RSC Advances
·
2015
·Vol. 5
·期 75
·61239-61248
·
IF 3.84
Jun Liu,Wei Wu,Qingyong Tian,Shuanglei Yang,Lingling Sun,Xiangheng Xiao,Feng Ren,Changzhong Jiang,Vellaisamy A. L. Roy
Plasmonic photocatalysts coupled with semiconductors are one of the most popular combinations in environmental remediation applications. In this regard, a novel tube-like α-Fe2O3@Ag/AgCl hybrid structure is fabricated by anchoring Ag/AgCl hybrid nanoparticles on the surface of α-Fe2O3 short nanotubes (SNTs) by a step-by-step strategy. Firstly, the monodispersed α-Fe2O3 SNTs have been synthesized via an anion-assisted hydrothermal process followed by the loading of Ag nanoparticles on the surface of α-Fe2O3 SNTs through the classic silver mirror reaction mechanism. From in situ oxidation of Ag nanoparticles, the final product α-Fe2O3@Ag/AgCl heterostructures has been obtained. We study the morphology, composition, and photocatalytic properties of the as obtained tube-like α-Fe2O3@Ag/AgCl nano-heterostructures. The photocatalytic activities of as obtained photocatalysts have been tested by the degradation of organic dye Rhodamine B (RhB) under simulated sunlight (UV + visible light), visible light and UV light irradiation. The main reason for the enhanced photocatalytic performance is attributed to the broad spectral response from the combination of narrow/wide bandgap semiconductors with metallic Ag nanoparticles and efficient charge transfer from plasmon-excited Ag nanoparticles to α-Fe2O3 and AgCl. Finally, this hybrid structure provides a roadmap for the controlled synthesis of plasmonic photocatalysts with excellent properties, and can be used for practical application in environmental issues.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Siqi Yu,Bing Han,Yunchao Lou,Zhe Liu,Guodong Qian,Zhiyu Wang
In addition to the extended light absorption, the effective spatial charge separation is a crucial factor for highly efficient metal-oxide semiconductor-based photocatalysts . Herein, a rational design of metal-semiconductor-metal nano heterostructure for enhancing photocatalytic performance is proposed. The semiconductor nanoparticles are integrated with two metals in one single nano heterostructure. The disordered layers are induced on the surface of TiO 2 to promote the light absorption capacity . More importantly, the n-n + junction is fabricated at the contact region between crystalline TiO 2 (n-TiO 2 ) and disordered layers (n + -TiO 2 ). Besides, the Schottky diode and Ohmic contact are formed on n-TiO 2 and n + -TiO 2 , respectively. As a result, the existence of multi-junctions leads to the formation of multiple continuous built-in electric fields, thus remarkably accelerating the spatial separation of charge carriers. The resulting nano heterostructure with multi-junctions (Pt–TiO 2 –H–Ag) exhibits remarkably promoted photocatalytic performance. The maximum hydrogen generation rate of Pt–TiO 2 –H–Ag under solar illumination (18001.0 μmol/h/g) is 8.3, 9.3, and 1.5 times superior to that of Pt-loaded P25 (Pt–P25), Pt loaded TiO 2 (Pt–TiO 2 ), and hydrogenated Pt–TiO 2 (Pt–TiO 2 –H), respectively. Moreover, the photocatalytic performance under visible illumination is significantly enhanced by Pt–TiO 2 –H–Ag. Specifically, the H 2 generation rate of Pt–TiO 2 –H–Ag (2382.7 μmol/h/g) is about 15.1, 17.2, and 1.4 times higher than that of Pt–P25, Pt–TiO 2 , and Pt–TiO 2 –H, respectively. The corresponding apparent quantum efficiency of Pt–TiO 2 –H–Ag is 15.8% (420 nm). The nano heterostructure with multi-junctions also exhibits excellent stability after five cycles, remaining hydrogen evolution rates of 15581.5 and 2211.4 μmol/h/g under solar and visible illumination, respectively. This effective and controllable manufacturing strategy could provide new opportunities to simultaneously extend optical absorption and facilitate the spatial charge separation and transport of wide-bandgap metal-oxide semiconductors.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
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2021
·
IF 5.165
Xing-Zhou Lu,Chao Gu,Qi Zhang,Lei Shi,Shi-Kui Han,Guan-Ping Jin
Engineering nanoheterostructures (NHs) plays a key role in exploring novel or enhanced physicochemical properties of nanocrystals. Despite previously reported synthetic methodologies, selective synthesis of NHs to achieve the anticipated composition and interface is still challenging. Herein, we presented a colloidal strategy for the regioselective construction of typical Ag–Co2P NHs with precisely controlled location of Ag nanoparticles (NPs) on unique chemically transformed Co2P nanorods (NRs) by simply changing the ratio of different surfactants. As a proof-of-concept study, the constructed heterointerface-dependent hydrogen evolution reaction (HER) catalysis was demonstrated. The multiple Ag NP-tipped Co2P NRs exhibited the best HER performance, due to their more exposed active sites and the synergistic effect at the interfaces. Our results open up new avenues in rational design and fabrication of NHs with delicate control over the spatial distribution and interfaces between different components.
研究领域:
材料科学
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催化化学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Defeng Cui,Jie Wang,Mengxia Zhang,Tao Cheng,Nan Yue,Donghai Qiu,Bo Lu,Binbin Dong,Changyu Shen,Chuntai Liu
Developing polymer-based piezoelectric materials with multistimulus responsiveness is highly desirable for advancing multi-source energy harvesting in wearable electronics. Inspired by the multifunctionality of muscle fibers, a nanostructure interface engineering strategy to create piezoelectric polymeric nanoheterostructures (PNHs) with remarkable responsiveness to both mechanical and nonmechanical contactless stimuli is introduced. Through precise interfacing of polymer nanofibers with nanoparticles via multiscale-regulated interface electrostatic and chemical interactions, the study achieves a controlled assembly of stabilized and hierarchically organized nanoheterostructures featuring unique interface-confined configurations. These configurations induce in situ stabilized dipole orientation and significant geometric stress nano-confinement at interfaces, crucial for amplifying electricity generation. Compared to conventional polymer nanocomposites, engineered PNHs exhibit dramatically enhanced piezoelectricity, boasting a higher sensitivity of 1065 mV kPa −1 and piezoelectric coefficient of 76.2 pC N −1 . Furthermore, PNHs demonstrate superior thermo-actuated electricity generation under temperature fluctuations through cooperative spontaneous polarizations of constituent nanostructures, yielding a higher pyroelectric coefficient of 3.13 µC m 2 K −1 . Additionally, the design enables photothermally-activated switchable electricity generation and light-energy harvesting, achieving a photo-electric conversion efficiency tenfold higher than nanocomposites. This effective and versatile approach inspires the development of multi-responsive nanogenerators for multi-energy harvesting and self-powered multistimulus-sensing applications.
研究领域:
材料科学
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纳米技术
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xinglong Gou,Yumei Liao,Zhimin He,Wei Hong,Qin Dong,Rong Li
Development of efficient multifunctional electrocatalysts for hydrogen production from overall water splitting (OWS) and urea electrolysis (UE) is highly desired yet challenging. Herein, Ni-MoN nano-heterostructures encapsulated in NCNTs have been successfully fabricated on Cu foam (NMN@NC/CF), which exhibits excellent trifunctional catalytic activity toward hydrogen evolution (HER, 10, 1200 = 69, 265 mV), oxygen evolution (OER, 10 = 191 mV) and urea oxidation reaction (UOR, E10, 500 = 1.316, 1.450 V), outperforming the noble metal-based catalysts due to its unique structure and intrinsic catalytic capability. Furthermore, the two-electrode electrolyser using NMN@NC/CF as both the cathode and anode needs much lower voltage of 1.376 V for UE than the value of 1.521 V for OWS to reach 10 mA cm-2, and it can keep stable over 100 h during continuous UE operation at 500 mA cm-2, demonstrating great promise for simultaneous energy-saving hydrogen production and remediation of urea-containing wastewater.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2019
·
IF 10.159
Dan Cheng,Zhe Wang,Chang Chen,Kebin Zhou
Nanostructures with metallic crystalline cores and amorphous shells are recognized as promising catalysts for oxygen reduction (ORR) to enhance intrinsic activity and electroconductivity through strong interfacial interactions. Herein, a novel strategy involving crystallinity and nanostructure engineering is developed for constructing the amorphous ferric phosphate shell and the embedded crystalline Co2P core on three-dimensional interconnected carbon skeleton microspheres (Co2P@am-FePO4). Due to the excellent intrinsic activity and the enhanced electroconductivity from the strong electronic interactions between the amorphous ferric phosphate shell and crystalline Co2P core, the Co2P@am-FePO4 catalysts exhibit an excellent oxygen reduction electrocatalytic activity with a half wave potential as low as 0.91 V. More importantly, such excellent ORR performance can also translate to a high Zn–air performance as evidenced by a high specific energy density of 923 Wh/kgZn and maximum discharge power density of 152 mW/cm2.
研究领域:
材料科学
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电化学
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催化科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Lei Ding,Tianyue Huang,Dawei Zhang,Pan Qi,Lihao Zhang,Cong Lin,Hao Luo
Rational design and synthesis of high-performance bifunctional oxygen electrocatalysts with increased effective active sites and facilitated mass/electron transfer are in demand for the lithium-oxygen batteries (LOBs) to overcome the sluggish oxygen reduction/evolution kinetics. Herein, a simple yet effective strategy is proposed by annealing the Prussian blue analog (PBA) precursor under altered calcination conditions to achieve the efficient nano-heterojunction catalysts with optimized active sites. As a result, the obtained porous Co 3 O 4 /Co nano-heterostructures embedded in N-doped graphitized carbon matrix (Co 3 O 4 /Co@NC) exhibit outstanding electrochemical performance with a high specific capacity of 22,156 mA h g −1 at the current density of 100 mA g −1 and excellent stability, obviously superior to the LOBs based on the other single-component catalysts. Systematic investigations suggest that the enhanced electrochemical performance is ascribed to the Co 3 O 4 /Co nano-heterostructure interface and the N-doped porous carbon matrix. This study presents a simple and effective approach for boosting the PBA-derived catalysts with efficient reactivity for various catalytic applications.
研究领域:
材料科学
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电化学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2020
·Vol. 131
·期 2
·997-1007
·
IF 1.52
Li Yan,Jian Li-Juan,Li Xue,Liu Fang-Ting,Dong Xiao-Fei,Wang Jian,Zhao Yun,Wang Cheng-Wei
A new sphere-like nano-heterostructure of Cu 3 SnS 4 @C (CTS@C) was well designed and fabricated by two-step hydrothermal route, which is ideally suited for synergistic physical adsorption and photodegradation of anionic dye. Compared to the pure C or CTS nanospheres, CTS@C nano-heterostructure has smaller surface area but exhibits excellent performance. It possesses high adsorption efficiency of 97.04% for removal of methyl orange (MO) at pH 5.5. And also, the superior synergistic adsorption and photodegradation performance makes it exhibit 99.38% degradation efficiency within 210 min at pH 7.5, which is about 1.8 times higher than that of simplex adsorption (56.23%). These might be attributed to the higher light harvesting, effective charge separation, lower charge-transfer resistance and high photocurrent response properties of CTS@C nanostructures. Moreover, the CTS@C nano-heterostructured photocatalyst can effectively avoid surface passivation during the process of synergistic adsorption and photodegradation, and be easily regenerated from the reaction system for recycling, suggesting a promising candidates for synergistic adsorption and photocatalysis applications.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2012
·Vol. 4
·期 24
·7817-7824
·
IF 5.914
Yang Wang,Shouchuan Li,Hui Shi,Ke Yu
Two kinds of Cu2O–ZnO nano-heteroarchitectures were fabricated through a hydrothermal method. By utilizing polyethyleneimine (PEI) as a binding agent, ZnO nanoparticles were uniformly self-assembled onto Cu2O micro structures. Photoluminescence (PL), field emission and photocatalytic activities of the composite samples were investigated and compared with those of the pure Cu2O samples. The results reveal that ZnO nanoparticles combined on Cu2O microstructures remarkably changed the PL signals, and significantly enhanced the field emission and photocatalytic activities. The novel PL properties, enhanced field emission and photocatalysis activities are attributed to the electron transition and the inhibition of photo-induced electron–hole pairs recombination, which stem from interfacial defect states and energy band differentials at the interface of Cu2O and ZnO. The surface nano-protrusions, large surface area and better dye adsorption induced by ZnO nanoparticles are responsible for the field emission and photocatalysis improvements as well.
研究领域:
材料科学
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光学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Umair Yaqub Qazi,Rahat Javaid,Muhammad Zahid,Nadeem Tahir,Adeel Afzal,Xiao-Ming Lin
Earth-abundant, non-precious metal-based bifunctional electrocatalysts with efficient water splitting activity are of valuable importance in the limitation of energy losses in an alkaline environment . Herein, we report NiCo–NiCoO 2 nano-heterostructures embedded on the oxidized surface of copper foam (NiCo–NiCoO 2 @Cu 2 O@CF) as an efficient bifunctional electrocatalyst for overall water splitting in 1 M KOH electrolyte solution . In this study, metallic Ni and Co interlinkage with NiCoO 2 nanoparticles (NPs) are suggested to form by thermal decomposition of nickel-cobalt hydroxide precursors embedding on copper foam under a nitrogen environment. Bimetallic thin layered nano-heterostructures of NiCo–NiCoO 2 @Cu 2 O@CF exhibits a synergic effect of doubly active metals Ni and Co to achieve remarkable small overpotentials of 133 and 327 mV to achieve a current density of 10 mA cm −2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The influential synergetic and structural effects have been extensively discussed to understand the overall water splitting for designing an efficient electrocatalyst . Hence, this phenomenon for surface modification of conductive substrate (CF) with a suitable combination of metal/metal oxide alloying as catalytic material helps us to design and synthesize low cost, highly efficient, non-precious metal-based electrocatalysts for overall water splitting.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Luo Huang,Yuan Yu,Dongfeng Sun,Fangyou Meng,Li Li,Mengfan Niu,Xiang Bi,Songmin Lin,Wenhui Chu,Bingshe Xu
In this work, we applied the fenton-like reaction to fabricate TiO 2 nanocrystalline , and employed molecular self-assembly with TiO 2 and BiOCl to form composite photocatalyst with cookie-like nano-heterostructure for enhanced solar energy to hydrogen. The TiO 2 @BiOCl photocatalyst with cookie-like nano-heterostructure exhibited excellent photocatalytic performance for the photocatalytic hydrogen evolution under sunlight irradiation compared to the single TiO 2 or BiOCl. Besides, the TiO 2 @BiOCl photocatalyst displayed outstanding reusability and stability in the photocatalytic reaction. Meanwhile, the possible mechanisms of cookie-like nano-heterostructure formation and photocatalytic redox reaction have been proposed. What's more, this work demonstrated a new perspective for the design and mass preparation of TiO 2 -based composite photocatalytic materials at atmospheric condition, which demonstrated that this method has enormous potential to achieve mass preparation of efficient photocatalyst for photocatalytic application.
研究领域:
材料科学
·
光催化技术
·
能源转换
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 12
·H707
·
IF 3.259
Xingzhi Wang,Zhuang Wang,Miao Zhang,Xishun Jiang,Yanfen Wang,Jianguo Lv,Gang He,Zhaoqi Sun
TiO2 nanorod (TNR) arrays have been sensitized by CdS, PbS, CdS/PbS, and PbS/CdS quantum-dots (QDs). The TNR arrays were synthesized by a hydrothermal treatment, and QDs were deposited on the arrays by a successive ionic layer adsorption and reaction (SILAR) technique. The morphology, structure, composition, optical, photoelectrochemical (PEC), and photocatalytic (PC) properties were systematically investigated. The results demonstrate that TNR/QDs can effectively facilitate photoinduced carrier transport, suppress the recombination rate of electron-hole pairs, and improve the visible light absorption, PEC, and PC properties. The TNR/CdS(7)/PbS(3) sample shows the maximal photocurrent density (0.91 mA/cm2) and photodegradation efficiency (97.3%), which is nearly 37.9 and 2.89 times higher than those of bare TNR, respectively. The enhanced properties are attributed to the narrow band gaps and high absorption coefficients of QDs, and the type-II nanoheterostructures with a staggered alignment of band edges at the hetero-interface that can facilitate the spatial separation of electron-hole pairs.
研究领域:
材料科学
·
纳米技术
·
光化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）