Journal of the American Chemical Society
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2025
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IF 15.6
Shangxin Lin,Chuanzhong Yan,Jie Zhu,Yida Lu,Xiaogang Peng
With CdTe nanocrystals as a model system, we discover a new synthetic strategy for control of size and size distribution of colloidal semiconductor nanocrystals in both nucleation and growth stages. Especially in the nucleation stage, an in situ-formed cadmium complex with approximately one alkanoate and one alkylphosphonate ligand enables both high-yield nucleation by reacting the reactive cadmium-carboxylate bond with Te precursors and efficient size control by immediate passivation with the close-proximity alkylphosphonate ligand from the same complex. Conversely, control on size distribution during either homoepitaxial or heteroepitaxial growth requires reactive cadmium (or zinc) alkanoates as the cationic precursors with a minimum concentration of alkylphosphonate ligands in the novel synergistic solvents. This new strategy not only yields monodisperse CdTe and CdTe/ZnSe core/shell nanocrystals with unprecedented optical quality but also provides a much-needed alternative route for synthesizing monodisperse semiconductor nanocrystals, which is commonly hindered by the growth barrier of the dense ligand monolayer.
研究领域:
材料科学
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化学
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DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 32
·期 8
·085101
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IF 3.551
Yang Sheng,Shuai Li,Yixin Sun,Rong Zhang,Xinyu Zhao,Mei Chee Tan
CuInSe2 quantum dots (QDs) are one of the most important Cd-free fluorescent probes; they usually exhibited low fluorescence intensity, suggesting that a considerable amount of absorbed photon energy was lost as heat. In this study we aimed to improve the fluorescence intensity of CuInSe2 QDs and investigate their photoacoustic (PA) signal resulting from the heat dissipation, which was previously rarely reported. Cu–In–Zn–Se/ZnSe QDs were synthesized by adopting two strategies of Zn doping and ZnSe shell growth. It was found that there was an upper limit for Zn concentration beyond which the fluorescence intensity began to decrease. In addition, a blue shift of the emission peak of Cu–In–Zn–Se/ZnSe QDs was observed at high concentrations of ZnSe precursor due to the diffusion of excessive Zn. To prepare the dual-modal fluorescence and PA imaging probe, poly(maleic anhydride-alt-1-octadecene) (PMAO) modified with polyethylene glycol (PEG) was coated on the QDs, which led to a slight reduction in fluorescence. Cellular labeling on HeLa cells was performed to demonstrate the utility of these probes for fluorescence imaging. We further studied the in vitro PA imaging capabilities of the Cu–In–Zn–Se/ZnSe/PMAO-g-PEG nanoparticles, which showed a distinct PA signal beyond 1.0 mg ml−1. The current work demonstrated that a moderate amount of Zn doping is necessary for enhancing fluorescence and there is a limit beyond which the fluorescence will be diminished. We also demonstrated the proof of concept that Cu–In–Zn–Se/ZnSe QDs are able to serve as a potential PA imaging contrast agent.
研究领域:
材料科学
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生物医学工程
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光学成像
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
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IF 8.3
Zhiping Yan,Ruiding Fei,Rui Fang,Shuyan Du,Yaru Yin,Xiao Li,Li Zhang,Huijuan Lin,Wenchao Wang
It's a successful strategy to enhance photodynamic of electron-involved photocatalytic hydrogen evolution reaction by the functionalized cocatalyst. Noble metals are widely used for photocatalytic H 2 production due to the suitable work function. However, the high cost and scarcity significantly restrict the overall benefit. Therefore, we engineered a cost-effective photocatalyst through FeNi alloy cocatalyst modification, wherein the unique gourd-shaped architecture enables significantly enhanced electron transport dynamics. Importantly, the intimate contact between the FeNi alloy and ZnSe semiconductor facilitates the formation of a Schottky junction at their interface. This Schottky junction acts as an efficient electron sink, promoting the directional transfer of photogenerated electrons from ZnSe to the FeNi cocatalyst while simultaneously suppressing detrimental charge recombination. As a result, the hybrid FeNi/ZnSe photocatalyst achieves an impressive hydrogen production rate of 3252.17 μmol g −1 h −1 under visible-light irradiation, which is higher than that of pristine ZnSe (1017.14 μmol g −1 h −1 ) by over 300 %, and exceeds Pt/ZnSe (2183.29 μmol g −1 h −1 ) by over 100 %. In addition, DFT calculations show a superior Gibbs Free Energy for photocatalytic H 2 production on the FeNi surface. This study not only provides valuable insights into the rational design and functional optimization of high-performance cocatalysts but also highlights the crucial role of Schottky junction-mediated interface engineering in boosting visible-light-driven photocatalytic H 2 evolution (PHE).
研究领域:
材料科学
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纳米技术
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催化
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能量转换
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物理化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zizhao Fu,Jie Zhao,Rui Jiang,Shiliang Mei,Wanlu Zhang,Ruiqian Guo
I-III-VI alloyed quantum dots (QDs) have shown great application potential in many fields. At present, Al-based alloyed QDs have become a kind of ideal material of the color conversion layer of WLEDs because of their blue-emission, abundant raw material content, and the strong stability of Aluminum oxides. In this study, we synthesized blue-emitting CuAlSe 2 /ZnSe QDs and dual-emitting CuAlGaSe/ZnSe QDs by using hot-injection and one-pot method respectively, with a photoluminescence quantum yield (PL QY) of 46.75% and 68.79%. Their spectral tuning effect and the luminescence mechanism were investigated and discussed by changing the elemental molar ratios and nucleation temperature. By changing the Cu/(Al+Ga) and Al/Ga molar ratio, the emission wavelength of CuAlGaSe/ZnSe QDs was adjustable from 456 nm to 631 nm, with the Al and Ga competition mechanism in CuAlGaSe/ZnSe was also proposed. Finally, a single-component dual-emission CuAlGaSe/ZnSe WLED with a color rendering index (Ra) of 91.4 was prepared. This work demonstrated the superior fluorescence performance of multi-component QDs and the potential application of Al-based QDs in WLEDs.
研究领域:
材料科学
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纳米技术
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光电子学
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固态照明
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光谱学
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量子点
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合金半导体纳米晶体
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产品关联
DOI
高影响因子
ACS Nano
·
2018
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IF 13.709
Xin Li,Junyou Yang,Qinghui Jiang,Hui Lai,Shuiping Li,Jiwu Xin,Weijing Chu,Jingdi Hou
For a typical perovskite solar cell (PKSC), the electron transport layer (ETL) has a great effect on device performance and stability. Herein, we manifest that low-temperature solution-processed ZnSe can be used as a potential ETL for PKSCs. Our optimized device with ZnSe ETL has achieved a high power conversion efficiency (PCE) of 17.78% with negligible hysteresis, compared with the TiO2 based cell (13.76%). This enhanced photovoltaic performance is attributed to the suitable band alignment, high electron mobility, and reduced charge accumulation at the interface of ETL/perovskite. Encouraging results were obtained when the thin layer of ZnSe cooperated with TiO2. It shows that the device based on the TiO2/ZnSe ETL with cascade conduction band level can effectively reduce the interfacial charge recombination and promote carrier transfer with the champion PCE of 18.57%. In addition, the ZnSe-based device exhibits a better photostability than the control device due to the greater ultraviolet (UV) light harvesting of the ZnSe layer, which can efficiently prevent the perovskite film from intense UV-light exposure to avoid associated degradation. Consequently, our results present that a promising ETL can be a potential candidate of the n-type ETL for commercialization of efficient and photostable PKSCs.
研究领域:
光伏技术
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材料科学
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纳米技术
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可再生能源
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半导体器件
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DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 8
·3327-3337
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IF 2.817
Xiao Dejun,Liu Suqin,Zhao Kuangmin,Ye Guanying,Su Yuke,Zhu Weiwei,He Zhen
Ultrasmall nitrogen-doped carbon-coated CoSe 2 /ZnSe nanospheres (CoSe 2 /ZnSe@C nanospheres) are fabricated by direct selenization of a delicately designed Co 1.6 Zn 0.4 -(benzimidazole) 4 metal–organic framework (MOF) nanosheet precursor and used as the anode materials in sodium-ion batteries (SIBs). The fabricated CoSe 2 /ZnSe@C nanospheres deliver a remarkable rate performance (395 mAh g −1 at 0.1 A g −1 and 341 mAh g −1 at 5.0 A g −1 ) and excellent long-term durability (346 mAh g −1 after 2500 cycle at 2.0 A g −1 ). The superior Na storage performance of the fabricated CoSe 2 /ZnSe@C nanospheres could be mainly attributed to their ultrasmall particle sizes and the phase boundaries between CoSe 2 and ZnSe, which improve the kinetics of the electrode, relieve the volume change during the charge/discharge process, and provide extra Na + storage sites. This work opens up possibilities to fabricate metal selenide–based hybrid materials with desired nanostructures and compositions from rationally designed multimetal MOF precursors for high-performance anode materials in SIBs.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 50
·505406
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IF 3.874
Chenyuan Zhao,Yuxiang Zhou,Tianyu Shi,Desong Guo,Haihong Yin,Changqing Song,Lin Qin,Zhiliang Wang,Haibao Shao,Ke Yu
The low sulfur utilization, cycling instability, and sluggish kinetics are the critical obstructions to practical applications of lithium–sulfur batteries (LSBs). Constructing sulfur hosts with high conductivity, suppressed shuttle effect, and rapid kinetics is essential for their practical application in LSBs. Here, we synthetically utilized the merits of ZnSe quantum dots (QDs) and layered Ni(OH)2 to boost the performance of LSBs. A novel core–shell ZnSe-CNTs/S@Ni(OH)2 was constructed using the ZnSe-CNTs network as framework to load sulfur and following with Ni(OH)2 encapsulation. The CNT network decorated with ZnSe QDs not only serves as a conductive framework providing fast electron/ion transfer channels, but also limits polysulfide diffusion physically and chemically. Layered Ni(OH)2, the wrinkled encapsulation, not only permits fast electron/ion transfer, but also buffers the expansion, confines active materials, and limits the polysulfide dissolution chemically. When used as a cathode, ZnSe-CNTs/S@Ni(OH)2 presents enhanced electrochemistry performance compared with ZnSe-CNTs/S and CNTs/S. The average specific capacity decreases from 1021.9 mAh g−1 at 0.2 C to 665.0 mAh g−1 at 2 C, showing rate capacity much higher than ZnSe-CNTs/S and CNTs/S. After 150 cycles, the capacity at 0.5 C slowly reduces from 926.7 to 789.0 mAh g−1, showing high retention of 85.1%. Therefore, our investigation provides a new strategy to construct a promising sulfur cathode for LSBs.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
CHINESE CHEMICAL LETTERS
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2018
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IF 2.631
Rongqiao Chen,Chune Guo,Wubo Chu,Nan Jiang,He Li
Marine microorganism accumulated on the surface of ships or pipelines would accelerate fouling organisms, such as mussels and barnacles, adhered on the surface. It was significant to understand the bio-interaction between the microorganisms and the surface. Attenuated total reflection (ATR) Fourier transform infrared (FTIR) spectroscopy was used to study the initial stages of marine microorganism adhering to surfaces, because it could probe the microorganism interaction to the surface regardless of the water interference. Bacillus sp. and Escherichia coli were selected to study the initial attachment on different surfaces, because they were typical fouling microorganisms and showed opposite Gram stain results. The assays were conducted respectively in dried and settled bacteria on two different surfaces (ZnSe, Al 2 O 3 coated on ZnSe). IR spectra of settled bacteria showed amide I band red shift and amide II band blue shift in aqueous environment on both surfaces compared with the dry bacteria. The reasons of amide bands shift were investigated and it was discovered that the hydrogen bond between the water and the protein of the bacteria led to the protein secondary structure change. ATR-FTIR provided an approach to study the attachment process and showed dynamic changing process on the surface, and it could be an appropriate approach to study the interaction between proteins and chemicals.
研究领域:
微生物学
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生物化学
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材料科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2014
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IF 3.84
Yongling Ding,Shirley Z. Shen,Huadong Sun,Kangning Sun,Futian Liu
l -Glutathione capped (GSH) ZnSe quantum dots (QDs) have been synthesized as a fluorescence ions probes for ultrasensitive Cu (II) detection. These QDs surface decoration with glutathione shells can be directly applied without previous treatment. The fluorescence quenching of the GSH-capped-ZnSe QDs depends on the concentration, pH values and reaction time of the Cu 2+ solution. Based on the effective electron transfer from GSH to Cu 2+ and the surface ligand stripping occurs onto the surface of ZnSe QDs, it results in the reduction of Cu 2+ to Cu + and increment of surface defection on the surface of the QDs. Under the optimum conditions, the detection limit of Cu 2+ is 2 × 10 −10 mol L −1 . Meanwhile, the effect of foreign ions displays a low interference response in the detecting of Cu 2+ ions. Moreover, based on the invariable absorption peak position and curtate luminescence lifetime of ZnSe QDs, the quenching process has also been confirmed to be a dynamic quenching procedure. With regard to the practical feasibility test of the fluorescent probe , a relative lower standard deviation (RSD) (≤3%) and a high recovery rate demonstrate that the proposed simple method is sensitive, accurate and reliable.
研究领域:
分析化学
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纳米生物技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2015
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IF 4.097
Ling Wang,Ran Yang,Jianjun Li,Lingbo Qu,Peter de B. Harrington
In this work, a very sensitive electrochemical sensor for Sudan I was established based on nanohybrids of graphene-ZnSe quantum dots . Positively charged cetyltrimethyl-ammonium bromide (CTAB) functionalized graphene was used as a template-directed building block to self-assemble negatively charged ZnSe quantum dots (QDs). The hybrids of ZnSe-CTAB-graphene exhibited strong enrichment effect on Sudan I and gave superior electrocatalytic activity towards the oxidation of Sudan I. Applying differential pulse voltammetry (DPV), the peak current of Sudan I is proportional to its concentration in the range from 0.004 to 2.0 μM and 2.0 to 15.0 μM. This report is the first on applying graphene-ZnSe hybrids for electrochemical sensing.
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
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2025
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IF 10
Bingjie Huo,Wei Bao,Weijun Tian,Bingkun Liu,Zhiyang Lu,Mengyuan Zou,Xinran Yu,Xinbo Wang
Antibiotic contamination in mariculture wastewater urgently requires effective remediation. Seawater's natural conductivity facilitates photocatalytic fuel cell (PFC) deployment for meeting this challenge. In this study, the ZnSe/ZnO/Ti core-shell nanorod array photoanode was successfully prepared, which was assembled with carbon cloth (CC) cathode to build the PFC system for norfloxacin (NOR) degradation and simultaneous electricity generation in mariculture wastewater. Experimental results demonstrated that the introduction of the ZnSe shell effectively enhanced the light harvesting capability and formed interfacial electric field at the heterojunction interface, promoting charge transfer performance. The ohmic resistance was the limiting factor for PFC performance enhancement. The Ti plate effectively reduced ohmic resistance, enhanced ion migration rates, and maximized the efficiency of interfacial reactions. The heterojunction, nanorod array, and Ti current collector formed high-conductivity pathways for the rapid directional transport of both charge carriers and electrolyte ions, reducing the resistance of the PFC and significantly enhancing its performance. The PFC system exhibited superior degradation performance with 94.42 % removal of NOR in 120 min. The simultaneous electric energy output of ZnSe/ZnO/Ti-15 was 2.46 mW/cm 2 , which was 2.48 and 2.2 times higher than those of the ZnO/Ti and ZnSe/ZnO/FTO systems, respectively. Moreover, the abundant Cl − in mariculture wastewater acted as supporting electrolyte while also generating Cl•, ClO• radicals, thereby further facilitating degradation. This study provided new insights for the performance improvement of PFC and the resource utilization treatment of marine aquaculture wastewater.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Chao Xiao,Ming Yin,Xindan Li,Zhong Kuang,Bin Wang,Hongjiang He,Shengquan Yu,Zhuoying Jia,Xiaoqiang Li
In this study, Fe 2+ :ZnSe x S 1-x (0.6 ≤ x ≤ 1) solid solution laser ceramics with cubic crystal structures were prepared for the first time via hot pressing sintering, using FeSe, ZnSe, and ZnS powders. The resulting ceramics exhibit a unique combination of the optical and physical properties of Fe 2+ :ZnSe and Fe 2+ :ZnS. An increase in the ZnS content led to a blueshift in the maximum absorption spectra of Fe 2+ ions and an enhancement in Vickers hardness. These findings suggest that Fe 2+ :ZnSe x S 1-x solid solution ceramics could serve as promising gain media for mid-infrared solid-state lasers, offering a novel approach for the development of directly pumped mid-infrared laser systems.
研究领域:
材料科学
·
光学
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激光技术
·
陶瓷
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）