JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Gang Xing,Xuan Liu,Yazhen Jia,Jialin Wu,Liming Chai,Wenjie Zhai,Zhaojun Wu,Jing Kong,Jianbin Zhang
Synthesis of catalysts with high catalytic degradation activity for formaldehyde (HCHO) at room temperature is highly desirable for indoor air quality control. Herein, a novel K-Mn 3 O 4 @CeO 2 catalyst with excellent catalytic oxidation activity toward HCHO at near room temperature was reported. In particular, the K addition in K-Mn 3 O 4 @CeO 2 considerably enhanced the oxidation activity, and importantly, 99.3 % conversion of 10 mL of a 40 mg/L HCHO solution at 30 °C for 14 h was achieved, with simultaneous strong cycling stability. Moreover, the addition of K species considerably influenced the chemical valence state of Mn from +4 ( ε -MnO 2 ) to +8/3 (Mn 3 O 4 ) on the surface of CeO 2 , which obviously changed the tunnel structure and the number of oxygen vacancies. One part of K species is uniformly dispersed on K-Mn 3 O 4 @CeO 2 , and the other part exists in the tunnel structure of Mn 3 O 4 @CeO 2 , which is mainly used to balance the negative charge of the tunnel and prevent collapse of the structure, providing enough active sites for the catalytic oxidation of HCHO. We observed a phase transition from tunneled KMnO 2 to Mn 3 O 4 to tunneled MnO 2 with the decreasing K + content, in which K-Mn 3 O 4 @CeO 2 exhibited higher HCHO oxidation activity. In addition, K-Mn 3 O 4 @CeO 2 exhibited lower oxygen vacancy formation and HCHO adsorption energies in aqueous solution based on density functional theory calculations. This is because the K species provide more active oxygen species and richer oxygen vacancies on the surface of K-Mn 3 O 4 @CeO 2 , promote the mobility of lattice oxygen and the room-temperature reduction properties of oxygen species, and enhance the ability of the catalyst to replenish the consumed oxygen species. Finally, a possible HCHO catalytic oxidation pathway on the surface of K-Mn 3 O 4 @CeO 2 catalyst is proposed.
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PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Jie Li,Huan Zhou,Jie Yang,Cunbing Xu,Sifan Wang,Yifan Li,Jiangbo Chen
The solid–liquid phase equilibria of the Li+, Na+, Ca2+//Cl––H2O quaternary system at 298.15 and 323.15 K are studied via the isothermal solubility phase equilibrium method. The solubility data and liquid properties of density and pH are obtained. The phase diagrams of the quaternary systems, including the water free diagram, the water diagram, and the dry salt diagram, are plotted to show the phase regions, water content, and salting-in effect. NaCl occupies the largest phase region at both 298.15 and 323.15 K. One double salt LiCl·CaCl2·5H2O occurs at 298.15 K and builds up two invariant points; one incommensurate invariant point saturated by (NaCl, LiCl·H2O, LiCl·CaCl2·5H2O) and one commensurate invariant point saturated by (NaCl, CaCl2·4H2O, LiCl·CaCl2·5H2O), but at 323.15 K, no double salt forms. The salting-in effect that happened in ternary systems still occurs in the quaternary Li+, Na+, Ca2+// Cl––H2O system at both temperatures. NaCl saturated concentration increases with LiCl and CaCl2 contents and results in a very high total salt content at commensurate invariant points, e.g., they are 56.92 and 60.62% at 298.15 and 323.15 K, respectively.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinyue Cao,Yu Wang,Xiangyi Wu,Jinglin Wang,Haozhen Ren,Yuanjin Zhao
Chinese herb hydrogel has outstanding values in wound treatment. Tremendous effort is dedicated to developing functional and intelligent Chinese herb hydrogels for accelerating healing process. Herein, a novel multifunctional bilayer Chinese herb hydrogel patch for wound healing is presented. The patches are composed of a Ginsenoside compound K (GCK)-integrated chitosan inverse opal scaffold layer and a Bletilla striata polysaccharide (BP) hydrogel filler layer. As the photothermal conversion capacity of BP can trigger faster degradation of its hydrogel layer under near-infrared (NIR) light, the encapsulated BP can be controllably released to wound area and exhibit photothermal antibacterial and antioxidant effects. Besides, the inverse opal scaffold layer shows great mechanical property and moisturizing performance, and its released GCK can promote angiogenesis for long term therapeutic effects. Attractively, due to responsive structural color, the patch is endowed with self-reporting performance, which can real-time visually monitor the drug release degree. Taking advantages of these properties, the patches have been demonstrated to achieve satisfying therapeutic effects for in vivo wound treatment. Therefore, we believe that the proposed Chinese herb hydrogel patches are valuable as multifunctional patches for clinical treatment.
研究领域:
药学
·
生物医学工程
·
材料科学
·
伤口护理
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DOI
高影响因子
DYES AND PIGMENTS
·
2025
·
IF 4.2
Yue Huang,Daixuan Gong,Huanda Zheng,Jie Chen,Siqi Zhu,Laijiu Zheng
The solubility of dyes in supercritical carbon dioxide (ScCO 2 ) is a critical parameter in their processing. This study focuses on triazine-based reactive disperse dyes. Their solubility in supercritical carbon dioxide was determined using the static weighing method. The measurement pressure range was 11-23 MPa, and the temperature range was 343.15-383.15 K. The experimental data were analyzed using multiple models. These models included density-based semi-empirical models (Chrastil, MST, Bartle, K-J, and SS) and state equation models (SRK and PR). Compared to the state equation method, the semi-empirical model method does not require the acquisition of complex physical parameters of the solute and exhibits superior correlation performance. The results indicate that the K-J model provides the best prediction accuracy for experimental data, with AARD% values of 3.18, 3.60, and 3.76, respectively. These findings provide critical solubility data and thermodynamic insights for the rational selection of carbon dioxide supercritical fluid dyes, dye structure design, and operational parameters for textile dyeing processes.
研究领域:
化学工程
·
染整技术
·
热力学
·
建模与仿真
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Zhenli Sun,Yiyan Zhang,Zijin Hong,Jingjing Du
Surface-enhanced Raman spectroscopy (SERS) has emerged as a powerful analytical tool for dye monitoring in environmental waters; however, challenges remain in resolving complex mixtures due to spectral overlap and limited signal reproducibility. To address this issue, a dual-channel SERS system integrated with machine learning (ML) was developed. Positively and negatively charged polyelectrolyte-modified Fe 3 O 4 @SiO 2 -Au substrates were employed for the selective detection of anionic and cationic dyes, respectively. Benefiting from the magnetic properties of the substrates, the system enables simultaneous and efficient capture of charge-contrasting dye mixtures. Several classification ML models, including linear discriminant analysis (LDA), k-nearest neighbor (KNN), and decision tree, were constructed to distinguish SERS data from various mixed dyes. The best-performing models, LDA and KNN, achieved classification accuracies exceeding 92 %, and a multimodel ensemble algorithm combining LDA and KNN was designed to harness the strengths of both models, resulting in a classification accuracy of 98 % for mixed dyes. This integrated approach enhances the efficiency and precision of Raman spectroscopic analysis while reducing the need for manual intervention, offering strong potential for high-precision pollutant detection and real-world application in analytical chemistry.
研究领域:
分析化学
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光谱学
·
环境监测
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机器学习
·
纳米技术
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DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·9977
·
IF 15.7
Qin Feiyu,Bai Xiaoya,Fang Yue-Wen,Zhu Pengli,Wang Jun,Cheng Pengtao,Wang Dunhui,Hu Lei,Sun Jun,Ding Xiangdong
Giant negative thermal expansion (NTE), defined by volumetric expansion α V
研究领域:
材料科学
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凝聚态物理
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无机化学
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热膨胀材料
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晶体学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Lanxuan Yang,Lianjiang Tan,Ruili Xu,Zeyuan Tian,Tian Tian,Zhifu Liu,Lili Liu,Yaoqing Chu
The local crystal-field symmetry within a host material plays a critical role in modulating the luminescence behavior of Sm 3+ ions. In this study, we propose a novel Si 4+ doping strategy to enhance the photoluminescence properties of Sm 3+ in a Sr 3 Ga 2 Ge 4 O 14 host, with the effects proposed to be associated with alterations in the symmetry of the local coordination environment. A series of Si 4+ /Sm 3+ co-doped phosphors was synthesized via solid-state reaction. At an optimal Si 4+ doping level of 50 mol%, the emission intensity of Sm 3+ increased by approximately 40%. Further introduction of K + as a charge compensator considerably improved the internal quantum efficiency from 25.12% to 47.28% and color purity from 96.8% to 99.9%. A prototype WLED using the optimized phosphor exhibited a low CCT (5769 K) and a high CRI ( R a = 87.6), satisfying the requirements for indoor lighting. The phosphor was also incorporated into a PVA-based anti-counterfeiting ink, showing bright, stable, and substrate-independent UV-excited fluorescence. This work provides a feasible doping strategy for developing high-performance orange-red phosphors and demonstrates their potential in high-quality WLED and advanced anti-counterfeiting applications.
研究领域:
材料科学
·
光子学
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固态化学
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光电子器件
·
发光材料
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高影响因子
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
·
2023
·Vol. 78
·期 10
·921-926
·
IF 1.8
Cong Liu,Junshen Xing,Zheng Liu,Wenlin Feng
BaSr 2 (PO 4 ) 2 : 4 %Eu 3+ , 4 % A ( A = Li + , Na + , K + ) phosphors were prepared by high-temperature solid-phase method. The crystal structure, photoluminescence properties, thermal stability, chromaticity coordinates, and fluorescence lifetime of the samples were investigated. The excitation and emission spectra of the samples are broadbands and the maximum peak of the emission spectrum is located at 619 nm. Among three charge compensators, the luminescence intensity is optimal for Li + co-doping case, and the quenching temperature of the typical sample is about 500 K. the fluorescence lifetime
τ
is 1469.6 ns, and the chromaticity coordinates exhibit a strong red emission. The present phosphor has a potential application for white light-emitting diodes (LEDs) under the near-ultra violet (n-UV) light excitation.
研究领域:
材料科学
·
光学
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高影响因子
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
·
2022
·Vol. 67
·期 4
·533-538
·
IF 1.667
Jiang Zhen-Zhen,Liu Gao-Ling,Li Ming-Li,Guo Ya-Fei,Meng Ling-Zong,Duo Ji,Deng Tian-Long
Abstract To better use rare earth element resources in geothermal water, it is essential to understand the volumetric property and the ion-interaction of the rare earth element aqueous solution systems. In this paper, the densities of aqueous Y 2 (SO 4 ) 3 from 0.00405 to 0.04071 mol kg −1 at 283.15 to 363.15 K were measured using an Anton Paar Digital vibrating-tube densimeter. Apparent molar volumes ( V ϕ ) and the coefficient of thermal expansion (α) were obtained based on the experimental density data, and the diagrams of the apparent molar volume and coefficient of thermal expansion of Y 2 (SO 4 ) 3 (aq) against temperature ( T ) and molality ( m ) in the binary system were revealed. The Pitzer single-salt parameters \({{(\beta }}_{{{\text{MX}}}}^{{(0)v}},{{\beta }}_{{{\text{MX}}}}^{{(1)v}},{{\beta }}_{{{\text{MX}}}}^{{(2)v}}\,\,{\text{and}}\,\,C_{{{\text{MX}}}}^{v})\) for Y 2 (SO 4 ) 3 and their temperature-dependent correlation F ( i , p , T ) = a 1 + a 2 ln( T /298.15) + a 3 ( T − 298.15) + a 4 /(620 − T ) + a 5 /( T − 227) (where T is temperature in Kelvin, a i are the correlation coefficients) for Y 2 (SO 4 ) 3 were obtained for the first time.
研究领域:
化学
·
物理化学
·
地质学
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Yun-Yun Gao,Xiao-Feng Guo,Lan-Rong Zhao,Shi-Hua Sang
The stable phase equilibria of the ternary system MgBr2 + SrBr2 + H2O at 288 and 308 K were studied with the isothermal dissolution equilibrium method. The compositions of solutions and solid phases have been determined and the equilibrium solid phases at the invariant points were identified with the aid of the X-ray diffraction method. The phase diagrams of this system at 288 and 308 K were both constructed in terms of experimental results. Two stable phase diagrams show that this system is hydrate type I at two temperatures without formation of a solid solution or complex salt. Both the phase diagrams are composed of one invariant point, two univariate curves, and two crystallization regions (SrBr2·6H2O and MgBr2·6H2O). The equilibrium solid phases of the invariant point at 288 and 308 K are both SrBr2·6H2O and MgBr2·6H2O, respectively. Combining the Pitzer single-salt parameters of MgBr2 and SrBr2 reported in the literatures, the unreported mixing ion-interaction parameters θMg,Sr and ΨMg,Sr,Br at 288 and 308 K were fitted with the measured values in this study using the Pitzer equations. The agreement between the experimental values and calculated results in the ternary system MgBr2 + SrBr2 + H2O at 288 and 308 K shows that the parameters fitted with solubilities are reliable.
研究领域:
化学
·
物理化学
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高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Haiqing Wang,Zhenda Liang,Chao Liu,Lishan Zhu,Yongtao Xu,Li Zhou,Bing Yan
Developing low-cost and efficient materials for dye pollutant removal under mild condition remains a great challenge. Here K + and Tb 3+ co-doped porous MnO 2 (K–Tb–MnO 2 ) nanoparticles with tailored properties including crystal structure, surface area and catalytic activity have been synthesized. Experimental results reveal that K–Tb–MnO 2 nanoparticle has higher specific surface area, Mn 3+ content and surface oxygen vacancies than pristine MnO 2 nanoparticle and single-doped MnO 2 materials, showing the uniqueness of dual-doped metal ions . Using methyl blue (MB) as a model pollutant, its removal efficiency by K–Tb–MnO 2 nanoparticles within 5 min is 93.6%, which is 18, 8.3, and 2.9 times higher than that of MnO 2 , K–MnO 2 , and Tb–MnO 2 nanomaterials, respectively. Oxalic acid triggered MnO 2 material dissolving assay and FT-IR spectrum suggested that remarkable performance of K–Tb–MnO 2 nanoparticle toward MB removal can be attributed to a combined effect of adsorption (16% MB removal) and catalytic degradation (84% MB removal). Moreover, K–Tb–MnO 2 nanoparticle mediated MB degradation is demonstrated to be a combination of non-radical oxidation by Mn 3+ and radical-participated degradation, with 1 O 2 as the main species. And the intermediates and pathways of MB degradation were studied by liquid chromatography-mass spectrometry. Importantly, cell viability experiment suggests that the toxicity of MB dye could be efficiently alleviated after the treatment with K–Tb–MnO 2 nanoparticle. These results demonstrate the great potential of the novel K–Tb–MnO 2 particles to be used as a highly effective nanomaterials to reduce the risk of dye wastes toward the environment and human health.
研究领域:
环境科学
·
材料科学
·
生物学
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DOI
PubMed
高影响因子
THERMOCHIMICA ACTA
·
2019
·
IF 2.251
Fei Yuan,Long Li,Yafei Guo,Tianlong Deng
The dilution enthalpies of LiBO 2 (aq) from 0.0398 to 0.7684 mol·kg −1 and LiB 5 O 8 (aq) from 0.0521 to 0.8067 mol·kg −1 at 298.15 K and 101.325 kPa were investigated using the microcalorimeter BT 2.15. The apparent molar enthalpies on two lithium borates were obtained, and the diagrams of their apparent molar enthalpy against molality for LiBO 2 (aq) and LiB 5 O 8 (aq) were also plotted. Considering the constructers of BO 2 - and B 5 O 8 - in aqueous solution are existed as in [B(OH) 4 ]- and [B 5 O 6 (OH) 4 ]-, the Pitzer single-salt parameters ( β M X ( 0 ) L , β M X ( 1 ) L , β M X ( 2 ) L , C M X L ) for LiB(OH) 4 and LiB 5 O 6 (OH) 4 were obtained for the first time. A comparison between the calculated apparent molar enthalpies for LiBO 2 (aq) and LiB 5 O 8 (aq) based on Pitzer model and those determined experimentally agree well, which indicate that the Pitzer single parameters of LiB(OH) 4 and LiB 5 O 6 (OH) 4 obtained are reliable.
研究领域:
物理化学
·
热化学
·
溶液化学
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高影响因子
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