ACS Applied Energy Materials
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2023
·
IF 6.4
Hao Li,Shenyue Gao,Hang Ding,Yuetong Tao,Shenghua Ma,Gang Wang,Beibei Wang
Interfacial solar steam generation is considered the next-generation desalination and sewage treatment technology. However, realizing solar evaporators with broad-spectrum absorption, efficient thermal conversion, and high stability remains a challenge. The high light-trapping surface structure and fast water transport channels of the evaporator improve the evaporation efficiency, and solar evaporators have great potential in the field of solar steam generation. Herein, the mixture of transition-metal carbide (Ti3C2Tx) and core–shell Ag–SiO2 nanoparticles (Ag@SiO2 NPs) is fabricated as a three-dimensional (3D) vertical porous Ti3C2Tx/Ag@SiO2 gel evaporator via ice templating technology. The synergistic interaction between dual Ti3C2Tx–Ag plasma materials confined in a cross-linked microcapillary structure realizes 97.6% wide absorption in the wavelength range of 250–2500 nm. The SiO2 coating on the surface of Ag NPs can inhibit the oxidation of Ag NPs and conduct heat collection management. The 3D vertically cross-linked porous structure promotes efficient water transport and improves the mechanical strength of the evaporator. The Ti3C2Tx/Ag@SiO2 gel evaporator exhibits a high evaporation rate of 1.42 kg m–2 h–1 and a photothermal conversion efficiency of 98% under 1 sun illumination. The Ti3C2Tx/Ag@SiO2 gel evaporator shows great application prospects in seawater desalination and sewage purification.
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高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 10
·期 1
·265-273
·
IF 7.393
Xu Liu,Xiao-Rong Sun,Chen Luo,Hong-Zhi Ma,Hua Yu,Yan Shao,Ming-Bo Yang,Bo Yin
The development of self-powered technology in nano-energy puts forward higher requirements for triboelectric nanogenerators (TENGs), in which it is necessary to further improve their output performance to broaden their scope of application, and environmentally friendly and sustainable development needs to be realized as well by the recycling of friction materials. The preparation of environmentally friendly and sustainable TENGs is reported in this work through a feasible and cost-effective solution casting method, in which polyethylene oxide (PEO) and Ecoflex were utilized as positive/negative friction materials, respectively. With introducing micron-sized core–shell Ag@SiO2 particles into the PEO matrix, micro–nano structures were constructed to increase the effective contact area, while the enhancement of dielectric properties was also achieved in the meantime. The Ag@SiO2–PEO/Ecoflex TENG with optimum particle content of 50 wt% produced a short-circuit current of 10 μA, an open-circuit voltage of 95 V, and a transfer charges of 35 nC at a frequency of 3 Hz. The maximum output power density of Ag@SiO2–PEO-50 wt%/Ecoflex TENG up to 1.5 W m−2 was reached under different load resistances. The stability and flexibility of TENGs were verified as well, which led to a novel approach for their application in wearable-flexible electronic devices. Additionally, the sustainable utilization of TENGs was achieved as a result of the water solubility of the PEO material, with significant output performance retention. This work provides an innovative approach for the further modification of the output performance of flexible and sustainable TENGs.
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Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 48
·9961-9970
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IF 6.331
Shuhan Hui,Qiqi Liu,Yandong Han,Lijuan Zhang,Jun Yang,Shan Jiang,Haisheng Qian,Wensheng Yang
Bacterial infection has increasingly affected people's lives, therefore it is significant to explore novel antibacterial agents and strategies for efficient disinfection. Herein, we designed ZIF-8 based composites ICG@ZIF-8/PDA/Ag, which encapsulate photothermal agent indocyanine green (ICG) and grow polydopamine (PDA) on their surface for in situ reduction to generate Ag nanoparticles. With 20 min of 808 nm laser irradiation at 1.5 W cm−2, 100 μg mL−1 ICG@ZIF-8/PDA/Ag exhibited 100% bactericidal effects toward E. coli and S. aureus bacteria resulting from both hyperthermia of ICG and PDA and chemical toxicity of the released Ag and Zn ions. When the bacterial incubation period was extended to 12 h, the minimum bactericidal concentration (MBC) of ICG@ZIF-8/PDA/Ag was reduced to 6.25 μg mL−1, and this extremely low MBC was due to the long-term chemo-photothermal combinational effect induced by NIR irradiation. Additionally, the composites successfully promote the healing of S. aureus infected wounds on mice. This work constructed photo-responsive antibacterial composites that realize chemo-photothermal synergistic therapy.
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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.
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PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2021
·Vol. 38
·期 12
·2100160
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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.
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Analytical Methods
·
2021
·Vol. 13
·期 45
·5523-5531
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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.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Xiang-Hua Ling,Yue-Feng Tang,Guo-Zhi Han
The composite of hydrogels and noble metal nanoparticles has wide applications in the field of functional materials . In this paper, we developed a novel and green strategy to synthesize a kind of composite hydrogel microspheres containing silver nanoparticles and β-cyclodextrin (β-CD) modified sodium alginate (β-CD@SA@Ag) without use of strong reducing reagent. First, β-CD was chemical linked to SA by epichlorohydrin (ECH) to form the β-CD modified polymer (β-CD@SA). then AgNO 3 was added to the as-prepared polymer solution , in which silver nanoparticles were formed by the reducing power of β-CD units. Subsequently, by reversed-phase emulsion method and ionic cross-linking, a kind of β-CD@SA@Ag hydrogel microspheres were obtained. The structure and morphology of the composite material were characterized in detail by Fourier infrared spectroscopy (FT-IR), thermogravimetric analysis (TG), scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD). Test data indicated that silver nanoparticles evenly dispersed in the composite material. On the basis, the adsorption and catalytic performances of the β-CD@SA@Ag hydrogel microspheres were studied towards to the reduction of aromatic nitro compounds. Research results showed that the β-CD@SA@Ag hydrogel microspheres had excellent catalytic activity along with high environmental adaptability. whether in pure water, tap water or river water, aromatic nitro compounds can be completely reduced within 2–13 min. Moreover, the morphology of microspheres of the composite material endows the composite material with high stability and reusability. We believe that our work would provide a new idea for the green synthesis of organic-inorganic composite functional materials .
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Science Bulletin
·
2016
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IF 0
Lidan Xu,Min Hong,Yongliang Wang,Ming Li,Haibo Li,Madhavan P.N. Nair,Chen-Zhong Li
In this work, we demonstrated a simple and efficacious two-step method for the synthesis of Ag@Au core–shell nanoparticles (Ag@AuNPs) and the Ag/Au hollow nanocages (Ag/AuNCs) with Ag nanoparticles (AgNPs) as seeds by adjusting pH, and the preparation of hybrid Ag@AuNPs- or Ag/AuNCs-graphene oxide nanocomposites (Ag@AuNPs-GO or Ag/AuNCs-GO) based on the self-assembly. It was noticed from the electrostatic assembly experiment that the loading amount of Ag/AuNCs on GO nanosheet was more than that of Ag@AuNPs. The as-synthesized hybrid materials were characterized by transmission electron microscopy , atomic force microscopy , ζ-potential, high-angle annular dark-field scanning transmission electron microscopy, thermogravimetric analyzer and X-ray diffraction. Catalytic activities of Ag@AuNPs, Ag/AuNCs and Ag/AuNCs-GO nanostructures were investigated in the reduction of 4-, 3- or 2-nitrophenol to 4-, 3- or 2-aminophenol, and on the basis of comparative kinetic studies the following trend was obtained for the related catalytic activity: Ag/AuNCs-GO > Ag/AuNCs > Ag@AuNPs. These observations were attributed to the simultaneous effects of surface area available for catalytic reaction and composition of the hybrid nanostructures.
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RSC Advances
·
2022
·Vol. 12
·期 8
·4836-4842
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IF 4.036
Yingxin Chen,Chunli Yang,Xiaotong Huang,Lu Li,Na Yu,Huan Xie,Zebin Zhu,Yong Yuan,Lihua Zhou
A composite of cuttlefish ink-based carbon quantum dots@Ag/MXene (CQD@Ag/MXene) was firstly synthesized by solvothermal method as a catalyst for reduction of p-nitrophenol (PNP) to p-aminophenol (PAP). CQD@Ag/MXene was characterized by scanning electron microscopy (SEM), field emission transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman. The results show that loading on 2D material MXene can prevent the aggregation of CQD@Ag and expose more active sites, which contributes to a superior catalytic activity with a pseudo-first-order rate constant k (2.28 × 10−2 s−1) and mass-normalized rate constant km (5700 s−1 g−1), nearly 2 times higher than CQD@Ag without MXene (k = 1.09 × 10−2 s−1 and km = 2725 s−1 g−1). Besides, CQD@Ag/MXene showed excellent reusability which even retained about 65% activity in successive 10 cycles. The high adsorption rate to PNP and the promotion of forming H radicals may be the reason for the outstanding catalytic activity of CQD@Ag/MXene. CQD@Ag/MXene can be a potential candidate in the removal of environmental pollutants due to its facile synthesis and high catalytic efficiency.
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高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2022
·Vol. 2022
·期 21
·e202200176
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IF 2.551
Guanyu Ma,Yun Tang,Leyi Chen,Lubing Qin,Quanli Shen,Likai Wang,Zhenghua Tang
Graphical We report a novel homoleptic alkynyl-protected Au(I)9-Ag(I)9 cluster, which features an intriguing ichthyomorphic assembled core structure. It shows distinct absorbance feature and luminescence properties in solution and in the solid state. Interestingly, it has excellent catalytic performance in both the hydrogen evolution reaction and the reduction of 4-nitrophenol. We report the structure analysis, optical property, and catalytic implications of homoleptic alkynyl-protected Au(I)-Ag(I) nanocluster, namely Au 9 Ag 9 (C≡CAr F ) 18 (abbreviated as Au9 Ag9 hereafter). Single crystal X-ray diffraction analysis disclosed that, the core of Au 9 Ag 9 cluster features intriguing ichthyomorphic assembled structure driven by metallophilic interactions and Au-acetylide linkages. The Au 9 Ag 9 nanocluster is fluorescent in both solution and solid state, and it has much higher quantum yield in solid state. In the electrochemical hydrogen evolution reaction (HER) test, Au 9 Ag 9 nanocluster exhibits a favorable overpotential of 274 mV at 10 mA cm −2 with a Tafel slope of 99 mV dec −1 , which markedly surpass than the [Au(C≡C-Ar F )] f and [Ag(C≡C-Ar F )] f control samples. Furthermore, Au 9 Ag 9 nanocluster shows much higher activity than the other two to catalyze the reduction of 4-nitrophenol.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 14
·2394
·
IF 5.719
Xingang Chen,Lei Zhu,Zhipeng Ma,Meilin Wang,Rui Zhao,Yueyue Zou,Yijie Fan
Industrial wastewater containing large amounts of organic pollutants is a severe threat to the environment and human health. Thus, the rapid detection and removal of these pollutants from wastewater are essential to protect public health and the ecological environment. In this study, a multifunctional and reusable surface-enhanced Raman scattering (SERS) substrate by growing Ag nanoparticles (NPs) on ZnO nanorods (NRs) was produced for detecting and degrading Rhodamine B (RhB) dye. The ZnO/Ag substrate exhibited excellent sensitivity, and the limit of detection (LOD) for RhB was as low as 10−11M. Furthermore, the SERS substrate could efficiently degrade RhB, with a degradation efficiency of nearly 100% within 150 min. Moreover, it retained good SERS activity after multiple repeated uses. The interaction between Ag NPs, ZnO, and RhB was further investigated, and the mechanism of SERS and photocatalysis was proposed. The as-prepared ZnO/Ag composite structure could be highly applicable as a multifunctional SERS substrate for the rapid detection and photocatalytic degradation of trace amounts of organic pollutants in water.Keywords:SERS;organic pollutants;ZnO/Ag;sensitivity;photocatalytic
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Xin Xu,Jinhui Cai,Penghua Guo,Zhilin Zhou,Junya Cui,Yaqiang Ji,Jin-Qi Xie
A vertically aligned metal array based TIM was fabricated by electroless deposition on polyamide fibers. • The metal coated polyamide fibers exhibit excellent flexibility and resistance to oxidation. • The TIM demonstrate high thermal conductivity of 69.3 W/m·K, low Young's modulus of 32.5 MPa and excellent compliance. Constructing continuous high-thermal-conductivity channels that penetrate through the polymer matrix is one of the key approaches to achieving next-generation high-performance composite thermal interface materials (TIMs). Currently, the only reported metal copper microarray-based TIMs fabricated via porous sacrificial templating are costly and cumbersome. In this work, a novel and facile route is developed for constructing flexible, metallic array TIMs based on electroless plating of polyamide fiber arrays. The resulting Cu Ag bimetallic-coated (PA@Cu@Ag) fiber structures provide high-thermal-conductivity and performance-stable flexible channels for high-performance TIMs. The composite TIM, with the PA@Cu@Ag fiber array serving as the skeleton, exhibits a thermal conductivity as high as 69.3 W/m·K and a Young's modulus as low as 32.5 MPa. Its performance remains stable even after 1000 compression cycles and LED device on/off cycling. When assembled in LED devices, it significantly reduces the steady-state operating temperature to 58.0 °C, far outperforming conventional particle-filled composite materials. Download: Download high-res image (70KB) Download: Download full-size image
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