CERAMICS INTERNATIONAL
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2025
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IF 5.6
Yan Mu,Junjun Wang,Bingsen Wang,Yufang Jiao,Jian He,Meng Liu,Che Sun,Shaoyang Yuan,Danqing Liu,Wenlong Yang,Fengmin Wu
Lead-free BNT-BT based ceramics exhibit significant potential for achieving high piezoelectric performance. However, it is an effective strategy to achieve a morphotropic phase boundary (MPB) region with good thermal stability remains challenging. Herein, the incorporation of K 0.5 Na 0.5 NbO 3 into the Bi 0.5 Na 0.5 TiO 3 -BaTiO 3 binary system was explored, leading to a significant enhancement in both piezoelectric performance and thermal stability. The ternary BNT-BT-KNN ceramic system was systematically investigated with respect to its phase diagram, crystal structure, electrical properties, and relaxation behavior. It was observed that both the grain size and domain size gradually decrease as the KNN content increases. Remarkable electromechanical coupling factor ( k p = 0.217), exceptionally high piezoelectric properties ( d 33 = 105 pC/N), and improved ( T d = 164 °C) were achieved at BNT-BT-0.01KNN ceramics. The phase diagram of BNT-BT-KNN has been established, offering a comprehensive roadmap for the development of high-performance piezoelectric ceramics with enhanced piezoelectric responses. This work may facilitate potential applications in piezoelectric actuators.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 18
·e202305086
·
IF 1.9
XuKun Qian,ZeFeng Zhao,RuiHua Zhang,ChangBai Yu
Graphical The adsorption capacity of Pb(II) ion for accordion-like Ti 3 CN Mxene is significantly increased after alkalization treatment. The maximum adsorption capacity of the alkalized Ti 3 CN MXene is up to 87.4 mg ⋅ g −1 , and the adsorption ratio reaches 96.6 %. The adsorption process is mainly controlled by chemical adsorption and belongs to surface monolayer adsorption. The presence of poisonous Pb(II) ions in water resources has raised global health concerns. Herein, the adsorption performance of accordion-like Ti 3 CN MXene for Pb(II) ions was investigated for the first time. Batch experiments were carried out by varying modifications, pH values, initial Pb(II) concentrations, adsorption time and temperatures. The results prove that the alkalized-Ti 3 CN shows enhanced adsorption performance. Although the temperature effect is insignificant, the Pb(II) adsorption is strongly pH-dependent. The maximum Pb(II) adsorption capacity of alkalized −Ti 3 CN is about 2.5 times higher than that of activated carbon. The adsorption ratio of Pb(II) is up to 96.6 %. The adsorption capacity increases with increasing the initial concentration of Pb(II). The alkalized-Ti 3 CN adsorbs Pb(II) very quickly and the adsorption equilibrium is nearly achieved within 70 minutes. The adsorption follows the quasi-second-order kinetic model as well as the Langmuir model, and is mainly controlled by chemical adsorption. It is preliminarily concluded that Pb(II) replaces Na(I) of the −ONa functional groups on the alkalized-Ti 3 CN surfaces. This study proves the alkalized-Ti 3 CN MXene has potential application for the purification treatment of wastewater contaminated with Pb(II) ions.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
BMC Chemistry
·
2024
·Vol. 18
·期 1
·1-9
·
IF 4.3
Wang Qi,Yan Huiyu,Yao Linyan,Guo Ying,Xiao Jianxi
Fly ash derived from municipal solid waste incinerators (MSWIs) harbors significant quantities of heavy metals with high leaching toxicity, resulting in detrimental environmental effects. Pb 2+ in fly ash is the ion most likely to exceed permissible levels. However, chemical stabilization methods demonstrate poor efficacy in stabilizing Pb 2+ under acidic conditions. Herein, we have developed a robust acid-resistant chelating polymer (25DTF) for enhanced stabilization of Pb 2+ in fly ash. 25DTF was synthesized through the reaction of formaldehyde with 2,5-dithiourea. 25DTF exhibited remarkable chelation efficiency, nearing 100%, for Pb 2+ in fly ash. 25DTF demonstrated exceptional chelation efficiency, surpassing 99.9%, when interacting with Pb 2+ in fly ash at pH ≤ 7. Even under acidic conditions, 25DTF effectively prevented the secondary dissolution of Pb 2+ . Additionally, it indicated outstanding Pb 2+ chelation efficiency across diverse regions of China. The 25DTF chelating agent shows considerable potential in alleviating metal ion contamination in soil, wastewater, and urban environmental management, thereby fostering advancements in environmental stewardship.
研究领域:
环境科学
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Chenglin Gong,Lin Lin,Yingzhen Wu,Yanan Zhang,Zhuohong Feng,Zhezhe Wang,Yantang Huang,Zhiqiang Zheng
In this paper, Cs 2 NaErCl 6 double perovskites microcrystals (MCs) co-doped with Yb 3+ and Bi 3+ are successfully synthesized by a simple “dissolving-drying” method. When excited at 379 nm, 808 nm and 980 nm, the MCs show strong red, green and yellow light, respectively, which can be well distinguished by the naked eyes. On this basis, two kinds of systems are designed with doped/undoped MCs for triple-mode fluorescent anti-counterfeiting and information encryption of numbers and characters. The results indicate that our MCs are not only beneficial to the application of fluorescent anti-counterfeiting, but also greatly improve the security of anti-counterfeiting. In addition, we evaluate the temperature sensing performance of these MCs by fluorescence intensity ratio technique. The samples show a high relative sensitivity as 3.8 %/K at 243 K. The results show that the samples have multi-functional applications in the fields of fluorescent anti-counterfeiting and temperature sensing, and this work will broaden the application fields of lead-free double perovskites in fluorescent anti-counterfeiting and temperature sensing.
研究领域:
材料科学
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光学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2024
·Vol. 31
·期 20
·29264-29279
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IF 0
Lyu Shiqi,Abidin Zurina Zainal,Yaw Thomas Choong Shean,Resul Mohamad Faiz Mukhtar Gunam
Guided by efficient utilization of natural plant oil and sulfur as low-cost sorbents, it is desired to tailor the porosity and composition of polysulfides to achieve their optimal applications in the management of aquatic heavy metal pollution. In this study, polysulfides derived from soybean oil and sulfur (PSSs) with improved porosity (10.2–22.9 m 2 /g) and surface oxygen content (3.1–7.0 wt.%) were prepared with respect to reaction time of 60 min, reaction temperature of 170 °C, and mass ratios of sulfur/soybean oil/NaCl/sodium citrate of 1:1:3:2. The sorption behaviors of PSSs under various hydrochemical conditions such as contact time, pH, ionic strength, coexisting cations and anions, temperature were systematically investigated. PSSs presented a fast sorption kinetic (5.0 h) and obviously improved maximum sorption capacities for Pb(II) (180.5 mg/g), Cu(II) (49.4 mg/g), and Cr(III) (37.0 mg/g) at pH 5.0 and T 298 K, in comparison with polymers made without NaCl/sodium citrate. This study provided a valuable reference for the facile preparation of functional polysulfides as well as a meaningful option for the removal of aquatic heavy metals.
研究领域:
环境科学
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材料科学
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DOI
PubMed
CRYSTAL RESEARCH AND TECHNOLOGY
·
2024
·Vol. 59
·期 7
·2400060
·
IF 1.5
Shuyue Xie,Jinting Wu,Baohan Li,Huicong Liu,Hao Wang,Jun Li,Bo Zhang
Exploring new haloplumbate hybrids and understanding the structure-activity relationships are of great significance for further promoting their applications in the photovoltaic fields. Herein, with the in situ-formed [Hmd] + (md = 2-methyl-1,3-diazinane) templates, a new organic–inorganic hybrid iodoplumbate, namely [Hmd]PbI 3 ( 1 ), is successfully constructed and then structurally characterized using multiple technical approaches. X-ray crystallography studies show that compound 1 features the typical 1D chain-like motifs of [Pb 2 I 6 ] n 2 n − , generating the 3D supermolecular network by the extensive hydrogen bond interactions. Interestingly, compound 1 exhibits the semiconductive behavior, with an optical band gap of 2.72 eV. More attractively, the title compound has good photoelectric switching performances under the alternating light irradiation, whose photocurrent densities compete well with or surpass those of many metal halide counterparts. Further theoretical analyses reveal that the title compound has a more dispersive band structure (especially the value band) that facilitates the transport of charge carriers, which may be the main origin of its excellent optoelectronic performance. Presented in this paper also bring the studies of Hirshfeld surface, X-ray photoelectron spectroscopy (XPS) as well as thermogravimetric analysis.
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·
IF 3.3
Huajin Tao,Nan Wang,Yitian Ma,Ahua Xu,Baoyu Huang,Xiaogan Li
This study introduces the development of a portable electrochemical sensor for the detection of Pb(II) and Cd(II) ions based on a screen-printed graphene electrode (SPGE) enhanced with alkalized MXene and gold nanoparticles (AuNPs). Experimental results reveal that the Au@Alk-MXene/SPGE electrode exhibits excellent electrical conductivity, enlarged active surface area, and efficient electron transfer capability, which enhances the electrochemical detection of Pb(II) and Cd(II) ions. Under optimal experimental conditions, the sensor demonstrates good electrochemical response and distinct stripping peaks for both ions. The linear detection range of the sensor is 5-130 μg L⁻¹ for both Pb(II) and Cd(II), with detection limits of 0.198 μg L⁻¹ for Pb(II) and 0.106 μg L⁻¹ for Cd(II). Furthermore, the sensor shows excellent repeatability with relative standard deviations (RSDs) of 1.16% (n = 10) for Pb(II) and 1.25% (n = 10) for Cd(II), as well as remarkable reproducibility with RSD values of 1.56% for Pb(II) and 1.57% for Cd(II). The sensor was successfully applied to analyze tap water and lake water samples, demonstrating satisfactory recovery rates. This research shows the use of MXenes and AuNPs to modify SPGE electrodes, offering a rapid and portable electrochemical sensor for detecting Pb(II) and Cd(II) ions in water.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
CHEMOSPHERE
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2024
·
IF 8.1
Yasir Hamid,Yonglong Chen,Qiang Lin,Muhammad Haris,Muhammad Usman,Muhammad Saqib Rashid,Ioannis Anastopoulos,Bilal Hussain,Hayssam M. Ali,Fakhir Hannan,Xianyuan Yin,Xiaoe Yang
The impact of functionality of biochar on pressing environmental issue of cadmium (Cd) and lead (Pb) co-contamination in simultaneous soil and water systems has not sufficiently reported. This study investigated the impact of Fe- and Mg-functionalized wheat straw biochar (Fe-WSBC and Mg-WSBC) on Cd and Pb adsorption/immobilization through batch sorption and column leaching trials. Importantly, Fe-WSBC was more effective in adsorbing Cd and Pb (82.84 and 111.24 mg g −1 ), regeneration ability (removal efficiency 94.32 and 92.365), and competitive ability under competing cations (83.15 and 84.36%) compared to other materials (WSBC and Mg-WSBC). The practical feasibility of Fe-WSBC for spiked river water verified the 92.57% removal of Cd and 85.73% for Pb in 50 mg L −1 and 100 mg L −1 contamination, respectively. Besides, the leaching of Cd and Pb with Fe-WSBC under flow-through conditions was lowered to (0.326 and 17.62 mg L −1 ), respectively as compared to control (CK) (0.836 and 40.40 mg L −1 ). In short, this study presents the applicable approach for simultaneous remediation of contaminated water and soil matrices, offering insights into environmentally friendly green remediation strategies for heavy metals co-contaminated matrices.
研究领域:
环境科学
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土壤学
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水文学
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DOI
PubMed
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2025
·
IF 7.2
Wang Chao,Wu Zhongxian,Wang Tongbo,Qiao Bo,Huang Hao,Ran Jincheng,Ma Guangxi,Tao Dongping
To investigate the mechanisms of how nanobubbles enhance the flotation separation performance of galena from pyrite, the effects of nanobubbles on the surface properties of galena and pyrite and the interactions between mineral particles and air bubbles were examined in this study. Various analytical techniques, including focused beam reflectance measurement (FBRM), three-phase contact line (TPCL) analysis, atomic force microscopy (AFM), and contact angle measurement, were employed. It has been demonstrated that nanobubbles significantly enhanced the flotation recovery of galena and its flotation selectivity from pyrite, as compared to the conventional flotation process. The preferential formation of nanobubbles on the galena surface, which is more hydrophobic than pyrite surface, further increased the surface hydrophobicity and agglomeration of galena particles. The introduction of nanobubbles into the flotation system also increased in the maximum TPCL length and detachment length between the galena surface and bubbles, contributing to the enhanced flotation efficiency.
研究领域:
矿物加工工程
·
界面化学
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DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Si Liu,Jinhui Huang,Lixiu Shi,Wenjuan He,Wei Zhang,Enjie Li,Chenyu Zhang,Haoliang Pang,Xiaofei Tan
In this study, the impact of surfactants on the adsorption behavior of Pb(II) onto microplastics-sediment (MPs-S) complexes was investigated. Firstly, virgin polyamide (VPA) and polyethylene (VPE) were placed in Xiangjiang River sediment for six months to conduct in-situ aging. The results indicated that the biofilm-developed polyamide (BPA) and polyethylene (BPE) formed new oxygen-containing functional groups and different biofilm species. Furthermore, the adsorption capacity of Pb(II) in sediment (S) and MPs-S complexes was in the following order: S > BPA-S > VPE-S > VPA-S > BPE-S. The addition of sodium dodecyl benzenesulfonate (SDBS) promoted the adsorption of Pb(II), and the adsorption amount of Pb(II) increased with the higher concentration of SDBS, while adding cetyltrimethylammonium bromide (CTAB) showed the opposite result. The adsorption process of MPs-S complexes to Pb(II) was dominated by chemical adsorption, and the interaction between MPs-S complexes and Pb(II) was multilayer adsorption involving physical and chemical adsorption when the surfactants were added. Besides, the pH exerts a significant effect on Pb(II) adsorption in different MPs-S complexes, and the highest adsorption amount occurred at pH 6. Noteworthy, CTAB promoted the adsorption ability of Pb(II) when the exogenous FA was added. The binding characteristic of sediment endogenous DOM components and Pb(II) was influenced by the addition of MPs and surfactants. Finally, it confirmed that adsorption mechanisms mainly involve electrostatic and hydrophobic interaction. This study provides a new perspective to explore the environmental behaviors of Pb(II) by MPs and sediments with the addition of surfactants, which was conducive to evaluating the ecological risks of MPs and heavy metals in aquatic environments.
研究领域:
环境科学
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生态学
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DOI
PubMed
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 12
·e202404631
·
IF 2
Shuang Chen,Zhenzhen Huang,Zhongxian Song,Yanli Mao,Hongpan Liu,Yanyan Dou,Haiyan Kang,Hanyu Jin,Qiaoyang Huang,Xuejun Duan
Graphical In this paper, natural psilomelane catalysts were prepared by high temperature roasting method for the degradation of TC, which showed excellent catalytic activity at 500°C. In the NP-500/PMS system, the degradation efficiency of TC was as high as 84.6% in 30 min, which indicates that it has a promising application in the field of wastewater treatment. Tetracycline (TC) is a prominent antibiotic that remains largely unmetabolized in humans and animals, resulting in significant excretion into the environment. This poses a substantial threat to human health, highlighting the urgent necessity for effective removal of TC from water sources. A series of catalytic materials were prepared by subjecting natural psilomelane (NP) to roasting at varying temperatures and subsequently employed to activate persulfate for the degradation of tetracycline. The natural psilomelane roasted at 500 °C (NP-500) exhibited the excellent catalytic activity compared to the unroasted natural psilomelane. The removal rate of tetracycline at a concentration of 30 mg/L was 84.6% when a dosage of 0.5 g/L of catalyst and 0.5g/L of PMS was employed. Furthermore, an appropriate calcination temperature could facilitate the generation of oxygen vacancies and active metal ions (Fe, Mn), which were crucial for the formation of active oxygen. Besides, superoxide radicals (O 2 • − ) and singlet oxygen ( 1 O 2 ) were the primary reactive species. And the initial pH and co-existing anion experiments showed that the NP-500/PMS system presented a wide range of potential applications. Finally, based on the LC-MS and experimental results, a possible degradation pathway and mechanistic map of TC were proposed.
研究领域:
环境科学
·
催化材料
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DOI
高影响因子
CHEMICAL GEOLOGY
·
2020
·
IF 3.363
Weiyan Que,Bihe Wang,Feili Li,Xiujuan Chen,Hui Jin,Zanfang Jin
The accumulation of heavy metals by freshwater algae becomes more complex in the presence of dissolved organic matter but it is unclear how and to what extent. In this study, we comparatively assessed the effects of malic acid and citric acid on the bioaccumulation of Pb by Chlorella pyrenoidosa . A 6 h exposure experiment showed that adding organic acid (OA) to an algae–Pb binary system prolonged the adsorption equilibrium time and that the extended time was related to the concentration and number of carboxyl groups of the OA. A pseudo-second-order model fit the kinetic data well in the presence of OAs. The normality of carboxyl groups was negatively correlated with the bioaccumulation rate, k 2 , but positively correlated with the maximum bioaccumulation capacity, q max , of Pb following a linear equation, Y = 121.3x + 52.2, R 2 = 0.9877. Neither the Freundlich model nor the Langmuir model could fit the isotherm data in the presence of OA, suggesting that a new mechanism might exist. The quantitative relationship between bioaccumulated Pb and carboxyl group of OA indicated a stoichiometric relationship, which seemed to support the theory of a ternary complex of Pb, OA, and algal surface. Our results have added clarity to the current understanding of the accumulation of heavy metals by algae in freshwater ecosystems .
研究领域:
环境科学
·
水生生物学
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DOI
高影响因子
危险品化学品经营许可证（带存储）