CERAMICS INTERNATIONAL
·
2020
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IF 3.83
Xiaoyu Zhu,Peng Liu,Ting Xue,Yu Ge,Shirong Ai,Yingying Sheng,Ruimei Wu,Lulu Xu,Kaijie Tang,Yangping Wen
A new bifunctional intelligent nanosensing platform based on graphene-like titanium carbide MXene (Ti 2 C MXene)/Au–Ag nanoshuttles (NSs) for both electrochemical and surface-enhanced Raman scattering (SERS) intelligent analysis of ultra-trace carbendazim (CBZ) residues in tea and rice coupled with machine learning (ML) was successfully designed. Ti 2 C MXene was synthesized by selectively etching Al layers of Ti 2 AlC with hydrofluoric acid and high-temperature calcination . Ti 2 C MXene/Au–Ag NSs prepared by the ultrasonic dispersion of graphene-like Ti 2 C MXene into Au–Ag NSs solution under dark conditions displayed large and rough surface, enhanced conductivity, excellent electrochemical response, prominent Raman enhancement, and high stability. The ML via different algorithms such as artificial neural network, support vector machine, and relevance vector machine (RVM) for the intelligent analysis of CBZ was contrasted and discussed. RVM displayed more superiority for the electrochemical analysis of CBZ in a wide linear range of 0.006 – 9.8 μM with low limit of detection (LOD) of 0.002 μM and SERS detection of CBZ in the wide linear range of 0.033 – 10 μM with low LOD of 0.01 μM. This will provide a new bifunctional intelligent sensing platform via different ML algorithms for improving accuracy of sensor via mutual verification of two or more methods of detection and a new bifunctional nanosensing platform based on the development of graphene-like nanohybrid for food and agro-products safety.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Hongrui Zhu,Chun Zhang,Kefeng Xie,Xingang Li,Guangfu Liao
Defect engineering, exposed crystal facets, and Z-scheme mechanism are promising strategies to greatly promote photocatalytic performance. Herein, the ZnFe 2 O 4 (ZFO) with Ag-doping, oxygen vacancies and different exposed crystal facets was firstly prepared by a facile hydrothermal strategy. Subsequently, the MoS 2 flowers were in-situ grown on the surface of the prepared Ag-doping ZFO (Ag-ZFO) for fabricating MoS 2 /Ag-ZFO Z-scheme heterojunction by hydrothermal strategy. Due to the synergistic effects of defect engineering (Ag-doping and oxygen vacancies), exposed crystal facets, and Z-scheme mechanism, the photocatalytic activity for tetracycline degradation was evidently improved. More importantly, the prepared MoS 2 /Ag-ZFO (T) also show excellent photocatalytic performance under real environment water. This work offers a new insight for future design and development of highly active photocatalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yixuan Zhang,Cong Liu,Ye Zhou,Jinnan Wang,Aimin Li,Philippe François-Xavier Corvini
Hollow double-shelled Ag@SrTiO 3 -TiO 2 with Z-scheme heterostructure was constructed for highly efficient photocatalytic reduction of nitrate to N 2 . The 3D finite-difference-time-domain analysis indicated that hollow double-shelled structure improved light harvesting due to multiple reflections. Photo-generated electrons transfer from SrTiO 3 to Ag 0 caused by electron sink effect were utilized to reduce nitrate, while photo-generated electrons of TiO 2 migrated to SrTiO 3 via transport bridge of Ti 3+ defects for electron–hole recombination. Such charge carriers migration pathway facilitated the construction of Z-scheme heterostructure, which enhanced charge separation yet still retained high redox powers. Both photogenerated electrons and CO 2 − played important role in photocatalytic denitrification. Furthermore, Ag 0 acted as co-catalyst which not only promoted photogenerated electrons transfer to nitrate but also enhanced nitrate conversion selectivity to N 2 . Combining the above advantages, nitrate removal rate and the nitrogen selectivity reached 97.2 % and 98.8 % within 60 min, respectively. Even after five cycles, it still remained satisfied photocatalytic activity and stability. In summary, this work proposed a feasible strategy to construct Z-scheme hollow double-shelled photocatalyst for efficient photocatalytic denitrification.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiaojiao Jiao,Zexiang Wang,Jing Wang,Tiantian Yao,Zongliang Chen,Chen Chen,Li Sun,Xian Zhao,Weiliu Fan
The reasonable design of g-C 3 N 4 (CN)-based homojunctions is a promising method to improve the photocatalytic performance. Controlling the interfacial charge-transport process is challenging. Herein, Ag and P-doped CN (ACN and PCN) were selectively synthesized. The band edges of CN move downward continuously with increasing Ag or P doping concentration. CN/4ACN (type-II), CN/8PCN (S-scheme) and 4ACN/8PCN (S-scheme) were formed by suitable energy level matching, and their charge transfer mechanisms were confirmed via VB-XPS, UPS and ESR analysis. In the presence of the hole sacrificant triethanolamine (TEOA), both CN/4ACN and 4ACN/8PCN exhibited better H 2 evolution reaction (HER) rate than CN/8PCN due to the improvement in conductivity caused by Ag doping. However, only CN/8PCN and 4ACN/8PCN exhibited HER coupled with tetracycline (TC) degradation performance owing to the high redox potential of the S-scheme. Benefiting from a good carrier transport property and high redox potential, 4ACN/8PCN exhibited the best HER rate (2305.6 μmol·g −1 ·h −1 ) with TEOA as the hole sacrificant, which was 11.7 times than that of pure CN, respectively, and achieved a high HER rate (117.8 μmol·g −1 ·h −1 ) coupled with simultaneous TC degradation. This study provides a basic understanding of CN homojunctions, which shows potential for expanded applications in photocatalytic H 2 evolution and pollutant degradation.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Boyuan Tu,Kaifu Yu,Dengjiang Fu,Li Zhou,Ruixiang Wang,Xinying Jiang,Huanhuan Liu,Xin Cao,Xiang Gong,Rong He,Yongjian Tang,Tao Chen,Wenkun Zhu
Photo-assist uranium extraction from fluorine-containing uranium wastewater by building semiconductor-plasma material heterostructure is a forward-looking strategy, which not only effectively accelerates F-U separation via the LSPR effect but also impacts the intensity of binding between U (VI) and site. Here, we developed an amino-rich Ag-NWs/NH 2 -MIL-125(Ti) (AgNW/N-M(Ti)) hybrid nanowires with LSPR effect for photo-assist uranium extraction. Accordingly, the AgNW/N-M(Ti) hybrid nanowires presented 90.4% removal efficiency for U(VI) without a sacrificial agent at the U: F molar ratio of 1:20. By virtue of In-situ KPFM, we identify hot electrons generated over AgNW were transferred to amino-rich N-M(Ti) to efficiently reduce the U(VI) adsorbed on the N-M(Ti), which effectively enhances the excellent uranium removal performance of AgNW/N-M(Ti) hybrid nanowires. This strategy may open a paradigm for the development of advanced heterojunctions with the LSPR effect as catalysts for photo-assisted uranium extraction from fluorine-containing uranium wastewater.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Xing Dai,Xiaohan Liu,Tao Xu,Chenjie Gu,Feiyu Zhao,Tao Jiang
Controlled aggregation of noble metal nanoparticles is incredibly crucial for obtaining reliable surface-enhanced Raman scattering (SERS) properties. Here, a rational agglomeration of large Ag nanowires (NWs) and small Ag nanocubes (NCs) was readily facilitated by simply utilizing the intrinsic viscosity of adhesive tape , leading to the generation of abundant electromagnetic “hotspots” around the numerous crossed nanotips and ultra-small nanogaps. After the molecular enrichment efficiency was further promoted by exploiting a hydrophilic-hydrophobic strategy, an ultra-low limit of detection as 8.8 × 10 −11 M was demonstrated for rhodamine 6 G. Benefiting from the high sensitivity of the SERS chip, its application in the determination of clinical sample containing mixed gefitinib and ritonavir was finally proved, facilitating impressive specificity and accuracy. Considering the simplicity and reliability, our strategy has great potentials to be applied in clinical blood drug identification and concentration monitoring.
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ANALYTICAL CHEMISTRY
·
2023
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IF 7.4
Rihui Su,Gongke Li,Xiaohua Xiao
In this work, Ag nanoparticles (AgNPs) were embedded into a poly(N-isopropylacrylamide)-laponite (Ag/PNIP-LAP) hydrogel membrane for highly sensitive surface-enhancement Raman scattering (SERS) detection. In situ polymerization was initiated by UV light to encapsulate AgNPs in a PNIP-LAP hydrogel to prepare a highly active SERS membrane with a three-dimensional structure. Due to the surface plasmon resonance and high swelling/shrinkage ratio of the Ag/PNIP-LAP hydrogel SERS membrane, its network structure has a “sieving” effect, which makes it easier for hydrophilic small-molecule targets to enter the sterically confined hydrogel, and the AgNPs are close to each other to form a Raman “hot spot” through the shrinkage of the hydrogel, at the same time, the analyte is enriched in the confined space and close to the AgNPs to form a stronger SERS signal. The characterization of the SERS activity of the Ag/PNIP-LAP hydrogel showed that the prepared three-dimensional membrane had high detection sensitivity for urotropine, 2,5-dimethylpyrazine, pyrazinamide, and pyrazine; the detection limits (S/N = 3) were 17.4, 31.0, 53.1, and 1.11 μg/L, and the analytical time was 35 min. Due to the hydrophilicity of the Ag/PNIP-LAP hydrogel membrane, the small molecules can easily enter the SERS membrane, and the hydrophobic macromolecules are blocked outside the SERS membrane. The SERS method has good selectivity, stability, and reproducibility. The SERS method was applied to the detection of urotropine in dried bean curd sticks, 2,5-dimethylpyrazine in nuts and potato chips, and pyrazinamide in human plasma with recoveries of 81.8–116.8% and the relative standard deviation within 4.9–9.9%. The results matched well with that found by the corresponding chromatographic methods. The proposed method has the advantages of simple sample pretreatment, speediness, high sensitivity, and good selectivity to hydrophilic compounds and has potential application in the rapid on-site detection.
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PubMed
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OPTICS COMMUNICATIONS
·
2018
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IF 1.887
Wu Yang,Wanlu Zhang,Guilin Zhang,Jiatao Zhu,Guoxing He,Ruiqian Guo
We reported two types of tunable white LEDs (WLEDs) based on high quality the single emissive InP/ZnS quantum dots (QDs) and the dual emissive Ag:InP/ZnS QDs via myristic acid (MA) passivation and Ag doping. The WLEDs with three color InP/ZnS QDs could realize color rendering indices (CRIs) of 97–98, color quality scales (CQSs) of 94–98, and limited luminous efficacies (LLEs) of 238–246 lm/W at correlated color temperatures (CCTs) of 2700 K to 6500 K, and the WLEDs with dual emissive Ag:InP/ZnS and red emissive InP/ZnS QDs could realize CRIs of 90–93, CQSs of 90–93, and LLEs of 223–242 lm/W at CCTs of 2700 K to 4000 K. Finally, their luminous efficacies were estimated.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
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IF 3.779
Xin Wang,Benqing Zhou,Youming Zhang,Liwei Liu,Jun Song,Rui Hu,Junle Qu
A novel ternary nanohybrid comprising Ag nanoparticles anchored on black phosphorus nanosheets (BPNS) supported on the surface of graphene oxide (GO) has been synthesized for the first time. UV–Vis spectra and X-ray photoelectron spectroscopy results revealed that BPNS with highly active P atoms on its surface served as a strong reductant to reduce Ag precursor and the emerging Ag atoms were consequently deposited on its surface. The Ag-BPNS/GO nanohybrid showed excellent photocatalytic activity towards the degradation of methylene blue under solar light irradiation. Broad spectrum response of BPNS, effective trapping of the electrons of Ag nanoparticles and high stability of Ag-BPNS on GO surface contributed the enhanced photocatalytic performance. A plausible mechanism has been proposed to explain the enhanced photocatalytic performance of the Ag-BPNS/GO nanohybrid.
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Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 28
·7557-7567
·
IF 5.976
Ting-Yang Xing,Jing Zhao,Guo-Jun Weng,Jian-Jun Li,Jian Zhu,Jun-Wu Zhao
By increasing the pH value of the reaction solution and introducing a small amount of ascorbic acid, Ag/Au nanoparticles with small tips and two surface plasmon resonance (SPR) modes have been prepared. The formation of the two SPR modes results from the different shell and core Au/Ag ratios, which relies on the enhanced dealloying rate of the shell and the weakened cavitating rate of the core under high pH conditions. Then, these Ag/Au nanoparticles have been used in the ultrasensitive detection of Hg2+ and Pb2+ based on the resultant absorption intensity decrease of peaks I and II, which originates from the specific dissolution of Ag and the accelerated speed of the reaction between Na2S2O3 and Au, respectively. The results showed an excellent limit of detection (LOD) of 5 nM for Hg2+ and 1.4 nM for Pb2+, and linear ranges from 30 to 400 nM and from 3 to 180 nM, respectively. Meanwhile, we believe that these bimetallic nanoparticles have widespread applications in sensing and modulating pH based on the dealloying rate of the shell and the cavitating rate of the core which can be extended to the synthesis of other dual-functional metallic nanoprobes.
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LANGMUIR
·
2024
·
IF 3.7
Adugna Boke Abdeta,Feyisa Wedajo,Qinhan Wu,Dong-Hau Kuo,Ping Li,Hanya Zhang,Ting Huang,Jinguo Lin,Xiaoyun Chen
Cellulose plays a significant role in designing efficient and stable cellulose-based metallic catalysts, owing to its surface functionalities. Its hydroxyl groups are used as anchor sites for the nucleation and growth of metallic nanoparticles and, as a result, improve the stability and catalytic activity. Meanwhile, cellulose is also amenable to surface modifications to be more suitable for incorporating and stabilizing metallic nanoparticles. Herein, the Ag-/Bi-doped Mo(S,O)3 trimetallic sulfo-oxide anchored on B and N codoped cellulose (B–N–C) synthesized by a facile approach showed excellent stability and catalytic activity for PHER at 573.28 μmol/h H2 with 25 mg of catalyst under visible light, and 92.3% of the 4-nitrophenol (4-NP) reduction was achieved within 135 min by in situ-generated protons. In addition to B and N codoping, our use of the calcination method for B–N–C preparation further increases the structural disorders and defects, which act as anchoring sites for Ag-/Bi-doped Mo(S,O)3 nanoparticles. The Ag-/Bi-doped Mo(S,O)3@B–N–C surface active site also stimulates H2O molecule adsorption and activation kinetics and reduces the photogenerated charge carrier’s recombination rate. The Mo4+ → Mo6+ electron hopping transport and the O 2p and Bi 6s orbital overlap facilitate the fast electron transfer by enhancing the electron’s lifetime and photoinduced charge carrier mobility, respectively. In addition to acting as a support, B–N–C provides a highly conductive network that enhances charge transport, and the relocated electron in B–N–C activates the H2O molecule, which enables Ag-/Bi-doped Mo(S,O)3@B–N–C to have appreciable PHER performance.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Rui Li,Haoyu Feng,Shancan Wang,Di Zhuang,Youhong Wen,Jie Zhu
A double-layer film was developed with tannic acid (TA) co-pigmented purple potato anthocyanin extract (PAE)-agar as the inner layer, and K-carrageenan-oregano essential oil Pickering emulsion (OPE)/silver nanoparticles (TA-AgNPs) as the outer layer. Molecular docking and FT-IR results elucidated that intermolecular hydrogen bond was the main interaction between components in the agar-carrageenan matrix, with TA and PAE contributing to intensified anthocyanin color through π-π stacking. The incorporation of OPE/TA-AgNPs enhanced the film's hydrophobicity (WCA > 100 ° ) and UV–vis barrier (close to 0% at 200-320 nm, effectively impeding UVA, UVB, and UVC) properties and exhibited outstanding antioxidant (DPPH scavenging rate > 88%) and antimicrobial activities. This film showed a significant color change in the pH range of 2–12 (from pink to yellow) and a considerable sensitivity to volatile amines within 2 min. The films effectively alleviated beef spoilage (extending the shelf life of beef for 1d) and reflected the freshness of beef during storage. Additionally, the digital color information of the film was obtained by a smartphone combined with RGB values analysis to quantify the freshness of beef rapidly. Therefore, this study expands the application of food packaging films with freshness preservation and monitoring in the field of animal-derived food.
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