Scientific Reports
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2014
·Vol. 4
·期 1
·1-8
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IF 5.078
Cao Sheng,Li Chengming,Wang Lin,Shang Minghui,Wei Guodong,Zheng Jinju,Yang Weiyou
CuInS 2 (CIS) quantum dots (QDs) have tunable photoluminescence (PL) behaviors in the visible and near infrared spectral range with markedly lower toxicity than the cadmium-based counterparts, making them very promising applications in light emitting and solar harvesting. However, there still remain material- and fabrication- related obstacles in realizing the high-performance CIS-based QDs with well-resolved Mn 2+ d-d emission, long emission lifetimes as well as high efficiencies. Here, we demonstrate the growth of high-quality Mn 2+ -doped CuInS-ZnS (CIS-ZnS) QDs based on a multi-step hot-injection strategy. The resultant QDs exhibit a well-resolved Mn 2+ d-d emission with a high PL quantum yield (QY) up to 66% and an extremely long excited state lifetime up to ~3.78 ms, which is nearly two times longer than the longest one of “green” QDs ever reported. It is promising that the synthesized Mn 2+ -doped CIS-ZnS QDs might open new doors for their practical applications in bioimaging and opto/electronic devices.
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PubMed
高影响因子
Materials Research Express
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2014
·Vol. 1
·期 1
·015033
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IF 0
Yanyan Chen,Shenjie Li,Lijian Huang,Daocheng Pan
Au+ ions have been successfully incorporated into the lattice of ZnxCd1−xS quantum dots as luminescent centers via an aqueous method. The dopant emission can be tuned in the range of 445 to 570 nm, and the highest quantum yield can reach as high as 30%. Our results showed that Au+ ions can be used as an excellent luminescent dopant in doped quantum dots. Finally, these water-soluble quantum dots can be used directly in PL imaging of HepG2 cells without conjugating any biological targets, indicating a high potential application in bio-labeling.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Yujun Guo,Jiayi Qu,Zhenkai Zhang,Zhenyue Liu,Chen Yue,Qiuying Chen,Zhiguo Yang,Yang Mu,Xiaoning Wang,Davoud Dastan,Xi-Tao Yin,Xiaoguang Ma
In this paper, ZnS/NiO p-n heterojunction microspheres were fabricated via a two-step hydrothermal approach. The sensing properties of composites with different ZnS contents were investigated by regulating the ratio of Zn. When containing 25 mol% ZnS, the ZnS/NiO nanosphere sensor achieved a response of 125. The response was improved by a factor of about 83.3 compared to pure NiO. The sensor functions optimally at a temperature of 225 ℃, and it possesses excellent selectivity, a rapid response/recovery time (49/44 s), and long-term stability. Therefore, this paper provides a hydrothermal method to prepare ZnS/NiO nanocomposites with heterojunction, specifically designed to detect n-butanol. After performing a series of characterizations, it was determined that the enhancement of the gas-sensitive properties could be related to the construction of ZnS/NiO heterojunctions and the increase in oxygen vacancies.
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高影响因子
ChemSusChem
·
2024
·
IF 7.5
Tong Xu,Tao Shan,Yuting Jiang,Lian-hua Xu,Huiyan Zhang,Sheng Chu
Graphical Utilizing solar energy to upcycling plastic waste into value-added chemicals is a promising strategy for realizing sustainable development. In this study, an efficient photocatalytic conversion of polyethylene plastic into syngas (CO+H 2 mixtures) by using a ZnS/Ga 2 O 3 Z-scheme heterojunction photocatalyst is reported. The strategy provides a green approach to effectively mitigate plastic pollution under environmentally friendly conditions. The photocatalytic conversion of plastic waste into value-added products using solar energy presents a promising approach for promoting environmental sustainability. Nonetheless, the emission of CO 2 during the conventional photocatalytic degradation process remains a major hurdle that impedes its further development. In this study, we propose an efficient photocatalytic conversion of polyethylene plastic into syngas (CO+H 2 mixtures) by using a ZnS/Ga 2 O 3 Z-scheme heterojunction photocatalyst. It is found that the strong redox capability of photogenerated holes and electrons in the Z-scheme heterojunction photocatalyst can promote the oxidative depolymerization of PE plastic, concurrently enabling the efficient reduction of the intermediate product CO 2 into syngas. Furthermore, this system also demonstrates applicability in the conversion and upcycling of other polyolefin plastics including polypropylene and polyvinyl chloride. Our findings highlight the potential of polyolefin plastics photoreforming for the production of syngas under environmentally benign conditions.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Weixin Li,Qing Liu,Zhongxuan Yin,Yongqing Ma,Ganhong Zheng,Chuhong Zhu,Zhenxiang Dai,Meiling Wang
The photocatalytic conversion of CH 4 into value added liquid products in high yield has always been a huge challenge due to unavoidable peroxidation. Here, a kind of Cu/ZnS/ZnO x -550 Z type heterojunction is designed for photocatalytic CH 4 oxidation into C1 products (including CH 3 OH, CH 3 OOH and HCHO) by O 2 through the synergistic catalysis of multiple mechanisms. The CH 4 photooxidation reaction at 30 °C yields 56 mmol g −1 of C1 oxygenated products during 8 h, which exhibits a much higher value than those reported in recent studies. In situ Fourier transform infrared spectroscopy, electron spin resonance spectroscopy, X-ray photoelectron spectroscopy, electrochemical measurements and density functional calculation are used to comprehensively clarify the underlying photocatalytic mechanism. It indicates that in situ formed singlet oxygen ( 1 O 2 ) not only plays vital roles in triggering CH 4 photooxidation to C1 products, but also suppresses products peroxidation by inhibiting ·OH formation. The incorporated Cu transforms the ZnS/ZnO heterojunction from type II to Z -scheme, enhances light absorption, and, together with oxygen vacancies, regulates the electronic structure of the catalyst, thereby facilitating the adsorption and dissociation of 1 O 2 , and ultimately achieving high efficiency of CH 4 photooxidation.
研究领域:
光催化
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材料科学
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化学工程
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环境科学
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能量转换
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高影响因子
Journal of Nanomaterials
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2015
·
IF 1.644
Wenyan Liu,Yu Zhang,Cheng Ruan,Dan Wang,Tieqiang Zhang,Yi Feng,Wenzhu Gao,Jingzhi Yin,Yiding Wang,Alexis P. Riley,Michael Z. Hu,William W. Yu
The quantum dot-based light-emitting diodes (QD-LEDs) were fabricated using blue GaN chips and red-, yellow-, and green-emitting ZnCuInS/ZnSe/ZnS QDs. The power efficiencies were measured as 14.0 lm/W for red, 47.1 lm/W for yellow, and 62.4 lm/W for green LEDs at 2.6 V. The temperature effect of ZnCuInS/ZnSe/ZnS QDs on these LEDs was investigated using CIE chromaticity coordinates, spectral wavelength, full width at half maximum (FWHM), and power efficiency (PE). The thermal quenching induced by the increased surface temperature of the device was confirmed to be one of the important factors to decrease power efficiencies while the CIE chromaticity coordinates changed little due to the low emission temperature coefficients of 0.022, 0.050, and 0.068 nm/°C for red-, yellow-, and green-emitting ZnCuInS/ZnSe/ZnS QDs. These indicate that ZnCuInS/ZnSe/ZnS QDs are more suitable for downconversion LEDs compared to CdSe QDs.
研究领域:
材料科学
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光学工程
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2016
·Vol. 16
·期 8
·8302-8307
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IF 1.338
Wang Yong,Qu Jianhang,Li Shufang,Qu Jianying
In this study, a simple and sensitive electrochemical analytical method is developed for detection of catechol based on laccase and ZnS:Ni/ZnS quantum dots with core/shell structure modified glassy carbon electrode using cyclic voltammetry. The proposed biosensor showed an excellent
catalytic activity toward the reduction of catechol, which exhibited a linear response to the concentrations ranging from 0.1 to 100 μmol · L−1 with a low detection limit of 35 nmol · L−1 for catechol (S/N = 3). The reproducibility,
interference and stability of the measurements were also favorable with a high retention rate of 95.31% of the peak current after 30 days. Moreover, this novel method has been successfully applied to determination of catechol in real water with satisfactory recoveries. The resulting biosensor
will provide important improvements for electrochemical biosensors in application for environment.
研究领域:
环境科学
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电化学
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生物传感器
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分析化学
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高影响因子
Journal of Materials Chemistry C
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2013
·Vol. 1
·期 14
·2540-2547
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IF 0
Sheng Cao,Jinju Zheng,Jialong Zhao,Lin Wang,Fengmei Gao,Guodong Wei,Ruosheng Zeng,Linhai Tian,Weiyou Yang
We demonstrate a strategy for the growth of Mn2+ ion doped cadmium based II–VI semiconductor quantum dots (QDs) with a designed buffer layer of ZnS (MnS/ZnS/CdS or Mn:CdS QDs), which aims to meet the challenge of obtaining highly efficient and well-resolved Mn2+ ion emission. First, small, high quality MnS cores are obtained by using thiols to replace conventional alkyl amines as capping ligands. Then a buffer layer of ZnS with a tailored thickness is introduced to the QDs before the growth of CdS shells to reduce the size mismatch between the Mn2+ (dopant) and Cd2+ (host) ions. The fabricated MnS/ZnS/CdS core/shell QDs exhibit a high PL QY of up to 68%, which is the highest ever reported for any type of Mn2+ ion doped cadmium based II–VI semiconductor QD. The photoluminescence (PL) of the QDs consists of well-resolved Mn2+ ion emission without any detectable emission from the CdS band edge or surface defects. In addition, our MnS/ZnS/CdS QDs cannot only be made water-soluble, but can also be coated by ligands with short carbon chain lengths, nearly without cost to the PL QY, which could make them strong candidates for practical applications in biology/biomedicine and opto/electronic devices.
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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半导体物理
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光物理
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生物成像
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生物医学应用
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Wenxin Yang,Changsheng Zhao,Shipeng Li,Daqin Chen,Cailong Zheng,Ruidan Zhang,Lu Zhang,Tianmin Wu
A cost-effective CuGaS 2 /ZnS QD synthesis achieves ultrabroadband white emission with a FWHM of 257.9 nm and PLQY of 34.5%. • Cu/Ga ratio and coating temperature regulate defect trapping and carrier relaxation for tunable ultrabroadband emission. • QD-based pc-WLEDs deliver high-quality white light with CIE (0.348, 0.359), CRI of 94.9, CCT of 4915 K, and EQE of 23.8%. Colloidal I-III-VI QDs have emerged as promising candidates for environmentally benign next-generation illumination owing to their facile synthesis, low toxicity, and exceptional optoelectronic properties, yet achieving high-quality white-light emission remains challenging. Herein, we report a cost-effective and sustainable synthesis of CuGaS 2 /ZnS QDs exhibiting ultrabroadband white-light emission with a full width at half maximum (FWHM) of 257.9 nm and a robust photoluminescence quantum yield (PLQY) of 34.5%. Mechanistic investigations reveal that Cu/Ga compositional engineering regulates Cu vacancies, suppressing intrinsic nonradiative recombination while stabilizing shallow-defect-related high-energy emission. Concurrently, temperature-dependent shell growth may regulate interfacial cation redistribution and defect configurations, thereby modulating cation-disorder-associated localized STE-like states, contributing to long-lived low-energy emissions. Through the synergistic suppression of nonradiative recombination and modulation of carrier relaxation and trapping dynamics, the coating temperature redistributes carrier populations between intrinsic and defect-related states, enabling stable dual emission and highly tunable ultrabroadband emission across the entire visible spectrum. Furthermore, phosphor-converted white light-emitting diodes (pc-WLEDs) fabricated by integrating CuGaS 2 /ZnS QDs with red-emitting CuInS 2 /ZnS QDs deliver high-fidelity white-light emission with a color rendering index (CRI) of 94.9 and an external quantum efficiency of 23.8%, closely reproducing the spectral characteristics of natural sunlight and highlighting their promise for solid-state lighting and display technologies. Download: Download high-res image (123KB) Download: Download full-size image
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Fengping Peng,Xuan Kai,Wei Wang,Chunzheng Wu
Converting N 2 into ammonia under ambient conditions using mechanical energy-driven piezocatalysis represents a promising approach for sustainable nitrogen fixation, although its efficiency is often limited by insufficient nitrogen activation and rapid recombination of piezo-induced charge carriers. Herein, bi-piezoelectric ZnO-ZnS heterostructures were successfully constructed through a post-synthetic anion exchange strategy using electrospun ZnO as the precursor. The gradual O 2– to S 2- exchange process generated a core–shell structure composed of a ZnO core and a porous ZnS shell while preserving favorable interfacial coupling between the two piezoelectric phases. The optimized heterostructure achieved significantly enhanced ammonia production, delivering yields 2.1 and 8.9 times higher than those of ZnO and ZnS, respectively, and 2.5 times higher than a physical mixture of ZnO and ZnS with similar composition. This enhancement was also observed in dye degradation, demonstrating the general applicability of the heterostructure design. Mechanistic studies revealed that the improved performance originates from enhanced piezoelectric polarization, more efficient spatial charge separation, and abundant surface active sites that promote N 2 adsorption and activation. This work provides an effective strategy for constructing strongly coupled bi-piezoelectric heterostructures and highlights the importance of interface engineering for efficient piezocatalytic nitrogen fixation.
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高影响因子
JOM
·
2025
·
IF 2.3
Li Rui,Zhang Mengmeng,Li Jing,Zhang Chaobo,Fu Guang
Acid wastewater (AWW) from the non-ferrous metal smelting industry is characterized by a high level of acidity and a high concentration of As. Sulfiding agents are commonly used for arsenic removal from acid wastewater because of their high efficiency. To address the issues associated with traditional sulfiding agents, such as the release of harmful hydrogen sulfide gas and the introduction of large amounts of sodium ions, this paper proposes a new process of ultrasound-enhanced ZnS for arsenic removal from acid wastewater by sustained release in situ. The low solubility of ZnS provides the advantages of matching the reaction rate to arsenic removal efficiency, inhibiting the escape of H 2 S gas, and preventing the introduction of other cations. Ultrasound can open the ZnS surface encapsulation and accelerate the reaction rate. Experimental research has shown that the arsenic removal rate reached 99.96% and the arsenic concentration was only 0.42 mg/L at an acidity of 120 g/L, S/As molar ratio of 3:1, reaction temperature of 60°C, and ultrasonic power of 100 W for 120 min. The development of this process is of great significance as an application prospect for the arsenic removal from acid wastewater in zinc smelting.
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高影响因子
Materials Chemistry Frontiers
·
2016
·Vol. 1
·期 2
·294-303
·
IF 0
Mingli Ni,Guannan Chen,Hongwei Sun,Haiyan Peng,Zhifang Yang,Yonggui Liao,Yunsheng Ye,Yingkui Yang,Xiaolin Xie
High diffraction efficiency and low driving voltage are typically considered to be prerequisites for the practical applications of holographic polymer dispersed liquid crystals (HPDLCs), which are especially critical for their use in the state-of-the-art low-threshold mirrorless tunable lasers. Nevertheless, high driving voltages are usually resulted for HPDLCs upon increasing the holographic diffraction efficiency via optimizing the monomer/LC formulations. Herein, we present that doping nanoparticles into HPDLCs with controlled distribution is a facile and efficient approach to circumvent the aformentioned issues. Zinc sulfide (ZnS) nanoparticle doped HPDLCs with high diffraction efficiency (94.0 ± 2.1%), and a low threshold driving voltage of 2.5 V µm−1 that is decreased from 11.6 V µm−1 for the pristine form, are achieved by doping 8 wt% ZnS nanoparticles into the HPDLCs based on an acrylamide monomer, N,N-dimethylacrylamide, that contributes significantly to the high diffraction efficiency up to 98.2 ± 1.4%.
研究领域:
材料科学
·
光学工程
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