FOOD CHEMISTRY
·
2023
·
IF 8.8
Ya Zhang,Ying Xu,Ning Li,Xiaofang Liu,Yi Ma,SiyiYang,Huibo Luo,Changjun Hou,Danqun Huo
Here, we constructed a novel ultra-sensitive electrochemical sensor based on ZIF-67@antimonene (AMNFs) nanocomposites which are based on the first-principles density functional theory the adsorption properties of antimonene on heavy metal ions were studied for simultaneous determination of Cu 2+ , Pb 2+ and Hg 2+ . The ZIF-67@AMNFs was prepared by using ZIF-67 MOF surface loaded with a large amount of antimonene sheet. Its morphology and crystal structure were characterized by Transmission electron microscope (TEM), Energy Dispersive Spectroscopy (EDS), X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). Functional ZIF-67@AMNFs due to its unique layered structure, large active surface area, strong adsorption capacity and good electrical conductivity. In addition, the adsorption capacity of the sensor electrode for Cu 2+ , Pb 2+ and Hg 2+ was effectively enhanced. The detection limits of Cu 2+ , Pb 2+ and Hg 2+ were 0.01 pM, 0.042 pM and 0.031 pM, respectively. The determination mechanism of Cu 2+ , Pb 2+ and Hg 2+ was further clarified based on the adsorption properties and electrochemical accumulation of antimonene on metal atoms. It has been successfully applied to the simultaneous determination of Cu 2+ , Pb 2+ and Hg 2+ in rice, sorghum, corn, milk, honey and tea samples, and has good practicability.
研究领域:
食品科学
·
材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 10
·5430-5441
·
IF 14.511
Huaijie Shi,Ge Feng,Suiqin Li,Jia Liu,Xinying Yang,Ye Li,Ye Lu,Xing Zhong,Shibin Wang,Jianguo Wang
An alternative method for producing ozone, electrochemical ozone production (EOP) is a major area of interest in the field of in situ sterilization and disinfection. However, commercial lead dioxide as a traditional anodic electrocatalyst is highly toxic and has low durability, and exploring anodic electrocatalysts with lower lead content and performance loss is challenging. Herein, a series of pyramidal sillenite-type Bi12PbO20 materials were designed and fabricated with a hydrothermal method in which Pb was introduced to Bi2O3 frameworks. The product, Bi12PbO20-3, exhibited remarkable EOP performance, with faradaic efficiency of 15.1% at 50 mA cm−2 in a neutral solution, which was almost 1.5 times that of commercial β-PbO2. Computational simulations further demonstrated that the confined [Pb–O4] fragment was confined in the Bi–O bonding environment of Bi12PbO20, the low oxygen vacancy formation energy resulted from the weak Pb–O interaction and remarkably enhanced EOP activity. Such a local confined environment plays a vital role in suppressing Pb loss, thereby accounting for the robust EOP stability. Additionally, the significant performance of the membrane electrode assembly system in the electrochemical degradation of antibiotics and pesticides implied the potential environmental application capabilities of Bi12PbO20.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Boyi Wang,Yongli Wang,Shuqi Zheng,Shichao Liu,Juan Li,Siyi Chang,Teng An,Weilu Sun,Yuxuan Chen
Pb doped Cu 3 Sb 1-x Pb x Se 4 (x = 0, 0.01, 0.02, 0.04 and 0.06) compounds have been synthesized via microwave-assisted solvothermal method followed by SPS progress, and their thermoelectric properties from 300 K to 623 K has been explored. On one hand, Pb doping in the Sb site improved the electrical properties of Cu 3 SbSe 4 , on the other hand, the second phase PbSe formed at the high doping content (x ≥ 0.02) reduced the thermal conductivity by the phonon scattering. Altogether, the improvement of the electrical properties and decrease of the thermal conductivity results in a promising peak zT of ∼0.52 at 623 K of Cu 3 Sb 0.96 Pb 0.04 Se 4 sample, which is about 80% higher than that of the un-doped Cu 3 SbSe 4 . The current work provides a method which can reduce the thermal conductivity by forming heterojunction and also improve the electrical properties by doping of one element.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2013
·
IF 1.773
Xiaolin Yu,Shengrui Tong,Maofa Ge,Lingyan Wu,Junchao Zuo,Changyan Cao,Weiguo Song
A novel nanoadsorbent for the removal of heavy metal ions is reported. Cotton was first hydrolyzed to obtain cellulose nanocrystals (CNCs). CNCs were then chemically modified with succinic anhydride to obtain SCNCs. The sodic nanoadsorbent (NaSCNCs) was further prepared by treatment of SCNCs with saturated NaHCO 3 aqueous solution. Batch experiments were carried out with SCNCs and NaSCNCs for the removal of Pb 2+ and Cd 2+ . The effects of contact time, pH, initial adsorption concentration, coexisting ions and the regeneration performance were investigated. Kinetic studies showed that the adsorption equilibrium time of Pb 2+ and Cd 2+ was reached within 150 min on SCNCs and 5 min on NaSCNCs. The adsorption capacities of Pb 2+ and Cd 2+ on SCNCs and NaSCNCs increased with increasing pH. The adsorption isotherm was well fitted by the Langmuir model. The maximum adsorption capacities of SCNCs and NaSCNCs for Pb 2+ and Cd 2+ were 367.6 mg/g, 259.7 mg/g and 465.1 mg/g, 344.8 mg/g, respectively. SCNCs and NaSCNCs showed high selectivity and interference resistance from coexisting ions for the adsorption of Pb 2+ . NaSCNCs could be efficiently regenerated with a mild saturated NaCl solution with no loss of capacity after two recycles. The adsorption mechanisms of SCNCs and NaSCNCs were discussed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Xiaoqiong Wang,Hao Guo,Ning Wu,Mengni Xu,Longwen Zhang,Wu Yang
A novel dual-emission ratio fluorescent sensor (N-CDs/R-CDs@ZIF-8) has been constructed successfully by introducing nitrogen-doped blue fluorescence carbon dots (N-CDs) and red fluorescence carbon dots (R-CDs) into the synthetic environment of ZIF-8 by a simple stirring method. The synthesized material not only inherits the excellent optical properties of N-CDs and R-CDs and the strong adsorption and accumulation performance of ZIF-8, but also shows strong fluorescence and structural stability in extreme environments. The presence of Pb 2+ strongly causes the fluorescence quenching of N-CDs, but has almost no effect on the fluorescence of R-CDs. Therefore, a ratio fluorescence sensor is developed for the determination of Pb 2+ . Most importantly, the real-time fluorescence response shows that the composite material has a high selectivity and good sensitivity to Pb 2+ determination, and the calculated LOD is 4.78 nM(S/N = 3) (0.05–50 μM), indicating that the material can be used as a potential fluorescent sensor for Pb 2+ detection.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yan Chen,Chunli Hu,Zhi Fang,Yilin Li,Jianggao Mao
Birefringent materials capable of modulating the polarization of light have attracted intensive studies because of their wide utilization in optical communication and the laser industry. Herein, two new lead(II)-based cyanurates, namely, Pb(H2C3N3O3)X (X = OH, F), were synthesized by hydrothermal methods, and the first halogen-containing metal cyanurate Pb(H2C3N3O3)F was successfully obtained by the rational substitution of a homovalent anion. Pb(H2C3N3O3)X (X = OH, F) belong to space group P1̅, and their structures display a neutral [Pb(H2C3N3O3)X] (X = OH, F) layer. The Pb2+ ions in Pb(H2C3N3O3)(OH) are interconnected by hydroxyl groups and oxygen atoms of cyanurate anions into a 1D [PbO(OH)]− chain, whereas the Pb2+ ions in Pb(H2C3N3O3)F are interconnected by F– anions and oxygen atoms of cyanurate anions into a 2D [PbOF]− layer. The π–π interactions between adjacent hydroisocyanurate rings and the hydrogen bonds between neighboring neutral layers provide additional stability to the structures. Luminescent studies show that Pb(H2C3N3O3)(OH) and Pb(H2C3N3O3)F emit yellow-green and blue light, respectively. Theoretical calculations unveiled their birefringences of 0.079 and 0.203@1064 nm and their band gaps of 3.96 and 4.96 eV, respectively, for OH– and F– containing materials. Obviously, the substitution of OH– by F– with the largest electronegativity can simultaneously improve both the birefringence and band gap.
研究领域:
材料科学
·
光学材料
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Mengqing Hu,Di Zhao,Xinlong Yan,Yun Wang,Jin Zhang,Xiaoyan Hu,Ming Zhou,Porun Liu
Designing advanced bimetallic catalysts is essential to improving peroxymonosulfate (PMS) activation. Herein, a novel magnetic nickel/cobalt-layered double hydroxide decorated nitrogen-doped carbon (Ni/Co LDH@NC) catalyst we synthesized using carbonized ZIF-67 as a template for simultaneous removal of sulfamethoxazole (SMX) and Pb(Ⅱ) by PMS activation. The synthesized Ni/Co LDH@NC achieved complete degradation of SMX within 20 min and adsorbed Pb(Ⅱ) at 90.3 mg g −1 in 2 h. Notably, in simulated mixed wastewater, Ni/Co LDH@NC removed 100 % of SMX and simultaneously absorbed 84 % of Pb(Ⅱ) within 60 min. Density functional theory (DFT) studies revealed that synergistic Ni-Co sites and “bridging oxygen” vacancies enhanced electron transfer to PMS, facilitating O-O bond cleavage. The catalyst maintained high performance after four cycles, with over 85 % SMX degradation and 80 % Pb(Ⅱ) removal. This study highlights the potential of MOF-derived catalysts for efficient, simultaneous remediation of antibiotic and heavy metal pollutants, contributing to advanced wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 8
·3880-3889
·
IF 3.9
Wang Haiping,An Xianhui,Qian Xueren
Fluorescent anti-counterfeiting paper was a very important kind of special paper, which played an important role in people’s life, such as paper money. In this work, fluorescent anti-counterfeiting paper was prepared by using lead-metal–organic framework (Pb-BTC) that was in situ formed on the surface of pulp fibers (PFs) with lead ions and pyromellitic acid (H 4 BTC), which served as template to in situ anchoring of CH 3 NH 3 PbBr 3 (MAPbBr 3 ) to achieve the controllable synthesis of MAPbBr 3 and reduce aggregate fluorescence quenching. The CH 3 NH 3 Br (MABr) as the anti-counterfeiting ink was applied on Pb-BTC@PFs to achieve security writing. MAPbBr 3 forming writing was invisible under sunlight but displayed green fluorescence under 365 nm ultraviolet lamp excitation. The writing with green fluorescence could be extinguished by water and reconstructed by forming new MAPbBr 3 . The Pb-BTC@PFs was as the precursor to product fluorescent anti-counterfeiting paper (MAPbBr 3 @Pb-BTC@PFs) reacted with MABr in ethanol solution, so that the green fluorescence of it was opened under 365 nm ultraviolet lamp. When it was exposed to polar solution, MAPbBr 3 structure collapsed. Since Pb-BTC was stably in paper and was not easy to lose in polar solution, it could be reused several times on the premise that the paper structure was not damaged, which demonstrated an advantage over using perovskite alone in paper. Consequently, the current study not only provided a new idea for controllable anchoring perovskite on support materials, but also offered a new method for producing fluorescent anti-counterfeiting paper.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
AQUACULTURE
·
2020
·
IF 3.225
Haisu Liu,Shengli Fu,Sanshan Zhang,Mingmei Ding,Anli Wang
Lead (Pb) is an environmental pollutant that can accumulate in fish and humans. In this study, the effects of juvenile bighead carp ( Hypophthalmichthys nobilis ) on the intestinal structure, gut microbiota and cell apoptosis in the intestine of juvenile bighead carp ( Hypophthalmichthys nobilis ) after 96 h of Pb exposure were detected. The results showed that the intestinal barrier was severely damaged, including intestinal leukocyte infiltration , goblet cells significantly increased, intestinal villi shortened significantly, and abnormal thickening of the intestinal wall. Meanwhile, the mRNA expressions of structure related genes ( villin-1 and Claudin-12 ) were down-regulated after Pb exposure, while pro-inflammatory factors ( IL-8 and TNF-α ) were up-regulated and peaked at 48 h. It shows that Pb causes intestinal inflammation and destroys intestinal structure. Furthermore, MiSeq sequencing data of the 16S rRNA gene V3-V4 region revealed a reduction in richness and diversity of intestine microbiota after Pb exposed. At the phylum level, the abundance of enteropathogenic bacteria ( Proteobacteria and Bacteroidetes ) were increased significantly whereas Firmicutes and Cyanobacteria were decreased significantly after exposed to Pb. A more in-depth analysis, at the genus level, a total of 40 intestinal microbes identified by operational taxonomic unit (OTU) analysis were obviously changed at 6 h, 48 h and 96 h after exposure to Pb, and the abundance of pathogenic bacteria such as Chryseobacterium also increased significantly. The functional prediction results of intestinal flora showed that the abundance of apoptosis was down-regulated after Pb exposure. It was consistent with the mRNA expressions of Bid , Caspase-2 , and Caspase-3 , indicating that apoptosis function of cells and intestinal flora was disturbed. Taken together, it is speculated that Pb may lead to the destruction of the intestinal barrier of bighead carp, leading to the disorder of the intestinal microbial community , which in turn promotes the occurrence of cell apoptosis. Our research provided some evidence for the association between microbiota dysbiosis and cell apoptosis after Pb exposure in the intestine of juvenile bighead carp.
研究领域:
环境科学
·
水生毒理学
·
微生物学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 35
·11895-11904
·
IF 6.4
Mengdi Cheng,Yangxi Yan,Zhimin Li,Pangpang Wang,Ri-ichi Murakami,Dongyan Zhang
Modern electronic devices are highly in demand for high-performance piezoelectric materials. Herein, Pb(Ni, Nb)O3–Pb(Lu, Nb)O3–PbTiO3 piezoelectric ceramics are investigated, among which the 0.52PNN–0.16PLN–0.32PT ceramic shows the best performance (d33 = 850 pC N−1, d33* = 1139 pm V−1). Excellent piezoelectricity can be explained by multiphase coexistence, as well as an enhanced local heterogeneous structure. Polar nanoregions that promote polarization rotation are an important cause of high piezoelectricity according to characterization using SEM and PFM. TEM also confirmed a heterogeneous domain configuration with two coexisting phases. In addition, a large signal piezoelectricity of 1000 pm V−1 is maintained in the temperature range of 20–90 °C. This work presents an excellent example of achieving both high piezoelectric properties and a good temperature range in relaxor ferroelectric ceramics.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Zheng Yin,Wei-Min Ma,Ce Wang,Xiao-Peng Luo,Xiao-Ting Hu,Li-Hui Cao,Xi-Yao Li,Xin-Yu Yu,Yang-Min Ma,Ming-Hua Zeng
The active lone pair electron effect and highly flexible coordination geometry of Pb2+ prevented the rational construction of metal–organic frameworks (MOFs) but promoted excellent fluorescence tuning. The regulation on organic and alkali templates facilitated the assemblies of three new Pb-MOFs: [Pb2(pia)2(DMA)]·DMA (1), [Pb2(pia)2(DMF)]·1.5DMF (2), and [Pb2(pia)2(DMF)]·NEt3 (3). They were rigid rod-spacer and double-walls frameworks, which possess defective dicubane [Pb4O6] based metal-carboxyl chains constructed from both semidirected and holodirected Pb2+ ions. These MOFs exhibited thermal stability up to 370 °C and unprecedented chemical stability in H2O and acidic (pH 2) and alkaline (pH 12) aqueous solutions, found for the first time in Pb-MOFs. A single-phase and rare-earth-free white-emitting phosphor, 1, was screen out, which showed a near-sunlight and human-vision-friendly broadband spectrum covering the full visible region, possessing the close-to-pure-white chromaticity coordinates of (0.332, 0.347), a near-daylight color temperature of 5696 K, and a high color rendering index of 95. The replacement of DMF as apical ligand and guest in 2 resulted in an intrinsic single and narrow emission at 562 nm with yellow color. The convenient yellow-and-blue color-tuning until white for 2 was realized by either solution or solid blending with blue-emissive H2pia, benefited from their highly matched excitation spectra. Using large NEt3 as template guest induced great framework distortion for 3 and led to white emission with chromaticity coordinates of (0.302, 0.294), stemming from nonequivalent dual emission at 450 and 545 nm. In-depth structure analysis revealed intra-/interchain Pb···Pb interactions in the lead(II)-carboxyl chains greatly affected the photochemical output.
研究领域:
材料科学
·
光学
·
无机化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Bo Yu,Zhiwei Xu,Hualin Liu,Yumeng Liu,Kanghua Ye,Zhiquan Ke,Jiankai Zhang,Huangzhong Yu
Despite the fact that perovskite solar cells (PSCs) are widely popular due to their superb power conversion efficiency (PCE), their further applications are still restricted by low stability and high-density defects. Especially, the weak binding and ion–electron properties of perovskite crystals make them susceptible to moisture attack under environmental stress. Herein, we report an overall sulfidation strategy via introduction of 1-pentanethiol (PT) into the perovskite film to inhibit bulk defects and stabilize Pb ions. It has been confirmed that the thiol groups in PT can stabilize uncoordinated Pb ions and passivate iodine vacancy defects by forming strong Pb–S bonds, thus reducing nonradiative recombination. Moreover, the favorable passivation process also optimizes the energy-level arrangement, induces better perovskite crystallization, and enhances the charge extraction in the full solar cells. Consequently, the PT-modified inverted device delivers a champion PCE of 22.46%, which is superior to that of the control device (20.21%). More importantly, the PT-modified device retains 91.5% of its initial PCE after storage in air for 1600 h and over 85% of its initial PCE after heating at 85 °C for 800 h. This work provides a new perspective to simultaneously improve the performance and stability of PSCs to satisfy their commercial applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）