ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 22
·5391-5401
·
IF 4.3
Qi Chengcheng,Wang Wei,Dong Yongping
Single-atom catalysts received increasing attention due to their maximum atom utilization efficiency. However, metal-free single atoms have not been used to construct electrochemical sensing interfaces. In this work, we demonstrated the use of Se single atoms (SA) as electrocatalyst for sensitive electrochemical nonenzymatic detection of H 2 O 2 . Se SA was synthesized and anchored on nitrogen-doped carbon (Se SA/NC) via a high-temperature reduction strategy. The structural properties of Se SA/NC were characterized by transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and electrochemical techniques. The results showed that Se atoms were uniformly distributed on the surface of the NC. The obtained SA catalyst exhibited excellent electrocatalytic activity toward H 2 O 2 reduction, and can be used to detect H 2 O 2 in a wide linear range from 0.04 mM to 11.1 mM with a low detection limit of 0.018 mM and high sensitivity of 403.9 µA mM −1 cm −2 . Moreover, the sensor can be used for the quantification of H 2 O 2 concentration in real disinfectant samples. This work is of great significance for expanding the application of nonmetallic single-atom catalysts in the field of electrochemical sensing. Graphical abstract Se single atoms (Se SA) as novel electrocatalyst were synthesized and anchored on nitrogen-doped carbon (NC) for sensitive electrochemical nonenzymatic detection of H 2 O 2
研究领域:
电化学传感
·
催化
·
纳米材料
·
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
Functional Materials Letters
·
2024
·
IF 1.2
Kangjun Geng,Zhengdong Feng,Tingyu Zhang,Shan Huang,Honcheng Zhu,Bangzhi Shen,Boning Dong,Yan Yan,Sai Jiang,Jianhua Qiu,Huafei Guo
Antimony Selenide (Sb 2 Se 3 ) exhibits potential as a solar energy material owing to its optimal bandgap, lack of toxicity, and abundance of earth abundant elements. Currently, cadmium sulfide (CdS) serves as the predominant buffer layer for Sb 2 Se 3 solar cells. However, the use of CdS hinders environmentally friendly advancement due to the toxic properties of the element cadmium. Hence, the quest for non-toxic buffer layers poses a significant challenge to the further advancement of Sb 2 Se 3 solar cells. In prior research, tin oxide (SnO 2 ) has been explored as a buffer layer. Nonetheless, the efficiency of SnO 2 /Sb 2 Se 3 solar cells was hampered by the rough surface of SnO 2 films and the poor crystallinity of Sb 2 Se 3 films. In this investigation, we enhanced device efficiency by improving the uniformity of the SnO 2 surface and enhancing the crystallinity of Sb 2 Se 3 through spin-coating sulfur (S) onto the SnO 2 film. Detailed examinations were conducted on the structure, optical, and electrical properties of the respective SnO 2 and Sb 2 Se 3 thin films. Ultimately, an efficiency of 3.38% was achieved using the spin-coated S:SnO 2 film, marking an 85% enhancement compared to the baseline device.
研究领域:
光伏技术
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材料科学
·
薄膜技术
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可再生能源
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Haonan Yue,Mengwei Han,Xinni Li,Ting Song,Yong Pei,Xianyou Wang,Xiongwei Wu,Tengfei Duan,Bei Long
The development of a low-cost, high-capacity, and insertion-type anode is key for promoting “rocking chair” zinc-ion batteries. Herein, commercial Bi 2 O 3 (BiO) particles are transformed into Bi 2 O 2 Se@Bi 4 O 8 Se (BiOSe) nanosheets through a simple selenylation process. The change in morphology from commercial BiO particle to BiOSe nanosheet leads to an increased specific surface area of the material. The enhanced electronic/ionic conductivity results in its excellent electrochemical kinetics. Ex situ XRD and XPS tests prove the intercalation-type mechanism of BiO and BiOSe as well as the superior electrochemical reversibility of BiOSe compared to BiO. Furthermore, the H + /Zn 2+ co-insertion mechanism of BiOSe is revealed. This makes BiOSe to have low discharge plateaus of 0.38/0.68 V, a high reversible capacity of 182 mA h g −1 at 0.1 A g −1 , and a long cyclic life of 500 cycles at 1 A g −1 . Besides, the BiOSe//MnO 2 “rocking chair” zinc-ion battery offers a high capacity of ≈90 mA h g −1 at 0.2 A g −1 . This work provides a reference for turning commercial material into high-performance anode for “rocking chair” zinc-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
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纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Chen Zhang,Mingjun Chen,Xiaohui Zhao,Wenming Zhang,Zhanyu Li
With its consistent thermal runaway temperature and superior capacity, aluminum ion batteries have emerged as a key area for battery development. At the moment, electrode material is the main focus of aluminum ion battery capacity enhancement. Selenide is anticipated to develop into a high-performance cathode for aluminum ion batteries, since it is a type of high energy density electrode material. However, because selenide is soluble in acid electrolytes, Al-Se batteries have low cycle performance and cannot keep up with the present demand for electronic gadgets. Here, homogeneous-structured precursors were created via a hydrothermal reaction , and MnSe 2 –MnSe heterojunction hollow spheres were created a step further via temperature control of the selenidation reaction. With 103.76 mAh/g of specific capacity remaining after 3000 cycles at 1.0 A/g, this novel heterojunction material exhibits astounding cycle stability. After additional investigation, it was shown that the MnSe 2 –MnSe heterojunction may prevent the dispersion of the active substances, significantly enhancing the cycle performance. The density of states (DOS) of electrode materials demonstrates the superior electronic conductivity of this heterojunction material. Meanwhile, it was computationally demonstrated that the MnSe 2 –MnSe heterojunction has a strong adsorption energy for AlCl 4 − , thus accelerating the reaction kinetics. In summary, the performance of selenides has been improved by this novel heterojunction material, which also makes for a superior cathode material .
研究领域:
电化学
·
材料科学
·
能源存储
·
纳米材料
·
固态化学
·
电极材料
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 21
·7552-7562
·
IF 6.1
Yunxiu Wang,Yilin Wang,Zenghui Cai,Zhijiang Yu,Hao Dong,Yifan Zhang,Yanli Zhou,Xintao Zhang,Yanjun Zhai,Fuyi Jiang,Caifu Dong
To address the slow reaction kinetics and poor cycling stability of ZnSe during sodium storage, in this study, the two-dimensional network structure [Zn(L3)·H2O]n (ZnL, L = 5-aminoisophthalic acid) was firstly successfully prepared by a simple solvothermal reaction. Then, nitrogen-doped carbon coated ZnSe nanoparticle composites (denoted as ZnSe@NC) were obtained by selenization of ZnL. Benefiting from the synergistic effect of ZnSe nanoparticles and NC, ZnSe@NC demonstrated ultra-long cycling stability (a capacity decay rate of only 0.052% per cycle) and high rate performance (400.6/311.1 mA h g−1 at 0.1/10 A g−1). The excellent electrochemical properties of ZnSe@NC can be attributed to high pseudocapacitance contribution, low charge transfer impedance, and high ion diffusion coefficient. In addition, ex situ XRD, XPS, and HRTEM analyses revealed that the sodium storage process of ZnSe@NC is a conversion reaction followed by an alloying reaction. More importantly, the sodium-ion full battery Na3V2(PO4)3@rGO//ZnSe@NC can maintain a reversible capacity of 216.4 mA h g−1 after 100 cycles at 0.3 A g−1. This approach provides a promising method for the design of MOF-derived metal selenide materials for energy storage and conversion.
研究领域:
材料科学
·
能源化学
·
纳米技术
·
电化学
·
储能技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Hongli Chen,Dongxing Kou,Zhixian Chang,Wenhui Zhou,Zhengji Zhou,Sixin Wu
Cu2ZnSnSxSe4–x (CZTSSe) counter electrodes (CEs) in dye-sensitized solar cells (DSSCs) are commonly developed with porous structures, but their high surface area could also retard electron transport processes owing to the abundant grain boundaries. Herein, we employed a convenient solution method and a rapid heating process to prepare well crystalline CZTSSe CEs in DSSCs. The influence of crystallization of CZTSSe film on DSSCs performances was discussed in depth. The thermogravimetric analysis, phase morphology, conductivity, and electrochemical characteristics of CZTSSe films were performed. It is found that the rapid heating process is beneficial to the formation of well crystalline film with large grains. As the porosity and grain boundaries in the bulk film are dramatically reduced with the enhanced crystallization, the charge transport process is gradually improved. Using cyclic voltammogram and electrochemical impedance spectroscopy measurements, we propose that the accelerating charge transport is of great importance to the photovoltaic performances of DSSCs due to their superior electrocatalytic activities. As the highest cell efficiency was achieved, well crystalline CZTSSe is an efficient CE catalytic material.
研究领域:
材料科学
·
新能源材料
·
光伏技术
·
电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2012
·Vol. 4
·期 5
·1445-1451
·
IF 1.547
Huanshun Yin,Xiaomeng Meng,Zhenning Xu,Lijian Chen,Shiyun Ai
A selective and sensitive electrochemistry method was developed for the determination of phenacetin on CdSe microspheres modified glassy carbon electrode (GCE). The electrode exhibited an effectively catalytic response to the oxidation of phenacetin, which was testified by the increased oxidation peak current and the decreased oxidation peak potential compared with the bare GCE. The scan rate investigation demonstrated that the electrochemical oxidation was an adsorption-controlled process in the range from 20 to 500 mV s−1. Under optimal determination conditions, the oxidation peak current of phenacetin was proportional to its concentration in the range of 0.5 to 800 μM. The limit of detection was estimated to be 0.1 μM (S/N = 3). The developed method showed good reproducibility, acceptable stability and excellent anti-interference performance. The fabricated electrode was successfully used to determine phenacetin in pharmaceutical formulation samples.
研究领域:
电分析化学
·
药物代谢
·
生物传感器
·
药剂学
·
分子诊断
·
纳米材料应用
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 85
·69878-69885
·
IF 3.84
Guang-Kun Ren,Jin-le Lan,Sajid Butt,Kyle J. Ventura,Yuan-Hua Lin,Ce-Wen Nan
BiCuSeO oxyselenides have been successfully fabricated by self-propagating high-temperature synthesis (SHS). Compared with the SHS process of binary or ternary alloys, thermal analysis indicates the ignition temperature of quaternary layered BiCuSeO oxyselenides approaches the second lower melting point of the compound. The ZT value of SHS-synthesized BiCuSeO is almost 1.5 times larger than that of the solid state reaction (SSR) product at 873 K. This is attributed to the existing amorphous region, nano-pores, and optimized grain size. Furthermore, with the partial substitution of Pb2+ for Bi3+, ZT was enhanced through the optimization of charge carrier concentration and band gap narrowing. This achieved a ZT of 0.91 at 873 K for Bi1−xPbxCuSeO (x = 0.04). Combining with the Debye–Callaway model analysis, the ultralow lattice thermal conductivity of BiCuSeO can potentially be derived from the synergistic effect of intrinsic point defects, efficient grain boundaries and some other mechanisms.
研究领域:
材料科学
·
凝聚态物理
·
无机非金属材料
·
能源材料
·
热电转换
✓ 已验证
DOI
高影响因子
Small
·
2021
·Vol. 18
·期 8
·2105599
·
IF 13.281
Wuhong Xue,Qitao Jiang,Fakun Wang,Ri He,Ruixue Pang,Huali Yang,Peng Wang,Ruilong Yang,Zhicheng Zhong,Tianyou Zhai,Xiaohong Xu
2D ferroelectrics with robust polar order in the atomic-scale thickness at room temperature are needed to miniaturize ferroelectric devices and tackle challenges imposed by traditional ferroelectrics. These materials usually have polar point group structure regarding as a prerequisite of ferroelectricity. Yet, to introduce polar structure into otherwise nonpolar 2D materials for producing ferroelectricity remains a challenge. Here, by combining first-principles calculations and experimental studies, it is reported that the native Ga vacancy-defects located in the asymmetrical sites in cubic defective semiconductor α‑Ga 2 Se 3 can induce polar structure. Meanwhile, the induced polarization can be switched in a moderate energy barrier. The switched polarization is observed in 2D α‑Ga 2 Se 3 nanoflakes of ≈4 nm with a high switching temperature up to 450 K. Such polarization switching could arise from the displacement of Ga vacancy between neighboring asymmetrical sites by applying an electric field. This work removes the point group limit for ferroelectricity, expanding the range of 2D ferroelectrics into the native defective semiconductors.
研究领域:
材料科学
·
凝聚态物理
·
纳米电子学
·
功能材料
·
半导体物理
✓ 已验证
DOI
高影响因子
RSC Advances
·
2012
·Vol. 2
·期 14
·5983-5989
·
IF 0
Hong-Wen Gao,Dong-Dong Ma,Gang Xu
Many kinds of medicinal plants are used in the treatment of disease, and a proportion of these plants grow tenaciously in soils contaminated with heavy metals. An example of one such medicinal plant is the herb Thlaspi rotundifolium L., which accumulates selenium (Se), and has anti-oxidation, anti-aging, anti-cancer and immunity-adjusting properties, but also simultaneously hyperaccumulates harmful metals such as Cd and Zn from the soil. An interesting model named ‘digging metals@plant then backfilling’ has been suggested, where the metals are removed from the plant by acid treatment, then the nano-pores imprinted with the heavy metals are backfilled from the drinking water. Experimental studies of this idea indicate that it can remove unwanted substances from the herb itself and also from the drinking water, ensuring the safety of the herb tea. Additionally, the Se normally embedded in the herb was not noticeably lost. Thus, this model provides a sustainable solution for the disposal of heavy metals using metal-accumulating plants.
研究领域:
植物生理学
·
环境毒理学
·
食品科学
·
天然药物化学
·
环境修复
·
生物医学工程
·
农业资源利用
✓ 已验证
DOI
JOURNAL OF PHYSICS-CONDENSED MATTER
·
2022
·Vol. 34
·期 25
·255001
·
IF 2.745
Baomei Wang,Xingna Liu,Zhen Liu,Zinan Ma,Zhongwei Li,Bingrui Wang,Xiao Dong,Yongyong Wang,Xiaohui Song
In this work, copper selenide (Cu2−xSe) thin films were grown on FTO conductive glass substrates using a facile microwave-assisted hydrothermal method. The effects of synthesis parameters such as precursor components and deposition time on the stoichiometry and morphology of the synthesized films were systematically investigated through different techniques including XRD, SEM, and AFM. In order to evaluate the electrochemical catalytic performance of the synthesized copper selenide in electrolyte containing the sulfide/polysulfide redox couple, we assembled liquid-junction quantum dots-sensitized solar cells (QDSSC) using the synthesized copper selenide thin films as counter electrodes and CdSe quantum dots-sensitized mesoporous TiO2 as photoanodes. Under the illumination of one Sun (100 mW cm−2), the QDSSC assembled with the optimal copper selenide CEs (Cu:Se = 1:1) exhibited a power conversion efficiency of 2.07%, which is much higher than that of traditional Pt counter electrode (0.76%).
研究领域:
材料科学
·
能源技术
·
电化学
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2019
·
IF 14.695
Hu Hong,Jinlong Liu,Huawen Huang,Christian Atangana Etogo,Xianfeng Yang,Buyuan Guan,Lei Zhang
Constructing ordered hierarchical porous structures while maintaining their overall crystalline order is highly desirable but remains an arduous challenge. Herein, we successfully achieve the growth of single-crystalline metal–organic frameworks (MOFs) in three-dimensional (3D) ordered macroporous template voids by a saturated solution-based double-solvent-assisted strategy with precise control over the nucleation process. The as-prepared single-crystalline ordered macro–microporous Co-based MOFs (SOM ZIF-67) exhibit an ordered macro–microporous structure with robust single-crystalline nature. Moreover, SOM ZIF-67 can serve as a precursor to derive 3D-ordered macroporous cobalt diselenide@carbon (3DOM CoSe2@C) through a facile carbonization–selenization treatment. The as-derived 3DOM CoSe2@C can well preserve the 3D-ordered macroporous structure of the precursor. More importantly, CoSe2 nanoparticles could be uniformly confined in the conductive ordered macroporous carbon framework, affording regularly interconnected macroporous channels and large surface area. As a result, when evaluated as a cathode material for aluminum-ion batteries, the ordered macroporous structure could not only effectively facilitate the diffusion of large-sized chloroaluminate anions but also increase the contact area with electrolyte and provide more exposed active sites, thereby exhibiting superior reversible rate capacity (86 mA h g–1 at 5.0 A g–1) and remarkable cycling performance (125 mA h g–1 after 1000 cycles at 2.0 A g–1).
研究领域:
材料科学
·
电化学
·
纳米结构材料
·
能源存储
·
晶体工程
·
无机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）