CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yujie Zhang,Rongfang Yuan,Huilun Chen,Beihai Zhou
Combining adsorption and photocatalysis as a synergistic technique has become a research trend since adsorption is a prerequisite for photocatalytic surface reactions. In this study, a Z-scheme heterojunction FeTiO 3 @Ag/Ag 2 O with local surface plasmon resonance (LSPR) effect was fabricated for the removal of dimethoate from water. Under visible light irradiation, dimethoate could be completely removed within 75 min in the presence of 0.3 g/L FeTiO 3 @Ag/Ag 2 O (with Ag 2 O percentage of 10 wt%). High removal efficiency of dimethoate was mainly attributed to the synergistic effect between the large specific surface area of the catalyst (160.695 m 2 /g), the formation of heterojunction of FeTiO 3 and Ag 2 O, and the LSPR effect of metal Ag, which reinforced the absorption of visible light and promoted the separation and transfer of the carriers. Radicals of O 2 − and OH were the main reactive groups triggered the photocatalytic degradation process of dimethoate. Density Functional Theory (DFT) calculations indicate that P S and P–S bonds in the dimethoate molecule were more susceptible to be attacked by reactive groups. The degradation pathways mainly include oxidation of P S bond and cleavage of P–S bond, and the toxicity of most intermediates was reduced when compared with the parent compound. This study exploited the role of adsorption and photocatalysis in the field of pollutant removal, and provides ideas for the preparation of bifunctional photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Hao-Jia Qin,Shuai Zhao,Hua-Ping Gong,Zhi Yu,Yufeng Wang,De Zhang,Pei Liang
Antibiotic residue detection plays a key role in ensuring human health. However, rapid, reliable, and highly sensitive detection methods are still insufficient. To tackle this challenge, in this study, the Au@Ag/Ce-UIO-66, a nanocomposite material consisting of bimetallic gold core and silver shell (Au@Ag) introduced on the surface of Ce-UIO-66, was successfully synthesized. By meticulously regulating the exact concentration and volume of silver nitrate, we successfully generated an optimal matrix. This significantly enhanced the detection capability of the probe molecule CV to an impressive concentration of 10 −9 M, with a remarkably low relative standard deviation of 7.54 %. The matrix exhibits excellent surface-enhanced Raman scattering (SERS) performance and stability, reaching adsorption equilibrium within 30 min. Moreover, employing this substrate enables the detection of sulfadiazine at concentrations as minimal as 2.5 μg/L, significantly surpassing the standards set by the European Union. Notably, the Raman spectral signal of sulfadiazine maintains stability across various pH conditions at a concentration of 10 −5 M. Finally, the adsorption mechanism and enhancement mechanism between Au@Ag/Ce-UIO-66 and sulfadiazine were explored.
✓ 已验证
产品关联
DOI
高影响因子
Chemosensors
·
2024
·Vol. 12
·期 5
·82
·
IF 3.7
Minghui Yu,Chongyang Qin,Zhi Yu,Biao Sun,Dejiang Ni,De Zhang,Pei Liang
Surface-enhanced Raman scattering (SERS) provides an alternative rapid detection method for pesticide residues in food, but fenvalerate possesses poor affinity to the novel metal substrate, thus restricting its analysis. To break this bottleneck, a SERS-active platform with an Ag/rGO composite structure was engineered using a facile method for fenvalerate detection. Ag nanoparticles with a 60 nm diameter can grow evenly on the top and bottom of rGO layers under intense ultrasonic oscillation, and rGO in hybrid material acts as an ideal hotspot holder between the gaps of Ag nanoparticles, not only allowing the interaction area to be enhanced both electromagnetically and chemically but also enabling the capture and enrichment of fenvalerate pesticide molecules into the “hotspot” area to improve detection sensitivity. Ag/rGO composite substrate possesses superior SERS performance with an ultralow detectable concentration of 4-aminothiophenol (10−10M) and good reproducibility, endowing the material with a better enhancement effect than pure Ag nanoparticles. When used as the SERS substrate for fenvalerate detection, Ag/rGO composite material showed excellent performance in both experiments and theoretical calculation, with the limit of detection (LOD) of fenvalerate being as low as 1.69 × 10−5mg/kg and a detection model with an R2of 99.2%, demonstrating its exciting potential as a SERS substrate for pesticides detection.
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Yichi Liu,Yi Liu,Wenjing Chen,Xiaowu Hu,Yinshui He,Yan Ma,Yuqiong Xie,Wenxing Luo,Lixiang Luo,Lan Jiang,Xiongxin Jiang,Qinglin Li
CdS has been shown to be an excellent photon trap with strong absorption of light at visible and near-infrared wavelengths. The use of CdS for phase change material (PCM) modification can significantly improve its photothermal conversion performance. However, due to the unique energy band structure of CdS, the difficulty in electron conduction leads to poor thermal conductivity . This problem can be improved by introducing high thermal conductivity nanometals for modification, however, the effective combination of CdS and nanometals has been challenging. In this study, a new preparation strategy is demonstrated, in which Ag nanoparticles (NPs) with similar lattice parameters and crystalline coordination to CdS is first introduced on the surface of carbonized melamine foam (CMF), followed by the introduction of CdS NPs. This similar structure helps to form a better interfacial bond between CdS and Ag. The resulting stabilized structure enables the composite phase change material (CPCM) to achieve 96.1 % PEG loading with an ultra-high photothermal conversion efficiency of 94.6 %, thermal conductivity of 0.61 W/m∙K, and excellent antimicrobial activity. This study provides valuable guidance for the engineering design of CPCM with high photothermal conversion performance and suggests its practical application value in seawater evaporation and thermal management of medical devices .
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huanyu Zhuang,Xiaoyu Li,Xin Du
Bacterial infections represent one of the foremost threats to global human health. Furthermore, the misuse of antibiotics has exacerbated the public health crisis. Therefore, the development of high-performance novel antibacterial materials is of utmost importance. However, there are still several issues regarding the antibacterial performance and recyclability of existing antibacterial materials. To address these issues, this study synthesized a core@shell@shell@satellite structured Fe 3 O 4 @SiO 2 @polydopamine (PDA)@tannic acid (TA)@Ag nanocomposite, aiming to achieve excellent photothermal effect and synergistic antibacterial activity with silver. The composite particles exhibited improved dispersibility due to the SiO 2 coating. The modification of TA on the Fe 3 O 4 @SiO 2 @PDA achieved the uniform loading of silver nanoparticles (NPs), which significantly enhanced the photothermal conversion efficiency (η) of up to 74.9 %. Additionally, the superparamagnetic property facilitated magnetic separation, ensuring the efficient recovery and reutilization of the nanocomposites. Under low concentration and low-power near-infrared (NIR) light irradiation (808 nm, 1.0 W cm −2 ), the nanocomposite demonstrated excellent synergistic antibacterial activity, achieving efficient eradication of Escherichia coli (100 %) and Staphylococcus aureus (98 %). Furthermore, the material could be recycled up to five times without significant loss of antibacterial activity. Overall, our approach demonstrates the potential of novel multifunctional composite NPs in the treatment of bacterial infections and the sustainable application of antibacterial agents.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Dong Zhang,Ping Yan,Hong Yu,Jing Sun,Shuyun Zhu,Xian-En Zhao
Development of accurate, convenient and portable methods for monitoring 4-aminophenol (4-AP) is extremely important because of its strong toxicity. Here, a ratiometric fluorescence sensor based on Ag + -enhanced luminescence of Tb-DNA complexes has been presented for the detection of 4-AP. The luminescence of Tb-DNA complexes is enhanced about 30 times by Ag + , which can trigger energy transfer from DNA to Tb 3+ more efficiently. In the presence of 4-AP, Ag + can be reduced into Ag 0 owing to its strong reducibility, inducing the decrease of Tb-DNA complexes at 545 nm remarkably. Besides, 4-AP exhibits intrinsic fluorescence at 375 nm under the same conditions. Therefore, ratiometric detection of 4-AP can be achieved using F 375 /F 545 as readout with a detection limit of 0.4 μM. Real water samples have been tsted to evaluate this method in practical application and satisfactory results have been obtained. Furthermore, the addition of 4-AP into Tb-DNA-Ag + system induces a visible color variation from green to bluish violet, enabling visual detection of 4-AP under the assistance of a smartphone.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Yu Lu,Xiufang Mo,Geng Zhu,Yan Huang,Yingchao Wang,Zhenzhong Yang,Liqiong Gao,Guofang Shen,Yi Wang,Xiangwei Zhao
Practical gas sensing application requires sensors to quantify target analytes with high sensitivity and reproducibility. However, conventional surface enhanced Raman scattering (SERS) sensor lacks reproducibility and quantification arising from variations of "hot spot" distribution and measurement conditions. Here, a ratio-dependent SERS sensor was developed for quantitative label-free gas sensing. Au@Ag-Au nanoparticles (NPs) were filtered onto anodic aluminum oxide (AAO) forming Au@Ag-Au@AAO SERS substrate. 4-MBA was encapsulated in the gap of Au@Ag-Au and served as the internal standard (IS) to calibrate SERS signal fluctuation for improved quantification ability. Combined with headspace sampling method, SO 2 residue in traditional Chinese medicine (TCM) can be extracted and captured on the immediate vicinity of Au@Ag-Au surface. The intensity ratio I 613 cm −1 /I 1078 cm −1 showed excellent linearity within the range of 0.5 mg/kg-500 mg/kg, demonstrating superior quantification performance for SO 2 detection. Signals for concentration as low as 0.05 mg/kg of SO 2 could be effectively collected, much lower than the strictest limit 10 mg/kg in Chinese Pharmacopoeia. Combined with a handheld Raman spectrometer, handy and quantitative TCM quality evaluation in aspect of SO 2 residue was realized. This ratiometric SERS sensor functioned well in rapid on-site SO 2 quantification, exhibiting excellent sensitivity and simple operability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 9
·4591-4599
·
IF 5.8
Ouyang Lin,Lijin Wang,Xiulin Xie,Shuaibing Wang,Yibo Feng,Jiawen Xiao,Yu Zhang,Aiwei Tang
Silver-based I–III–VI-type semiconductor nanocrystals have received extensive attention due to their narrow-band luminescence properties. Herein, we demonstrated a seed-mediated growth of quaternary Ag–In–Ga–S (AIGS) nanocrystals (NCs) with narrow-band luminescence. By conducting partial cation exchange with In3+ and Ga3+ based on Ag2S NCs and controlling the Ag/In feeding ratios (0.25 to 2) of Ag–In–S seeds as well as the inventory of 1-dodecanethiol, we achieved optimized luminescence performance in the synthesized AIGS NCs, characterized by a narrow full width at half maximum of less than 40 nm. Meanwhile, narrow-band luminescent AIGS NCs exhibit a tetragonal AgGaS2 crystal structure and a gradient alloy structure, rather than a core–shell structure. Most importantly, the kinetics decay curves of time-resolved photoluminescence and the ground state bleaching in transient absorption generally agree with each other regarding the lifetime of the second decay component, which indicates that the narrow-band luminescence is due to the slow radiative recombination between trapped electrons and trapped holes located at the edge of the conduction band and the deep silver-related trap states (e.g., silver vacancy), respectively. This study provides new insights into the correlation between the narrow-band luminescence properties and the structural characteristics of AIGS NCs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Lin Ai,Hui Ding,Yutong Jiao,Zeling Zhou,Xiao-Feng Wu,Peidong Li,Shengjun Huang
In the field of heterogeneous catalysis, the selective hydrogenation of α,β-unsaturated aldehyde to α,β-unsaturated alcohol is a prominent focus in the synthesis of fine chemicals. Herein, we present a straightforward protocol for constructing hierarchical zeolite supported catalysts for the gas-phase selective hydrogenation of α-methylacrolein to methallyl alcohol. Compared to the original microporous zeolite, the incorporation of mesoporous channels within the hierarchical zeolite gives rise to ample space to embed Ag nanoparticles, thereby delivering a positive effect on enhancing accessibility to metal active sites and leading to increased reactivity. Moreover, unlike the typical transition metals (Pt, Ni, Cu and Co), the unique surface properties of metal Ag inherently plays a crucial role in the formation of a desirable adsorption configuration. The resulting vertical orientation (on-top η1-σ(O) mode) causes the carbonyl group to interact with the Ag active sites via the terminal oxygen atom, while the C=C bond tilts away from the metal surface. Specifically, the selectivity to the targeting methallyl alcohol reaches ~75% over the hierarchical ZSM-5 and Silicalite-1 supported Ag catalysts under optimal reaction conditions. This discovery highlights the significance of pore architecture and adsorption configuration on the catalytic performance, and aims to deepen understanding for the rational design of heterogeneous catalysts in the gas-phase selective hydrogenation of α,β-unsaturated aldehydes.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Xinhui Shu,Ping Guo,Gan Zhang,Wei Zhang,Hong Hu,Juan Peng,Yonghua Xiong,Bingfeng Ma,Weihua Lai
Pyrimethanil (PYR) is a fungicide that is harmful to consumers when present in foods at concentrations greater than maximum permitted residue levels. High-performance immunoprobes and dual-readout strategy may be useful for constructing sensitive lateral flow immunoassay (LFIA). Herein, the prepared litchi-like Au–Ag bimetallic nanospheres (LBNPs) exhibited high mass extinction coefficients and fluorescence quenching constants. Benefiting from LBNPs and dual-readout mode, the limits of detection of LBNPs-CM-LFIA and LBNPs-FQ-LFIA for PYR were 0.957 and 0.713 ng mL −1 , which were 2.54- and 3.41-fold lower than that of gold nanoparticles-based LFIA, respectively. The limits of quantitation of LBNPs-CM-LFIA and LBNPs-FQ-LFIA were 3.740 and 1.672 ng mL −1 , respectively. LBNPs-LFIA was applied to detect PYR in cucumber and grape samples with satisfactory recovery (90%–111%). LBNPs-LFIA showed good agreement with LC-MS/MS for the detection of PYR in the samples. Accordingly, this sensitive and accurate dual-readout LFIA based on LBNPs can be effectively applied for food safety.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Kang Shen,Caili Bi,Haifan Yang,Miaowen Xu,Lili Huang,Youwei Wang
Based on the coordination principle of Lewis acid, the 4-mercaptophenylboronic acid (4-MPBA)-modified novel dumbbell-shaped Au-Ag nanorods (4-MPBA@DS Au-AgNRs) substrate has been developed, which could be combined with the surface-enhanced Raman scattering (SERS) technique to detect SO42- with high sensitivity and specificity. DS Au-AgNRs synthesized in this paper with dumbbell particular structure have been verified by finite-difference time domain (FDTD) simulation to be capable of stimulating strong localized electromagnetic enhancement (EM) at nano-edge, gap, generating a large number of “hot spots” exhibiting excellent SERS performance. The 4-MPBA modified on its surface could specifically recognize SO42-, producing a change in the spectral peak at 1382 cm-1, thus realizing highly sensitive and specific sensing of SO42-. Under optimized conditions, this SERS sensor responded rapidly to SO42- within 2 minutes and demonstrated uncommon immunity. Ratio calculation by the ratio of the characteristic peaks at 1382 and 1070 cm-1 (I1382/I1070) enabled quantitative detection of SO42- in the range of 1 × 10-8-1 × 10-3 M, and the detection threshold was as low as 1 nM, which was superior to that of similar detection methods. Importantly, the utility and reliability of this SERS substrate for the determination of SO42- in actual samples were evaluated using ion chromatography as the gold standard, and there was no significant difference between the two protocols (P > 0.05), and the RSD was less than 6% with a satisfactory recovery rate (97.6-102.3%). Therefore, the present protocol has the advantages of simplicity and rapidity, high sensitivity, specificity, stability, and practicability in the determination of SO42- in aqueous solution, providing a reliable solution for tracing SO42- in the field of food safety and environmental testing.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Zongbing Li,Xiangmin Miao,Ke Xing,Xue Peng,Aihua Zhu,Liansheng Ling
A novel electrochemical biosensor for Hg 2+ detection was reported by using DNA-based hybridization chain reaction (HCR) coupled with positively charged [email protected] core-shell nanoparticles ((+) [email protected] CSNPs) amplification. To construct the sensor, capture probe (CP ) was firstly immobilized onto the surface of glass carbon electrode (GCE). In the presence of Hg 2+ , the sandwiched complex can be formed between the immobilized CP on the electrode surface and the detection probe (DP) modified on the gold nanoparticles (AuNPs) based on T-Hg 2+ -T coordination chemistry. The carried DP then opened two ferrocene (Fc) modified hairpin DNA (H 1 and H 2 ) in sequence and propagated the happen of HCR to form a nicked double-helix. Numerous Fc molecules were formed on the neighboring probe and produced an obvious electrochemical signal. Moreover, (+) [email protected] CSNPs were assembly onto such dsDNA polymers as electrochemical signal enhancer. Under optimal conditions, such sensor presents good electrochemical responses for Hg 2+ detection with a detection limit of 3.6 pM. Importantly, the methodology has high selectivity for Hg 2+ detection.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）