Journal of Materials Research and Technology-JMR&T
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2025
·
IF 6.6
Geng Tang,Hong Yang,Bingqing Zhao,Dunying Wang,Fangfang Zeng,Qibin Liu
The rapid repair of bone defects remains a challenging clinical goal, with bio-piezoelectric composites emerging as promising materials due to their ability to replicate bone’s natural composition and electrical functionality. This study developed hydroxyapatite (HA)-based composites incorporating (Ba,Ca)(Ti,Sn)O3-based piezoceramics, achieving piezoelectric coefficients of 28.7 ± 2.48 pC/N, 11.1 ± 0.57 pC/N, and 5.7 ± 0.98 pC/N at HA mass fractions of 10%, 20%, and 30%, respectively, with a porosity around 20%. The composites were synthesized with a solid-state sintering method. The phase structure, surface morphology, and ferroelectric domain configuration of the composites were characterized. Electrical properties, compressive strengthen, hydrophilicity, in vitro bioactivity, biocompatibility and osteogenic ability were assessed. X-ray diffraction (XRD) analysis confirmed that all composites consisted of perovskite structure and HA phases. Microscopic observations revealed the (Ba,Ca)(Ti,Sn)O 3 -based piezoceramics particles embedded within the HA matrix. Evenly dispersed, irregular pores were formed, and pore size decreased as the HA content increased. The composite with 20 wt.% HA exhibited dense, small wedge-shaped domains and ferroelectric orthogonal (O) phase. Importantly, these composites demonstrated favorable compressive strength, surface wettability and biocompatibility, along with enhanced bioactivity and osteogenic differentiation ability in vitro , underscoring their potential in bone tissue engineering applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Bingbing Liu,Yifei Zhang,Peidong Yang,Yanfang Huang,Yubin Xue,Hu Sun,Shuzhen Yang,Guihong Han
Zinc electrolyte crystallization sediment (ZECS) generated in the zinc hydrometallugy industry contains valuable metals of strontium (Sr), manganese (Mn), and zinc (Zn), which has economical value but poses potential detrimental to the environment. However, the extraction and recovery of Sr is extremely difficult due to the thermodynamically stable Ca and Sr sulfate cocrystallization structure in ZECS. The destruction of refractory sulfate cocrystallization structure is a prerequisite for Sr extraction, and the carbothermal reduction roasting method is demonstrated to be efficient for the phase reconstruction. In this study, a stepwise Sr, Mn, and Zn recovery process from ZECS via carbothermal reduction roasting-acid leaching-selective precipitation-multistage extraction was proposed. In the reduction roasting procedure, all the sulfates including CaSO 4 , SrSO 4 , and Ca 0.7 Sr 0.3 SO 4 are reduced to soluble sulfides. Meanwhile, most MnO 2 is converted to a low-valence Mn product (MnO) that is soluble in acid, and the reduced Zn (g) is volatilized which can be collected from the flue dust. In the acid leaching procedure, the leaching efficiencies of Sr, Ca, and Mn are as high as 97.34%, 97.44%, and 95.49% respectively, while 99.50% Si in the form of silica is enriched in the leaching residue. After that, high-purity Sr solution was obtained after selective precipitation for Mn removal and D2EHPA multistage extraction for Ca removal. 97.41% Mn in the leaching solution is precipitated by adjusting the pH value to 9.5 with NaOH solution. After four-stage extraction, 79.60% Sr and only 0.35% Ca are retained in the aqueous phase. The purified solution contains 2.88 g/L Sr, 0.052 g/L Ca, and 0.014 g/L Mn, which can be used to prepare industrial SrCO 3 product via the carbonation operation. Thermodynamic behavior and reduction roasting reconstruction mechanism of Ca and Sr sulfate cocrystallization structure in ZECS were discussed in this work. The distributions of main metal elements (Sr, Ca, Mn, and Zn) in ZECS during the carbothermal reduction roasting-acid leaching-selective precipitation-multistage extraction process were also systematically studied.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Xuhui Wang,Guojie Zhang,Huanhuan Dong,Yong Zhang
Maltitol, a natural compound, offers a potentially eco-friendly alternative to conventional auxiliary thermal stabilizers. Its auxiliary stabilization effect was studied by discoloration tests, Congo red tests, thermogravimetric analysis, and UV–visible spectroscopy. Additionally, x-ray photoelectron spectroscopy and discoloration tests were used to study the stabilizing mechanisms of maltitol. Compared to dipentaerythritol, commonly used in the PVC industry, maltitol as an auxiliary stabilizer exhibits better improvement in thermal stability. This improvement is related to its melting point, ability to complex with zinc chloride, and content of hydroxyl groups. Furthermore, the addition of maltitol in PVC not only maintains good transparency of PVC basically unchanged but also improves the mechanical properties. Maltitol, as a natural, eco-friendly, and efficient auxiliary thermal stabilizer, exhibits a promising application prospect in PVC materials.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Changran Zheng,Zhoudong Yang,Baotong Guo,Hanqing Dai,Tianhe Lu,Xi Zhu,Huimin Xu,Bobo Yang,Jun Zou,Sergey Lishik,Jiajie Fan
(Sr, Ca)AlSiN 3 :Eu 2+ (SCASN) phosphors are widely used in white LEDs due to their excellent red spectral performance. However, exposure to high temperature, high humidity, and sulfur-containing environments significantly degrades their performance and long-term stability. Herein, a rapid plasma-assisted deposition technique is employed to apply an ultrathin Si-based nanolayer onto SCASN (SCASN-Coated), enhancing its durability under such harsh conditions. Accelerated aging tests conducted at 100 °C, 100 % relative humidity (RH), and in a sulfur-containing atmosphere reveal that unmodified SCASN retains only 24.1 % of its initial luminous intensity after 1008 h, whereas the SCASN-Coated preserves approximately 41.2 % of their original brightness without compromising intrinsic luminescent properties. First-principles calculations and molecular dynamics simulations further elucidate that SCASN has a strong chemical adsorption effect on SO 2 (−3.056 eV). And the combined presence of SO 2 and H 2 O promotes the displacement of Ca 2+ ions, accelerating degradation. The protective SiO 2 nanolayer drastically reduces the SO 2 adsorption energy (−0.124 eV) and inhibits Ca 2+ ion migration. This surface protection strategy not only augments the resilience of SCASN phosphors under extreme conditions but also provides research paradigm into the degradation mechanisms, thereby offering new avenues for extending the service life of LED devices in challenging environments.
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Materials Research Express
·
2022
·Vol. 9
·期 6
·065505
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IF 2.025
Qinghong You,Xiulian Yin,Jun Wang,Chunhua Dai
A recyclable heterogeneous KF/Ca-Mg-Al-O catalyst was prepared by co-precipitation and calcination processes. The characteristics of the catalyst were investigated using FTIR, XRD, TG-DTG and SEM. Response surface methodology was utilized to obtain the best most extreme biodiesel production yield. The ideal biodiesel production conditions were: the amount of catalyst was 3 wt%; the reaction temperature was 65 °C; the alcohol oil molar ratio 9.8:1, the reaction time was 3.5 h. Under these amended conditions, the average biodiesel yield was 95.19%, which is well in close concurrence with the worth anticipated by the model. The repeatability of catalysts was studied. After using the catalyst seven times, the catalytic efficiency was only reduced by 2.7%. These results indicate that the catalyst has good catalytic efficiency and is recyclable.
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CRYSTENGCOMM
·
2022
·Vol. 24
·期 37
·6492-6497
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IF 3.756
Xinmei Wang,Lu Qi,Lei Wu,Ruixin Zhang,Maierhaba Abudoureheman,Jiarong Lv,Peng Wang,Xiaoyu Dong,Qun Jing,Zhaohui Chen
Three non-centrosymmetric (NCS) alkaline earth vanadyl(IV) phosphate hydrates, M(VO)2(PO4)2·4H2O (M = Ca, Sr, Ba) 1–3, have been successfully synthesized by a mild hydrothermal technique. The birefringence of 1–3 was calculated to be 0.093@1064 nm, 0.070@1064 nm and 0.133@1064 nm by first principles calculations, respectively. The large birefringence mainly comes from the perfect parallel arrangement of 2[V2P2O14]∞ layers and the force of hydrogen bonds, which is conducive for the enhancement of polarization anisotropy. Furthermore, we also studied other optical and thermal properties for the title compounds as well as the relationship between structures and properties. The results provide a new perspective for exploring nonlinear optical (NLO) materials with large birefringence in vanadyl phosphate hydrates.
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高影响因子
RARE METALS
·
2021
·Vol. 41
·期 2
·650-662
·
IF 4.003
Guo Hua,Li Jun,Zou Xian-Rui,Wang Hong-Shui,Kang An,Zhou Huan,Li Ming-Jun,Zhao Xiao-Yan
Abstract Development of photocatalytic materials able to profit from the whole spectrum of sun for efficient organic pollution removal and bacterial elimination is a fascinating strategy in environmental engineering. In current work, GO-TiO 2 /(Ca,Y)F 2 :Tm,Yb, a full-spectrum composite photocatalyst, was prepared via hydrothermal processing with TiO 2 /(Ca,Y)F 2 :Tm,Yb particles deposited on the surface of graphene oxide (GO). The surface properties of GO-TiO 2 /(Ca,Y)F 2 :Tm,Yb were characterized using various characterization techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Brunauer–Emmett–Teller (BET) surface area analyzer. Besides, ultraviolet–visible (UV–Vis) diffuse reflectance spectroscopy, electron spin resonance (ESR) and other methods were used to systematically explore the photocatalytic mechanism of GO enhancement of TiO 2 /(Ca,Y)F 2 :Tm,Yb. In photocatalytic degradation study, the degradation rate of methyl orange (MO) was improved by 40% when GO was added into the TiO 2 /(Ca,Y)F 2 :Tm,Yb system. In addition, the presence of GO also improves the antibacterial ability of TiO 2 /(Ca,Y)F 2 :Tm,Yb against Escherichia coli and Staphylococcus aureus . All results reveal high efficacy of GO-TiO 2 /(Ca,Y)F 2 :Tm,Yb under full spectrum light irradiation, in which (Ca,Y)F 2 :Tm,Yb and TiO 2 can improve its utilization of full spectrum sunlight, and GO can enhance adsorption ability of dye and electron–hole pair differentiation ability of TiO 2 /(Ca,Y)F 2 :Tm,Yb. Graphic abstract
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高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 39
·395703
·
IF 3.874
Zhihua Li,Xin Ding,Bing Yu,Yu Min,Bin He,Youqing Shen,Hailin Cong
Near-infrared (NIR) emission materials can be widely applied in various fields, such as food detection, imaging, treatment, electronic products. With the trend of miniaturization of equipment, smaller materials are needed. In this work, we successfully synthesized a series of M2Ga2GeO7:N3+ (M = Ca, Ba, Sr; N = Cr, Nd, Er) samples and then focused on the study of Nd3+ doped Sr2Ga2GeO7 (SGGO). A series of SGGO:xNd3+ sub-micron phosphors were prepared via a microwave-assisted sol–gel process combined with subsequent calcination at 750 ℃, and the structural information and luminescent properties were systematically studied. SGGO is a representative tetragonal crystal and belonging to the space group of P4¯21m (113). The Nd3+ ions occupy eight-coordinated Sr2+ sites in the crystal lattice. From SEM analysis, the average particle size distribution is 219.7 ± 41.4 nm. The sub-micron phosphors have rich excitation spectra ranging from 350 nm to 850 nm and can produce multiband NIR emissions of 1331, 1056, and 905 nm when excited by ultraviolet and NIR light. The maximum emission intensity was obtained by optimizing the doping ratio of Nd3+ ions. A commercial chip was then utilized to fabricate light-emitting diodes (LEDs) to verify its application potential in NIR-II mini-LEDs. Compared with blue light LEDs, the as-prepared LEDs had good imaging penetration depth and could be clearly observed under 10 mm of chicken breast coverage. The maximum imaging penetration depth can be 33 mm.
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PubMed
高影响因子
DESALINATION
·
2021
·
IF 9.501
Hengxin Xie,Jiancong Pan,Biaowen Wei,Jun Feng,Shijun Liao,Xiuhua Li,Yigang Yu
We developed a series of anti-fouling anion exchange membranes (AEMs) by in-situ interpenetration of an ionomer of N -methylimidazole ionizing poly(2,6-dimethyl-1,4-phenylene oxide) (IM-QPPO) to lateralized gradient cross-linked hydrogel of Ca-Na alginate (CA). The CA surfaces repel negative-charged organic pollutants because of their inherent hydrophilicity and electronegative property. SEM and EDX characterizations reveal that the micron-sized anti-fouling CA layers are bonded firmly with the ionomer bulk by the interpenetration. The anti-fouling AEMs have qualified basic properties of thermal stability, water uptake and swelling ratio, area resistance and permselectivity for electrodialysis (ED) processes. IM-QPPO-0.10CA with optimal interpenetrating structure exhibits the highest current efficiency (η) of 88.88% and the lowest energy consumption (EC) of 2.53 kWh kg −1 NaCl among the group, which are comparable to those of commercial AMX (η = 89.38%, EC = 2.20 kWh kg −1 NaCl). IM-QPPO-0.10CA shows the strongest anti-fouling ability, which is confirmed by the lowest ascent speed of transmembrane voltage and no irreversible membrane-structure damages during the fouling tests. Moreover, the fouled IM-QPPO-0.10CA recovers 99.60% of the origin η value with an EC increase of 0.10 kWh kg −1 NaCl after immersion in NaCl solution. The properties of IM-QPPO-0.10CA are promising for the application of anti-fouling ED AEMs.
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ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2019
·Vol. 42
·期 6
·1601-1615
·
IF 3.252
Tao Huan-yu,Ge Hui,Shi Jianghong,Liu Xiaowei,Guo Wei,Zhang Mengtao,Meng Yaobin,Li Xiao-yan
Abstract In this study, the effect of biochar (BC) derived from Litchi chinensis Sonn. and its modification, including Ca-biochar (Ca-BC) and Fe–Mn-biochar (Fe–Mn-BC), on the transportation of oestrone (E1) in water and soil was investigated. Fe–Mn-BC showed better adsorption ability than other types of biochar (BC, Ca-BC) under different conditions (humic acid, pH, ionic strength) in an aqueous environment. The maximum mass of sorbent at 298 K increased from 1.12 mg g −1 (BC) to 4.18 mg g −1 (Fe–Mn-BC). Humic acid had a greater impact on aqueous E1 adsorption on these biochars than did the pH and ionic strength. Fe–Mn-BC as a soil amendment had a great control of E1 transport in soil, and no leachate of E1 was observed in the column experiment. E1 mobility showed strong retardation in amended soil with Ca-BC ( R f = 11.2) compared with raw soil ( R f = 7.1). These results suggested that Fe–Mn-BC was more effective in controlling E1 transportation, and Fe–Mn-BC could be used as an alternative and inexpensive adsorbent to reduce E1 contaminants from water and soil. Graphic abstract
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PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 6
·2611
·
IF 4.6
Hui Ye,Yuqin Luo,Yanjie Li,Xiangyun Wang,Hongmei He,Jinhua Jiang,Jianzhong Yu,Changpeng Zhang
A simple and sensitive method for the simultaneous quantitation of prohexadione-Ca and uniconazole in the field experiment ofOryza sativaL. andCitrus reticulataBlanco was established using solid-phase extraction (SPE) with polymer anion exchange (PAX) and Florisil followed by LC-MS/MS. The method demonstrated excellent linearity (R2> 0.999 0), trueness (recoveries between 95~105%), precision (CVs between 0.8~12%), sensitivity, and repeatability (LOQ of 0.05 and 0.01 mg/kg, respectively). Residue tests were conducted in the field at 12 representative sites in China, revealing final concentrations of prohexadione-Ca and uniconazole in brown rice, rice hull, and rice straw to be below 0.05 mg/kg, while in whole citrus fruit and citrus pulp, they were below 0.01 mg/kg. These were below the maximum residue limits specified in China. The chronic dietary risks of prohexadione-Ca and uniconazole in rice crops and citrus fruits were calculated to be 0.48% and 0.91%, respectively. Our research suggests that the chronic risk associated with the daily consumption of rice crops and citrus fruit at the recommended dosage is acceptable.Keywords:Oryza sativaL.;citrus fruit;dietary intake risk assessment;plant growth regulators
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhenfei Lv,Mengke Fan,Yukun Cao,Xin Wang,Chong Lan,Qingping Wang,Chen Yang,Xiulin Shen,Xiujuan Feng
In this study, a low-cost foam ceramic was prepared by a high-temperature reconstruction method using gangue and waste electric porcelain as the main materials. The results showed that the sintering temperature, foaming agent (waste SiC slab) content and modifier Ca(OH) 2 had significant effects on the macrostructure, microstructure, crystalline phases and properties of the foam ceramics. With a sintering temperature of 1190 °C, waste SiC slab dosage of 3 % and the addition of the modifier Ca(OH) 2 , the obtained ceramics showed an earthy-yellow appearance, a compressive strength of 1.20 MPa, an apparent porosity of 64.00 %, a bulk density of 1.08 g/cm 3 , and a vertical expansion of 165 %. The increase of sintering temperature and foaming agent content improved the size of the pores. The SiO 2 protective layer of waste SiC slab was destroyed with the addition of Ca(OH) 2 , resulting in an increase in the porosity of foam ceramics by 24.9 %. Meanwhile, the introduction of calcium ions led to the fracture of Si-O bond and the reduction of liquid phase viscosity, thereby improving the uniformity of the pores. This study provides an innovative strategy and novel ideas for the value-added utilization of solid waste and the preparation of foam ceramics.
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危险品化学品经营许可证（带存储）