APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qihuang Deng,Furong Zhou,Maolin Bo,Yefeng Feng,Yuehao Huang,Cheng Peng
High dielectric response and electric insulation are desired in high-energy-density polymer/ceramic composites. Low dielectric response is found in polymer composites with semiconductors. To balance a high dielectric constant and breakdown strength, in this work, the polymer-based composites with de novo synthesized V 2 C MXene-CuO hybrid-particles were fabricated. High dielectric response of composites was attributed to strong electron polarization at ceramic/ceramic heterojunction. High insulation was ascribed to fluorine-induced electron-trap effect. The first principle calculations verified the electron-transfer mechanism at V 2 C/CuO van der Waals heterojunctions. Compared with polymer/CuO binary composites, polymer/V 2 C-CuO ternary composites exhibited the improved comprehensive electric properties (remarkably improved dielectric response and slightly damaged insulation). Ternary composite with 10 wt% V 2 C-CuO showed a high dielectric constant of 89, low dielectric loss of 0.23, low conductivity of 6.8 × 10 −7 S m −1 at 100 Hz and high breakdown strength of 204 MV m −1 . This study might enable a facile preparation of cutting-edge nanocomposite dielectrics.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2020
·
IF 6.146
Jinjun Peng,Jun Shen,Xiaohui Yu,Hua Tang,Zulfiqar,Qinqin Liu
Plasmonic nonmetal semiconductors with localized surface plasmon resonance (LSPR) effects possess extended light-response ranges and can act as highly efficient H 2 generation photocatalysts. Herein, an LSPR-enhanced 0D/2D CdS/MoO 3− x heterojunction has been synthesized by the growth of 0D CdS nanoparticles on 2D plasmonic MoO 3− x elliptical nanosheets via a simple coprecipitation method. Taking advantage of the LSPR effect of the MoO 3− x elliptical nanosheets, the light absorption of the CdS/MoO 3− x heterojunction was extended from 600 nm to the near-infrared region (1400 nm). Furthermore, the introduction of 2D plasmonic MoO 3− x elliptical nanosheets not only provided a platform for the growth of CdS nanoparticles, but also contributed to the construction of an LSPR-enhanced S-scheme structure due to the interface between the MoO 3− x and CdS, accelerating the separation of light-induced electrons and holes. Therefore, the CdS/MoO 3− x heterojunction exhibited higher photocatalytic H 2 generation activity than pristine CdS under visible light irradiation, including under 420, 450, 550, and 650 nm monochromic light, as well as improved photo-corrosion performance.
研究领域:
材料科学
·
光催化
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高影响因子
Gas Science and Engineering
·
2024
·
IF 0
Mingnv Guo,Jiahao Liu,Jiaqi Qiu,Ziqi Wang,Zhongqing Yang
The main influencing factor in photothermal catalytic reduction of CO 2 is carrier migration limitation. To further enhance the carrier transport rate, iodide-modified Bi 2 MoO 6 quantum dots (BMO QDs) were constructed and deposited on a monolayer of reduced graphene oxide surface (rGO) to construct a BMO-I QDs/rGO heterojunction . Quantum dots have short carrier migration distances due to their ultra-small bulk phase thickness, allowing carrier migration to occur quickly and electron-hole complexation to be reduced. rGO heterojunction can promote the formation of thin stacked structures in BMO-I QDs and a photothermal conversion temperature of 74. 6 °C. The rGO and BMO-I QDs can form a C–I–Bi interfacial electron bridge, and the I - playing transport channel provides a bridge for carrier interfacial transport, which enables the electrons in the BMO QDs to migrate to the surface of the rGO, formation of an electron cloud on the rGO for rapid catalytic reduction of CO 2 , and the CO production on BMO-I QDs/5rGO was 2.02 times higher than that on BMO-I QDs. The construction of heterojunctions is demonstrated to accelerate CO 2 cleavage and CO desorption by DFT calculations of CO 2 adsorption, electronic energy band structure and density of states.
研究领域:
材料科学
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环境科学
·
化学工程
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yunlong Lan,Chao Deng,Qiaoping Kong,Chuanxi Yang,Bingrui Ma,Erling Zhao,Xiaoning Wang,Yongkun Wu,Liping Xiao
Nowadays, industrial wastewater contains abundant refractory organic pollutants, which seriously threaten ecological environment and human health. As an eco-friendly and efficient technology, photocatalysis is a promising approach for wastewater purification. Nevertheless, the rapid recombination of photogenerated carriers greatly limits the practical application of conventional photocatalysts. Introducing oxygen vacancies (OVs) into photocatalysts is an effective strategy to solve this problem and improve photocatalytic activity. In this study, we facilely synthesized 0D/2D BiOBr-OVs/g-C 3 N 4 heterojunction by a one-pot solvothermal method, which was composed of zero-dimensional (0D) oxygen vacancy BiOBr-OVs and two-dimensional (2D) g-C 3 N 4 components. The 0D/2D heterojunction exhibited enhanced visible-light degradation for the hazardous pollutant 1-naphthoic acid. And its removal rate by 0D/2D composites was up to 76.3% after 100 min of irradiation, which was 1.61 and 1.45 times those of 2D g-C 3 N 4 and 0D BiOBr-OVs. The noticeably increased removal efficiency of 0D/2D composites for 1-naphthoic acid was attributed to the rational utilization of oxygen vacancies to promote charge carrier separation. And the tight bonding between components also contributed to photoinduced carrier migration and exerted a synergistic effect for photocatalysis. Possible degradation pathways were proposed for the intermediates via gas chromatography-mass spectrometry (GC-MS) qualitative analysis, and their toxicity was evaluated using the Toxicity Estimation Software Tool (T.E.S.T.). This paper provides an innovative approach for one-step manufacture of 0D/2D nanojunctions with oxygen vacancies, and advances to prospective organic photodegradation applications.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yujie Wu,Danrui Pan,Jinlin Yin,Shaoke Chen,Jin Wang,Ahmed Mahmoud Idris,Zhengquan Li
Designing compact heterojunctions with optimized light absorption and carrier separation is a promising approach to realizing economically viable CO 2 photoreduction, yet it requires intricate structural and electronic engineering. Herein, a compact 0D/2D heterojunction was constructed by growing CsPbBr 3 nanocrystals (NCs) in situ on ultrathin porous nanosheets of Ni-doped LaFeO 3 . The resulting Ni-doped LaFeO 3 /CsPbBr 3 heterojunction exhibits a broad light absorption range. Mechanistic investigations reveal that the charge transfer follows a direct Z-scheme mechanism, thereby enabling highly efficient charge separation and transport. As a result, the optimized LaFe 0.74 Ni 0.26 O 3 /CsPbBr 3 exhibited a remarkable CO yield of 49.5 μmol g −1 h −1 with an electron consumption rate of 107.8 μmol g −1 h −1 , which is twice that of its undoped heterojunction and 5.5 times higher than pristine CsPbBr 3 NCs, setting a new benchmark among reported solid–gas CO 2 reduction systems with visible light. This work highlights the synergistic benefits of heteroatom doping and heterojunction engineering in enhancing photocatalytic performance, offering valuable insights for the development of efficient photocatalysts for solar-driven CO 2 photoreduction.
研究领域:
光催化
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材料科学
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二氧化碳还原
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纳米材料
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能量转换
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DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Runze Feng,Mingnv Guo,Zhongqing Yang,Jiaqi Qiu,Ziqi Wang,Yongliang Zhao
The photothermal-catalyzed CO 2 reduction is severely limited by the low carrier transport capacity. In this paper, the in-situ construction of 0D/2D Bi 2 MoO 6 (BMO)/reduced Graphene Oxide (rGO) heterojunction was synthesized. The excellent photothermal conversion ability of rGO promotes the high dispersion of BMO quantum dots (QDs). The size of synthesized BMO QDs is about 4.26 nm and the temperature of the catalysts can quickly rise to 68.0 °C. XPS results show that the C–O–Bi interfacial electronic bridge between surface oxygen-containing groups and BMO QDs was successfully induced by modulating the degree of GO reduction. Electrons generated by BMO QDs migrate to the rGO surface rapidly, inducing rGO as a new electron-rich surface for rapid activation of CO 2 . The 1:5 BMO/rGO (NaBH 4 ) CO yield reaches 186.87 μmol/g, which is 4.64 times as much as BMO QDs.
研究领域:
材料科学
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环境科学
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高影响因子
Small
·
2022
·Vol. 18
·期 20
·2200178
·
IF 15.153
Lunjie Huang,Da-Wen Sun,Hongbin Pu
Metal-organic frameworks (MOFs) are a versatile toolbox for the bioinspired design of nanozymes for antibacterial applications and beyond, however, designing a nanozyme by the hierarchical quasi-MOF scheme remains largely unpracticed. This work exemplifies the preferential structure-activity correlation of a bimetallic quasi-MOF (Q-MOF Ce0.5 ) among three series of MOF-derived peroxidase (POD) mimics. The biomimetic quasi-MOF Ce0.5 nanosheets accommodate both oxygen vacancy-coupled multivalent redox cycles and photosensitive energy band layout, benefiting from the hierarchical heterojunction-like 0D/2D interface featuring isolated nodes-derived Ce O Cu sites upon the 2D decarboxylated MOF scaffold. These integrated unique merits enable the POD-like Q-MOF Ce0.5 to generate sustained reactive oxygen species to effectively eradicate the surface-adhered bacteria under visible light, resulting in significant inactivation of Escherichia coli (99.74 %) and Staphylococcus aureus (99.35%) in vitro, and potent disinfection of skin wounds in vivo in safe and on-demand manners. It is hoped that this work can intensify the interventions of MOF nanozymes against the microbial world.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yaru Hou,Fanyong Yan,Xinyi Bai,Xin Wei,Liang Chen,Yang Fu
Ti 3 C 2 T x MXene has demonstrated well-established sensitivity in electrochemical sensing but is susceptible to oxidation . Nitrogen-sulfur doped carbon dots (N, S-CDs) were functionalized on Ti 3 C 2 T x MXene nanosheets via a surface modification strategy, leading to significant enhancement in the performance of Ti 3 C 2 T x MXene. The incorporation of N, S-CDs into Ti 3 C 2 T x MXene nanosheets effectively prevents the aggregation of Ti 3 C 2 T x MXene flakes, resulting in improvement of the interlayer spacing to 1.578 nm and a threefold expansion of the specific surface area. Furthermore, the N, S-CDs contribute to increase the effective active surface area of the Ti 3 C 2 T x MXene electrode, facilitating accelerated the electron transfer rates and providing additional active sites. On this basis, a galvanic sensor for dopamine (DA) detection was attained through loading N, S-CDs/Ti 3 C 2 T x on glassy carbon electrodes. The optimized sensor achieved a linear detection range of 1 μM–1000 μM for DA, with a detection limit of 0.91 μM (S/N = 3). This work presents a promising approach for the utilization of chemically stable Ti 3 C 2 T x MXene and MXene-based sensors, offering a new avenue for quantitative detection of DA that holds potential for application in real sample analysis.
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Journal of Inorganic and Organometallic Polymers and Materials
·
2020
·Vol. 30
·期 12
·4954-4968
·
IF 1.941
Ding Tingting,Xiao Xinyan,Wang Yi,Lu Mingli
A novel 0D/2D Z-scheme AgI/Bi 24 O 31 Br 10 photocatalyst was prepared through the simple solvothermal and coprecipitation method, in which AgI nanoparticles were decorated on the surface of Bi 24 O 31 Br 10 nanosheets. The AgI/Bi 24 O 31 Br 10 composites exhibited improved photocatalytic activity for the degradation of rhodamine B (RhB) in comparison with pristine Bi 24 O 31 Br 10 and AgI under simulated sunlight irradiation. Specifically, AB-30 (mass fraction of AgI, 30%) composite exhibited remarkable photocatalytic activity of 97.6% towards RhB degradation under 120 min of simulated sunlight irradiation, and its RhB degradation rate constant ( k ) was approximately 20.7 and 2.9 times higher than that of pure Bi 24 O 31 Br 10 and AgI, respectively. The improvement of photocatalytic performance of as-prepared AgI/Bi 24 O 31 Br 10 heterojunction composites was ascribed to the synergistic effect of wide visible-light harvest capacity and the rapid transfer and separation efficiency of charge carriers. UV–vis diffuse reflectance spectra (DRS) analysis validated that the introduction of AgI could broaden the visible-light absorption of AgI/Bi 24 O 31 Br 10 composite. The results of electrochemical impedance (EIS), photocurrent response and photoluminescence spectra (PL) tests showed that AgI/Bi 24 O 31 Br 10 composite possessed the efficient separation and migration of photogenerated charge carriers. Trapping experiments of free radicals certified that ·O 2 − was the main reactive species in the process of degradation. And a probable photocatalytic mechanism of Z-scheme heterojunction between Bi 24 O 31 Br 10 and AgI was proposed.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Peijie Ma,Xu Zhang,Cong Wang,Zhiwei Wang,Kaiwen Wang,Yibo Feng,Jiaxing Wang,Yadi Zhai,Jiguang Deng,Lihua Wang,Kun Zheng
Polymeric carbon nitride (C 3 N 4 ) is a very attractive candidate to produce photocatalytic hydrogen peroxide (H 2 O 2 ) due to its low-cost, metal-free characteristics. However, the low efficiency would limit its development to higher yields because of insufficient light absorption and electron-hole separation. Here, we developed a simple method to anchor CN quantum dots (QDs) onto g-C 3 N 4 nanosheets to form a homojunction structure (HJ-C 3 N 4 ), which could improve photocatalytic performance largely without introducing metal elements. Its superior efficiency is a result of the band alignment by the homojunction structure providing excellent electron-hole separation and QDs providing suppressed recombination. Simultaneously, the light responsiveness of QDs endows a wide spectrum-responsive adsorption and enhances the adsorption intensity. The H 2 O 2 yield of the HJ-C 3 N 4 reached 115 μmol L −1 h −1 in pure water by visible light, which has an 8.6x higher production than g-C 3 N 4 nanosheets . The material design of 0D/2D homojunction could be extended to other materials with specific band alignment.
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Nanoscale Research Letters
·
2020
·Vol. 15
·期 1
·1-10
·
IF 3.578
Wang Shan,Fu Jing,Zhang Fang,Huan Ruirui,Liu Ting,Zeng Xingguo
Abstract A 0D/2D (0-dimensional/2-dimensional) nanostructure was designed by self-assembly of N–C QDs and carboxylated g-C 3 N 4 nanosheets and used as a fluorescence resonance energy transfer (FRET) fluorescent sensor. The N–C QDs/g-C 3 N 4 nanosheets were synthesized via the amino group on the N–C QD surface and the –COOH of the carboxylated g-C 3 N 4 nanosheets. The mechanism of detection of metronidazole (MNZ) by N–C QDs/g-C 3 N 4 nanocomposites is based on FRET between negatively charged N–QDs and positively charged carboxylated g-C 3 N 4 nanoparticles. N–C QDs/g-C 3 N 4 nanostructures displayed good responses for the detection of MNZ at normal temperature and pressure. The decrease in the fluorescence intensity showed a good linear relationship to MNZ concentration within 0–2.6 × 10 −5 mol/L, and the detection limit was 0.66 μM. The novel FRET sensor will have a great potential in clinical analysis and biological studies. Graphical Abstract
研究领域:
分析化学
·
生物医学
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Tao Wang,Qiuyue Men,Xiqing Liu,Hongquan Zhan,Yongqing Wang
0D/2D interface heterostructure of 0D CuInS 2 and 2D NiAl-LDH were obtained via strong interfacial contact. Mott-Schottky analysis confirmed both materials were n-type feature. Thus, a staggered n-n heterojunction was formed via the balance of Fermi level. This 0D/2D composite exhibited enchantable activity for photocatalytic degradation 2,4-Dichlorophenol under visible-light illumination, far superior than pure CuInS 2 and NiAl-LDH. The improvement of photocatalytic performance mainly attributed to the large BET surface area and interfacial contact, which resulted in more active sites, effective charge separation and transfer. Moreover, the optimal CuInS 2 /NiAl-LDH composite showed higher photostability for cycle experiments. At the same, the possible photocatalytic reaction process was proposed based on the trapping experiments, ESR technique and band position. This work provided a theory and foundation for designing and preparing of 0D/2D heterostructure system for photocatalytic application.
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