CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Yujiang Gou,Xinglan Fu,Long Huang,Jian Zhang,Chongshan Yang,Changbo Song,Shixiang Ma,Chunjiang Zhao,Guanglin Li
AuAgNCs-NFM is used for the efficient enrichment of HMs in soil. • The detection sensitivity and accuracy for Cs, Sr, and Co are enhanced. • The LODs for Cs, Sr, and Co reach 0.078, 0.085, and 0.16 mg/kg, respectively. • The 1D-CNN model is developed to improve predictive performance. Rapid, sensitive, and accurate detection of heavy metals (HMs) in soil is of importance for ensuring food security and advancing smart agriculture. However, conventional detection methods face numerous limitations, such as complicated operations and time-consuming procedures. This study proposed a novel method using AuAg nanoclusters (AuAgNCs)-modified nanofibrous membranes combined with double-pulse LIBS (DP-LIBS) for the sensitive detection of available cesium (Cs), strontium (Sr), and cobalt (Co) in soil. The AuAgNCs-modified nanofiber membranes were utilized to efficiently adsorb Cs + , Sr 2+ , and Co 2+ from soil solution, with simultaneous DP-LIBS detection. The results revealed that the limits of detection (LODs) for Cs, Sr, and Co in soil reached 0.078 mg/kg, 0.085 mg/kg, and 0.16 mg/kg, respectively. Furthermore, a one-dimensional convolutional neural network (1D-CNN) model was developed for accurate quantitative analysis and exhibited excellent predictive performance. The residual predictive deviations (RPDs) for Cs, Sr, and Co in soil were 6.0121, 5.1844, and 6.7082, respectively. This method holds great application potential in HMs monitoring, soil risk assessment, and human health protection. Download: Download high-res image (322KB) Download: Download full-size image
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Zichen Zhuang,Xiaoyu Zhang,Ting Chen,Zuzhi Huang,Guozhu Zheng,Baoshui Wu,Guangjun Zhang,Xiaofeng Ye,Lang Xu,Shaorong Wang
Co/Sr-based perovskite oxides are extensively utilized as cathodes for both solid oxide fuel cells (SOFCs) and protonic ceramic fuel cells (PCFCs), mainly because of their excellent oxygen reduction reaction (ORR) activity and superior electrical conductivity. However, the high cost and intrinsically unstable nature of Co, coupled with Sr segregation tendency, severely degrade the long-term durability of these cathode materials. In this study, a Co/Sr-free perovskite oxide, Ba 0.95 La 0.05 Fe 0.95 Zr 0.05 O 3-δ (BLFZ), was designed and synthesized via rational doping of 5% high-valent Zr 4+ cation at the B-site of Ba 0.95 La 0.05 FeO 3-δ (BLF) as a bifunctional mixed-conducting cathode material. Systematic measurements coupled with density functional theory (DFT) calculations revealed that Zr incorporation effectively enhances the hydration capacity, CO 2 tolerance, oxygen-vacancy concentration, and ORR activity. As a result, excellent electrochemical performance was obtained with BLFZ-based composite cathodes on microtubular PCFCs and SOFCs, achieving peak power densities of 968 mW cm −2 at 700°C and 877 mW cm −2 at 800°C, respectively. The cells also showed favorable long-term stability for over 200 h. Collectively, these results highlight BLFZ as a robust and versatile cathode candidate for dual application in PCFCs and SOFCs.
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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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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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SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
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IF 5.107
Sharafat Ali,Izaz Ali Shah,Haiou Huang
The need for high-performance and novel technologies for selective treatment of radionuclides in water has recently stimulated broad research. In this study, we examined the ability of carbon nanotube (CNT) membranes in selective removal of strontium (Sr 2+ ) and cesium (Cs + ) from water and wastewater. In single-metal systems that contained only Sr 2+ , Cs + or their competitive metal ions, the distribution coefficients ( K d ) of functionalized CNT membranes for divalent cations, i.e., Sr 2+ , Ca 2+ , and Mg 2+ , were measured as 4.41 mmol g −1 , 2.14 mmol g −1 , and 1.30 mmol g −1 , respectively, and those for monovalent cations, i.e., Cs + , K + and Na + , were 0.81 mmol g −1 , 0.79 mmol g −1 , and 0.81 mmol g −1 , respectively. When Cs + or Sr 2+ co-existed with a competing cation, both pristine and functionalized CNT membranes showed excellent selectivity to Sr 2+ over Mg 2+ and Ca 2+ while their selectivity to Cs + over K + and Na + diminished. Moreover, the CNT membranes remained their selectivity for Sr 2+ in a wastewater effluent despite the complex water composition. Overall, the selectivity sequence of the CNT membranes for divalent cations support the occurrence of inner-sphere complexation on CNT surfaces, while that for the monovalent cations was probably determined by electrostatic interactions. This study demonstrates that Ar/O 2 plasma treatment is a greener technology for the production of CNT functionalized membranes for selective removal of contaminants from water to achieve “fit-for-purpose” treatment.
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TALANTA
·
2023
·
IF 6.1
Xiao Tian,Lei Zhao
Concentrations of trace elements in coal and coal combustion products are commonly analyzed by inductively coupled plasma-mass spectrometry (ICP-MS) due to large number of elements detected and the relatively the low detection limits of this technique. Like other geological samples, complete dissolution of coal and coal combustion products is also essential for accurate ICP-MS results. In this study, Sr and Ba in coal and coal combustion products (fly and bottom ashes) from two coal-combustion power plants from North China analyzed by XRF and ICP-MS were comparatively studied. The concentrations of Sr and Ba analyzed by ICP-MS, when a mixture of acids (2 ml HF + 5 ml HNO 3 for each 50 mg coal sample and 5 ml HF + 2 ml HNO 3 for each 50 mg ash sample) was used for microwave-assisted digestion, do not fit well with the their relative XRF results. This is most probably due to the formation of the fluorides during microwave digestion, and this assumption is supported by the presence of various fluoride compounds, NaMgAl(F, OH) 6 ·H 2 O, NH 4 MgAlF 6 , AlF 3 , and K 2 SiF 6 , in the residues of all the coal and ash samples in our sequential extraction experiment. Cations of Sr and Ba were probably trapped into the divalent cation sites of the fluorides. Concentrations of Sr and Ba analyzed by ICP-MS using increased HF and HF/HNO 3 ratio (7 ml HF and 2 ml HNO 3 for each 50 mg coal/ash sample) are in better agreement with the XRF results. Our results indicate that excess amount of HF probably has led to the suppression of these elements due to fluoride precipitation. The results indicate that the modified digestion method is capable of achieving complete digestion of coal samples and results in a reliable analysis of Sr and Ba concentrations in coal samples and most fly ashes by ICP-MS. However, the formation of insoluble fluorides is probably not completely suppressed for some bottom ash samples, which can result in underestimation of Sr and Ba concentrations. Nevertheless, XRF analysis can serve as a reliable cross-check method to assist in the evaluation of the accuracy of ICP-MS results.
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CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Pengju Xia,Yifeng Lei,Wanyuan Li,Kaiting Wu,Chengyu Ni,Man Xu,Wubin Dai
With the growing public awareness of protecting vision and prevention of hazardous effects, there is much-needed research on a “healthy” full visible spectrum under near-ultraviolet (nUV) excitation in phosphor-converted white light-emitting diodes (pc-wLEDs) to fill the “cyan gap” and avoid employing a blue LED chip. Herein, a novel series of borosilicates Ba2CaB2Si4O14 (BCBS): Ce3+/Tb3+/Sm3+/Sr2+/Na+ phosphors, presenting color-tunable photoluminescence (PL), high quantum yield (QY), and thermal stability, were designed and synthesized via a facile solid-phase reaction. The Rietveld analyses, density functional theory (DFT) simulations, and theoretical calculations of bond energy together imply the site occupations of Ce/Tb/Sm on Ba2+/Ca2+ sites with a preferred location on Ca2+ over the Ba2+ site. The broad/bright cyan-PL from BCBS: Ce under nUV excitation is associated with the allowed f–d transitions of Ce3+ and dual-site occupancies. The forbidden f–f transitions of both the green-PL of Tb and the red-PL of Sm were insensitive to the site environment and helpful to PL color regulation. The cascading Ce → Tb → Sm energy transfer is confirmed, where Tb is regarded as an energy transfer (ET) bridge to avoid the metal–metal charge transfer (MMCT) effect. The introduction of Na+ as both flux and charge compensator is for the sake of decreasing defects from heterovalent substitutions and regulating morphology. Further incorporation of Sr2+ is to modulate the lattice environments of dopants for controlling the shift of PL. Finally, as a proof-of-concept implement, a pc-wLED assembled by BCBS: Ce/Tb/Sm/Sr/Na and an nUV LED chip via a remote “capping” packaging strategy show attractive performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Ze Wei,Xueqing Xiong,Xiyong Chen,Juntao Pan,Donglin Cai,Xiaomei Huang,Gang Han,Yihui Liu,Zezuo Jiang,Toyohisa Fujita
The effects of Sr doping on the crystal structures, thermal expansion behaviors, defect chemistries , electrical and electrochemical properties of the perovskite materials, La 0.5 Gd 0.5 Ba 1− x Sr x Co 2 O 5+ δ (LGBCOSr- x, x =0–0.5), were systematically analyzed and discussed. The X-ray diffraction (XRD) investigation revealed that LGBCOSr- x undergoes a phase transformation from tetragonal ( x =0.1) to cubic ( x =0.5), and the materials exhibit good thermochemical compatibility with Ce 0.9 Gd 0.1 O 1.95 (GDC) under 1100 °C. Partial replacement of Ba with Sr is found helpful in decreasing the thermal expansivity of LGBCOSr- x and increasing the ability of oxygen vacancy formation in the materials. The latter could be attributed to the enhancement in the overall electrical conductivity and oxygen transport process in terms of low cathodic polarization resistance in LGBCOSr- x materials with high Sr doping content. Further analysis on the AC impedance spectroscopy assisted with the DRT (distribution of relaxation times) methodology suggested that the charge transfer sub-process is a predominant step in the oxygen transport processes across the LGBCOSr- x materials. These findings indicate that La 0.5 Gd 0.5 Ba 1− x Sr x Co 2 O 5+ δ is a promising cathode material for intermediate temperature solid oxide fuel cells.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-23
·
IF 12.6
Zuo Kangqing,Li Aonan,Si Taoning,Lei Weiyi,Liu Yusheng,Zhang Linbo,Zhang Taixing,Xiao Guiyong,Lu Yupeng,Li Ningbo
Phosphate conversion coatings on metallic implants can synergistically integrate functional components and structural regulation, offering excellent biocompatibility and osteogenic activity. However, the passive oxide layer on the titanium (Ti) surface impedes the following chemical reactivity, adversely affecting the microstructure and properties of phosphate coatings. This study proposes a strategy for achieving structural optimization and properties enhancement of strontium-zinc phosphate (SrZnP) conversion coatings on Ti via regulating interface chemical reaction between coatings and Ti substrates. The results indicated that Sr 2+ and Zn 2+ ions-preloading (IPL) treatment enhanced the interfacial reactivity, which can further achieve crystal refinement and uniform crystal size in nucleation. In contrast, microstructural modifications on Ti substrates induced by acid etching, sandblasting, and alkali etching had minimal effects on the phase composition and crystal morphology (irregular cubic) of the SrZnP coatings. The coatings on IPL-Ti exhibited better mechanical properties and corrosion resistance. Besides, the coatings with optimized structures and surface characteristics elicited bacterial growth inhibition rates of 91.09% and 84.04% against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ), respectively. Meanwhile, the crystal-refined coatings further significantly enhanced the adhesion, proliferation, and differentiation of bone marrow mesenchymal stem cells (BMSCs), proving anticipated osteogenic activity. Overall, the ions preloading strategy on variable micro/nanostructured Ti substrates facilitates the potential application of Sr/Zn-phosphate conversion coatings for repairing infected bone defects.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Zhihao Wang,Mengxiao Zhang,Jiao He,Yongan Tang,Tingchao He,Qiang Sun,Dianyuan Fan,Yu Wang
The development of emitting materials that present both photoluminescence (PL) and X-ray excited optical luminescence has recently been attracting rising research interest for visualization applications. We introduced in this study the hydrothermally crystallized (Sr 1- x Mn x ) 5 (PO 4 ) 3 F 1- y Cl y ( x = 0–0.05, y = 0–0.40) nanorods with favorable PL and X-ray excited optical luminescence properties after composition modulating. The effects of solution pH and Cl − incorporation on structure and morphology of the products were firstly unveiled. (Sr 1- x Mn x ) 5 (PO 4 ) 3 F gives green emission at ∼548 nm ( 4 T 1 ( 4 G) → 6 A 1 ( 6 S)) under either 402 nm excitation or X-ray irradiation, and the optimal PL and X-ray excited optical luminescence were observed at x = 0.03. The replacement of F − by larger Cl − led to the generation of an amount of Frenkel defects (the dislocated F − and anion vacancies V F . ) along the c -axis, benefit from which the (Sr 0.97 Mn 0.03 ) 5 (PO 4 ) 3 F 1- y Cl y samples present enhanced PL and X-ray excited optical luminescence intensities by factors of 1.6 and 7.4, respectively, and the corresponding optimal y values are determined to be 0.20 and 0.30. Fluorescence decay analysis found steadily shortened fluorescent lifetime for Mn 2+ at higher Mn 2+ and Cl − concentrations, and the underlying mechanism was discussed. The (Sr,Mn) 5 (PO 4 ) 3 (F,Cl) apatite material, with enhanced PL and X-ray excited optical luminescence, may find novel applications for both lighting and scintillating.
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TALANTA
·
2022
·
IF 6.556
Heng Yan,Xuemei Liu,Fan Zhang,Kaiqiang Ma,Xuepeng Shao,Fengcheng Wu,Jun Han,Wenting Bu,Chuting Yang,Liangbin Li,Sheng Hu
U, Sr, Pb, Nd, and Hf isotope ratios can provide basic and important information of nuclear materials. We established a simple and efficient column chemistry method using nano-NaBiO 3, as both oxidizer and adsorbent, to completely separate Ce from rare earth elements (REEs). This new method exhibited a high decontamination (Ce/Nd < 10 −5 ) ability and was easy to conducted, thereby providing clear advantages compared to traditional liquid–liquid and solid phase micro-extraction techniques. Additionally, a rapid four-column separation procedure, based on Sr, TUR, Ln resins and nano-NaBiO 3 , was developed to isolate U, Sr, Pb, Nd, and Hf in ore samples. The entire procedure could be completed in 4–5 hrs. The robustness of the proposed method was demonstrated by analyzing the 235 U/ 238 U, 87 Sr/ 86 Sr, 206 Pb/ 204 Pb, 207 Pb/ 204 Pb, 208 Pb/ 204 Pb, 142 Nd/ 144 Nd, 143 Nd/ 144 Nd, and 176 Hf/ 177 Hf isotopic ratios of two certified reference materials (CRMs). The analytical results obtained using this method showed good agreement with previously published data. The feasibility of this method was extended to the determination of isotope ratios in uranium ores . The results obtained from the two samples with different regions indicated that they have different isotopic ratios information. These findings indicate the potential for the use of this new method in nuclear forensic science.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jianwei Dao,Zihao Han,Zhihao Jiang,Tiqun Wei,Junlin Xue,Bin Wang,Sicheng Yi,Liang Yang
Narrow-band red phosphors excited by near-ultraviolet light (n-UV) are significant for enhancing the R9 index and can produce high color rendering white LEDs. A range of KSr 1-x-y Ca y PO 4 :xEu 3+ red phosphors were synthesized by high-temperature solid-state reaction method. We investigated the effects of partially substituting Sr 2+ ions with Ca 2+ ions on the phosphors' crystal structure, photoluminescence and thermal stability. Significantly, incorporating Ca 2+ ions enhances the luminescent properties and thermal stability. Under n-UV light excitation, all samples exhibit red emission around 614 nm, corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ ions. At the doping concentration of Eu 3+ ions (x = 0.08), an optimal KSr 0.52 Ca 0.4 PO 4 :0.08Eu 3+ (y = 0.4) sample was obtained. The excitation wavelength exhibited a slight violet shift from 398 nm to 396 nm. At 150 °C, the luminescence intensity of KSr 0.92 PO 4 :0.08Eu 3+ remains 80.1 % of its value at room temperature, while that of KSr 0.52 Ca 0.4 PO 4 :0.08Eu 3+ reaches 89.7 %. White LED device can be fabricated by combining the as-prepared KSr 0.52 Ca 0.4 PO 4 :0.08Eu 3+ red phosphor with commercial BaMgAl 10 O 17 :Eu 2+ blue and (Ba, Sr) 2 SiO 4 :Eu 2+ green phosphors, along with encapsulation using n-UV LED chip (395–400 nm). The device emits bright white light and exhibits a high color rendering index (Ra = 87.6, R9 = 89.8) and suitable correlated color temperature (CCT = 5523 K) at 300 mA drive current. The results demonstrate that this work provides new application prospects for the fabrication of high color rendering white LEDs using n-UV light.
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