Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Min Zou,Chao Tan,Yan Zhang,Junjie Hu,Zhou Ma,Zhengqiu Yuan,Lei Zhang,Ming Wu,Hu Zhou
To solve the recovery problem of nanosized powder form of photocatalysts, our work was devoted to develop a macroscale membrane-shaped photocatalyst with outstanding efficiency as well as high stability. Specifically, zinc oxide (ZnO) and cadmium sulfide (CdS) nanoparticles were successfully loaded onto the polyurethane (PU) matrix through blending and in-situ growth way, respectively. The introduction of ZnO can effectively improve the membrane hydrophilicity and endow it with some photo-catalysis capability without disturbing membrane structural integrity. After the construction of CdS/ZnO heterojunction , the photocatalytic activity obtained further enhanced. Compared with ZnO/PU (ZP) and CdS/PU (CP), CdS/ZnO/PU composite membrane (CZP) displayed the highest photocatalytic performance. The efficiency of CZP in the degradation of potassium ethyl xanthate (PEX) reached up to 97.06%, which is 7.21 and 5.42 times higher than the ZP and CP, respectively. Furthermore, CZP also exhibited satisfactory performance for removing multifarious refractory organic pollutants including potassium butyl xanthate, potassium amyl xanthate, Rhodamine B, methylene blue , crystal violet, tetracycline , and levofloxacin. Finally, the possible photocatalytic reaction mechanism of representative PEX contaminant over CZP membrane surface was discussed in detail. Overall, this novel composite porous membrane exhibited outstanding application potential in wastewater remediation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Weijia Han,Long Ren,Xiang Qi,Yundan Liu,Xiaolin Wei,Zongyu Huang,Jianxin Zhong
A novel ternary CdS/ZnO/graphene composite has been successfully prepared by loading ZnO and CdS nanoparticles in graphene nanosheets via a facile one-step hydrothermal method. The microstructures and properties have been examined by X-ray diffraction (XRD), scanning electron microscopy with an energy dispersive spectroscope (EDS), transmission electron microscopy, Raman and UV–vis diffuse reflectance spectra (DRS). The characterization results reveal that the crystalline of the composite is very well, the graphene sheets were tightly coated with ZnO and CdS nanoparticles, and the light-harvesting was effectively strengthened. Taking photoelectrochemical test, the ternary CdS/ZnO/graphene composite exhibits enhanced photocatalytic activity compared with its foundation matrix binary composites and pure ZnO and CdS. The improved photocatalytic performance can be attributed to the enhanced light absorption, the extremely efficient charge separation, as well as superior durability of the ternary composite. It is proposed that graphene-based composites by coupling graphene to suitable, multiple semiconductors can not only greatly improve the capacity for photocatalytic, but also expand the exploration and utilization of graphene-based nanocomposites for energy conversion.
研究领域:
材料科学
·
能源转换技术
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2021
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IF 6.064
Mengqi Wang,Kaiyue Zhang,Feixiang Ji,Yurong Guo,Chao Wang,Shiping Wang,Ya Chu,Guangjiu Zhao
A water-soluble probe composite material (CDs/ZnO) was synthesized by microwave pyrolysis methods of citric acid , urea and zinc oxide (ZnO) with aggregation-induced emission activity. We creatively realized the composite of CDs and nano-ZnO in the form of foam, then used as bactericide for the first time and showed excellent antibacterial properties. Also, the composite materials overcame the problem of aggregation-induced quenching (ACQ) and realized solid-state emission. The materials had two different emission centers, and the two emission peaks were varied with the change of excitation wavelength. Furthermore, Methyl red (MR) showed fluorescence quenching for CDs/ZnO with obvious linear correlation, which demonstrated potential in the measurement of MR in dyeing wastewater. The CDs/ZnO we obtained perfectly inherited the advantages of CDs and nano ZnO , it has not just no cytotoxicity to cells, but also has a good killing effect on bacteria. Hence, this work shows significant adaptable fluorescence-based protocol with enormous potential applications in biology.
研究领域:
材料科学与工程
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生物学
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环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xiangbo Feng,Lvwei Sun,Wei Wang,Yuzhen Zhao,Jian-Wen Shi
Photoelectrochemical (PEC) water splitting provides a promising strategy for the production of clean hydrogen fuel. Herein, a new CdS@ZnO core–shell nanorod arrays (NRAs) is successfully constructed by atomic layer deposition (ALD) for H 2 evolution from PEC water splitting. The CdS@ZnO 200 obtained after 200 ALD cycles presents a significantly enhanced PEC H 2 evolution rate of 21.64 μmol·h −1 ·cm −2 , which is about 9.4 times of pristine CdS NRAs (2.31 μmol·h −1 ·cm −2 ). The reasons for the improved PEC H 2 evolution performance can be ascribed to several aspects: firstly, the Z-scheme charge transfer mechanism formed between CdS core and ZnO shell promotes the effective spatial separation of photo-induced electrons and holes; secondly, the close contact between the two semiconductors resulted from ALD process helps to reduce the transfer resistance of charge carriers. In addition, the CdS core is tightly wrapped by ZnO shell, which helps to prevent the photo-corrosion of CdS core. This work provides a new type of photoanode material suitable for PEC H 2 evolution from water splitting, and provides an efficient anti-corrosion method for the use of photocorrosive semiconductor materials.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Jingjing Liu,Bicheng Zhu,Liuyang Zhang,Jiajie Fan,Jiaguo Yu
It is imperative to seek for novel materials with pronounced gas sensing performance towards triethylamine for the sake of human health. Herein, we successfully fabricate an outstanding triethylamine sensor based on CdS/ZnO composite with 0D/2D structure, which are prepared by in-situ growth of CdS quantum dots on ultra-thin ZnO nanosheets . The ratios between the two ingredients are adjusted and their effect is evaluated. The optimal sample exhibits the lowest operating temperature of 200 °C, the highest response value of ~20 and the fastest response time of 2 s. Besides, it also has the virtues of durable stability, excellent selectivity and superior anti-interference ability. The mechanism behind the aforementioned intriguing performance is investigated by X-ray photoelectron spectroscopy, Kelvin probe and density function theory (DFT) simulation. All the results verify that the enhanced gas sensing properties are derived from splendid 0D/2D structure, n - n heterojunction and large specific surface area. Additionally, this study opens an avenue for designing sensors with 0D/2D structure.
研究领域:
材料科学
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纳米技术
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气体传感
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化学传感器
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Wei Wang,Qinyang Sheng,Guowei Zhi,Yuan Zhao,Ruiyang Qu,Luanhong Sun,Shengli Zhang
Photocatalytic technology based on heterojunction structure has been proved to be an effective way to solve environmental pollution and energy crisis. The effective carrier concentration plays an important role in improving the performance of heterojunction photocatalyst. In this work, CuSbS 2 (CAS)-CdS-ZnO was prepared by simple 3-steps microwave irradiation method to reveal the influence of energy band structure on photocatalytic performance. Adding CdS could regulate band alignment to translate the “cliff-like” conduction band offset of CAS-ZnO to “spike-like”. That could effectively reduce the carrier recombination rate to improve the photocatalytic degradation activity, which could completely degraded Rhodamine B (RhB) after 80 min under a solar simulation, highest rate constant (0.02028 min −1 ) and good stability. Furthermore, the transformation of charge transfer mechanism from the Z-type to Ⅱ-type by adding CdS were confirmed by experiments and density functional theory (DFT) calculations. This change could raise the energy level of photoelectrons, resulting in CAS-CdS-ZnO with a certain photocatalytic hydrogen evolution capacity (42.37 μmol g −1 h −1 ). This work reveals the important role of band structure in photocatalytic properties and applications of heterojunction.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2026
·
IF 4.3
Yue Song,Wenhui Liu,Xiaoyue Zhao,Xingxi Du,Sitong Zhang,Shuangqi Hu
2,4,6-Trinitrotoluene (TNT), as a widely used energetic material, is prone to causing water pollution during its production, transportation and disposal processes. This poses a severe menace to the environment and human health. Therefore, the efficient treatment of TNT-polluted wastewater has grown into a popular research direction in the environmental field. Photocatalytic technology has great application prospects due to its environmental friendliness and thorough degradation. As a commonly used photocatalyst, nano-ZnO suffers from the drawbacks of a wide band gap that only responds to ultraviolet light and limited photocatalytic performance, and constructing heterojunctions is an effective strategy to enhance its performance. In this study, CdS/ZnO heterojunction composites were synthesized via the coprecipitation method. After optimizing the component ratio, the 4-CdS/ZnO exhibited a photocatalytic degradation efficiency of over 92% for TNT, with a degradation efficiency 20 times higher than that of pure ZnO. Moreover, cyclic experiments verified its excellent stability. The present study puts forward novel ideas and technical support for the green and efficient degradation of TNT-contaminated water bodies.
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产品关联
DOI
高影响因子
International Journal of Nanomedicine
·
2024
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IF 6.6
Mengqi Wang,Shuting Lan,Mingjun Song,Rongrong Zhang,Wenqi Zhang,Xiaomei Sun,Gang Liu
Introduction The anti-cancer properties of zinc oxide-doped carbon dots (CDs/ZnO) in inhibiting triple-negative breast cancer (TNBC) progression merit more investigation.Methods With citric acid as the carbon source, urea applied as the nitrogen source, and zinc oxide (ZnO) used as a reactive dopant, CDs/ZnO were synthesized by microwave heating in the current study, followed by the characterization and biocompatibility assessments. Subsequently, the anti-cancer capabilities of CDs/ZnO against TNBC progression were evaluated by various biochemical and molecular techniques, including viability, proliferation, migration, invasion, adhesion, clonogenicity, cell cycle distribution, apoptosis, redox homeostasis, metabolome, and transcriptome assays of MDA-MB-231 cells. Additionally, the in vivo anti-cancer potentials of CDs/ZnO against TNBC progression were analyzed using TNBC xenograft mouse models.Results The biocompatibility of CDs/ZnO was supported by the non-significant changes in the pathological and physiological parameters in the CDs/ZnO treated mice, alongside a non-cytotoxic effect of CDs/ZnO on the proliferation of normal cells. Notably, the CDs/ZnO treatments effectively decreased the viability, proliferation, migration, invasion, adhesion, and clonogenicity of MDA-MB-231 cells. Furthermore, the CDs/ZnO treatments induced cell cycle arrest, apoptosis, redox imbalance, metabolome disturbances, and transcriptomic alterations of MDA-MB-231 cells by regulating the MAPK signaling pathway. Additionally, the CDs/ZnO treatments markedly suppressed the in vivo tumor growth in the TNBC xenograft mouse models.Conclusion In this study, we synthesized CDs/ZnO via microwave heating, using citric acid as the carbon source, urea as the nitrogen source, and ZnO as a reactive dopant. We confirmed the biosafety and potent anti-cancer efficacy of CDs/ZnO in inhibiting TNBC progression by disrupting malignant cell behaviors through modulation of the MAPK signaling pathway.
研究领域:
癌症研究
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材料科学
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分子生物学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
ANALYST
·
2021
·Vol. 146
·期 14
·4595-4604
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IF 4.616
Jiarui Yu,Jingyu Lin,Jianping Li
A new photoelectrochemical enzyme biosensor based on an extended-gate field-effect transistor (EGFET) was constructed for the highly sensitive detection of glyphosate based on the inhibition of acetylcholinesterase (AChE) activity by glyphosate. First, a two-step hydrothermal method was used to introduce ZnO and CdS onto an activated indium tin oxide (ITO) electrode to prepare a CdS/ZnO/ITO electrode. Then, AChE was immobilized on CdS/ZnO/ITO with chitosan to obtain an AChE/CdS/ZnO EGFET sensor. Under optimal experimental conditions, the logarithmic value of glyphosate in the range of 1.0 × 10−15–1.0 × 10−11 mol L−1 exhibited a good linear relationship with the photo-drain current response. The detection limit was 3.8 × 10−16 mol L−1 (signal-to-noise ratio = 3). The results show that the AChE/CdS/ZnO EGFET sensor has extremely high sensitivity and good selectivity. Moreover, the sensor was used for the determination of glyphosate in vegetables, demonstrating its application for the real-time detection of samples.
研究领域:
分析化学
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生物传感器
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环境科学
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电化学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
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IF 8.456
Jie Wei,Huaming Chen,Haihang Chen,Yunyan Cui,Aori Qileng,Weiwei Qin,Weipeng Liu,Yingju Liu
In this study, a versatile dual-modal readout immunoassay platform was achieved for sensitive and broad-spectrum detection of ochratoxins based on the photocurrent response of flexible CdS/ZnO nanorod arrays/reduced graphene oxide and the localized surface plasmon resonance (LSPR) peak shift of Au nanobipyramids (Au NBPs). By using nanoliposomes as the vehicle to carry the secondary antibody and encapsulate horseradish peroxidase (HRP), the photocurrent change and the peak shift can be greatly amplified. The reaction mechanism was investigated in detail, indicating that HRP can trigger enzymatic bioetching in the presence of H2O2. In the photoelectrochemical detection, the oxidized HRP can etch CdS on the photoelectrode, resulting in the photocurrent change, while in the colorimetric detection, HRP can oxidize H2O2 to produce hydroxyl radicals that can etch Au NBPs to form multiple color changes and LSPR shifts. Compared with the common single-modal immunoassay for ochratoxins, such dual-modal immunoassay is more precise and reliable, owing to the completely independent signal conversion and transmission mechanism. Therefore, we hope that this accurate, simple, and visualized strategy may create a new avenue and provide innovative inspiration for food analysis.
研究领域:
分析化学
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食品科学
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纳米技术
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生物化学
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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）