MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Hao Yuan,Huangmei Zhou,Yu Zhao,Hao Tan,Rodolphe Antoine,Sanjun Zhang
Metal nanoclusters (NCs) have emerged as a class of promising luminescent materials for sensing, but the low luminescence efficiency hindered their applications. In this work, highly luminescent composites were synthesized by encapsulating D-penicillamine (DPA) capped silver nanoparticle-nanoclusters (AgNP-NCs) into zeolitic imidazolate frameworks (ZIF-8) (denoted as AgNP-NCs@ZIF-8) and were applied for simultaneous detection and removal of chromium(Ⅵ). The photoluminescence intensity of the AgNP-NCs was enhanced by (66 ± 5) folds due to the confinement of ZIF-8 shell, and the lifetime was prolonged from (50.9 ± 1.8) ns to (15.9 ± 0.4) μs. More importantly, thanks to the strong luminescent property of AgNP-NCs and porous structure of the ZIF-8 shell, the AgNP-NCs@ZIF-8 composites not only allowed for the detection of Cr(Ⅵ) as luminescent probe but also exhibited good adsorption capacity of Cr(Ⅵ). The luminescence intensity decreased linearly with Cr(Ⅵ) concentration in the range of 40 to 400 μM, and the limit of detection was determined to be (23.5 ± 0.8) μM. They also exhibited high selectivity toward total chromium in various interfering metal ions and good performance in real water samples. These results indicated that AgNP-NCs@ZIF-8 could serve as an attractive candidate for simultaneous detection and removal of Cr(Ⅵ) in environmental monitoring and protection.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2022
·Vol. 8
·期 11
·2200577
·
IF 7.633
Nan Xin,Guihua Tang,Yifei Li,Hao Shen,Yinan Nie,Min Zhang,Xin Zhao
Single crystal tin selenide (SnSe) has a recorded high thermoelectric figure of merit (ZT) value of 2.6 at 923 K, but it is easy to form mechanical cracks and difficult to apply in thermoelectric conversion devices. Polycrystalline SnSe has better mechanical properties but inferior ZT values, which needs further optimization for applications. This work aims at enhancing the thermoelectric performance of polycrystalline SnSe through synergistic optimization of sliver (Ag) and aluminum (Al) co-doping with the hydrogen reduction. The effects of Ag and Al doping on electronic transport properties are systematically investigated by density functional theory calculation and experimental measurement. Compared with pristine SnSe, Ag doping can effectively increase the hole concentration to 1.58 × 10 19 cm −3 and improve the conductivity. Results also indicate that using Al dopant may slightly decrease the hole concentration but reduce the thermal excitation temperature, and introduce point defects reducing the lattice thermal conductivity through scattering phonons. In addition, the hydrogen reduction of sample powders before synthesis can effectively remove Sn oxides and reduce lattice thermal conductivity. At last, a state-of-the-art maximum ZT value of 1.69 at 823 K is obtained in Ag 0.01 Al 0.01 Sn 0.98 Se. This study provides a theoretical basis and technical guidance for designing high-performance polycrystalline SnSe.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wenlong Tu,Haodong Li,Bo Li,Jie Cheng,Ping Xu,Wuxiang Zhang,Zengjing Guo,Jing Zhao,Fanghua Li,Yiyan Song,Fu Yang
The increasing complexity of environmental pollution posed a higher requirement for the development of environment-governed functional materials . Herein, to achieve desired synergy and multiple functionalities of eco-friendly nanomaterials , a micelle-mediated metal assembly strategy was proposed to integrate plasmonic Ag nanoparticles into MnO x modified mesoporous silica hosts by metal-modified neutral dodecyl amine surfactant , correspondingly, a multifunctional mesoporous Ag@MnOx/m-SiO 2 (AMSs) nanocomposite was obtained. The characterization results revealed that the introduction of Mn and alteration in the amount of Ag mediated the formation of a special mesostructure and nanometric morphology of the silica host. Bearing a low Ag loading (r.t. of Ag/Mn = 1/2), ultrafine Ag nanoparticles were embedded in the inner core of mesoporous silica nanospheres . While assembly with a higher Ag concentration affected the morphology of the obtained AMSs and resulted in rich Ag nanoparticles on the exterior surface of mesoporous silica. By this strategy, ultrafine Ag nanoparticles and well-dispersed amorphous MnO x species were coupled into the mesoporous silica to reach a special configuration and integrated functionality. The obtained AMSs-3 can effectively inactivate bacteria ( E. coli , S. aureus, and P. aeruginosa ) with a prolonged inhibitory effect, rapidly reduce harmful nitrophenol, as well as photothermally assist water evaporation (evaporation rate of 1.51 kg m −2 h −1 , receiver efficiency of 87%). This work provides versatile environment-governing functional nanomaterials for both highly effective antimicrobial and environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Ge Xiong,Shuling Shen,Shuning Xiao,Cong Cai,Pengfei Zhang,Zhihong Tang,Jing Li,Junhe Yang
Production of H 2 from photocatalytic seawater splitting is a more promising but more difficult way than from pure water due to the high salinity of seawater. Efficient and stable photocatalyst is crucial and desired. In this work, well-defined Z-scheme Na 2 Ti 3 O 7 /Ag/CdS (N 10 A 1 C 5 ) multidimensional heterojunctions composed of zero-dimensional Ag nanoclusters , one-dimensional Na 2 Ti 3 O 7 (NTO) nanotubes , and two-dimensional CdS nanoplates were constructed. Zero-dimensional Ag nanoclusters decorated on the surface of NTO nanotubes not only act as electron mediator for the formation of Z-scheme between NTO and CdS, but also provide hot electrons due to their plasma effect. CdS nanoplates cooperated with Ag nanoclusters act as visible light absorber, which improve both the visible light absorption range and intensity. With Na 2 S·9H 2 O (0.25 M) and Na 2 SO 3 (0.35 M) as the sacrificial agent , the resultant Z-scheme N 10 A 1 C 5 heterojunctions show a H 2 production of 1793 μmol/(g·h) from visible-light-driven photocatalytic seawater splitting, which is 9.7 times that of NTO/CdS type II heterojunctions. Notably, the Z-scheme N 10 A 1 C 5 also exhibit stability of structure in the high salinity environment due to the interlayer structure of NTO, which can accommodate metal cations in seawater. After four 3-h cycles, the catalytic activity can still maintain 96.6%. This Z-scheme heterojunction is expected to provide a strategy for the design of efficient and stable photocatalysts for the solar energy driven seawater splitting.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Chen Li,Tianyi Sun,Guohui Yi,Dashuai Zhang,Yan Zhang,Xiaoxue Lin,Jinrui Liu,Zaifeng Shi,Qiang Lin
A highly efficient visible light-driven photocatalytic membrane composed of Ag/CNQDs/g-C 3 N 4 and PVDF membranes was successfully prepared by vacuum filter crosslinking. This new type of photocatalytic membrane possessed both excellent photocatalytic degradation performance and photocatalytic self-cleaning properties. The Ag/CNQDs/g-C 3 N 4 photocatalyst coating amount of 10 mg had the highest photocatalytic degradation of norfloxacin (NOR), and the quasi-first-order kinetic constant ( k ) value was 0.0138 min −1 . Moreover, the mechanism of the photocatalytic reaction was also discussed. In addition, bovine serum albumin (BSA) as the simulated pollutant was applied to evaluate the self-cleaning property of the Ag/CNQDs/g-C 3 N 4 -PVDF composite membrane. After contamination with BSA, the water flux of the composite membrane decreased from 3880 L (m 2 h) −1 to 800 L (m 2 h) −1 . Then, the maximum pure water flux of the Ag/CNQDs/g-C 3 N 4 -PVDF photocatalytic composite membrane recovered 87% (3360 L (m 2 h) −1 ) within 90 min of visible light irradiation, indicating that the Ag/CNQDs/g-C 3 N 4 -PVDF photocatalytic composite membrane had excellent self-cleaning properties.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Jian Zhu,Li-na Meng,Xin Li,Guo-jun Weng,Jian-jun Li,Jun-wu Zhao
In this paper, the fluorescence quenching characteristics of Au-Ag-Pt core–shell nanorods have been studied. Due to nonradiative energy transformation, the fluorescence emission intensity of bovine serum albumin (BSA) could be greatly quenched. It has been found that the quenching effect of Au-Ag-Pt core–shell nanorods could be optimized by adjusting the concentration of chloroplatinic acid. Based on the fluorescence quenching properties of Au-Ag-Pt core–shell nanorods, Au-Ag-Pt trimetal fluorescence quenching nanoprobe has been prepared, and the specificity of alpha-fetoprotein (AFP) detection has also been realized. In order to guarantee the sensing specificity, the surface modification including carboxyl replacement, carboxyl activation and antibody connection have been performed on Au-Ag-Pt core–shell nanorods. By using the principle of specific combination of antigen and antibody, the specific detection of AFP has been realized with a lower detection limit of 4.0 pg/mL, and the linear detection range spans a scope from 0.03 to 0.5 ng/mL. Interference experiments and the actual samples detection results show that the Au-Ag-Pt trimetal core–shell nanorod probes have good anti-interference and repeatability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Yong Xue,Jing Shao,Guoqi Sui,Yuqin Ma,Hongji Li
In this paper, a novel SERS imprinted composite material was successfully synthesized with the aid of surface enhanced Raman scattering technology and molecular imprinting technology, which could be suitable for specific detection of organic dyes in the river. The UIO-66(NH 2 ) was wrapped with a thin layer of polydopamine (PDA), after loading Ag nanoparticles on rough surface, Ag@UIO-66(NH 2 )/PDA was synthesized and applied as the SERS substrate. In order to promote the ability of selective detection property in the practical sample, the molecularly imprinted polymer (Ag@UIO-66(NH 2 )/PDA-MIPs) was proposed. When the concentrations range changed between 10 −8 mol/L and 10 −10 mol/L, the intensity of characteristic peak at 1596 cm −1 exhibited a linear relationship with OII concentrations increasing. The limit of detection was low than 10 −10 mol/L, the correlation coefficient was 0.9985. The prepared SERS substrate could be available to the practical sample detection, which expanded SERS detection fields.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2021
·Vol. 13
·期 45
·5523-5531
·
IF 2.896
Sijie Cheng,Junqiu Zhang,Yaoming Liu,Yingte Wang,Yanteng Xiao,Yong Zhang
Herein, bright blue-green fluorescent nitrogen and boron co-doped carbon dots (N, B-CDs) with a quantum yield (QY) up to 33.04% were synthesized viahydrothermal treatment from ammonium citrate tribasic and 3-aminophenylboronic acid. The synthesized N, B-CDs showed outstanding water solubility. According to the principle of the static quenching effect (SQE), the synthesized N, B-CDs were utilized as an efficient sensor for sensing Ag+. The linear range and limit of detection (LOD) of the sensor for Ag+ are 0.99–26.04 μM and 9.03 nM (3σ/m). The proposed method was successfully adopted to detect Ag+ in environmental water, which is of great significance to environmental detection. Furthermore, due to the excellent fluorescence performance, the N, B-CDs were found to be an effective tool for biological imaging and as a fluorescent ink, which widens the horizons for the multifunctional applications of N, B-CDs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2021
·Vol. 11
·期 10
·2102682
·
IF 9.933
Dongxu Ma,Baiqi Chen,Yuanfang Li,Xueyuan Pang,Quanying Fu,Zihan Xiao,Zhonghong Shi,Xiaolei Li,Chongdai Luo,Zhang-kai Zhou,Yin Chen,Jianhua Zhou
The development of easy-to-use, low-cost, and visualized detection platforms for screening human dental caries and periodontal diseases is in urgent demand. In this work, a Au@Ag nanorods-poly(dimethylsiloxane) (Au@Ag NRs-PDMS) wearable mouthguard, which can visualize the tooth lesion sites through the color change of it at the corresponding locations, is presented. The Au@Ag NRs-PDMS composite exhibits a distinct color response to hydrogen sulfide (H 2 S) gas generated by bacterial decay at the lesion sites. Moreover, the Au@Ag NRs-PDMS mouthguard is demonstrated to own desired mechanical properties, excellent chemical stability, as well as good biocompatibility, and can accurately locate the lesion sites in human oral cavity. These findings suggest that the mouthguard has the potential to be utilized on a large scale to help people self-monitor their oral health in daily life, and treat oral diseases locally.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Ling Zhang,Shichao Han,Yingjuan Wu,Yiquan Xie,Liang Wang,Xiangju Meng,Feng-Shou Xiao
Removal of formaldehyde (HCHO) has recently been attracted much attention, and completely catalytic oxidation at room temperature has been identified as one of the efficient routes for solving this problem. In this research, we show a successful preparation of Ag-loaded octahedral molecular sieve from solvent-free route (Ag/OMS-2-S), which was characterized by XRD, SEM, HRTEM, BET, XPS, ICP-OES, H 2 -TPR, and HCHO-TPD techniques to investigate the factors influencing the catalytic activity. Very interestingly, HCHO is completely converted into CO 2 at room temperature over the Ag/OMS-2-S catalyst. To the best of our knowledge, this is the first time for complete oxidation of HCHO at room temperature over all the Ag-based catalysts. Relating to the characterizations, it is suggested that the active oxygen species play a key factor that contributes to the excellent performance of the Ag/OMS-2-S. In addition, the Ag/OMS-2-S catalyst is also very stable and selective. Combination of extraordinary activity and excellent stability of the Ag/OMS-2-S catalysts might offer an alternative way to develop new efficient catalysts for the removal of air pollutants.
✓ 已验证
产品关联
DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2021
·Vol. 38
·期 12
·2100160
·
IF 3.31
Zilun Tang,Jianyu Wu,Xiaochun Liu,Qiuping Su,Xingshan Yin,Zhiyi Huang,Xiaofeng Lin,Wenjing Lin,Guobin Yi
The fabrication of flexible surface-enhanced Raman scattering (SERS) substrates for sensitive detection on uneven or irregular surfaces is challenging. In this study, a flexible dual plasmonic SERS (FDPS) substrate rationally constructed using Au nanoparticle (AuNP) arrays/aligned Ag nanowires (AgNWs) and elastic polyurethane (PU) is demonstrated. It exhibits high sensitivity (detection limit of 10 −8 m for melamine and 10 −10 m for malachite green) and excellent reproducibility. The well-designed structure of AuNP arrays/aligned AgNWs fabricated using block copolymer self-assembly and oil–water–air interfacial self-assembly successfully enhances the electromagnetic field through plasmonic coupling. In addition, the FDPS substrate retains a high SERS sensitivity after exposure to air at room temperature for 30 days because of the high stability of AuNP arrays and antioxidation characteristic of the PU covered on the aligned AgNWs. Even after undergoing stretching, bending, and twisting for 100 cycles, the FDPS substrate maintains a stable SERS activity owing to the introduction of the elastic PU. This study demonstrates a potential application of SERS detection under practical conditions for irregular surfaces and may be helpful in the development of flexible sensors.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Chen Chen,Ximo Wang,Geoffrey I.N. Waterhouse,Xuguang Qiao,Zhixiang Xu
A highly sensitive molecularly imprinted surface-enhanced Raman scattering (SERS) sensor was developed for selective detection of histamine. A combination of two semiconductors and Ag nanoparticles (NPs) was used as the SERS substrate. The SERS was induced by Ag NPs plasmon resonances as well as charge-transfer between the semiconductors and the Ag NPs. The Raman intensity and the logarithm of the histamine concentration were linear over the range 10 −8 –10 −3 mol L −1 . The sensor exhibited good selectivity and had a sensitivity limit of 3.088 × 10 −9 mol L −1 . Histamine was detected in a spiked liquor sample, and its recoveries were in the range of 89.89%–109.18%.
✓ 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）