JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 8
·1-9
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IF 2.8
Peng Yanyan,Jiang Dayong,Zhao Man
The recent trend of combining perovskite with other materials to enhance optoelectronic performance has garnered significant interest. In this paper, MAPb 0.9 Sn 0.1 I 3 and ZnO–MAPb 0.9 Sn 0.1 I 3 photodetector were prepared by frequency magnetron sputtering and sol–gel spin-coating method. Hybrid heterojunction photodetectors have more beneficial optoelectronic performance compared to MAPb 0.9 Sn 0.1 I 3 photodetector, due to the presence of built-in electric fields, which can suppress the recombination of electrons and holes. At 7 V bias conditions, the responsivities of MAPb 0.9 Sn 0.1 I 3 photodetector were 0.022 and 0.015 A/W, and the responsivities of ZnO–MAPb 0.9 Sn 0.1 I 3 photodetector were 0.39 and 0.99 A/W obtained under 350 and 850 nm illumination, respectively. The maximum external quantum efficiency reaches 144.47%, the detection rate was 5.53 × 10 11 Jones and the light to dark ratio was 2.95 × 10 3 of ZnO–MAPb 0.9 Sn 0.1 I 3 photodetector. This study provides a basis for the preparation of perovskite heterojunction photodetectors with high optoelectronic performance. High performance UV–vis–NIR photodetectors based on ZnO/organic–inorganic hybrid Sn–Pb hybrid perovskite heterojunction.
研究领域:
材料科学
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光电子学
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半导体物理
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Ruike Wang,Mingzhi Yang,Yingying Wu,Rundong Liu,Mengchen Liu,Qiong Li,Xiao Su,Yongjuan Xin,Wenqian Huo,Qihong Deng,Yue Ba,Hui Huang
To investigate the mechanism of Silent information regulator 1 (SIRT1) regulation of DNA methylation and thus the expression of synaptic plasticity-related genes induced by lead (Pb) exposure, the early-life Sprague-Dawley rats and PC12 cells were used to establish Pb exposure models and treated with SIRT1 agonists (resveratrol and SRT1720). In vivo results demonstrated that Pb exposure increased the expression of DNMTs, MeCP2, PP1 and cleaved caspase3, decreased the expression of SIRT1, BDNF and RELIN and altered DNA methylation levels of synaptic plasticity genes. Moreover, we observed marked pathological damage in the hippocampal CA1 region of the 0.2 % Pb-exposure group. After treatment with resveratrol, the effects of Pb exposure on the expression of the above molecules and pathological features were significantly ameliorated in the hippocampus of rats. In vitro results showed that after the treatment with SRT1720, the expression of SIRT1 was activated and thus reversed the effect on DNMTs, MeCP2, apoptosis and synaptic plasticity-related genes and their DNA methylation levels induced by Pb exposure. In conclusion, we validated the important protective role of SIRT1 in neurotoxicity induced by Pb exposure through in vivo and in vitro experiments, providing potential therapeutic targets for the treatment and prevention of brain damage.
研究领域:
神经科学
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分子生物学
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毒理学
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Yanfei Liu,Juan Li,Shaowen Huang,Dingbo Shu,Yanru Shan,Zhuohao Qiao,Xiaogang Yin
To address the heavy metal water pollution caused by industrial wastewater discharge, a novel hydrogel adsorbent was prepared using organic matter derived from distiller's grains (DGS), a by-product of the brewing industry, as the main raw material and carboxymethyl chitosan (CMCS) as the modifier. Characterization results revealed that CMCS converted the adsorbent into a three-dimensional macroporous structure while enhancing its highly selective adsorption performance for Pb(II) and Cd(II), with adsorption capacities reaching as high as 825.3 mg·g −1 and 644.3 mg·g −1 , respectively, and removal efficiencies up to 99.4% and 95.2% within 10 min. The adsorption process fitted well with the pseudo-second-order adsorption kinetic model (R 2 > 0.996) and the Langmuir isotherm model, indicating that the adsorption was dominated by chemical adsorption. Mechanistic analysis revealed that the hydrogel formed complexation and coordination with Pb(II) and Cd(II) via the lone pair electrons of O and N atoms, and combined with hydrogen bonding and electrostatic attraction to achieve synergistic adsorption. Furthermore, adsorption experiments on industrial wastewater using this adsorbent demonstrated that it maintained excellent adsorption performance even after six adsorption-desorption cycles, and achieved a degradation rate of 51.3% after 28 days. The synthesis of this highly efficient adsorbent not only realizes the functional modification and high-value utilization of DGS but also provides a green solution for wastewater remediation, exhibiting great application potential.
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Materials
·
2023
·Vol. 16
·期 23
·7470
·
IF 3.4
Yanling Yuan,Ling Gao,Naixin Li,Jiuning Gao,Yu Yan,Yiming Zhao,Zongqiang Ren,Hongxin Gong,Yunfei Zhang,Yongbin Liu,Ming Wu,Lisheng Zhong
Piezoelectric thin films grown on a mechanical, flexible mica substrate have gained significant attention for their ability to convert mechanical deformation into electrical energy though a curved surface. To extract the generated charge from the PZT thin films, bottom electrodes are typically grown on mica substrates. However, this bottom electrode also serves as a buffering layer for the growth of PZT films, and its impact on the piezoelectric properties of PZT thin films remains understudied. In this work, the effect of Pt and LaNiO3bottom electrodes on the piezoelectric effect of a Pb(Zr0.52,Ti0.48)O3thin film was investigated. It was observed that the PZT thin films on LNO/Mica substrate possessed weaker stress, stronger (100) preferred orientation, and higher remanent polarization, which is beneficial for a higher piezoelectric response theoretically. However, due to insufficient grain growth resulting in more inactive grain boundaries and lattice imperfections, the piezoelectric coefficient of the PZT thin film on LNO/Mica was smaller than that of the PZT thin film on a Pt/Mica substrate. Therefore, it is concluded that, under the current experimental conditions, PZT films grown with Pt as the bottom electrode are better suited for applications in flexible piezoelectric sensor devices. However, when using LNO as the bottom electrode, it is possible to optimize the grain size of PZT films by adjusting the sample preparation process to achieve piezoelectric performance exceeding that of the PZT/Pt/Mica samples.Keywords:PZT;piezoelectric effect;flexible sensor;ferroelectric thin film
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yueyang Wang,Fangfen Jing,Mingzhu Jin,Weiwei Lu,Shanshan Zeng,Yaling Zeng,Jianchao Xie,Rongtai Yu
Adsorption is recognized as a cost-effective, efficient, and versatile method for the treatment of heavy metal pollution, offering environmentally friendly solutions. The development of highly efficient and selective adsorbent materials is essential, with functional groups such as sulfhydryl and amine groups playing a crucial role in the effectiveness and selectivity of adsorption processes. Polymer-based materials have emerged as a promising class of selective adsorbents due to their naturally occurring amine groups. In this study, a bifunctional adsorbent with a concave morphology was developed by grafting sulfhydryl groups to selectively adsorb As(III) and Pb(II) from aqueous solutions. Maximum adsorption capacities for As(III) and Pb(II) were found to be 165.51 mg g −1 and 62.38 mg g −1 , respectively, at an optimum dosage of 0.05 mg mL −1 and an original concentration of 20 mg L −1 for both metals. Notably, the concave spheres exhibited superior morphology advantages for As(III) and Pb(II) adsorption compared to hollow and solid polymers, with adsorption capacities 1.8 times higher than hollow polymers and 3.7 times higher than solid spheres for As(III) adsorption, and 3.4 times higher than solid spheres for Pb(II) adsorption. Mechanistic studies revealed that the selective capture of As(III) was primarily attributed to the proposed reaction routes between As(III) and -SH groups. Isothermal models, including Langmuir and Freundlich, suggested that monolayer adsorption on homogeneous surfaces may dominate for As(III), while multilayer adsorption is favored for Pb(II) extraction.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
PeiPei Li,RenChun Fu,Du Jun,Hui Huang,ZhongCheng Guo
The nature of the electrode surface plays an important role in the electrode reaction. In this study, Pb- Ag alloy anodes modified with polyaniline films were prepared by galvanostatic polymerisation. Linear scanning voltammetry (LSV), cyclic voltammetry and potentiodynamic polarisation were measured and compared with those of unprepared Pb-Ag (0.3 wt%) alloy anodes. The oxygen evolution reaction potential of the modified anodes was lower than that of the unprepared Pb-Ag (0.3 wt%) anode at same anodic current density. The corrosion resistance of the modified anode was better than that of the unprepared Pb-Ag (0.3 wt%) anode. SEM images were obtained to characterise the morphology of the polyaniline film, and FTIR spectra confirmed that the film coating the Pb-Ag alloy was polyaniline.
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Small
·
2023
·Vol. 19
·期 20
·2207480
·
IF 13.3
Yuli Tao,Zheng Liang,Jiajiu Ye,Huifen Xu,Guozhen Liu,Dmitry Aldakov,Xu Pan,Peter Reiss,Xingyou Tian
Mixed lead-tin (Pb Sn) perovskite solar cells (PSCs) possess low toxicity and adjustable bandgap for both single-junction and all-perovskite tandem solar cells. However, the performance of mixed Pb Sn PSCs still lags behind the theoretical efficiency. The uncontrollable crystallization and the resulting structural defect are important reasons. Here, the bidirectional anions gathering strategy (BAG) is reported by using Methylammonium acetate (MAAc) and Methylammonium thiocyanate (MASCN) as perovskite bulk additives, which Ac − escapes from the perovskite film top surface while SCN − gathers at the perovskite film bottom in the crystallization process. After the optoelectronic techniques, the bidirectional anions movement caused by the top-down gradient crystallization is demonstrated. The layer-by-layer crystallization can collect anions in the next layer and gather at the broader, enabling a controllable crystallization process, thus getting a high-quality perovskite film with better phase crystallinity and lower defect concentration. As a result, PSCs treated by the BAG strategy exhibit outstanding photovoltaic and electroluminescent performance with a champion efficiency of 22.14%. Additionally, it demonstrates excellent long-term stability, which retains ≈92.8% of its initial efficiency after 4000 h aging test in the N 2 glove box.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Jing Yu,Shukui Zhu,Pin Chen,Gang-Tian Zhu,Xiangtao Jiang,Siyuan Di
Core-shell porphyrin-based magnetic nanocomposites with multi-functional groups were synthesized and used as effective adsorbents and crystal nuclei for removing Pb(II) from water. The effect of initial Pb(II) concentration ( C 0 ), equilibrium time and experimental temperature on the adsorption capacity has been investigated. Under the optimized conditions, the removal rate of Pb(II) can reach 84.3% only within 5 min, more efficient than similar adsorbents. In addition, the maximum adsorption capacity of FST is up to 798.34 mg/g, which is much higher than previously reported results for removing Pb(II) in aqueous solution. Furthermore, the adsorption mechanisms were proposed based on the results of field emission scanning electron microscopy (FE-SEM), ultraviolet-visible spectroscopy (UV–vis) and X-ray diffraction tests. The adsorption processes could be well described by pseudo-second-order kinetic model regardless of C 0 . However, when C 0 was <19.2 mg/L, the adsorption process was a favorable monolayer interaction, controlled by the coordination between Pb(II) and porphyrin . When the C 0 was at the range of 19.2–512 mg/L, adsorption was multilayer interaction, and the process was controlled by crystallization and limiting solubility. Moreover, density functional theory (DFT) calculations have been used to study the optimal functional group towards Pb(II), which revealed that the adsorbability of tetrapyrrolic core to Pb(II) was better than that of NH, C O and Si O Si in porphyrin. This study provides a facile method for removal of Pb(II) from aqueous solutions and offers theoretical and practical guidance on new adsorbent designs for selective removal of heavy metal ions .
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2019
·
IF 3.218
Qin Lei,Yu Wang,Wanxin Dong,Haitao Sun,Jiaxin Lv,He Li
Herein, we used Prussian blue (PB) as an indicator for self-powered electrochromic visual sensing driven by photoelectrochemical (PEC) cell to detect prostate specific antigen (PSA). The sensor consists of a photoanode and a PB/ITO cathode. Under the visible light excitation, photoelectrons generated from the photoanode will transmit to PB through an external circuit, making the blue PB reduced to transparent Prussian white (PW). In the presence of PSA, the transfer rates of photoelectrons slow due to steric hindrance , leading to different fading degree of PB. Moreover, the color intensity of PB is proportional to the concentration of PSA, we can quantitatively detect the PSA according to the color intensity. Under the optimal conditions, the linear range of detecting PSA was 0.1–50 ng/mL with the detection limit of 0.03 ng/mL (S/N = 3). Meanwhile, the prepared novel sensing platform exhibited great selectivity and provided a rapid, visual method for PSA detection in human serum, which has great application prospects in point-of-care (POC) diagnostics.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Huanghui Nie,Limei Ruan,Lu Hu,Xinran Wang,Fukang Chen,Shuai Zhou,Yangyang Wang,Taotao Ai,Yan Yan,Gang Liu
(1- x ) (0.98Na 0.5 Bi 0.5 TiO 3 –0.01BaTiO 3 –0.01BiFeO 3 )– x CaTiO 3 (NBB- x CT) ceramics were produced using traditional solid-state synthesis methods. The surface morphology , domain structure, and electrical properties of the ceramic samples were systematically studied. In addition, the temperature and frequency stabilities of the NBB-15CT sample at 200 kV/cm were tested. Generally, NBB- x CT ceramics exhibit a typical single perovskite phase structure. The results indicate that the NBB-15CT ceramics showed a high energy density of 3.14 J/cm 3 at 250 kV/cm. The piezoresponse force microscopy (PFM) results showed that the addition of CT broke the macrodomains of the 0.98Na 0.5 Bi 0.5 TiO 3 -0.01BaTiO 3 -0.01BiFeO 3 ceramic and helped to form nanodomains, leading to an improved energy storage performance. The above performance indicates that the specimens possess very good temperature-and frequency-dependent energy storage performances at 30–150 °C and 1–100 Hz. Moreover, the electric energy storage and release in the NBB-15CT ceramic indicated that the power density could reach 55.30 MV/cm 3 at 180 kV/cm. Therefore, the NBB-15CT ceramic is a promising material for electrical capacitors.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Yanzhao Shi,Xueying Ren,Hong Zheng,Yu Zhang,Qi Zuo
The removal of lead in drinking water has attracted considerable attention of researchers in recent years, especially, the trace characteristic of lead is a challenge to water treatment. Herein, 13X zeolite/reduced graphene oxide composite material (13X-rGO) with hierarchically porous structure was successfully prepared using graphene oxide (GO) and 13X zeolite via a chemical reduction method and presented great performance for removing trace Pb(II) from drinking water. The influence of some important parameters including adsorbent dosage, contact time, initial lead concentration, coexisting competing ions, solution pH value, etc. on the removal of Pb(II) was systematically investigated. The composite material showed better adsorption properties compared with a single component and their physical mixture, confirming the synergistic effect of rGO and 13X zeolite on Pb(II) adsorption. The effluent lead concentration could be decreased to the level permitted by World Health Organization (WHO) (<10 ppb) within 30 s under calcium content of 20 ppm and initial lead concentration of 150 ppb. Simultaneously, the as-prepared 13X-rGO performed excellent adsorption capacity meeting WHO standard (6.07 mg/g), which was about 2.23 times that of single 13X zeolite (2.72 mg/g). In the presence of interfering ions, the lead concentration could still be reduced to safe drinking water standard. Moreover, the adsorbent could be effectively regenerated by saturated sodium chloride solution. Therefore, 13X-rGO can be introduced as a promising adsorption material for the purification of drinking water contaminated with trace lead owing to rapid adsorption, low cost and recycling potential.
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JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Yuehui Tan,Xirui Wan,Ting Zhou,Le Wang,Xianqiang Yin,Aisheng Ma,Nong Wang
In this study, a novel adsorbent made from kiwi branch biochar modified with Zn-Fe (KB/Zn-Fe) was compared with original biochar to the Pb(II)'s adsorptivity from waste water. The adsorbent was synthetized by liquid-phase deposition. Batches of sorption tests were performed, and the biochars' representative properties were tested. Characterizations revealed the physicochemical properties of biochars and showed that the KB/Zn-Fe composites were successfully synthesized. The Langmuir model and pseudo-second-order kinetic model were proven to satisfactorily fit the original biochar and KB/Zn-Fe. The KB/Zn-Fe showed Langmuir maximum adsorption ability to Pb (II) in aqueous solution of 161.29 mg g -1 , compared with 36.76 mg g -1 for original biochar. The adsorption ability of Pb(II) decreased and the Pb(II) removal efficiency increased with increasing biochar dose. The effect of co-existence of NO 3 - to the absorptive capacity of KB/Zn-Fe on Pb(II) was unremarkable, but Cl - could increase the absorptive capacity. Multiple Pb(II) adsorption mechanisms by KB/Zn-Fe include surface precipitation of metal hydroxides, complexation with active functional groups and ion-exchange. This work provides guidance for future production of biochar with efficient adsorption ability, which could be used to remove Pb(II) ions from wastewater.
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