JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Baoqing Han,Congsi Wang,Wanying Yang,Guoqiang Hu,Xinyu Zhang,Benben Wang,Hairong Wang
As a typical physiological marker, isoprene has been widely studied for its related applications in breath detection. Pure ZnO samples were prepared using the classical hydrothermal method with varying synthesis parameters. By comparing these parameters, the optimal synthesis conditions and nanostructures were determined. The prepared spherical ZnO nano-flower material (ZnO-S5 sample) exhibited a loose and porous structure. Additionally, the gas sensing sensors were prepared with ZnO-S4 and ZnO-S5 samples respectively, and their gas-sensing characteristics were analyzed comprehensively. The data indicated that spherical nano-flower ZnO sensor (ZnO-S5) exhibited an optimal operating temperature of 260 °C, and the response time is only 5 s when the isoprene concentration is 0.2 ppm. It also demonstrated good repeatability and sustained stability. Notably, even at isoprene concentrations as low as 20 ppb, the ZnO-S5 sample still had obvious response, and the response value was approximately 3.3 times that of ZnO-S4. Simultaneously, when compared with other typical biomarkers such as hydrogen, carbon monoxide, ammonia, ethanol and acetone, ZnO-S5 sample has relatively better selectivity for isoprene. Therefore, the spherical nano-flower-like ZnO sensor holds promise as a low-cost, high-performance isoprene gas detector for the rapid identification of trace isoprene.
研究领域:
材料科学
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生物医学工程
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气体传感技术
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yan Guo,Qidi Wu,Hongyun Liu,Yumei Xian,Xun Zhou,Ying Wu,Peiqing Zhang,Zhenyu Li
Membrane distillation (MD) holds significant promise for effluent purification to mitigate the global water shortage. However, the existing petroleum-based MD membranes suffer from high costs, limited sustainability, and wetting issues. Herein, we employed biosynthetic bacterial cellulose (BC) as the substrate and successfully achieved a uniform and stable dispersion of ZnO nanoflowers onto the BC nanofibers through in-situ synthesis technology. After undergoing a fluorination process, a superhydrophobic membrane was prepared by the synergistic effect of micro/nano structures and low surface energy. The resulting membrane exhibited exceptional properties, including a remarkable contact angle of 151.7°, a substantial liquid entry pressure of 2.5 bar, and exhibiting structural integrity and high hydrophobicity even under harsh conditions. Furthermore, this strategy ensured exceptional membrane porosity (∼94.9 %), increased the permeation flux and reduced conductive heat transfer, thereby enhancing the thermal efficiency of the membrane. Furthermore, the membrane demonstrated effective bactericidal activity and self-cleaning capability, facilitating easy cleaning and extending service life. These properties endow the membrane with an impressive durability. After 96 h of continuous operation, the membrane maintained a stable permeation flux of 10.29 L m −2 h −1 and an extraordinary salt rejection rate exceeding 99.9 %. Notably, even with the addition of sodium dodecyl sulfate to the feed, the membrane exhibited stable permeation flux and outstanding antiwetting properties. In summary, the MD membrane fabricated using the bio-inspired chemistry demonstrated a promising potential for long-term applications in direct contact MD operations.
研究领域:
材料科学
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环境工程
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 7
·1657
·
IF 4.2
Huiting Peng,Yiping Liu,Yinfeng Shen,Ling Xu,Jicun Lu,Ming Li,Hong-Liang Lu,Liming Gao
Efficient sensors for toluene detecting are urgently needed to meet people’s growing demands for both environment and personal health. Metal oxide semiconductor (MOS)-based sensors have become brilliant candidates for the detection of toluene because of their superior performance over gas sensing. However, gas sensors based on pure MOS have certain limitations in selectivity, operating temperature, and long-term stability, which hinders their further practical applications. Noble metals (including Ag, Au, Pt, Pd, etc.) have the ability to enhance the performance of MOS-based sensors via surface functionalization. Herein, ZnO nanoflowers (ZNFs) modified with bimetallic AuPt are prepared for toluene detection through hydrothermal method. The response of a AuPt@ZNF-based gas sensor can reach 69.7 at 175 °C, which is 30 times, 9 times, and 10 times higher than that of the original ZNFs, Au@ZNFs, and Pt@ZNFs, respectively. Furthermore, the sensor also has a lower optimal operating temperature (175 °C), good stability (94% of previous response after one month), and high selectivity towards toluene, which is the result of the combined influence of the electronic and chemical sensitization of noble metals, as well as the unique synergistic effect of the AuPt alloy. In summary, AuPt@ZNF-based sensors can be further applied in toluene detection in practical applications.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 31
·期 11
·115502
·
IF 3.399
Shendan Zhang,Chenhao Wang,Fengdong Qu,Siqi Liu,Cheng-Te Lin,Shiyu Du,Yousi Chen,Fanli Meng,Minghui Yang
Surface modification is a simple and effective means to promote the sensing performance of metal oxide semiconductor-based gas sensors. Marigold-shaped ZnO nanoflowers are fabricated via a simple precipitation reaction and subsequently catalytically modified with RuO2 on the surface through an ethylene glycol solvothermal treatment. The experimental results have proven that a very low content of Ru on the surface of ZnO exists in an oxidized state. However, the gas response of the sensor based on RuO2-modified ZnO is remarkably improved by 17 times to 100 ppm acetone with the decrease of optimal operating temperature from 219 °C–172 °C and reduction in recovery time from 79–52 s. The sensing enhancement mechanism of surface modification can be attributed to the formation of massive small heterostructure between p-type RuO2 ultrasmall nanoparticles and n-type ZnO as well as the catalytic effect of Ru4+ and a rougher surface.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2019
·
IF 4.888
Yanning Qu,Renliang Huang,Wei Qi,Mingbo Shi,Rongxin Su,Zhimin He
Zinc oxide (ZnO) nanomaterials are functional photocatalysts that show excellent photocatalytic activity, among which diverse morphologies, such as nanospheres, nanorods, nanoleaves, nanodisks, or nanoflowers, often possess different photocatalytic activities. In this study, we employed a simple ultrasonic treatment to controllably synthesize three types of three-dimensional (3D) fluffy ZnO nanoflowers with different nanostructures. Specifically, one nanoflower with smooth edges was formed via direct hydrothermal reaction without ultrasonic treatment (denoted as ZnO-0), and the other two with different jagged margins were obtained by ultrasonic treatment at 250 W and 950 W, respectively, before the hydrothermal procedure (denoted as ZnO-250 and ZnO-950). The results showed that the size, specific surface area, crystallite dimension, intrinsic donor defects and the signals of reactive radicals of ZnO nanoflowers all decreased with increasing ultrasonic intensity. Furthermore, the photocatalytic performance of such ZnO nanoflowers with similar morphologies but different nanostructures was investigated using methyl orange (MO) as a model pollutant. As expected, ZnO-0 possessed the highest photocatalytic activity with a kinetic constant of 0.0478 min −1 , while the value decreased to 0.0251 min −1 and 0.013 min −1 for ZnO-250 and ZnO-950 under simulated sunlight irradiation, respectively, suggesting that the photocatalytic efficiency of ZnO nanoflowers decreased due to the ultrasonic treatment. These findings provide structural insight into the photocatalytic activity of ZnO nanoflowers.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yanning Qu,Xiaojian Xu,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
ZnO is widely used as a photocatalyst in industry, however, it is still a challenge to degrade refractory antibiotics in water. In this study, a novel surface-functionalized N,S-doped carbon quantum dot (N,S-CQD) was synthesized and embedded into ZnO for the formation of a new ZnO/N,S-CQDs hybrid nanoflower via one-pot hydrothermal process. The as-prepared ZnO/N,S-CQDs showed significantly enhanced photocatalytic activity under visible and near-infrared (NIR) light irradiation, in which 72.8% of MG was decomposed after 180 min under NIR light. In addition, approximately 92.9% and 85.8% of ciprofloxacin (CIP) were degraded by ZnO/N,S-CQDs under simulated sunlight for 20 min and natural sunlight for 50 min, respectively. Furthermore, the mechanism was investigated and the results show that the surface functionalization, electron transfer, up-converted luminescence properties of N,S-CQDs, together with the highly reactive facets of ZnO nanoflowers, made great contributions to the enhanced photocatalytic activity of ZnO/N,S-CQDs. Additionally, the results of active species trapping experiments indicated that the hydroxide free radicals, holes and superoxide radical anions all played certain roles in the photocatalytic reaction. Finally, ZnO/N,S-CQDs was employed for photodegradation of antibiotics in actual water, the degradation efficiency of antibiotics still remained above 60% after 120 min. We believe that the ZnO/N,S-CQDs nanoflower is a promising photocatalyst for the degradation of refractory antibiotics under sunlight irradiation. The relatively low cost and excellent photocatalytic performance of ZnO/N,S-CQDs is beneficial for industrial applications.
研究领域:
环境科学
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材料科学
·
光催化技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yan Guo,Min Li,Tang Zhou,Qidi Wu,Chao Liu,Sheng Li,Quan Feng,Haihua Wang,Zhenyu Li
Simultaneously removing various contaminants from contaminated water with a low energy consumption remains challenging. Herein, we employed bacterial cellulose hydrogel (BCH) as a substrate and synthesized ZnO nanoflowers within its three-dimensional network via an in-situ synthesis approach, resulting in the formation of BCH/ZnO. Subsequently, the BCH/ZnO was processed through freeze-drying and heat-drying to fabricate a composite aerogel (BCA/ZnO-3) and a composite membrane (BCM/ZnO-3), respectively. The BCA/ZnO-3 exhibited remarkable adsorption capacities towards various contaminants and demonstrated a treatment capacity of 773.8 L m −2 in an injection-driven filter for real contaminated water. Meanwhile, the BCM/ZnO-3 was applied in ultrafiltration (UF) system with hydraulic pressure. At 2.5 bar, it exhibited a flux of 29.19 L m −2 h −1 and had a treatment capacity of 674 L m −2 for contaminated water. Moreover, the BCM/ZnO-3 showed a favorable antifouling performance and reusability. Experimental results and theoretical calculations revealed that both BCA/ZnO-3 and BCM/ZnO-3 perform UF and adsorption based on size screening, electrostatic interaction and hydrogen bonding. These processes simultaneously eliminated microorganisms, heavy metals, and small organic molecules (e.g., dyes and antibiotics). Moreover, these environmentally friendly materials can biodegrade in natural environments and have less environmental impact than other adsorptive membranes. Overall, the biohydrogel-based materials are promising alternatives to conventional petroleum-based membranes, offering effective and energy-efficient solutions for diverse water purification needs.
研究领域:
环境科学
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材料科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Xinxin Ren,Kaiyue Hu,Lingxia Qin,Di Wu,Zhiyong Guo,Sui Wang,Yufang Hu
The investigation on invertase (INV) and glucose oxidase (GOx)-dominated biological process offers a new opportunity for the development of clinical diagnosis and prognostic treatment. Herein, a ZnO nanoflowers (ZnONFs)-assisted DNAzyme-based electrochemical platform for INV- and GOx-dominated biosensing is proposed by the change of pH in microenvironment. In this strategy, INV can usually catalyze the dissolution of sucrose to generate glucose, and glucose is then consumed by GOx to produce H 2 O 2 and gluconic acid , in which ZnONFs can be effectively etched into free Zn 2+ ions. Subsequently, the released Zn 2+ ions have a shearing action for Zn 2+ -specific DNAzyme, thus triggering hybridization chain reaction along with the imbedding of methylene blue . The excellent electrochemical signals illustrate the method can be employed well for testing sucrose, INV and GOx with a low detection limit (0.019 μM, 0.047 mU/mL and 0.012 mU/mL, respectively). Finally, a series of basic and advanced logic gates (YES, AND, INHIBIT, and AND-AND-INHIBIT) in the biological process are constructed with different logic inputs, providing a valuable platform for the establishment of advanced molecular devices for bioanalysis and clinical diagnostics.
研究领域:
生物化学
·
分子生物学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Micromachines
·
2021
·Vol. 12
·期 8
·977
·
IF 2.891
Qi Mao,Weixuan Jing,Weizhuo Gao,Zhengying Wei,Bian Tian,Ming Liu,Wei Ren,Zhuangde Jiang
A novel and efficient enzymatic glucose sensor was fabricated based on Fe3O4magnetic nanoparticles (Fe3O4MNPs)-modified urchin-like ZnO nanoflowers (ZnONFs). ZnONFs were hydrothermally synthesizing on a flexible PET substrate. Fe3O4MNPs were deposited on the surface of the ZnONFs by the drop-coating process. The results showed that the urchin-like ZnONFs provided strong support for enzyme adsorption. For Fe3O4MNPs, it significantly promoted the redox electron transfer from the active center of GOx to the ZnO nanoflowers beneath. More importantly, it promoted the hydrolysis of H2O2, the intermediate product of glucose catalytic reaction, and thus improved the electron yield. The sensitivity of the Nafion/GOx/Fe3O4MNPs/ZnONFs/Au/PET sensor was up to 4.52 μA·mM−1·cm−2, which was improved by 7.93 times more than the Nafion/GOx/ZnONFs/Au/PET sensors (0.57 μA·mM−1·cm−2). The detection limit and linear range were also improved. Additionally, the as-fabricated glucose sensors show strong anti-interference performance in the test environment containing organic compounds (such as urea, uric acid, and ascorbic acid) and inorganic salt (for instance, NaCl and KCl). The glucose sensor’s service life was evaluated, and it can still maintain about 80% detection performance when it was reused about 20 times. Compared with other existing sensors, the as-fabricated glucose sensor exhibits an ultrahigh sensitivity and wide detection range. In addition, the introduction of Fe3O4MNPs optimized the catalytic efficiency from the perspective of the reaction mechanism and provided potential ideas for improving the performance of other enzymatic biosensors.Keywords:enzymatic glucose sensor;Fe3O4magnetic nanoparticles;ZnO nanoflowers;enzyme;electrochemical sensor
研究领域:
生物化学
·
材料科学
·
医学检测
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Afang Zhu,Tianhui Jiao,Shujat Ali,Yi Xu,Qin Ouyang,Quansheng Chen
Aflatoxins (AFs) contaminate agricultural products in a wide range of ways during their harvesting, storage and transport. Therefore, the detection of AFs has certain practical significance. Herein, a dispersive micro solid phase extraction (D-µSPE) technology was constructed based on 1-hexyl-3-methylimidazolium hexafluorophosphate ([HMIM][PF 6 ]) fabricated ZnO nanoflowers for AFs extraction from food matrix before HPLC procedure. The key parameters affecting the extraction efficiency were studied. Under optimal experimental conditions, the method showed excellent linearity with high correlation coefficients (≥0.994). LOD and LOQ were 0.034 and 0.114 μg/kg for AFB1, 0.024 and 0.082 μg/kg for AFB2, 0.067 and 0.226 μg/kg for AFG1 and 0.025 and 0.084 μg/kg for AFG2. The recovery of actual samples spiked with analytes (at 5, 15 and 20 μg/kg) were from 93.8 to 105.1%. Overall, an accurate AFs analysis method was developed and could be applied to the determination of AFs in various food and agricultural products.
研究领域:
食品科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Dandi Zhou,Zhanjia Kang,Xiaohua Liu,Weiyu Yan,Haolin Cai,Jiaqiang Xu,Dongzhi Zhang
A Quartz crystal microbalance (QCM) ammonia sensor with ZnO nanoflowers (NFs) doped with cellulose acetate nanofiber (CA) nanofibers and polyaniline-modified nanocomposites (CA/PANI/ZnO) is presented in this paper. The CA/PANI composite was firstly produced by electrostatic spinning and further oxidative polymerization, and then three-dimensional self-assembled ZnO NFs was synthesized by further solvothermal method , and the two were blended to obtain the ternary CA/PANI/ZnO composite with high specific surface area. The morphology and elemental composition of the fabricated composite nanomaterials were tested and analyzed by a series of characterization techniques. The experimental results showed that the QCM sensor based on CA/PANI/ZnO composite nanomaterials at room temperature exhibited good performances over a wide range of ammonia concentrations (1–70 ppm), such as high sensitivity (4.54 Hz/ppm), short response recovery time (15 s/10 s), high linearity and high selectivity. The electrical parameters of the sensor are obtained by the impedance analyzer, and the quality factor is further calculated. The potential synergistic interaction between the composites is the key for ammonia adsorption. The results show that the sensor is expected to be a potential candidate for ammonia detection.
研究领域:
材料科学
·
传感技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Minghui Niu,Chengwei Shan,Chenlong Xue,Xiaowei Xu,Aoyan Zhang,Yihong Xiao,Junyu Wei,Defeng Zou,Gina Jinna Chen,Aung Ko Ko Kyaw,Perry Ping Shum
The excellent photoelectric conversion efficiency and tunable bandgap of metal halide perovskites make them highly suitable for SERS applications. However, the low stability of perovskites in water and oxygen greatly hinders their use in SERS detection, particularly in biomolecule detection applications, which often require water-based test solutions. Herein, we report a gold (Au)/perovskite-polyvinylidene difluoride (PVDF) nanocomposite/ZnO nanoflower (GPPZ) SERS substrate capable of functioning in aqueous solutions. Its enhancement ability is attributed to plasmon-induced resonance energy transfer (PIRET) and an electromagnetic mechanism. The surface plasmon resonance created by ultrathin Au and ZnO nanoflowers induces resonance energy transfers to the perovskite via PIRET, facilitating a quasi-matched charge transfer between the perovskite and the probe molecule. The PVDF coating protects the perovskite from water and oxygen without affecting the resonance energy-transfer process. As a result, an enhancement factor (EF) approaching 1 × 106 was achieved for the crystal violet molecule. Additionally, we fabricated a flexible GPPZ substrate using silk screen printing, enabling mass production of an SERS array substrate. The printed flexible GPPZ substrates demonstrated micromole-level cysteine detection with an EF of 6.8 × 105, showing potential for application in hyperhomocysteinemia diagnosis.
研究领域:
材料科学
·
光学
·
生物医学检测
✓ 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）