EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2021
·Vol. 2022
·期 4
·e202100944
·
IF 2.524
Yichang Lin,Sheng Liu
Graphical Photocathodic protection is promising to harvest solar light for corrosion protection of metals. Benefiting from a considerably enhanced absorption for visible light and a significantly increased transfer efficiency for photogenerated charges, the as-prepared ZnO/ZnSe/CdSe photoanode exhibits a superior photocathodic protection performance for the coupled 304 stainless steel under illumination. Photocathodic protection technology is emerging to harvest solar light for electrochemical corrosion protection of metals. Herein, ZnO/ZnSe/CdSe heterostructured nanowire arrays were synthesized on conductive glass substrates by a two-step ion-exchange reaction in ZnO nanowire arrays. The as-prepared ZnO/ZnSe/CdSe core/shell nanostructure was unveiled by XRD, SEM, TEM, EDAX elemental mapping, and XPS analyses. The ZnO/ZnSe/CdSe ternary heterojunction photoanode exhibits a considerably enhanced absorption for visible light and a significantly increased separation, transfer, and collection efficiencies for photogenerated charges. When working as photoanodes, the as-deigned ZnO/ZnSe/CdSe heterostructured nanowire arrays demonstrates a superior photocathodic protection performance for the coupled 304 stainless steel under illumination with AM 1.5G.
研究领域:
材料科学
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纳米技术
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电化学
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腐蚀防护
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可再生能源
✓ 已验证
DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2019
·
IF 1.573
Junli Wang,Yajie Qiao,Tingting Wang,Kangmin Chen
In this work, we combine the catalytic growth and ligand control mechanisms to synthesize ultrathin/ultralong ZnSe nanowires (NWs). Ag 2 Se catalyst seeds initiate the NW growth and significantly cause the increase of the NW lengths up to several micrometers. The long-chain amine mixture of oleylamine and 1-dodecylamine acts as reaction medium and ligands (or surfactants) to control the sizes of Ag 2 Se seeds and ZnSe NWs within several nanometers (the mean diameter of NWs: ∼5.5 nm). The microstructure studies by HRTEM reveal the presence of zinc blende (ZB)/wurtzite (W) alternations and a number of stacking faults and twins within individual ZnSe ultrathin NWs. These NWs exhibit optical quantum confinement effect due to the diameters smaller than the theoretical exciton Bohr diameter of bulk ZnSe. Raman spectrum and photoelectronic performance under white light illumination are also presented.
研究领域:
材料科学
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纳米技术
·
光学
·
固体物理
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 7
·1-11
·
IF 5.479
Xing Xinxin,Yang Yue,Zou Tong,Wang Zhezhe,Wang Zidong,Zhao Rongjun,Zhang Xu,Wang Yude
Thioglycolic acid-functionalized ZnSe quantum dots (QDs) as a colorimetric nanoprobe were prepared and applied to the determination of cobalt(II) and iron(III). Test strips were obtained by a dipping-drying process. On exposure to Co(II), they undergo a color change from white to brown, and on exposure to Fe(III) from white to pink. The limits of detection (LOD) are 2.6 mg L −1 for Co(II) and 2.2 mg L −1 for Fe(III). Test strips introduce a low-cost, portable, rapid and convenient tool for determination of Co(II) and Fe(III). In addition, two other analytical methods have been studied for detection of Co(II) and Fe(III) at low concentration. The first is UV-vis spectrometry which has a LOD as low as 0.14 mg L −1 for Co(II) (at 412 nm) and 0.12 mg L −1 for Fe(III) (at 400 nm). The second is dynamic light scattering (DLS) with a LOD of 3.0 μg L −1 for Co(II) and 2.5 μg L −1 for Fe(III).
Thioglycolic acid-functionalized ZnSe quantum dots (TGA-ZnSe QDs) show high sensitivity and low detection limits for Co 2+ and Fe 3+ .
研究领域:
分析化学
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纳米技术
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Keting Feng,Kangqi Wu,Kai Li,Weijun Wang,Shihui Gao,Jun Fan,Tao Sun,Enzhou Liu
Localized surface plasmon resonance (LSPR) effect plays a crucial role in the field of solar energy utilization. In this work, we successfully prepared a Cu 2-x Se/ZnSe S-scheme heterojunction with a broad-spectrum response using the hot-injection and low-temperature water bath method. Importantly, we demonstrated that the photothermal effect induced by the LSPR of nonstoichiometric Cu 2-x Se can significantly improve the slow kinetics of water splitting, resulting in an apparent activation energy reduction from 50.1 to 28.7 kJ·mol −1 . This improvement is responsible for achieving the highest photocatalytic H 2 evolution rate of 63.6 mmol·g −1 ·h −1 over 2.7 % Cu 2-x Se/ZnSe under the wavelength ranged from 200 to 2500 nm, which is 3.4 and 5.6 times higher than that of ZnSe and Cu 2-x Se, respectively. Furthermore, the composite exhibits a remarkable H 2 production rate of 0.108 mmol·g −1 ·h −1 under near-infrared spectroscopy (800<λ<2500 nm), while ZnSe shows limited capability in H 2 releasing. Additionally, Cu 2-x Se/ZnSe demonstrates distinct photocurrent response when λ > 800 nm. The enhanced performance in H 2 evolution can be attributed to the synergistic effect of LSPR-induced light absorption and S-scheme heterojunction, which not only expands the light absorption range to the near-infrared region but also facilitates hot electron injection, charge carrier separation and transfer, leading to a faster surface reaction kinetics. This study provides an effective approach for designing a broad-spectrum light responsive non-precious metal-based photothermal-assisted photocatalytic system.
研究领域:
材料科学
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光催化
·
太阳能利用
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纳米技术
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物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Jinke Bai,Tianyi Hou,Meilun Zhang,Peilin Ou,Xiao Jin,Qinghua Li,Zisheng Su,Zeqiang Chen,Yuxiao Wang,Xueru Zhang,Yinglin Song
Environmentally friendly zinc selenide (ZnSe) based core/shell quantum dots (QDs) are promising emitting materials for special light sources and displays. However, ZnSe-based core/shell QDs with violet-blue emission that simultaneously possess thick shells and narrow emission linewidths are still challenging thus far. We herein use a gradient ZnSe x S 1-x /ZnS shell strategy to target this goal. The ZnSe x S 1-x mid shell helps the lattice strain relaxation during the growth, whereas the wide bandgap ZnS outer shell benefits the optical properties by passivating the emitting cores and improving the quantum confinement effect. These ZnSe core QDs show a unity zinc blende structure and high crystallinity . The optimized ZnSe/ZnSe x S 1-x /ZnS QDs exhibit tunable emission wavelengths (415–445 nm), narrow photoluminescence linewidths (10.2–14.2 nm), thick shells (>3.9 nm), and high photoluminescence quantum yields (>50%). We postulate that these excellent features are due to the use of alloyed ZnSe x S 1-x layer at the core/shell interfaces. This study provides a feasible idea for the development of blue ZnSe-based QDs with perfect emitting properties.
研究领域:
材料科学
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纳米技术
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Zhongyuan Guan,Yang Huang,Zhaojin Wang,Jiayun Sun,Chengwei Shan,Yiguo Xu,Dan Wu,Aiwei Tang,Xiao Wei Sun,Kai Wang
The development of cadmium-free blue quantum dots (QDs) is of paramount importance to the display industry. In this study, high-quality ZnSeTe/ZnSe/ZnS blue QDs, followed by surface treatment with ZnI 2 are initially synthesized. The introduction of ZnI 2 passivated the surface defects, resulting in an increase in the fluorescence quantum yield. The time-resolved photoluminescence (TRPL) demonstrates a significant inhibition of non-radiative recombination associated with the surface defect state. The density functional theory (DFT) calculation reveals that the binding energy between iodine ions and zinc ions is higher than that between oleate ions and zinc ions, providing a theoretical basis for the effective passivation of the suspended bonds of zinc ions on QDs' surface by iodine ions. Moreover, quantum dot light-emitting diodes (QLEDs) are fabricated and UV photoelectron spectra (UPS) indicate the hole injection barrier between the hole transport layer and QDs decreases 0.12 eV after QDs being treated by ZnI 2 , facilitating hole injection. Finally, The ZnI 2 -treated QLED demonstrates a 1.57-fold and 1.82-fold improvement in L max and EQE max , respectively, reaching 6370 cd m −2 and 9.1%, compared to the pristine QLED. The work serves as a valuable reference for enhancing the performance of cadmium-free blue QLED.
研究领域:
材料科学
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纳米技术
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光电子学
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 41
·8152-8160
·
IF 4.543
Jie Zhang,Jie Wang,Tong Yan,Yanan Peng,Dajun Xu,Dawei Deng
Quantum dots (QDs) exhibit many unique optical properties, and show great promise as fluorescent markers in molecular, cellular and in vivo imaging. In this thematic issue, a major concern is their cytotoxicity. Among various Cd-free alternatives, InP-based QDs without highly toxic heavy metal elements have received the most attention. This article first focuses on the synthetic control of oil-soluble InP/ZnSe/ZnS QDs, exhibiting strong dual emissions, namely, visible excitonic emission and near-infrared (NIR) surface defect emission. Next, the organic-to-aqueous phase transfer of the dual emissive QDs was explored systematically. It was found that the dual emissions are relatively stable against the water transfer strategies used here; among them, aqueous dual emissive QDs obtained by wrapping oil-soluble QDs with a poly(acrylic acid)-octylamine (PAA-based) amphiphilic polymer (or modified with the cRGD peptide) exhibit enhanced NIR emission. Finally, using in vitro cell and in vivo small animal optical imaging techniques, the bioactivities of the cRGD-modified amphiphilic polymer-wrapped QDs were also investigated. The results confirm that single-wavelength excitation with strong dual emissions ranging from 550 to >1000 nm will endow the InP-based QDs with the capability for biomedical optical imaging across different spatial scales, as a promising alternative for Cd- and Pb-based QDs.
研究领域:
材料科学
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纳米技术
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生物医学工程
·
光学成像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF PHYSICS
·
2021
·Vol. 23
·期 3
·033019
·
IF 3.732
Bingsuo Zou,Lipeng Hou,Ye Tian,Junbo Han,Hui Peng,Xiongtao Yang,Lijie Shi
The magnetic excitons in diluted magnetic semiconductor (DMS) have varied formats due to the inhomogeneous phases out of doping concentration and/or structural relaxations or defects. Here the high quality cobalt-doped zinc blende ZnSe nanoribbons (NRs) were synthesized, showing bright and color-variable emissions from blue, yellow to a little mixed white colors. Their power and temperature dependent micro-photoluminescence (PL) spectra have been obtained in which two emission bands, one magnetic exciton band near the band-edge and a Co2+ high-level d–d transition emission band at 550 nm out of their ferromagnetic (FM) coupled aggregates in ZnSe lattice, both bands could also be reflected by a nonlinear optical absorption enhancement. The easy formed stacking fault defects in a chemical vapor deposition (CVD) grown ZnSe zincblende NR took part in the above optical processes out of magnetic polaronic excitons (PXs). The femtosecond (fs) laser pulse pumping on single ZnSe:Co NR produces obvious lasing behavior but with profile of a complicated magnetic exciton interactions with indication of a crossover from collective exciton magnetic polarons (EMP) to bound magnetic polaron (BMP) scattering in Co doped ZnSe NR. These findings indicate the complication of the magnetic coupling natures in varied DMS structures, whose optical properties have been found to be highly nonlinear, due to the involvement of the spin–spin, spin–exciton and spin–phonon interactions, verified by the theoretic calculation in Yang X-T et al (2019 Interstitial Zn-modulated ferromagnetism in Co-doped ZnSe Mater. Res. Express 6 106121).
研究领域:
材料科学
·
光学
·
半导体物理
·
纳米技术
·
磁学
✓ 已验证
DOI
高影响因子
Journal of the Korean Ceramic Society
·
2025
·
IF 3.8
Zhang Feng-Jun,Zhang Jun-Jie,Zhu Meng-Yuan,Wang Ying-Rui,Li Dong-Cai,Oh Won-Chun
Cu 2 MoS 4 became a novel active alternative material to noble metal co-catalysts, which can effectively promote photocatalytic hydrogen evolution. To investigate the effect of Cu 2 MoS 4 on the photocatalytic performance of Zn-VIA compounds, ZnO, ZnS, ZnSe, and ZnTe were composited with Cu 2 MoS 4 to construct the photocatalysts, and we analyzed the four catalysts for the crystal structure, microscopic morphology, photoelectronic properties, and hydrogen evolution performance. Comparing the four different photocatalysts, the composite of ZnSe and Cu 2 MoS 4 has the highest photocatalytic hydrogen evolution efficiency, and the hydrogen evolution rate of the optimal ratio of ZSeC-20 reaches about 2617 μmol/g/h, which is about 46 times higher than that of pure ZnSe. It is attributed to the loading of Cu 2 MoS 4 to build a heterogeneous structure, which reduces the photogenerated electron and hole recombination rate, which enhances the photocatalytic water splitting hydrogen evolution rate.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2016
·Vol. 7
·期 1
·
IF 1.726
Lipeng Hou,Cheng Chen,Li Zhang,Qiankun Xu,Xinxin Yang,Muhammad Ismail Farooq,Junbo Han,Ruibin Liu,Yongyou Zhang,Lijie Shi
Spin-related emission properties have important applications in the future information technology; however, they involve microscopic ferromagnetic coupling, antiferromagnetic or ferrimagnetic coupling between transition metal ions and excitons, ordstate coupling with phonons is not well understood in these diluted magnetic semiconductors (DMS). Fe3+doped ZnSe nanoribbons, as a DMS example, have been successfully prepared by a thermal evaporation method. Their power-dependent micro-photoluminescence (PL) spectra and temperature-dependent PL spectra of a single ZnSe:Fe nanoribbon have been obtained and demonstrated that alio-valence ion doping diminishes the exciton magnetic polaron (EMP) effect by introducing exceeded charges. Thed-dtransition emission peaks of Fe3+assigned to the4T2(G) →6A1(S) transition at 553 nm and4T1(G) →6A1(S) transition at 630 nm in the ZnSe lattice have been observed. The emission lifetimes and their temperature dependences have been obtained, which reflected different spin–phonon interactions. There exists a sharp decrease of PL lifetime at about 60 K, which hints at a magnetic phase transition. These spin–spin and spin–phonon interaction related PL phenomena are applicable in the future spin-related photonic nanodevices.
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2013
·
IF 4.814
Wenyan Liu,Yu Zhang,Weiwei Zhai,Yinghui Wang,Tieqiang Zhang,Pengfei Gu,Hairong Chu,Hanzhuang Zhang,Tian Cui,Yiding Wang,Jun Zhao,William W. Yu
Colloidal ZnCuInS/ZnSe/ZnS core/shell/shell quantum dots (QDs) with average particle sizes of 2.3, 2.7, and 3.3 nm were prepared in a noncoordinating solvent. The size-dependent optical band gap and photoluminescence (PL) band shift due to the quantum confinement effect were observed. Because the PL band showed a large Stokes shifts over 400 meV, the origin of the PL band was related to the electronic transition via defect levels. A time-resolved PL measurement indicated that the PL lifetime of the QDs was a characteristic feature of three dominating transitions from the conduction band to surface defect level, from the conduction band to an acceptor level, and from the donor level to an acceptor level. It was investigated as a function of temperature in the range from 50 to 373 K to understand the radiative and nonradiative relaxation processes and fitted with two empirical expressions, from which the Huang–Rhys factor and the phonon energy were calculated. According to the fitting data, the size-dependent parameters were analyzed including the Huang–Rhys factor, the average phonon energy, and the excitonic-acoustic phonon coupling coefficient. The temperature coefficient was about −2.32 × 10–4 eV/K. The results showed that, in the temperature range from 50 to 373 K, the variations of the energy band gap and the photoluminescence line broadening were predominantly due to an optical transition from the band edge to the defect-related level and the coupling of the carriers to acoustic phonon, respectively.
研究领域:
纳米材料
·
光电子学
·
量子点
·
光物理
·
固体物理
✓ 已验证
DOI
高影响因子
SEMICONDUCTORS
·
2026
·Vol. 60
·期 3
·276-283
·
IF 1
Xu Kai,Li Jingru,Liu Wenyan
s ZnCuInS/ZnSe/ZnS quantum dots (QDs) are a non-toxic and environmentally benign semiconductor material. Specifically, their tunable emission, high photoluminescence quantum yield (PLQY), and good stability make them promising candidates for applications such as light-emitting diodes (LEDs) and bioimaging. However, the expensive price of the rare metal element indium increases its preparation cost, thereby hindering the wider application of ZnCuInS-based QDs. Therefore, we propose to partially replace In with low-cost Al to produce ZnCuAlInS/ZnSe/ZnS core/shell/shell QDs, which reduces the cost to some extent. As a result, compared with ZnCuInS/ZnSe/ZnS QDs (ZCIS QDs) the ZnCuAlInS/ZnSe/ZnS QDs (ZCAIS QDs) exhibited a blue shifted photoluminescence (PL) spectrum, a narrower full width at half maximum (FWHM), and an approximately 95% increase in PLQY. The enhanced performance positions them as promising materials for optoelectronic applications. Furthermore, we fabricated white light-emitting diodes (WLEDs) composed of blue InGaN LED chips and ZCAIS QDs. The resulting White LED exhibited a warm-white emission with CIE 1931 chromaticity coordinates of (0.3284, 0.3277), a correlated color temperature (CCT) of 5690 K, and a luminance of 23130 cd/m 2 . This work provides a cost-effective, environmentally benign strategy for WLED production while establishing a foundation for future optimization of QD-based optoelectronic devices. Critically, the ZCAIS QDs exhibit strong potential as a substitute for conventional toxic (e.g., Cd/Pb-based) or expensive (e.g., InP-based) phosphors in solid-state lighting.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）