CHEMISTRY OF MATERIALS
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2020
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IF 9.567
Yi Wei,Zhiyu Gao,Xiaohan Yun,Hang Yang,Yixin Liu,Guogang Li
Near-infrared light-emitting diodes (NIR-LEDs) are potential candidates in food composition analysis, temperature and security monitoring, biometrics, and medical applications. To realize the above objectives, the development of NIR-emitting phosphors is urgently required. Herein, a novel NIR emission is successfully achieved in Bi3+-activated XAl12O19 (X = Ba, Sr, Ca) compounds by constructing the selective site occupation of Bi3+ in Al3+ polyhedra with small coordination number. The designed phosphors exhibit broad-band NIR emission of Bi3+ from 600 to 1000 nm. Interestingly, a broad photoluminescence control from blue to red is also achieved by just changing the sintering atmosphere. The blue emission of Bi3+ should be assigned to the prior occupation in X2+ sites and the existence of oxygen vacancy. This work not only provides a novel insight to develop NIR-emitting Bi3+-activated phosphors but also helps to reveal the underlying NIR luminescence mechanism of Bi3+ in inorganic compounds.
研究领域:
材料科学
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发光材料
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固态化学
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光学材料
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无机化学
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DOI
高影响因子
ACS Applied Energy Materials
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2021
·
IF 6.024
Xianglei Liu,Tong Wang,Ke Gao,Xianguang Meng,Qiao Xu,Chao Song,Zhonghui Zhu,Hangbin Zheng,Yong Hao,Yimin Xuan
Solar thermochemical CO2 splitting to produce fuels is an effective route to reduce carbon emission. However, it is still a daunting challenge to achieve a high CO yield and good cycle stability simultaneously at a low reaction temperature. Here, Ca- and Ga-doped LaMnO3 is introduced for solar thermochemical CO2 splitting with an ultrahigh CO yield and excellent cycle stability at a moderate operation temperature. The average CO production reaches 513 μmol/g for La0.6Ca0.4Mn0.8Ga0.2O3 when operating between 1350 and 1050 °C. Such a high value sets a record among directly measured thermochemical CO production in the literature with the temperature swing limited within 300 °C. No obvious performance deterioration over eight cycles is observed due to stable structures. The high CO production of La0.6Ca0.4Mn0.8Ga0.2O3 can be attributed to the transition of the surface reaction to internal bulk diffusion induced by Ca doping and enhanced non-stoichiometry due to Ga doping. This work provides a promising alternative for solar thermochemical CO2 splitting with high fuel yield and cycle stability.
研究领域:
材料科学
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可再生能源
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催化
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无机化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 13.2
Shan Zhang,Mi Zhang,Xinye Zhou,Xuewen Li,Yangyang Ye,Zeyuan Chen,Kaining Yu,Qingyi Yang,Hui Sun,Min Li,Wenguang Liu,Xu Zhang
The composition and physical architecture of bone play vital roles in bone defect repair. Non-vascularized autografts are constrained by limited bone availability and unpredictable resorption. In this study, we synthesized artificial lamellar bone (ALB) by mimicking the physical structure of natural lamellar bone, integrating structure, properties, and function. Based on the principles of macromolecular crowding and charge shielding in regulating the hierarchical assembly of collagen, our strategy utilized the co -assembly of concentrated collagen with polyaspartic acid-Ca 2+ complexes (PAsp-Ca) to guide collagen ordered assembly and cross-linking, thereby fabricating a biomimetic organic scaffold. During assembly, abundant PAsp-Ca was embedded within the collagen, priming the dense collagen block for deep mineralization. The resulting mineralized ALB closely matched the structure, properties of natural bone and exhibited superior osteogenic performance to autograft in rat critical-sized mandibular defect models. The synergistic effect between new bone formation and material resorption persisted until ALB was completely replaced. This strategy establishes a new paradigm for enhancing the overall performance threshold of osteogenic materials.
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高影响因子
ACTA MATERIALIA
·
2022
·
IF 9.209
Qian Liu,Ke-Feng Liu,Qi-Qi Wang,Xiao-Cun Liu,Fang Yu,Jian Liu,Yuan-Yuan Su,Sheng-Qing Xia
In this report, for the first time TiNiSi-type Zintl phases with the nominal formulae of ALiSb (A = Ca, Sr, Eu, Yb) were systematically investigated on their thermoelectric properties. The results indicated that ALiSb Zintl phases possessed intrinsically low lattice thermal conductivity despite the simple structure. In combination of thorough crystallographic and theoretical investigation, rattling-like scattering behavior originating from the Li atoms was suggested. As a result, the pristine ALiSb materials featured decent zT values of 0.4–0.7 at 823 K. With the electrical and thermal transport properties further optimized by configuring the solid solutions such as Sr 0.8 Eu 0.2 LiSb, the material approached a maximum zT up to 1.2 at the same temperature. These breakthroughs are distinct from the previous knowledge that low thermal conductivity in Zintl phases is usually realized through complex crystal structures, and for compounds with simple structures such as the TiNiSi type it is common to have poor thermoelectric performance. Owing to such a rattling-like scattering behavior, now light-element containing Zintl phases can be a promising resource for thermoelectric considerations as well. The mechanism is surely interesting and worth of in-depth investigation.
研究领域:
材料科学
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热电材料
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固体化学
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晶体学
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能源材料
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 12
·3569-3576
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IF 5.934
Ran Wang,Guoan Lin,Xiaoxiang Xu
Nitrogen doping has been frequently adopted as a useful strategy to endow wide band gap semiconductors with visible light photocatalytic activities. Nevertheless, factors that may influence the effects of nitrogen doping are seldom touched. In this work, we synthesized a series of complex perovskites Sr3BNb2O9 (B = Mg, Ca and Sr) and applied nitrogen doping strategies to these compounds. Our results suggest that a wealth of important parameters such as structural distortions, cation ordering, nitrogen uptake, visible light absorption and surface hydrophilicity are all strongly correlated with cations in the B site. Accommodating large Sr cations in the B site helps to reduce structural distortions and the level of cation ordering. It is also helpful to increase nitrogen uptake, visible light absorption and surface hydrophilicity, all of which seem to be responsible for a much higher photocatalytic activity for water oxidation reactions. The strong correlations between B site cations and the aforementioned parameters open a new avenue for the design and development of efficient photocatalytic properties of these promising materials.
研究领域:
材料化学
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光催化
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无机功能材料
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能源化学
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半导体物理
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DOI
高影响因子
Journal of Materials Chemistry A
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2026
·
IF 9.2
Guoliang Liu,Xuejiao Zhao,Lihan Zhang,Xiaoqi Wang,Manling Sui,Pengfei Yan
Layered O3–NaNi1/3Fe1/3Mn1/3O2 (NMF) is a promising cathode material for commercialization of sodium-ion batteries (SIBs), but it still faces challenges due to its poor cycling stability and air instability. Herein, we demonstrate that through optimized synthesis conditions (sintering and composition), a single Ca-dopant additive can synergistically achieve bulk-doping and surface-modification effects. Microscopic characterizations reveal that a robust rock-salt structure is constructed on the non-(003) surface facets due to Ca surface enrichment, which is developed through the Ca dopant exsolution process during high-temperature sintering. Combining bulk-doping and surface-modification effects, the 3% Ca-doped NFM cathode demonstrates superb cycling stability and improved rate capability, boosting the capacity retention from 61.4% to 90.5% after 200 cycles at 2.0–4.0 V. Further microanalysis reveals that the surface Ca-enriched modification layer not only effectively suppresses the cycling-induced surface degradation but also significantly improves the air storage stability by acting as a physical barrier layer to prevent moisture degradation. This work offers a new pathway to achieve bulk and surface modifications by a simple doping strategy and reveals the dual effects of Ca-doping for enhanced performance of O3-type layered oxide cathodes.
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产品关联
DOI
高影响因子
Surfaces and Interfaces
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2025
·
IF 6.3
Hao-Kai Lou,Peng-Fei Qian,Ze-Long Bao,Zhi-Liang Liu,Cheng-Yu Liu,Yu-Long Guo,Tian-Li Wang,Chun-Hao Chang,Wen-Hao Geng,Hong-Zhang Geng
Flexible and transparent conductive films are extensively employed in window defogging, wearable physiotherapy devices, transparent electrodes, electromagnetic interference shielding, flexible displays, etc. Though silver nanowires (AgNWs) and low-dimensional carbons (e.g., CNTs) and Ti₃C₂Tₓ MXene accelerate field development, persistent challenges such as CNTs dispersion instability and AgNWs oxidation susceptibility limit practical implementation. This study designed a multilayer composite film on PET: a cross-network conductive layer of AgNWs and citric acid-modified single-walled carbon nanotubes (CA-SWCNTs), encapsulated by an aluminum-doped zinc oxide (AZO) protective layer via sol-gel method. AgNWs with high aspect ratio (average diameter 74 nm, length 53 μm) were synthesized by polyol method as the conductive backbone. CA-SWCNTs enhanced hydrophilicity and interfacial bonding, forming a stable conductive/thermal network. By suppressing oxidation and reflection, the AZO encapsulation layer increased the transmittance at 550 nm from 81.3 % to 82.1 % while maintaining a low sheet resistance of 5.4 Ω/sq. The composite films delivered an EMI shielding efficiency of 28.9 dB (8.2 GHz), achieved rapid Joule heating to 120 °C within 90 s at 7 V, demonstrated robust stability over 5500 s of cyclic operation, and exhibited environmental endurance with merely 19.9 % sheet resistance increase after 480 h air exposure as well as a 22.1 % increase after 100 cycles of tape peeling tests. This work provides an innovative strategy for multifunctional flexible transparent devices.
研究领域:
材料科学
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纳米技术
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柔性电子学
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电磁干扰屏蔽
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能量转换与热管理
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
S.J. Guo,X.K. Tian,Y.X. Xu,J. Yan,S.H. Ju,C.Y. Zhao
Thermochemical energy storage (TCES) is a promising technology to overcome solar intermittency and volatility. However, weak solar absorption, poor cyclic stability for calcium carbonates , and cost issues for metal oxides hinder the applicability of these materials for thermochemical energy storage. Herein, an advanced, affordable, and effective TCES system is proposed, and the corresponding calcium carbonate-metal oxide synergistic material is designed with improved solar absorption and cyclic stability. The optimum molar ratio is Ca:Co:Mn:Mg = 100:20:7.5:5 for the synergistic material fabricated by the modified sol–gel method, where Ca element plays the primary role in heat storage, Co element serves as the primary optical performance enhancer and secondary heat storage component, and Mn/Mg elements act as the secondary performance modifiers. The solar absorptivity is boosted to ∼ 79.3%, and the heat storage density is 1295 kJ/kg after 30 high-temperature cycles, which are 6 times and 2.2 times higher than those of commercial calcium carbonate, respectively. Homogeneous mixing of modifiers at the microscale and stable, well-developed pore structure are critical factors for cyclic stability enhancement. The change of electronic structure on the Fermi level caused by Co/Mn ion doping is the key to optical absorption improvement, and the promoting amplitude exhibits wavelength dependence. This work expands the limited list of currently available TCES materials and the comprehensive description of optical properties offers guidance for future implementation of TCES materials with high solar absorption in specific wavelengths.
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高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 22
·2200392
·
IF 29.698
Peng Zhong,Kazuaki Toyoura,Lulu Jiang,Lubing Chen,Sara Adeeba Ismail,Naoyuki Hatada,Truls Norby,Donglin Han
A significant hydration and protonic conduction in La 2 NiO 4+ δ -based Ruddlesden–Popper (RP) oxides will enable their use as positrode materials in proton ceramic electrochemical cells (PCECs). Unlike perovskite electrolytes and positrode materials, where protons reside and jump on regular oxide ions, RP oxides such as La 2 NiO 4+ δ may contain oxygen interstitials and offer the possibility that protons locate on and migrate by help of these, suggesting a mechanism by which positrodes may operate by triple conduction. Here, theoretical calculations that support proton migration between interstitial oxide ions in the rock-salt layer via unshared oxide ions in the perovskite layer are reported. Furthermore, water contents of pristine La 2 NiO 4+ δ and La 2- x A x NiO 4+ δ ( A = Ca, Sr, Ba) are reported, showing that hydration increases with the level and basicity of the dopant. Hebb-Wagner blocking electrode measurements show significant partial protonic conductivity in all samples. The effects of doping on hydration and of p H 2 O on the p-type conductivity suggest that protons reside primarily on structural oxide ion, but a role of interstitial oxide ions for dissolution and migration of protons cannot be ruled out in cases with oxygen excess. The results are instructive for further studies and optimization of RP oxides as potential positrode materials for PCECs.
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Ayesha Idrees,Ali Shan,Waqas Qamar Zaman,Ali Mohsin,Zain Abbas,Tanvir Shahzad,Atif Shakeel,Shuguang Lyu
M-metal (Ca and Cu) doped Ca-Fe 2 O 3 and Cu-Fe 2 O 3 catalysts were synthesized using solvothermal method. The Ca-Fe 2 O 3 and Cu-Fe 2 O 3 catalysts were characterized by XRD, Raman spectroscopy , SEM , TEM and XPS spectroscopy. The catalytic performance of 6%Ca-Fe 2 O 3 and 5%Cu-Fe 2 O 3 catalysts for trichloroethylene (TCE) removal were improved by M-metal doping leading to TCE removal at 99.8% in 1 h, which were three folds greater than by simple a- Fe 2 O 3 in the presence of persulfate (PS). Ca and Cu doping formed defective structure and created more oxygen vacancies thereby generating abundant active species during PS activation process. Further, the influence of catalysts’ dosage, oxidant dosage, solution pH, inorganic anions, and dissolved oxygen were evaluated. Complete removal of TCE was also obtained at weak alkaline pH condition. The greater specific surface area and the improved electrical conductivity was attributed to the huge generation of O 2 •– and 1 O 2 species which played major part in TCE removal. Scavenging tests and ESR spectroscopy confirmed the dominant role of O 2 •– and 1 O 2 in TCE degradation. The stability and viability of 6%Ca-Fe 2 O 3 and 5%Cu-Fe 2 O 3 catalysts were evaluated by repetition tests and in the presence of surfactants, TCE removal in real water matrix, and in the degradation of multi-pollutants.
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高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Shuo Yan,Yun Li,Jilin Cao
The calcium nitrate (Ca(NO 3 ) 2 ) waste generated from the production of nitrophosphate fertilizers brings about serious environment and human health issues. Using Ca(NO 3 ) 2 waste and ammonium bicarbonate (NH 4 HCO 3 ) fertilizer as raw materials, higher-value spherical calcite mesocrystals have been synthesized via precipitation method. The synthesis conditions are optimized from the aspects of dispersant, crystal control agent and reaction temperature, and the mechanism that regulates the size and morphology of calcite is illustrated. The synthesized spherical calcite mesocrystals exhibit the small particle size of ca. 5 µm and high specific surface area of 84.44 m 2 /g. Under the dispersion effect of polyvinylpyrrolidone, the adsorption of crystal control agent citric acid on the calcite particles results in the formation of the spherical mesocrystal morphology. The yield of calcite in this process could reach 94.3%. Ca 2+ ion remaining in the mother liquor are further removed in the form of CaCO 3 by addition of calcium oxide , and a mixture of ammonium nitrate and a small amount of NH 4 HCO 3 is obtained by concentrating the filtrate, which can be used as nitrogen fertilizers. This work provides a new insight into the low-cost synthesis of spherical calcite mesocrystals with the high specific surface area and the comprehensive utilization of Ca(NO 3 ) 2 waste.
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Min Li,Jiang Wang,Feiyu Liu,Xinze Song,Chunmei Su,Jinjia Liu,Shuai Wang,Jingchun Jia,Hongwei Ji,Chuncheng Chen
Fluoride contamination in groundwater and the disposal of spent adsorbents remain critical environmental challenges. Herein, a series of monolithic Ca-containing MgAl layered double hydroxide/polyacrylonitrile nanofiber membranes (Mg 2-x Ca x Al-LDH/PAN) were fabricated via electrospinning, which combine the high adsorption performance of LDH with the exceptional separability of nanofibrous matrices. Mg 1.9 Ca 0.1 Al-LDH/PAN showed 96.2% removal efficiency for 10 mg/L F - and maximum adsorption capacity of 16.7 mg/g at 25 °C in a batch reactor, and achieved a specific treatment rate of 150 L/kg/h in a fixed-bed column. The adsorption mechanisms were elucidated through combined experimental and DFT studies. More importantly, rather than following conventional regeneration routes, the spent fluoride-laden adsorbent was converted through pyrolysis into a fluorine-doped carbon-based electrode material. This upcycled material retained a high-surface-area fibrous structure and exhibited enhanced oxygen reduction reaction (ORR) activity compared to its non-fluorinated counterpart. This work presents an “adsorb-and-transform” paradigm that integrates efficient water decontamination with sustainable recovery of functional materials for energy applications. Download: Download high-res image (184KB) Download: Download full-size image
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