Nanomaterials
·
2019
·Vol. 9
·期 2
·292
·
IF 4.034
Zhi Zhang,Xuliang Lv,Yiwang Chen,Pin Zhang,Mingxu Sui,Hui Liu,Xiaodong Sun
For the purposes of strength, military equipment camouflage, and protecting the health of organisms, electromagnetic wave absorbing materials have received a lot of attention and are widely studied. In addition to having a strong absorption intensity and a wide effective absorption bandwidth, materials that are lightweight, thermally stable, and antioxidative are also highly desirable. In this study, we fabricated core–shell structured NiS2@MoS2nanospheres anchored on reduced graphene oxide (rGO) nanosheets (NiS2@MoS2/rGO) by a simple two-step hydrothermal method. The combination ratio was adjusted to achieve proper impedance matching. The electromagnetic parameters and the absorption performance were investigated in detail. A composite loaded with 30 wt.% of the sample achieved a minimum reflection loss (RL) value of −29.75 dB and the effective bandwidth (RL value of less than −10 dB) ranged from 4.95 GHz to 18.00 GHz (13.05 GHz), with a thickness ranging from 1.5 mm to 4.0 mm. This study proved that the generated significant interfacial polarization and synergetic interaction between components can result in NiS2@MoS2/rGO composites with enhanced electromagnetic absorption performance.Keywords:graphene;core–shell;heterostructure;electromagnetic absorption
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
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2016
·
IF 4.012
Yangyang Zhang,Yiping Guo,Bijun Fang,Yujie Chen,Huanan Duan,Hua Li,Hezhou Liu
BiO 2 CH 3 nanoplate, a new organometallic crystal, with octagonal morphology is successfully prepared using methanol solvothermal method and further employed as template to fabricate porous β-Bi 2 O 3 octagonal nanoplates with a thickness of less than 50 nm. Then a series of hierarchical octagonal haystack-like β-Bi 2 O 3 /Bi 2 S 3 hybrids with large heterointerface and small bandgaps (1.36–1.44 eV) are constructed. It is found that, different from many regular photocatalysts that suffer from shrink of photocatalytic efficiency, the photoactivities of all β-Bi 2 O 3 /Bi 2 S 3 heterostructures are continuously enhanced with growing test cycles, owing to the formation of Bi 2 O 3− x S x solid solution, in which the built-in electric filed induced by lattice distortion can brings about higher e − /h + separation efficiency. The gradually increasing photocatalytic activity can reach to an up limit in about 5 photocatalytic cycles and maintain at this level. β-Bi 2 O 3 /Bi 2 S 3 heterostructure loaded with 20 mol% of Bi 2 S 3 is demonstrated to be the best photocatalyst and capable of fully decomposing Rh B in 30 min. Our work provides deep insights into the nature of the inversed photocatalytic behavior and facilitates the advanced design of photocatalysts with unabated photoactivities.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Fayun Wei,Fanghua Liang,Yanrui Zhao,Zhuyu Ji,Ruiqing Li,Hui Liu,youchao Kong,Honggang He,Weichun Huang,Chunyan Cao,Wei Zhang,Bin Fei,Mingzheng Ge,Tingting Yan
High-capacity conversion-type anodes with high volume expansion and low conductivity face limitations in meeting the high energy density demands of lithium-ion batteries. Herein, MOF-derived CoSe2/ZnSe bimetallic selenide nanoparticles are confined in layered Ti3C2Tx MXene (CoSe2/ZnSe@MX) as electrodes for high-performance lithium-ion batteries by in-situ self-assembly and selenization strategy. The interconnected conductive MXene networks not only can provide highways for charge transfer, but also can effectively accommodate the large volume expansion, improving the structural stability. Meanwhile, the bimetallic CoSe2/ZnSe nanoparticles with heterostructures and Se vacancies offer abundant redox reaction sites, promote Li-ions diffusion, and enhance Li-ions adsorption. Thus, the CoSe2/ZnSe@MX electrodes exhibit a remarkable capacity of 830.8 mAh g-1 at 0.1 A g-1, high-rate capability of 290.8 mAh g-1 at 5 A g-1, and superior cycling stability with 63.1% capacity retention after 2000 cycles. Furthermore, the full cell was demonstrated practical applicability with a high capacity of 156 mAh g-1 at 0.1 C. This facile technique is promising to construct high-performance energy storage devices.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Fengyi Zhong,Chaowei Yuan,Ye He,Yanjuan Sun,Jianping Sheng,Fan Dong
Constructing heterostructure is an effective way to fabricate advanced photocatalysts. However, the catalytic performance of typical common multi-dimensional bulk heterostructure still suffers from the limited active interface and inefficient carrier migration. Herein, we successfully synthesize the SnO 2 /Cs 3 Bi 2 I 9 dual-quantum-dots nanoheterostructure (labeled as SCX, X = 1, 2, 3) for efficiently and stably photocatalytic NO removal under visible light irradiation. The NO removal rate of SC2 is almost 8 and 17 times higher than that of the single SnO 2 and Cs 3 Bi 2 I 9 , respectively. Moreover, the SC2 photocatalyst shows only 3 % attenuation after five consecutive cycles, demonstrating good photocatalytic stability. Systematic experimental characterization and theoretical density functional theory calculations revealed that the high activity and stability of SCX originated from the efficient charge transfer at the confined interface between SnO 2 and Cs 3 Bi 2 I 9 quantum dots . This work provides a new perspective for constructing innovative dual-quantum-dots nanoheterostructure and assesses their potential in photocatalytic environmental applications.
研究领域:
材料科学
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环境科学
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理论计算
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yuanwu Liu,Jing Li,Wentian Huang,Ying Zhang,Minjie Wang,Xingsen Gao,Xin Wang,Mingliang Jin,Zhipeng Hou,Guofu Zhou,Zhang Zhang,Junming Liu
Two-dimensional/one-dimensional (2D/1D) heterostructures have received much attention from researchers for their abundant catalytically active sites and low contact resistance due to formation of chemical bonds at the interface. The investigation of such heterostructures, however, is confined to lattice-matched materials, which severely limits the material candidates. Herein, we demonstrate a lattice-mismatched 2D/1D heterostructured electrocatalyst consisting of 2D ReS2 nanosheets and 1D CoS2 nanowires. We propose that the higher surface energy of the CoS2 nanowire and the lattice mismatch between 1D and 2D units are crucial for the growth process of ReS2 nanosheets. More importantly, the terminal S2– exposed on the surface of CoS2 nanowires serves not only as the nucleus of ReS2 nanosheets but also as a bridge to enhance electron transport efficiency. Thus, the ReS2/CoS2 heterostructures show outstanding hydrogen evolution reaction performance. This work is of general interest for the design of complex multidimensional nano-heterostructures with outstanding functionalities.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2019
·Vol. 25
·期 11
·5485-5494
·
IF 2.289
Wang Xiaoqing,Tian Songran,Zhang Xiaoqing,Li Guoyan,Liu Ying,Chen Botao,Cheng Bowen
A 3D Ni 3 S 2 @Mn-Co-OH/NF cross-linked nanosheet heterostructure composite electrode has been successfully fabricated by a facile two-step hydrothermal method. The as-prepared Ni 3 S 2 @Mn-Co-OH/NF composite electrode exhibits a high capacitance (3163 F g −1 at a current density of 3 mA cm −2 ), a superior rate performance (2071 F g −1 at a current rate of 30 mA cm −2 ), and stable cycling property (maintaining 96.6% of the initial capacitance after 4000 cycles at a current rate of 10 mA cm −2 ). This excellent electrochemical performance can be ascribed to the unique cross-linked nanosheet heterostructure formed directly on Ni foam current collector and the synergistic effect between Mn-Co-OH and Ni 3 S 2 of the composite electrode.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Dezhi Wang,Boyu Su,Yan Jiang,Lu Li,Boon K. Ng,Zhuangzhi Wu,Fangyang Liu
Molybdenum disulfide (MoS 2 ) has emerged as a prominent nanomaterial in photoelectrocatalytic water splitting due to its appropriate energy band and low production cost. However, its low-density active site and poor-efficiency electron transfer have essentially limited the photoelectrocatalytic properties. In this present study, we have proposed a simple yet novel ammoniated molybdenum disulfide with a unique 1T/2H heterostructure as the photoelectrocatalyst via a facile hydrothermal reaction. The presence of the 1T phase in MoS 2 is found to enhance the electronic conductivity as well as boost the density of the active site, resulting in an increase in efficiency for both electron transfer and mass transport. More importantly, the synergistic effect of the 1T/2H heterostructure of MoS 2 has been demonstrated to improve the photoelectrocatalytic properties.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yanmeng Cai,Yue Wang,Le Zhang,Rongli Fang,Jixiao Wang
Two-dimensional (2D) layered transition-metal carbides (MXenes) are attractive faradic materials for an efficient capacitive deionization (CDI) process owing to their high capacitance, excellent conductivity, and remarkable ion storage capacity. However, the easy restacking property and spontaneous oxidation in solution by the dissolved oxygen of MXenes greatly restrict their further application in the CDI domain. Herein, a three-dimensional (3D) heterostructure (MoS2@MXene) is rationally designed and constructed, integrating the collective advantages of MXene flakes and MoS2 nanosheets through the hydrothermal method. In such a design, the well-dispersed MXene flakes can effectively reduce the aggregation of MoS2 nanosheets, boost electrical conductivity, and provide efficient charge transfer paths. Furthermore, MoS2 nanosheets as the high-capacity interlayer spacer can prevent the self-restacking of MXene flakes and provide more active sites for ion intercalation. Meanwhile, the strong chemical interactions between MXene flakes and MoS2 nanosheets contribute to accelerating the charge transfer kinetics and enhancing structural stability. Consequently, the resulting MoS2@MXene heterostructure electrode possesses high specific capacitance (171.4 F g–1), fast charge transfer and permeation rate, abundant Na+ diffusion channels, and superior electrochemical stability. Moreover, the hybrid CDI cell (AC//MoS2@MXene) with AC as the anode and MoS2@MXene as the cathode delivers outstanding desalination capacity (35.6 mg g–1), rapid desalination rate (2.6 mg g–1 min–1), excellent charge efficiency (90.2%), and good cyclic stability (96% retention rate). Most importantly, the MoS2@MXene electrode can keep good structural integrity after the long-term repeated desalination process due to the effective shielding effect of the MoS2 layer to protect MXenes from being further oxidized. This work presents the flexible structural engineering to realize excellent ion transfer and storage process by constructing the 3D heterostructure.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Zihao Chen,Senjie Dong,Minghui Wang,Zunpeng Hu,Huiling Chen,Ye Han,Ding Yuan
Constructing three-dimensional (3D) hierarchical heterostructures is an appealing but challenging strategy to improve the performance of catalysts for electrical energy devices. Here, an efficient and robust flexible self-supporting catalyst, interface coupling of ultrathin CoFe-LDH nanosheets and Co3O4 nanowire arrays on the carbon cloth (CC/Co3O4@CoFe-LDH), was proposed for boosting oxygen evolution reaction (OER) in rechargeable liquid/solid Zn–air batteries (ZABs). The strong interfacial interaction between the CoFe-LDH and Co3O4 heterostructures stimulated the charge redistribution in their coupling regions, which improved the electron conductivity and optimized the adsorption free energy of OER intermediates, ultimately boosting the intrinsic OER performance. Besides, the 3D hierarchical nanoarray structure facilitated the exposure of catalytically active centers and rapid electron/mass transfer during the OER process. As such, the CC/Co3O4@CoFe-LDH catalyst achieved excellent OER catalytic activity in alkaline medium, with a small overpotential of 237 mV at 10 mA cm–2, a low Tafel slope of 35.43 mV dec–1, and long-term durability of up to 48 h, significantly outperforming the commercial RuO2 catalyst. More impressively, the liquid and flexible solid-state ZABs assembled by the CC/Co3O4@CoFe-LDH hybrid catalyst as the OER catalyst presented a stable open circuit voltage, large power density, superb cycling life, and satisfactory flexibility, indicating great potential applications in energy technology. This work provides a good guidance for the development of advanced electrocatalysts with heterostructures and an in-depth understanding of electronic modulation at the heterogeneous interface.
研究领域:
材料科学
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电化学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Fan Zhao,Yaning Zhang,Siqi Gong,Huiting Xu,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Jiapeng Liu
Capacitive deionization (CDI) is perceived as a promising technology for freshwater production owing to its environmentally friendly nature and low energy consumption. To date, the development of high-performance electrode materials represents the foremost challenge for CDI technology. In this work, the porous bismuthene/MXene (P-Bi-ene/MXene) heterostructure was synthesized using a simple interfacial self-assembly method with two-dimensional (2D) bismuthene and Ti 3 C 2 T x MXene . Within the P-Bi-ene/MXene heterostructure, the porous structure can increase the active site and facilitate ion transport. Simultaneously, MXene effectively enhances the conductivity of the heterostructure, resulting in accelerating electron transport. Due to these attributes, the P-Bi-ene/MXene heterostructure demonstrates high desalination capacity (90.0 mg/g), fast desalination rate, and good cycling performance. The simple self-assembly strategy between 2D/2D materials described herein may offer inspirations for the synthesis of innovative electrode materials with high performance.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 28
·15499-15508
·
IF 11.9
Junqing Chang,Chaohao Hu,Zanhong Deng,Meng Li,Chengyin Shen,Shimao Wang,Longqing Mi,Ruofan Zhang,Qingli Zhang,Gang Meng
Methyl mercaptan (MM) is one kind of volatile sulfur compound (VSC) with odor and properties (inflammable, highly toxic, and corrosive) similar to H2S; therefore, the highly sensitive and selective monitoring of ambient MM by chemiresistors is strongly essential, but it remains a challenge owing to its relatively weak reducibility/response in comparison with H2S. In this study, a novel chemiresistor composed of hexahedral particles SBO-loaded CdS nanoparticles has been prepared via a facile chemical precipitation method for the super-sensitive and highly-selective recognition of MM. The heterostructural CdS/SBO (0.05%) chemiresistor exhibited an extremely high response (114.7) to 100 ppm MM at a relatively low operating temperature (100 °C) and was about 36- and 9-fold higher than pure SBO and CdS chemiresistor, respectively. Various characterizations suggested that the sulfurization–desulfurization reaction, the abundant oxygen vacancies, and the generation of n–n heterojunctions at the interface promote the redox reaction of surface-active substances, thereby, boosting the outstanding MM response characteristics. In addition, the heterostructural chemiresistor possesses good selectivity, weak humidity interference, a lower limit of detection (LoD) of 82 ppb, and long-term stability (∼6% decline of response after 120 days), which promises practical applications in air quality (odor) monitoring.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Huying Yan,Yang Guo,Xingzhi Bai,Jiawei Qi,Haipeng Lu
Optimizing and enhancing the performance of electromagnetic wave (EMW) absorption materials relies on the modification of their composition and structure through heterogeneous interface engineering. Ti 3 C 2 T x ’s high conductivity results in an impedance mismatch, which hinders efficient EMW absorption. Herein, a one–step catalytic chemical vapor deposition (CCVD) method is used to construct the Ti 3 C 2 T x /TiO 2 @C heterogeneous structure. Upon annealing at 500 °C, amorphous carbon is uniformly deposited on the Ti 3 C 2 T x surface, thereby incorporating the scale–like TiO 2 generated during the process. The inclusion of the amorphous carbon layer and TiO 2 reduces the substrate’s conductivity, achieving optimized impedance matching. Additionally, building heterogeneous interfaces between Ti 3 C 2 T x , TiO 2 , and C enriches multiple loss mechanisms involving dipole and interfacial polarization, ultimately enabling optimal EMW absorption performance. The minimum reflection loss ( RL min ) value of Ti 3 C 2 T x /TiO 2 @C–500 is –53.12 dB when its thickness and frequency are 1.15 mm and 13.80 GHz, respectively. Moreover, thermal infrared imaging confirms that coatings fabricated using Ti 3 C 2 T x /TiO 2 @C–500 demonstrate a favorable heat dissipation rate, validating its effectiveness in addressing the challenge of efficient heat dissipation in electronic devices. This study significantly contributes to the progress of two–dimensional (2D) materials, enabling high–performance EMW absorption and expanding their applications in complex scenarios.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）