ENERGY & FUELS
·
2024
·
IF 5.2
Lijuan Peng,Jiahuan Zhong,Chengkai Zhang,Yaohao Zhang,Dingsheng Yuan
Flexible quasi-solid zinc–air batteries, known for their efficiency and promising potential as an energy storage system, have found extensive applications in the fields of portable power supply, wildlife rescue, and flexible wearable devices. Herein, a FeNx/ZnSe/Fe heterojunction nanocomposite anchored on leafy nitrogen-doped carbon (FeNx/ZnSe/Fe–NC) is developed as a highly active bifunctional catalyst via one-step high-temperature selenization of Fe-doped zeolitic imidazolate frameworks 8. The formation of the heterostructure FeNx/ZnSe/Fe is conducive to accelerating electron transfer and improving the activity of the oxygen reduction reaction and oxygen evolution reaction. Moreover, FeNx/ZnSe/Fe–NC exhibits exceptional performance in liquid Zn–air batteries, comparable to the potency of industrially produced catalysts fabricated from precious metals. Notably, the gel polymer electrolyte (GPE) with a double-network structure, composed of poly(vinyl alcohol)- and polyacrylamide-modified with dimethyl sulfoxide (PVA–PAM–DMSO), exhibits significantly higher conductivity (193.5 mS cm–1) and excellent water retention (93.6%). As a result of the FeNx/ZnSe/Fe–NC catalyst and PVA–PAM–DMSO GPE, a flexible Zn–air battery with high-rate capability has been achieved, which demonstrates a high open-circuit potential of 1.51 V. This battery displays exceptional performance with excellent durability, adaptability, and adjustment capacity across a broad temperature range.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Zhou Peng,Zhang Mingyu,Wang Liping,Huang Qizhong,Su Zhean,Li Liewu,Wang Xiaodong,Li Yuhao,Zeng Chen,Guo Zhenghao
ZnSe nitrogen-doped carbon composite nanofibers (ZnSe@N-CNFs) were derived as anode materials from selenization of electrospinning nanofibers. Electron microscopy shows that ZnSe nanoparticles are distributed in electrospinning nanofibers after selenization. Electrochemistry tests were carried out and the results show the one-dimensional carbon composite nanofibers reveal a great structural stability and electrochemistry performance by the enhanced synergistic effect with ZnSe. Even at a current density of 2 A g−1, the as-prepared electrodes can still reach up to 701.7 mA h g−1 after 600 cycles in lithium-ion batteries and 368.9 mA h g−1 after 200 cycles in sodium-ion batteries, respectively. ZnSe@N-CNFs with long cycle life and high capacity at high current density implies its promising future for the next generation application of energy storage.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Yuan Liu,Gongxun Bai,Yongxin Lyu,Youjie Hua,Renguang Ye,Junjie Zhang,Liang Chen,Shiqing Xu,Jianhua Hao
Realizing multicolored luminescence in two-dimensional (2D) nanomaterials would afford potential for a range of next-generation nanoscale optoelectronic devices. Moreover, combining fine structured spectral line emission and detection may further enrich the studies and applications of functional nanomaterials. Herein, a lanthanide doping strategy has been utilized for the synthesis of 2D ZnSe:Er3+ nanosheets to achieve fine-structured, multicolor luminescence spectra. Simultaneous upconversion and downconversion emission is realized, which can cover an ultrabroadband optical range, from ultraviolet through visible to the near-infrared region. By investigating the low-temperature fine structure of emission spectra at 4 K, we have observed an abundance of sublevel electronic energy transitions, elucidating the electronic structure of Er3+ ions in the 2D ZnSe nanosheet. As the temperature is varied, these nanosheets exhibit tunable multicolored luminescence under 980 and 365 nm excitation. Utilizing the distinct sublevel transitions of Er3+ ions, the developed 2D ZnSe:Er3+ optical temperature sensor shows high absolute (15.23% K–1) and relative sensitivity (8.61% K–1), which is superior to conventional Er3+-activated upconversion luminescent nanothermometers. These findings imply that Er3+-doped ZnSe nanomaterials with direct and wide band gap have the potential for applications in future low-dimensional photonic and sensing devices at the 2D limit.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 39
·15044-15055
·
IF 7.367
Dong Li,Guanjie Xing,Shilin Tang,Xiaohong Li,Louzhen Fan,Yunchao Li
We report herein a heat-triggered precursor slow releasing route for the one-pot synthesis of ultrathin ZnSe nanowires (NWs), which relies on the gradual dissolving of Se powder into oleylamine containing a soluble Zn precursor under heating. This route allows the reaction system to maintain a high monomer concentration throughout the entire reaction process, thus enabling the generation of ZnSe NWs with diameter down to 2.1 nm and length approaching 400 nm. The size-dependent optical properties and band-edge energy levels of the ZnSe NWs were then explored in depth by UV-visible spectroscopy and cyclic voltammetry, respectively. Considering their unique absorption properties, these NWs were specially utilized for fabricating photoelectrochemical-type photodetectors (PDs). Impressively, the PDs based on the ZnSe NWs with diameters of 2.1 and 4.5 nm exhibited excellent responses to UVA and near-visible light, respectively: both possessed ultrahigh on/off ratios (5150 for UVA and 4213 for near-visible light) and ultrawide linear response ranges (from 2.0 to 9000 μW cm−2 for UVA and 5.0 to 8000 μW cm−2 for near-visible light). Furthermore, these ZnSe NWs were selectively doped with various amounts of Mn2+ to tune their emission properties. As a result, ZnSe NW film-based photochromic cards were creatively developed for visually detecting UVA and near-visible radiation.
研究领域:
材料科学
·
光电材料
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 29
·9634-9642
·
IF 4.099
Shuqi Lu,Shanglong Peng,Zhiya Zhang,Yunlong Deng,Tianfeng Qin,Juanjuan Huang,Fei Ma,Juan Hou,Guozhong Cao
Surface passivation in quantum dot-sensitized solar cells (QDSSCs) plays a very important role in preventing surface charge recombination and thus enhancing the power conversion efficiency (PCE). ZnSe passivation with dopant in CdS/CdSe co-sensitized QDSSCs has been demonstrated as an effective way to improve the PCE. In the present study, a series of characterizations revealed that a Mn-doped ZnSe passivation layer can not only reduce surface charge recombination, but also enhance light harvesting. By means of density functional theory calculation along with a systematic study of electronic band structure, it has been found that the valence band of ZnSe moves upward on Mn-ion doping which leads to acceleration of charge separation and broader light absorption range. The impact of the Mn ion on charge recombination and light harvesting has been interpreted reasonably and the PCE of CdS/CdSe co-sensitized QDSSCs with Mn-doped ZnSe passivation layer is as high as 6.46%, which is 1.5 times that of the solar cell without the passivation layer.
研究领域:
材料科学
·
能源科学
·
计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Changlin Li,Yanfang Wang,Shangrong Chen,Wei Zhang,Zi Wang,Zhongyu Hou
The erosion issue of ZnO nanorod arrays (NRAs) film is the major obstacle in surface sensitization of ZnO NRAs grown on Zn foil substrate for photoelectrochemical (PEC) applications. In this paper, PEC performance of ZnO NRAs grown on Zn foil substrate was greatly enhanced by coating ZnSe and CdSe on the surface of ZnO NRAs. Dense ZnO NRAs were in - situ grown on seed-free Zn foil substrate in a NH 3 ·H 2 O and NaOH hydrothermal system. ZnSe/CdSe co-sensitized ZnO heterostructures were then successfully synthesized using ZnO NRAs as precursors by two successive in - situ ion exchanges without damaging Zn foil and ZnO NRAs film. To obtain optimal photoconversion efficiency, anion exchange time and temperature were optimized. ZnO/ZnSe/CdSe heterostructures with optimized structure were shown as a layer of compact ZnSe/CdSe nanofilm conformally and uniformly coated on ZnO NRAs, which leads to efficient separation of photogenerated carriers , significant enhancement in visible-light absorption, and excellent PEC performance with photocurrent density of 3.008 mA/cm 2 (−0.2 V vs . Ag/AgCl) and photoconversion efficiency of 1.99% (0.418 V vs . RHE in polysulfide electrolyte solution), 27.55 and 40.61 times higher than those of ZnO NRAs, respectively.
研究领域:
材料科学
·
光电化学
·
纳米技术
·
能源材料
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Junrui Zhou,Bowei Li,Anjin Qi,Yajun Shi,Ji Qi,Huizhong Xu,Lingxin Chen
In this study, a newly fluorescent ZnSe quantum dots (QDs) with ion imprinting technology was firstly realized on the three-dimensional (3D) rotary paper–based microfluidic chip platform which can be used to realize specific and multiplexed detection of Cadmium ions (Cd 2+ ) and Lead ions (Pb 2+ ). Compared to CdTe quantum dots, ZnSe quantum dots are less toxic and more environmental friendly. In addition, this design improved the portability of the device by transferred the liquid phase of ZnSe QDs@ion imprinted polymers to solid glass fiber paper. Moreover, the 3D rotary microfluidic chip ( μ PADs) showed great advantages including low cost, simple and fast facile operation, multiplexed detection, and showed good sensitivity and selectivity. Under optimal experiment conditions, our proposed method was enabled to realize specific and multi-channel determination of Cd 2+ and Pb 2+ ions. The developed sensor of Cd 2+ μ PADs provided a linear response from 1 to 70 μg/L with a lower detection limit of 0.245 μg/L, and Pb 2+ μ PADs provided a linear response from 1 to 60 μg/L with a lower detection limit of 0.335 μg/L, respectively. Excitingly, this newly designed 3D rotary μ PADs exhibited quantitative information conveniently, which showed the promising application prospects to rapid testing target metal ions in environmental in the future.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Guoli Xu,Zhi Zhang,Tao Li,Meiling Du,Yueping Guan,Chen Guo
In this study, a sea urchin-like Fe 3 O 4 /ZnO/ZnSe hierarchical heterostructured photocatalyst was successfully prepared via a convenient synthetic strategy and combined with a newly designed photocatalytic magnetically fixed bed reactor (PMFBR) to continuously photodegrade pollutants under simulated solar light irradiation. In the experiment, ZnO nanorods were first grafted onto the surfaces of hollow Fe 3 O 4 nanoparticles, and then ZnSe nanoparticles were uniformly distributed on the ZnO nanorods, the obtained Fe 3 O 4 /ZnO/ZnSe composite exhibited three-dimensional structure and excellent magnetic response. Through citing PMFBR, a stable and homogeneously distributed heterogeneous catalyst, efficient light distribution, and good mass transfer of reactants were achieved. As a result, the Fe 3 O 4 /ZnO/ZnSe composite in the PMFBR showed excellent photocatalytic capacity with a continuous process. The combination of the magnetic photocatalyst and PMFBR transformed the reaction mode from cumbersome intermittent operation to a simple continuous-flow photocatalytic style. It is hoped that this continuous photocatalytic system could provide a new idea for large-scale wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 47
·2004580
·
IF 11.459
Caifu Dong,Leqiang Wu,Yanyan He,Yanli Zhou,Xiuping Sun,Wei Du,Xueqin Sun,Liqiang Xu,Fuyi Jiang
ZnSe is regarded as a promising anode material for energy storage due to its high theoretical capacity and environment friendliness. Nevertheless, it is still a significant challenge to obtain superior electrode materials with stable performance owing to the serious volume change and aggregation upon cycling. Herein, a willow-leaf-like nitrogen-doped carbon-coated ZnSe (ZnSe@NC) composite synthesized through facile solvothermal and subsequent selenization process is beneficial to expose more active sites and facilitate the fast electron/ion transmission. These merits significantly enhance the electrochemical performances of ZnSe@NC for sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs). The obtained ZnSe@NC exhibits outstanding rate performance (440.3 mAh g −1 at 0.1 A g −1 and 144.4 mAh g −1 at 10 A g −1 ) and ultralong cycle stability (242.2 mAh g −1 at 8.0 A g −1 even after 3200 cycles) for SIBs. It is noted that 106.5 mAh g −1 can be retained after 550 cycles and 71.4 mAh g −1 is still remained after 1500 cycles at 200 mA g −1 when applied as anode for PIBs, indicating good cycle stability of the electrode. The possible electrochemical mechanism and the ionic diffusion kinetics of the ZnSe@NC are investigated using ex situ X-ray diffraction, high-resolution transmission electron microscopy, and a series of electrochemical analyses.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yuzhen Jiao,Yajie Chen,Wei Han,Shumei Liang,Wei Li,Guohui Tian
Metal-organic frameworks-based hybrids with desirable components, structures, and properties have been proven to be promising functional materials for photocatalysis and energy conversion applications. Herein, we proposed and prepared ZnSe sensitized hierarchical TiO 2 nanosheets encapsulated MIL-125(Ti) hollow nanodisks with sandwich-like structure (MIL-125(Ti)@TiO 2 \ZnSe HNDs) through a successive solvothermal and selenylation reaction route using the as-prepared MIL-125(Ti) nanodisks as precursor. In the ternary MIL-125(Ti)@TiO 2 \ZnSe HNDs hybrid, TiO 2 nanosheets were transformed from MIL-125(Ti) and in situ grown on both sides of the MIL-125(Ti) shell, forming sandwich-like hollow nanodisks, and the ratio of MIL-125(Ti)/TiO 2 can be tuned by changing the solvothermal time. The ternary hybrids possess the advantages of enhanced incident light utilization and abundant accessible active sites originating from bimodal pore-size distribution and hollow sandwich-like heterostructure, which can effectively promote CO 2 photoreduction reaction. Especially, the formed multi-channel charge transfer routes in the ternary heterojunctions contribute to the charge transfer/separation and extend the lifespan of charge-separated state, thus boosting CO 2 photoreduction performance. The CO (513.1 μmol g −1 h −1 ) and CH 4 (45.1 μmol g −1 h −1 ) evolution rates over the optimized ternary hybrid were greatly enhanced compared with the single-component and binary hybrid photocatalysts.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Physics
·
2022
·
IF 11.021
Qiqin Liang,Jingjing Zhang,Xiaosi Qi,Lei Wang,Junfei Ding,Xiu Gong,Jingliang Yang,Yanli Chen,Yunpeng Qu,Qiong Peng,Wei Zhong
The selenylation/sulfuration of magnetic precursor brings about the great challenges to construct magnetic transition metal dichalcogenides (TMDs)-based multicomponent nanocomposites (MCNCs), which greatly hinders the improvements in magnetic loss ability and impedance matching characteristic. Theoretically speaking, the addition of carbon layer is conducive to protect the magnetic nanoparticles, optimize the impedance matching, strengthen the interfacial polarization and magnetic loss abilities, and so on. In order to verify these ideas, herein, we elaborately designed and produced core@shell ZnSe/FeSe 2 @MoSe 2 and core@shell@shell ZnFe 2 O 4 @C@MoSe 2 flower-like MCNCs. The results of comparative study indicated that the as-prepared ZnSe/FeSe 2 @MoSe 2 and ZnFe 2 O 4 @C@MoSe 2 with the different MoSe 2 contents and flower-like geometrical morphologies could be synthesized by regulating the amounts of Mo and Se sources. And the introduction of carbon layer not only effectively inhibited the selenylation of ZnFe 2 O 4 precursor, but also greatly improved the impedance matching characteristic, dielectric and magnetic loss capabilities. The obtained ZnFe 2 O 4 @C@MoSe 2 MCNCs presented the excellent comprehensive microwave absorption properties (MAPs) including strong absorption capability, broad frequency bandwidth and thin matching thickness. Therefore, our findings not only presented a simple and viable route to produce magnetic TMDs-based MCNCs, but also provided an effective strategy to boost their comprehensive MAPs.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 8
·2824-2835
·
IF 7.367
Zhi-Qiang Zhou,Li-Yun Yang,Ren Yan,Jie Zhao,Yu-Qi Liu,Lu Lai,Feng-Lei Jiang,Thomas Maskow,Yi Liu
Although cation exchange (CE) has been studied for many years and some mechanisms were proposed, there is still a knowledge gap in CE and problems such as the need for high temperature and it being time-consuming are still unaddressed. We developed a new mild strategy for CE by introducing a new ideal template and first applied this doping strategy to detect Cd2+ and Hg2+. This strategy adopted Mn-doped ZnSe quantum dots (QDs) as the template and the introduction occurs via a two-step CE reaction: first Zn2+ was partially substituted by X (X = Cd2+, Hg2+, Cu2+, Ag+ or Pb2+), later Mn2+ (in the deep structure of QDs) was substituted by X. Remarkably, Mn2+ in the lattice can be easily substituted by a dopant and its replacement by a dopant helps to bury the metal ions. The ultra-fast introduction of Cd2+ and Hg2+ (70 minutes for Cd2+ and 19 minutes for Hg2+) was realized at room temperature; other metal ions such as Ag+, Cu2+ and Pb2+ can be buried at 50 °C. This mild reaction temperature offers a solution for introducing impurities without sacrificing the interfacial structure of nanocrystals. HRTEM, XPS and ICP measurements were applied to analyze the introduction process. Furthermore, the spectroscopic method was employed to analyze the introduction, migration and distribution of metal ions. Then, we proposed a mechanism for the chemical conversion of nanocrystals by CE. Through this strategy, full-color light-emitting doped QDs were fabricated. Strikingly, a new turn-on probe for the detection of Cd2+ and Hg2+ with improved selectivity was developed by adopting this doping strategy. The detection limit is 36 nM for Cd2+ and 20 nM for Hg2+, which is competitive with the limit of detection reported by other groups using QDs as sensors.
研究领域:
材料科学
·
化学
·
环境科学
✓ 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）