear, which significantly constrains the deployment and advancement of this category of PCMs. To address this gap in the literature, this team has developed a novel organic-inorganic composite PCM system using 30 wt% Mg(NO 3 ) 2 ·6H 2 O (MNH) and 70 wt% propanamide (POA) as raw materials. The thermal physical properties of the PCMs were initially analyzed, and the results demonstrated that the PCMs exhibited favourable latent heat and thermal cycling stability. The melting point was found to be 376.2 K, with a latent heat of melting of 131.93 J·g −1 . It was observed that the melting temperature and latent heat remained essentially unaltered after 500 cycles. Subsequently, the structure of the PCMs was analyzed using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Ultimately, the interaction between liquid MNH and POA was modeled using molecular dynamics, allowing for a deeper understanding of the phase transition mechanism. It is hypothesized that the hydrogen bonds (HBs) between the two substances affects the physical bond, and that HBs contribute to the PCMs having good stability and a high thermal decomposition temperature. The rational mechanism of this phenomenon is explained from many aspects, including structure, Hirshfeld surface and thermal analysis. It is anticipated that the discovery of this new PCMs will facilitate large-scale applications in solar energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 45
·18391-18400
·
IF 5.7
Meidan Que,Shenghui He,Lili Gao,Boyue Zhang,Yabo Wang,Jin Chen,Bo Li,Wei Huang,Peng Zhong
The dynamic nature of formamidine lead iodide quantum dots (FAPbI3 QDs) limits their practical application by causing the appearance of ionic vacancy defects on the surface of QDs, which would then allow for significant trap-assisted non-radiative recombination of charge carriers. Herein, we explore a feasible surface modification strategy for passivating vacancy defects. Different lead salts are employed in the post-treatment procedure of quantum dot films. Based on both experimental and theoretical findings, Pb(NO3)2 passivation comprises Pb2+ and FA+. On the quantum dot surface, the O atoms from NO−3 form strong chemical bonds with FA+, and the O–C⋯O–N structure, defined by a dual-anchored configuration, contributes to the establishment of a stable crystal structure by exhibiting optimal bond lengths (3.486 Å and 3.775 Å, respectively) and a higher binding energy (10.51 eV). Finally, FAPbI3 quantum dot solar cells simultaneously achieve both exceptional environmental stability and a champion photoelectric conversion efficiency of 12.11%. This work provides valuable insights into surface chemical engineering of quantum dots, paving the way for high-performing photovoltaic devices.
研究领域:
材料科学
·
光伏技术
·
化学工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）