ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Xiaoqian Tan,Yiyue Luo,Zehao Yu,Menghan Li,Chao Wang,Tingxin Ma,Wei Liu,Fuyi Jiang,Litao Kang
A K⁺/Zn²⁺ dual-ion electrolyte is proposed to suppress dissolution and stabilize KZnHCF counter electrodes. • The electrolyte ensures high electrochemical activity for both the PB working electrode and the KZnHCF counter electrode. • The optimized PB-KZnHCF device achieves a large optical modulation, fast switching speed, and excellent cycling stability. KZnHCF (K 2 Zn 3 [Fe(CN) 6 ] 2 ), a typical Prussian blue analog (PBAs), exhibits high transparency regardless of the redox states, making it an ideal transparent counter electrode material for electrochromic devices. However, its cycling durability is seriously limited by stability issues deriving from material dissolution. In this work, we propose a K + /Zn 2+ dual-cation electrolyte to enhance the cycling durability of KZnHCF by changing the Zn 2+ dissolution equilibrium between the electrolyte and the electrode. This electrolyte formulation is also compatible with the Prussian Blue (PB) electrochromic electrodes, enabling excellent electrochromic performance. Based on these merits, a high-performance electrochromic device is constructed by pairing the PB working electrode with the KZnHCF counter electrode in the K + /Zn 2+ electrolyte. This device demonstrates a desirable optical modulation of 52.7% at 633 nm with a coloration and bleaching response time of 5 and 14 s, respectively. After 1000 cycles, 77.8% of the initial optical modulation retains, indicating a decent cycling stability. This work underscores the promise of electrolyte engineering in addressing stability challenges of electrodes, offering a viable pathway to improve the performance of Prussian blue (PB)-based electrochromic devices. Download: Download high-res image (107KB) Download: Download full-size image
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Bin Wang,Chuang He,Qiqi Zheng,Li Cao,Shaoyi Wang,Haijie He,Kai Cui,Wenjie Zhang
Heavy metal contamination in soils poses serious threats to the environment and human health. Cement-based solidification/stabilization (S/S) is a common method for treating heavy metal-contaminated soils due to its simplicity and effectiveness. However, the immobilization efficiency of conventional cement systems is limited. In this study, low-cost and highly dispersible novel carbon nanodots (CNDs) are synthesized from citric acid and urea by a microwave-assisted method and added to cement systems to improve the immobilization of Pb and Cd. Leaching results show that, with 15 wt.% cement, the addition of 0.4 wt.% (by weight of cement) CNDs reduces the leaching concentrations of Pb and Cd by 77.3% and 71.8%, respectively. Leaching results and Tessier analyses show that CNDs promote the transformation of Pb and Cd from exchangeable to stable forms and improve chemical stability. XRD, FTIR, DTG, and SEM results show that CNDs accelerate cement hydration and promote the formation of C–S–H gels, which enhances physical encapsulation. FTIR, UV-Vis, and adsorption results further indicate that oxygen- and nitrogen-containing groups on CNDs complex with Pb 2+ and Cd 2+ and strengthen chemical immobilization. This study provides a cost-effective nanomaterial for improving the immobilization of Pb and Cd in cement-based systems and offers new directions for the application of CNDs in sustainable environmental materials.
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高影响因子
Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·295
·
IF 38.5
Zeng Li,Jiang Chenhui,Li Yuan,Yin Hao,Li Qichao,Liu Hezhou,Guo Yiping
A monolithic, structurally flexible, continuous Pb(Zr 0.52 Ti 0.48 )O 3 (PZT) piezoelectric fiber was innovatively fabricated through network architecture design.
The PZT framework well inherited the macro- and micro-structure of the mesh fabric, endowing the PZT-silicone composite material with high stretchability up to 220%.
The developed strain sensor exhibited both high stretchability (100%) and high sensitivity (39.57 mV kPa −1 ), thus enabling its application in subtle surface roughness perception and large-strain human motion monitoring.
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Scientific Reports
·
2026
·
IF 4.9
Sikandar Anila,Zhao Jing,Ahmad Shakeel,Chu Gang,Pan Bo,Chang Zhaofeng,Liu Yang,Wu Danping,Rashid Audil
Biochar (BC) has been widely used for the lead (Pb(II)) immobilization in soil remediation. However, the mechanisms of dissolution-driven removal of Pb(II) by BC are still poorly understood. Herein, Pb(II) removal was investigated by differentiating BC- and dissolved organic carbon (DOC)-systems. As per the kinetics and isotherms, Pb(II) removal ranged from 31.11% to 80.92% in BC-system. This removal process was significantly influenced by dissolution-driven precipitation which contributed from 23.42% to 84.03% in DOC-system. During Pb(II) removal, an obvious reduction was observed in the released inorganic anions including carbonate (CO 3 2− ), sulfate (SO 4 2− ), and phosphate (PO 4 3− ). The CO 3 2− was a predominant contributor to facilitate Pb(II) precipitation. X-ray diffraction further confirmed the formation of cerussite (PbCO 3 ) and anglesite (PbSO 4 ) on BC surface after Pb(II) removal. Moreover, the decreased fluorescence responses of humic-like and fulvic-like substances were detected in DOC-system with the addition of Pb(II). At the same anion concentration, the enhanced Pb(II) amount was removed with increasing DOC concentration from 1 mg·L − 1 to 5 mg·L − 1 . These results indicated that released DOC exerted a significant contribution on Pb(II) precipitation due to its coagulation effect. This research provides mechanistic insights into the contributions of adsorption and dissolution-driven precipitation in overall Pb(II) removal through BC application.
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Materials
·
2025
·Vol. 18
·期 12
·2871
·
IF 3.2
Yi Wang,Zilong Zhang,Ze Wang,Yujie Yan,Tong Feng,An Xie
Electrochromic devices have garnered significant interest owing to their promising applications in smart multifunctional electrochromic energy storage systems (EESDs) and their emerging next-generation electronic technologies. Tungsten oxide (WO3), possessing both electrochromic and pseudocapacitive characteristics, offers great potential for developing multifunctional devices with enhanced performance. However, achieving an efficient and straightforward synthesis of WO3electrochromic films, while simultaneously ensuring high coloration efficiency and energy storage capability, remains a significant challenge. In this work, a low-temperature hydrothermal approach is employed to directly grow hexagonal-phase WO3films on FTO substrates. This process utilizes sorbitol to promote nucleation and rubidium sulfate to regulate crystal growth, enabling a one-step in situ fabrication strategy. To complement the high-performance WO3cathode, a composite PB/SnO2film was designed as the anode, offering improved electrochromic properties and enhanced stability. The assembled EESD exhibited fast bleaching/coloration response and a high coloration efficiency of 101.2 cm2C−1. Furthermore, it exhibited a clear and reversible change in optical properties, shifting from a transparent state to a deep blue color, with a transmittance modulation reaching 81.47%.
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高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2016
·Vol. 29
·期 5
·607-616
·
IF 0.496
Gong Cheng-yun,Geng Zhi-gang,Dong An-le,Ye Xin-xin,Wang Guo-zhong,Zhang Yun-xia
A facile one-step co-precipitation method was demonstrated to fabricate amorphous sulfur-containing calcium phosphate (SCP) nanoparticles, in which the sulfur group was in-situ introduced into calcium phosphate. The resulting SCP exhibited a noticeable enhanced performance for Pb(II) removal in comparison with hydroxyapatite (HAP), being capable of easily reducing 20 ppm of Pb(II) to below the acceptable standard for drinking water within less than 10 min. Remarkably, the saturated removal capacities of Pb(II) on SCP were as high as 1720.57 mg/g calculated by the Langmuir isotherm model, exceeding largely that of the previously reported absorbents. Significantly, SCP displayed highly selective removal ability toward Pb(II) ions in the presence of the competing metal ions (Ni(II), Co(II), Zn(II), and Cd(II)). Further investigations indicated that such ultra-high removal efficiency and preferable affinity of Pb(II) ions on SCP may be reasonably ascribed to the formation of rod-like hydroxypyromorphite crystals on the surface of SCP via dissolution-precipitation and ion exchange reactions, accompanied by the presence of lead sulfide precipitates. High removal efficiency, fast removal kinetics and excellent selectivity toward Pb(II) made the obtained SCP material an ideal candidate for Pb(II) ions decontamination in practical application.
研究领域:
环境科学
·
材料科学
·
化学工程
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Crystals
·
2024
·Vol. 14
·期 1
·91
·
IF 2.4
Fan Zhang,Hua Hao,Minghe Cao,Zhonghua Yao,Shuai Fu,Hanxing Liu
Piezoelectric ceramics with excellent piezoelectric properties and a high Curie temperature are important for numerous electromechanical devices in a broad range of temperature environments. In this work, the relaxor ferroelectric Pb(Yb1/2Nb1/2)O3end member was selected to be introduced into a BiScO3-PbTiO3high-temperature piezoelectric ceramic to reduce the dielectric loss and improve the piezoelectric properties while slightly reducing the Curie temperature. The phase structure and dielectric, ferroelectric and piezoelectric properties of 0.025Pb(Yb1/2Nb1/2)O3-(0.975−x)BiScO3-xPbTiO3(0.60 ≤x≤ 0.63) ceramics were systematically analyzed, and the best electrical properties were observed in the morphotropic phase boundary regionx= 0.61 withd33= 370 pC/N,kp= 44%,Pr= 33.9 μC/cm2. Importantly, no significant depolarization was observed in thex= 0.61 ceramic from room temperature to 290 °C, demonstrating its good thermal stability and potential applications in a wide range of temperature environments.
研究领域:
材料科学
·
物理学
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iScience
·
2023
·
IF 5.8
Xuan Ding,Jiayi Liu,Hui Shi,Zhou Yi,Lei Zhou,Wei Ren,Penghui Shao,Liming Yang,Derun Zhao,Yun Wei,Xubiao Luo
Efficient and selective removal of Pb(II) from wastewater with complex matrix remains a challenging task. Porous aromatic frameworks (PAFs) with predesigned functional building blocks provide a favorable platform for the selective separation of Pb(II). Herein, the bifunctional SPAFs with the introduction of -OH and -SO 3 H were synthesized through rationally optimizing their steric hindrance. As a result, the SPAF-0.75 exhibits favorable adsorption capacity of Pb(II) (212.34 mg g −1 ), which is 22 times larger than pristine framework. Competition experiment indicates that SPAF-0.75 possess the selective removal of Pb(II) without interfering from co-existing metal ions. The removal rate of SPAF-0.75 still retain at 100% after six successive cycles. The DFT calculation illustrates that -OH and -SO 3 H are co-participate in the process of capturing Pb(II), revealing SPAF-0.75 preferred removal of Pb(II) owing to the lowest adsorption energy (Δ E ab = −3.99 eV). This study extend the understanding of the structure-property relationship and facilitate new possibilities for PAFs.
研究领域:
材料科学
·
环境科学
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Desalination and Water Treatment
·
2024
·
IF 1
Peifei Ding,Weifeng Song,Chao Wang,Zefeng Yu
Metakaolin-based geopolymer was investigated as absorbent to remove Cu(II) and Pb(II) from aqueous solution. The effects of adsorbent quantity, pH, contact time, and initial concentration of Cu(II)/Pb(II) in solutions were investigated. Furthermore, kinetics and isothermal adsorption were fitted by using equations. Kinetic adsorption of Cu(II) and Pb(II) fitted well to pseudo-second-order model. The isothermal adsorption of two heavy metals by the metakaolin-based geopolymer fitted well with Langmuir isotherm adsorption model. The maximum monolayer adsorption capacities were found to be 178.6 mg/g (2.79 mmol/g) and 312.5 mg/g (1.51 mmol/g) for Cu(II) and Pb(II), respectively. Results clearly showed that the adsorption of metal ions on geopolymer was accompanied by ion exchange. Low-cost, convenient, and effective adsorption of Cu(II) and Pb(II) make metakaolin-based geopolymers potential candidates for heavy metal removal in wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理技术
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ADVANCED MATERIALS
·
2026
·
IF 29.1
Jiaxing Xiong,Tianshu Ma,Luolei Shi,Jing Zhang,Yuhong Xu,Qiuxiang Wang,Wendong Zhu,Rong Xuan,Zhenhai Yang,Changlei Wang,Xiaofeng Li,Like Huang,Xiaohui Liu,Yuejin Zhu,Dewei Zhao
All-perovskite tandem solar cells (TSCs) offer a path to exceed the Shockley–Queisser limit of single-junction devices, yet their development is hindered by the inferior efficiency and stability of low-bandgap tin-lead (Sn-Pb) perovskite bottom cells. The inherent grain boundaries (GBs) in Sn-Pb perovskites feature detrimental p -type energy states and unfavorable upward energy band bending that promote non-radiative charge recombination and pathways for ion migration-induced degradation. Herein, we employ dipole management at GBs of Sn-Pb perovskite by 4-(trifluoromethyl)benzohydrazide (FBH), which effectively modulates the GB energy landscape throughout the film. The dipole effect reverses the top surface GB energy states to create downward bending of the energy band, promoting efficient charge separation at GBs. Concurrently, FBH treatment enhances perovskite film quality through grain growth regulation, defect passivation, and immobilization of FA + /I − ions. Consequently, the optimized Sn-Pb perovskite solar cell achieves a high efficiency of 23.25% with outstanding operation stability, i.e., keeping over 80% of its initial efficiency under 85°C thermal stress after 400 h and 90% of its original efficiency upon 1872 h in glove box. All-perovskite TSC obtains 29.67% efficiency and retains 90% of its initial efficiency after approximately 1000 h maximum power point tracking.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xiangrong Cao,Lei Kang,Shaoxing Guo,Minggang Zhang,Zheshuai Lin,Jianhua Gao
Developing environmentally friendly, stable, and narrow and direct band gap halide perovskite materials has attracted substantial interest because of their wide range of potential applications. Here, an all-inorganic Pb-free halide double perovskite, Cs2NaVCl6, was prepared by the solid-state reaction method and hydrothermal method. Cs2NaVCl6 crystallizes in the cubic Fm3̅m space group with the unit parameter a = 10.3497(14) Å. The combined density functional theory and experimental study demonstrates that the compound is a direct band gap semiconductor with a band gap of ∼2.64 eV. More importantly, it exhibits strong visible and near-infrared light absorptions and markedly ambient and thermal stability.
研究领域:
材料科学
·
光伏技术
·
无机化学
·
半导体材料
·
光电子学
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 115
·113940-113950
·
IF 3.289
Xi Wen,Chun-Tao Shao,Wei Chen,Yong Lei,Qin-Fei Ke,Ya-Ping Guo
Pb(II) ions are highly harmful to the environment and human health because of their bioaccumulation, non-degradability and toxicity. Herein, we fabricated mesoporous carbonated hydroxyapatite (HAP)/chitosan (CS) porous materials (MHCMs) by using calcium carbonate/CS porous materials (CCPMs) as precursors. After soaking in phosphate buffer solution (PBS), the CaCO3 particles in the CCPMs were converted to carbonated HAP plates with a preferred c-plane orientation via a dissolution–precipitation reaction. The MHCMs possessed interconnected macropores with pore sizes of 50–150 μm and mesopores with pore sizes of 3.97 nm, which caused them to have a great BET surface area of 111.3 m2 g−1 and a pore volume of 0.199 cm3 g−1. The sorption performance of the MHCMs for Pb(II) ions was evaluated by the flow of 400 mg L−1 lead solutions through the adsorbents, and HAP/CS porous materials (HCPMs) served as control samples. After adsorbing Pb(II) ions, the HAP particles in both the MHCMs and HCPMs were transferred into lead hydroxyapatite (PbHAP) rods. At the adsorption equilibrium, the adsorption amounts of the MHCMs and HCPMs arrived at 559.6 and 264.4 mg g−1, respectively. The MHCMs had better adsorption properties than the HCPMs because of their large surface area, hierarchically porous structures, low Ca/P ratio, good degradability and plate-like carbonated HAP with a preferred c-plane orientation. The adsorption of Pb(II) ions on MHCMs exhibited higher compliance with the pseudo-second-order kinetic model than the pseudo-first-order kinetic model, suggesting that the adsorption process was mainly controlled by chemical adsorption for Pb(II) ions. Therefore, the MHCMs have great potential for the removal of Pb(II) ions from aqueous solutions even under flow conditions.
研究领域:
环境科学
·
材料科学
·
水处理
·
吸附技术
·
无机化学
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