APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
·
IF 20.2
Jiejing Kong,Miaoqiu Tang,Yujia Luo,Shengnan Song,Ziwei Xiang,Yunlong Guo,Weiping Zhang,Guiying Li,Taicheng An
The trade-off between high visible-light response quantum yields and strong redox activity to achieve effective overall photocatalytic performance is still challengeable in the field of photocatalytic application. Herein, S-scheme heterojunction catalyst with high redox potential was developed by introducing small amount of Pt and excessive Bi into Bi 2 WO 6 /CeO 2 (denoted as BWO/CeO 2 ) through simple hydrothermal method, and applied to efficiently photocatalytic degradation of typical VOCs containing soot under visible light. It is experimentally proven that photogenerated charge transfer follows an S-scheme mechanism with interfacial Bi as a charge-transfer bridge and surface-deposited Pt as a photoexcited-electron trapper, which not only promotes charge separation but also enhances redox activity. Besides, both surface plasmon resonance of Bi nanoparticles and photothermal effect of soot trigger pyroelectric polarization of BWO to boost charge generation and separation, meanwhile induce photothermal synergistic effect of Pt/Bi-BWO/CeO 2 . All these beneficial factors lead to remarkably higher photocatalytic activity of Pt/Bi-BWO/CeO 2 catalyst in comparison with single component of photocatalysts, with higher reaction rate constant of 2.3 times than BWO/CeO 2 and 20.2 times than commercial CeO 2 . This work provides a visible photocatalytic strategy to efficiently purify VOCs containing soot, while perfectly transform soot pollutant into a valuable cocatalyst during catalytic processes.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Pengwei Jia,Yuanliang Li,Zhanshen Zheng,Yun Liu,Yan Wang,Tong Liu
The improved separation efficiency of photogenerated electrons and holes is an effective way to improve photocatalytic performance. Herein, the high efficiency sheet/fiber g-C 3 N 4 /BaTiO 3 photocatalysts with built-in electric field are successfully synthesized by electrospinning and simple calcination method. Compared with pure g-C 3 N 4 and BaTiO 3 , g-C 3 N 4 /BaTiO 3 heterojunction possesses higher photogenerated electron-hole pairs separation efficiency and larger specific surface area, thus improving the photocatalytic activity of g-C 3 N 4 /BaTiO 3 catalysts. Besides, the ferroelectric polarization produced by external electric field significantly promotes the CO 2 reduction performance of CNBT20 [the component with mass fractions BT / (CN/BT) = 20 %], whose reduction rates of CH 3 OH and CH 3 CH 2 OH are 1.44 and 1.50 times that of unpolarized CNBT20, accompanied with remarkable cyclic stability. The coupling effect of heterojunction and ferroelectric polarization improves the separation efficiency of photoexcited carriers in g-C 3 N 4 /BaTiO 3 significantly, hence providing broad prospects for the combination of traditional semiconductors and ferroelectric materials to improve photocatalytic performance.
研究领域:
材料科学
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环境科学
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化学
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纳米技术
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催化
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Ping-Jui Su,Yi-Hua Lin,Chih-Chia Cheng,Chien-Hsing Lu,Jem-Kun Chen
Branched polyethyleneimines (bPEI) were dual-crosslinked with 1,4-butanediol diglycidyl ether and tetrakis(hydroxymethyl)phosphonium chloride to form the molecularly imprinted (MIP) layer for bilirubin. Core/shell-structured membranes (PEO/MIP) with bilirubin-philic cavities were obtained using coaxial electrospinning. Electric polarization (EP) induced the separation of positive and negative charges in the membranes, thereby improving adsorption efficiency. The PEO/MIP was placed between two steel meshes to generate an alternating current electric field (ACEF) during bilirubin adsorption. The maximum adsorption capacity of bilirubin on PEO/MIP increased significantly from 136.99 to 208.33 mg/g when the membranes were subjected to an ACEF at 150 kHz and 2.5 V. The adsorption rate constant of bilirubin on PEO/MIP was also enhanced under EP. Due to the dynamic electrostatic force, the imprinting factor of PEO/MIP in the presence of ACEF was 25 % higher than that in its absence. At 1200 kHz, however, the maximum adsorption capacity of bilirubin on PEO/MIP decreased to 39.4 mg/g because of energy dissipation, which facilitated desorption from the recognition sites. The PEO/MIP could be reused 12 times under polarization switching frequencies ranging from 150 to 1200 kHz, exhibiting low damage and high stability. These results demonstrate that ACEF frequency can manipulate the adsorption behavior of bilirubin, enabling both enhanced bilirubin adsorption and efficient reuse of PEO/MIP.
研究领域:
生物医学工程
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高分子科学
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纳米技术
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膜技术
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生物分离
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wangchuan Zhu,Chuantao Wang,Xiang Li,Wenhui Shi,Qiyu Chen,Xinlei Bai,Feng Fu,Danjun Wang,Chunming Yang
Advanced oxidation processes based on piezo-promoted peroxymonosulfate (PMS) activation in environmental remediation have been widely applied, but the treatment efficiency of pollutants was restricted by sluggish charge separation and low affinity of PMS. Herein, trace iron-doped layered molybdenum disulfide (Fe/MoS 2 ) was used to degrade pollutants by piezo-promoted PMS activation. Real-time reaction site changes in carbamazepine (CBZ) degradation process were predicted by Fukui function calculation of the reaction intermediates, and the possible degradation pathways were given. Through piezoresponse force microscopy and calculation of the adsorption energy, electronic localized functions and Crystal Orbital Hamilton Population, it was verified that Fe doping improves the adsorption of oxygen-containing reactants on MoS 2 , enhancing the electron delocalization and piezo-polarization field, thus accelerating the piezo-promoted PMS activation kinetics. The degradation efficiency of CBZ on Fe/MoS 2 (0.44 min −1 ) was about 22 times than that of MoS 2 . Piezo-promoted PMS activation strategy based on Fe/MoS 2 still maintains a high removal rate in the treatment of dye and antibiotic pollutants such as ornidazole, rhodamine B, tetracycline, methyl orange, chlortetracycline. This study provides insights into the mechanism by which piezo-promoted PMS activation, and achieving high chemical efficiency for pollutants removal.
研究领域:
环境科学
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化学工程
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材料科学
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高级氧化过程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Wenhao Yu,Yaojie Liu,Mo Xian,Ximin Chen,Zongjiang Yu,Long Jiang,Chao Xu
Surface molecular-imprinting is an efficient and eco-friendly route to resource recovery. Yet most studies prioritize template–monomer affinity and seldom integrate radical-polymerization characteristics upfront, risking an affinity–performance gap. Using phloroglucinol (PG) as a model, a 3D “binding energy–SOMO/LUMO gap–steric hindrance” screening framework is established that identifies N-vinylimidazole (VIM) for matrix grafting and 2-(dimethylamino)ethyl methacrylate (DMAEMA) for imprinting. Surface radical polymerization on VIM-grafted chloromethylated polystyrene with DMAEMA (imprinting monomer) and PG (template) affords CMPS-VIM-MIP. The material exhibits an equilibrium adsorption capacity of 118.4 mg g −1 , 2.6 times that of the commercial resin NKA-II (45.5 mg g −1 ). In the fermentation system, the capacity decreases by 19.9% yet remains 4.0 times that of NKA-II. Mechanistic analysis reveals that imidazolium sites induce long-range electrostatic polarization, while multiple hydrogen bonds between the polymer's carbonyl/tertiary-amine groups and the hydroxyl groups of PG, act cooperatively to form high-affinity imprinting cavities. This multidimensional co-screening of functional monomers delivers concurrent gains in adsorption performance and offers a generalizable route for the green recovery of high-value phenolics.
研究领域:
环境化学
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高分子科学
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吸附技术
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绿色资源回收
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分子识别
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Qing-rui Zeng,Zi-ang Jia,Xu Liu,Bo-wen Xiu,Jin-ping Cheng
The rational application of piezoelectric polarization properties in non-centrosymmetric heterojunctions to improve charge separation efficiency is a novel approach for enhancing their photoelectrocatalytic capabilities for environmental purification. Herein, a noval 1T-2H MoS 2 QDs/Y-NaBi(MoO 4 ) 2 multiple heterostructures with two types S-scheme heterojunctions was formed by multi-functional materials NaBi(MoO 4 ) 2 with Y 3+ ion-doping and multi-phase state (1T, 2H and 1T-2H) MoS 2 quantum dots multi-interface polarization engineering. Material characterization and DFT calculations revealed that 1T-2H MoS 2 QDs/Y-NaBi(MoO 4 ) 2 multiple heterostructures produce highly-efficient Bi-S-Mo(IV) and Mo(IV)-S-Mo(VI) charge-transfer channels induced by multi-interface polarization engineering. 1T-2H MoS 2 QDs/Y-NaBi(MoO 4 ) 2 heterostructures were developed as photoanodes using the pressed tablet stainless-steel mesh (PT-SSM) method, and demonstrated conspicuous piezoelectric-photoelectrocatalytic (PZ-PEC) efficiency (99.88% removal within 40 min) for the degradation of organic pollutant phosphodiesterase-5 inhibitor (PDE-5i) under visible light illumination, direct-current external bias and mechanical force. This work provides new insight for synergy and mechanism between piezoelectric effect and photoelectrocatalysis for environmental clean-up.
研究领域:
材料科学
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环境科学
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电化学
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纳米技术
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催化
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2024
·Vol. 135
·期 13
·
IF 2.7
Zhang Jiahui,Zhang Guangchao,Hou De,Bi Jiachang,Zhang Ruyi,Peng Shaoqin,Yu Pengfei,Zhu Fangyuan,Liu Haigang,Wu Liang,Sheng Zhigao,Du Juan,Cao Yanwei
Element substitution of BaTiO 3 -based compounds has been demonstrated as a powerful way for designing novel electronic materials (such as polar metals and multiferroics). To trigger magnetism into ferroelectric BaTiO 3 , general substituted elements are magnetic transition metals (such as Mn, Fe, and Co). The doping effect of rare-earth elements (such as Dy) in BaTiO 3 -based compounds was barely investigated. Here, we report the coexistence of magnetism and electric polarization in epitaxial Dy 0.5 Ba 0.5 TiO 3 films. The single-crystalline films were synthesized by high-pressure magnetron sputtering. The crystal and electronic structures were characterized by high-resolution x-ray diffraction, x-ray photoemission spectroscopy, and resonant soft x-ray absorption spectroscopy. Room-temperature electric polarization was demonstrated by optical second-harmonic generation. Temperature-dependent magnetic hysteresis loops were measured to reveal the revolution of magnetism on temperature. Surprisingly, it is uncovered that the Curie temperature of electric-polarized Dy 0.5 Ba 0.5 TiO 3 films is around 100 K, far above the critical temperature of non-polarized DyTiO 3 (near 60 K). Our work provides another view to understand the magnetoelectric materials.
研究领域:
材料科学
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凝聚态物理
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电磁学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 2
·740-751
·
IF 12.732
Lichong Peng,Yaxin Sun,Shiquan Guo,Congju Li
Oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) involve proton coupled electron transfer reaction (PCET), resulting in sluggish redox kinetics. At present, the development of high-efficiency bifunctional oxygen electrocatalysts is still a puzzling challenge. Herein, we propose a scalable strategy for embedding and beading ZIF-derived hollow Co–Nx nanocube cage dispersion implanted with porous carbonized nanofibers (EH/PCNFs and BH/PCNFs) through electrospinning and annealing. The cobalt species prevent themselves from agglomerating during the annealing process through the “fence” effect of the non-volatile Zn species, thereby synergizing with ligand volatilization to facilitate the formation of Co–Nx nanocube cages. Benefiting from the ultralong interconnected multi-layered carbon nanofiber matrix, the hollow Co–Nx nanocube cages can change the charge density and electron distribution of the carbon nanofiber matrix, endowing the carbonized nanofiber carrier with special surface polarization and accelerating the electrocatalytic kinetics. Remarkably, the integrated Li–O2 batteries (LOBs) based on BH/PCNFs and EH/PCNFs electrodes exhibit significantly decreased charge/discharge polarization (0.79 V) and a long-term cyclability (147 cycles) under a cut off capacity of 500 mA h g−1 at 200 mA g−1. This work might be beneficial for the practically viable design and manufacture of dual-function oxygen electrocatalysts.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Zhe-Kun Xu,Xian-Jiang Song,Yan Qin,Peng-Fei Li,Xiao-Gang Chen,Yuan-Yuan Tang,Ren-Gen Xiong,Hui-Peng Lv
Ferroelectric crystals possess essential properties for a wide array of applications, while their inherent brittleness presents significant challenges in smart scenarios that demand high flexibility and customizable shapes. Herein, an aminoborane adduct ferroelectric molecular crystal, trimethylamine chloroborane (TMACB), is synthesized, showing room-temperature metal-like malleability and ductility. TMACB crystallizes in rhombohedral R 3 m space group at room temperature and undergoes structural phase transition to monoclinic Cc space group at 256 K. The compressive strain of TMACB single crystal can reach ≈94% before fracture, more than 16 times that of traditional inorganic ferroelectrics (less than 6% in general), and large ultimate tensile strain of 15.6% can also be achieved. Both polarization-electric field hysteresis loop and piezoresponse force microscopy characterizations have demonstrated ferroelectricity of TMACB, which is further firmly supported by density functional theory calculation. Moreover, compressed thin sheet of TMACB crystal maintains promising ferroelectric performance with a large polarization value of 23.9 microcoulomb per square centimeter, close to that of inorganic ferroelectric BaTiO 3 . The discovery breaks through the research paradigm of brittle ferroelectric materials and offers new insights into the exploration of highly deformable ferroelectric crystals for flexible wearable devices and adaptable sensor arrays in the future.
研究领域:
材料科学
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铁电学
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柔性电子学
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晶体工程
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功能材料
✓ 已验证
DOI
PubMed
高影响因子
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