ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Cheng Cai,Yang-Fan Xu,Hong-Yan Chen,Xu-Dong Wang,Dai-Bin Kuang
Photoelectrochemical (PEC) cell is a meaningful way to fulfil carbon dioxide (CO 2 ) conversion to value-added chemicals, but the exploration of ideal photocathode materials with high photo-conversion efficiency remains a challenge. Herein, porous ZnO@ZnSe core/shell nanosheet array on fluorine doped-tin oxide (FTO) glass is synthesized via dissolution-recrystallization mechanism by using ZnO nanosheet array as the template, and is used for the first time as the photocathode for PEC reduction of CO 2 . The effect of ZnSe loading amount on PEC responses of composite electrode is investigated in detail. Under the irradiation of visible light, the optimized ZnO@ZnSe photocathode exhibits onset potentials at 0.39 V ( vs. RHE) in CO 2 -purged 0.5 M NaHCO 3 solution and achieves the photocurrent of 1.17 mA cm -2 at −0.11 V ( vs. RHE). Interestingly, the competitive H 2 evolution reaction can be suppressed effectively and thereby the selectivity for CO 2 reduction reactions especially for CO formation is increased when the applied voltage became more negative. The faradic efficiency of CO increases dramatically from 4.2% at 0.2 V to 52.9% at −0.4 V and the electron selectivity for CO 2 reduction increases from 70.1% to 96.6% accordingly. These results demonstrate that ZnO@ZnSe composite electrode can work as promising photocathode for efficient CO 2 reduction.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jinxin Wei,Zhe Hu,Wenjie Zhou,Yi Qiu,Hanqing Dai,Yuanyuan Chen,Zhongjie Cui,Siyu Liu,Haiyang He,Wanlu Zhang,Fengxian Xie,Ruiqian Guo
With the blooming development of zero-dimensional nanomaterials , I-III-VI alloying quantum dots (QDs) with outstanding photoelectrical properties have emerged to attract much attention as promising environmentally-friendly substitutions for conventional binary Cd-based QDs. In this work, a facile one-pot method was introduced to synthesize unreported quaternary Ag-Cu-Ga-Se/ZnSe (ACGSe/ZnSe) QDs. A relatively high photoluminescence quantum yield (PL QY) of 71.9% and a tunable emission from 510 to 620 nm were successfully achieved. We explored the roles of alloying compositions in ACGSe/ZnSe QDs, inferring that increased Ag proportion would not only lower the V defect level which leads to the blue shift of emission, but also slow the ZnSe shelling process owing to the larger lattice distortion. At last, the white light-emitting diodes (WLEDs) were fabricated with ACGSe/ZnSe QDs as the conversion layer, indicating that the as-prepared QDs are a promising candidate for further applications.
研究领域:
材料科学
·
纳米技术
·
光电技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qingguo Yu,Yimin Liu,Qingru Zeng,Yuxiang Yang,Shunyan Ning,Yuezhou Wei,Xinpeng Wang,Deqian Zeng
Photocatalytic technology provides key benefits in utilizing solar energy for H 2 production and pollutant removal, making the pursuit of efficient photocatalysts a vital area of focus. Herein, a novel p-n heterojunction photocatalyst was synthesized by loading ZnSe nanoparticles onto Cu 2−x Se nanoplates, creating an internal electric field that facilitates the efficient separation of charge carriers and significantly enhances photocatalytic activity. The 14 % Cu 2−x Se/ZnSe nanocomposite exhibits excellent photocatalytic performance, achieving an H 2 production rate of 1846 μmol·g −1 ·h −1 , roughly 34 times that of pure ZnSe. Additionally, the Cr(VI) reduction rate constant of nanocomposite was 0.0277 min⁻¹ , which is 20 times and 5 times higher than those of ZnSe and Cu 2−x Se, respectively. The Cu 2−x Se/ZnSe photocatalyst demonstrated exceptional stability and reusability during multiple cycles of H 2 production and Cr(VI) reduction. An in-depth examination of experimental data and density functional theory (DFT) calculations led to proposing a potential mechanism. This work introduces a simple synthesis method for ZnSe-based photocatalysts, offering a novel approach for the effective application of solar energy in environmental and energy fields.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Ting Liang,Jingwen Wei,Shiming Zhang,Jinhang Yang,Jiangli Sun,Zuji Li,Zhihong Li,Zebin Yu,Shuangfei Wang,Yanping Hou
Design of photocatalysts with high-efficiency for sunlight utilization is one of the prerequisites for CO 2 photoreduction . Besides, modulating a stable electron-donating environment to meet the energy barrier for CO 2 reduction to CO is crucial. In this work, the ZnSe/Ag 2 Se/AgBr (ZAA) heterojunction was fabricated by growing the ZnSe on the AgBr surface accompanied by in-situ generation of Ag 2 Se between the two components by hydrothermal process. Results showed that the ZAA exhibited excellent light response ability over the full wavelength range. X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) demonstrated that the charge transfer of the ZAA conformed to dual Z-scheme mechanism, with the Ag 2 Se acting as an electron transfer bridge, which in turn acted as an electron reservoir to accelerate electron transfer, facilitating carriers’ separation. The highest CO yield of 54.14 µmol/g/h was obtained from the optimal ZAA-2, which was 11.76 and 10.44 times of pure ZnSe and Ag 2 Se, respectively. This work demonstrated the feasibility of a dual Z-scheme heterostructure with full spectrum response for offering stable electron-donating environment and improving electron transfer for enhanced photocatalytic activity.
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
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yumei Li,Fangfang Wu,Shenglin Xiong
Sodium-ion batteries (SIBs) have drawn great attentions due to the abundance of sodium and their similar electrochemical principles to that of lithium-ion batteries. However, larger ionic radius of Na + greatly retards Na + transport and causes severe volume expansion. Therefore, delicate design of anodes for SIBs that can reversibly accommodate sodium ions is a crucial, but challenging task. In this paper, we rationally engineer a hybrid composite featured with ZnSe nanoparticles uniformly wrapped in three-dimensional (3D) porous nitrogen-doped carbon matrix (ZnSe NP@p-NC). The synthesis is achieved through the domination of the self-template-induced reaction between Zn-based zeolitic imidazolate framework (ZIF-8) nanododecahedra and Se powder at an elevated temperature. Due to the structural and compositional merits, including a 3D porous structure, the uniform distribution of the small-size ZnSe nanoparticles, and graphitic carbon matrix, these unique ZnSe NP@p-NC popcorn balls display a high sodium-storage performance, including cycling stability (181.7 mAh g −1 after 2000 cycles at 10 A g −1 ), rate capability, and initial Coulombic efficiency.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Tao Tang,Le-Qing Fan,Xiao-Yun Fu,Long Chen,Shi-Hua Lin,Xin-Yuan Song,Li-Na Wang,Fu-Da Yu,Yun-Fang Huang,Lan-Fang Que,Ji-Huai Wu
The electrochemical performances of lithium-ion capacitors (LICs) are severely hindered by the mismatch in reaction kinetics between the anode and cathode. Herein, to enhance the anode conductivity and improve the Li + ion diffusion rate for better kinetic matching, Ti 3 C 2 T x (MXene) sheets, known for their high electrical conductivity and excellent mechanical properties, were selected as a support for ZnSe. Simultaneously, the carbonization of hexadecyl trimethyl ammonium bromide reactant generated a carbon coating on the ZnSe surface. The results indicate that Ti 3 C 2 T x and the in-situ generated carbon reduce the aggregation of ZnSe particles, leading to the formation of ZnSe/Ti 3 C 2 T x /C composite with a large specific surface area of 46.5 m 2 g –1 . The synergistic effect of Ti 3 C 2 T x and carbon enhances the Li + ion storage performance of the ZnSe anode, achieving a remarkable reversible discharge specific capacity of 1006.3 mAh g –1 after 450 cycles at 0.2 A g –1 , along with improved Li + ion transfer capability. Ethylene glycol-reduced graphene oxide (EG-RGO) was also prepared; it has a large average discharge specific capacity of 84.7 mAh g –1 at 0.1 A g –1 . An optimized ZnSe/Ti 3 C 2 T x /C//EG-RGO LIC achieves a prominent energy density of 119.4–34.5 Wh kg –1 at a power density of 156.8–15525.0 W kg −1 , along with an impressive cycling span, retaining 84.1 % of its capacity after 5000-cycle test at 0.5 A g –1 .
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 ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xiwei Zhang,Dan Meng,Zhenjie Tang,Dan Hu,Huijuan Geng,Huiyuan Zheng,Shuaipu Zang,Zhongrui Yu,Panpan Peng
Radial 1-D nano-heterojunctions have distinct optoelectronic properties. However, their complex fabrication process is still the bottleneck of device applications. Herein, a facile atomic layer deposition (ALD) method was used to coat a polycrystalline CdS thin film with high uniformity and controllable thickness on the surface of the as-synthesized p-type ZnSe nanowires, for fabricating radial 1-D ZnSe-CdS nano-heterojunctions. The nano-heterojunctions exhibited excellent optoelectronic properties. Under blue/violet light, the nano-heterojunctions obtained a response radio of ∼5 × 10 3 , a responsitivity of ∼1.43 A/W, a gain of ∼3.78 and a detectivity of ∼0.57 × 10 12 cmHz 1/2 W −1 at zero bias. Furthermore, the nano-heterojunction also showed obvious photovoltaic characteristic with a power conversion efficiency of ∼0.96%. This method is expected to play an important role in nano-heterojunction construction and their device applications.
研究领域:
材料科学
·
纳米技术
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jian Li,Wenbin Luo,Zhen Zhang,Fenghong Li,Zisheng Chao,JinCheng Fan
Advances in cathode material design and understanding of intercalation mechanisms are necessary to improve the overall performance of aluminum ion batteries . Therefore, we designed ZnSe/SnSe 2 hollow microcubes with heterojunction structure as a cathode material for aluminum ion batteries. ZnSe/SnSe 2 hollow microcubes with an average size of about 1.4 µm were prepared by selenization of ZnSn(OH) 6 microcubes successfully. The shell thickness of ZnSe/SnSe 2 hollow microcubes is about 250 nm. On one hand, the hollow cubic structure can effectively alleviate the volume effect, provide shorter ion diffusion paths, and increase the contact area with the electrolyte. On the other hand, ZnSe/SnSe 2 heterojunction structure can establish a built-in electric field to facilitate ion transport. The synergistic effect of the two leads to the improved electrochemical performance of ZnSe/SnSe 2 as the cathode of aluminum ion batteries. The material delivered a reversible capacity of 124 mAh/g after 150 cycles at a current density of 100 mA/g. Meanwhile, coulombic efficiency remained above 98% in almost all cycles. In addition, the electrochemical reaction mechanism and kinetic process of Al 3+ and ZnSe/SnSe 2 were studied.
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
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2015
·Vol. 15
·期 6
·4648-4652
·
IF 1.556
Li Yansheng,Wang Wenqian,Zhao Dan,Chen Peng,Du Hongwu,Wen Yongqiang,Zhang Xueji
In this manuscript, we demonstrate a novel, facile and environmentally friendly method to directly obtain CdTe/ZnSe core/shell QDs in the aqueous phase based on the method of epitaxial growth of ZnSe shells on CdTe cores. The ZnSe shell and the capping reagent glutathione of the CdTe/ZnSe
core/shell QDs greatly increased the biocompatibility and stability of the original CdTe cores. The optical property of the as-prepared CZ QDs could be controlled by precisely adjusting the size of CdTe cores, which showed broad emission spectra from 530 to 688 nm. The crystalline structure
of the CZ QDs was extensively characterized by XRD, TEM and HRTEM, etc. Furthermore, since there were several functional groups on glutathione molecules, the QDs could be potentially used for connecting other functional small molecules, biomolecules or nanoparticles. Such QDs have bright future
perspectives in the development biological and nanomedical fields.
研究领域:
纳米医学
·
生物学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Wei Liu,Ding Gu,Xiaogan Li
Detection of ultralow concentrations of the hazardous gases is the major demand and challenge for the development of biosensors. A novel mesoporous ZnSe-core/SnO 2 -shell microspheres based chemiresistive-type sensor was fabricated for ppb-level NO 2 detection, and the theoretical detection limit is calculated to be 0.87 ppb. The as-fabricated sensor presents an excellent performance for low-concentrations of NO 2 up to 2.4 ppm and exhibits significantly higher response approximately 6.94 than those of pristine SnO 2 (∼2.86) and ZnSe based sensors (almost no response) to 2.4 ppm NO 2 at 160 °C. The response and recovery time of the core-shell microspheres based sensor are 64 s and 52 s, respectively, which are substantially improved compared to those of the pristine SnO 2 based sensor (∼149 s and ∼133 s). The sensor demonstrates a superior long-term stability with a deviation in the response of the sensor less than 5 % for one month, and a brilliant selectivity to several possible interferents. The significantly improved sensing performance could be attributed to the obtained mesoporous structures and the formed ZnSe/SnO 2 hybrid interfaces. It yields more active sites and promotes the electrons transferred between ZnSe and SnO 2 nanocrystals. The density functional theory (DFT) calculations are employed to reveal the potential transducing mechanisms.
研究领域:
材料科学
·
环境科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Tiewei Zhao,Guoqing Feng,Lingling Zhou,Xin Wang,Xiaoqin Li,Feng Jiang,Huiyu Li,Yongsheng Liu,Qing Yu,Haijing Cao,Yan Xu,Yanyan Zhu
High-capacity SnSe2 cathode materials combine the advantages of conversion and alloying reactions, showing great prospects in supercapacitors. However, they have poor cycling performance and low electronic conductivity. To effectively improve their electrochemical performance, a bimetallic selenide heterostructure was constructed and a three-dimensional graphene (3DG) carbon layer was encapsulated. 3DG increases the specific surface areas of the material, stabilizes the internal structures, and promotes the reaction kinetics. The obvious lattice distortions and mismatches at the ZnSe–SnSe2 heterointerfaces generate a large number of crystal defects and active sites for the adsorption/desorption of OH– ions, which is beneficial for the insertion and extraction of ions during the cycling processes and further enhances the electronic conductivity of the electrode material. Benefiting from these two strategies, 3DG/ZnSe–SnSe2 exhibits a high specific capacity of 1515.2 F g–1 at 1 A g–1 and maintains a capacity retention rate of 90.1% after 3000 cycles at 5 A g–1. Furthermore, the asymmetric supercapacitor 3DG/ZnSe–SnSe2//AC assembled with activated carbon (AC) exhibits excellent electrochemical performance, demonstrating an energy density of 25.3 Wh kg–1 at 750 W kg–1 and a remarkable capacity retention rate of 91.3% after 20,000 cycles at 5 A g–1.
研究领域:
材料科学
·
能源存储与转换
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Wei Liu,Ding Gu,Xiaogan Li
Mesoporous ZnSe/ZnO heterojunctions were prepared by the in situ thermal oxidation of ZnSe at elevated temperatures in air. The partial replacement of selenium by oxygen in the ZnSe nanoflakes led to a highly porous microstructure with 8.2 nm mesopores distributed fairly uniformly within the formed heterojunction sample. The as-fabricated mesoporous ZnSe/ZnO heterojunction-based sensor exhibits an approximately 7.3-fold significantly higher response than those of both pristine ZnO- and ZnSe-based sensors when exposed to 8 ppm NO2 at 200 °C. This sensor also demonstrates excellent selectivity for methanol, ethanol, acetone, benzene, methylbenzene, ammonia, and formaldehyde. The significantly enhanced response of the ZnSe/ZnO-based sensor is due to the mesoporous microstructure during thermal oxidation of ZnSe to ZnO, yielding more active sites and the accumulation of electrons in the ZnO nanocrystals transferred between ZnSe/ZnO interfaces.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 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）