Advanced Materials Interfaces
·
2018
·Vol. 5
·期 10
·1701574
·
IF 4.834
Peng Guan,Hongye Bai,Chunfa Li,Yilin Ge,Dongbo Xu,Biyi Chen,Teng Xia,Weiqiang Fan,Weidong Shi
Overcoming one of most challenging limitations of bare TiO 2 with large bandgap can be achieved by rational design and fabrication of heterostructures. Multicomponent sulfides with a nature of tunable band structure can be a good alternative to decorating TiO 2 , but there remains a major trade-off between the high efficiency and the long-term durability, so the stability issue must be addressed upon the use of sulfides. Here, an effective strategy is demonstrated with Bi-doped AgIn 5 S 8 (Bi-AgIn 5 S 8 ) decorated TiO 2 photoanode, where twofold enhancement of the photocurrent is achieved. More importantly, it is the first time to integrate polydopamine passivation layer and AgIn 5 S 8 for simultaneously enhancing the solar conversion efficiency and stability. The incident photon-to-current conversion efficiency value is tuned up to 45% (0.4 V vs Ag/AgCl), and the photocurrent density can keep for 90.8% after 5 h. Corresponding hydrogen evolution rate has increased to 8.6 µmol h −1 , which is three times higher than that of bare TiO 2 .
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JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2018
·Vol. 48
·期 10
·1121-1129
·
IF 2.262
Zhu Chun-Rong,Long Jun-Fei,Tang Qian,Gong Cheng-Bin,Fu Xiang-Kai
Abstract This paper aims to develop a multi-colored electrochromic device based on mixed mono- and bi-substituted 4,4′-bipyridine derivatives containing an ester group. A series of these derivatives were synthesized, and their electrochemical and electrochromic properties were studied through cyclic voltammetry and ultraviolet–visible spectroscopy. The mono- and bi-substituted 4,4′-bipyridine derivatives containing an ester group displayed different onset bias and colored state. Mono-substituted 4,4′-bipyridine derivatives showed a magenta colored state at an onset bias of − 1.3 V; bi-substituted 4,4′-bipyridine derivatives showed violet colored states at an onset bias of − 0.8 V. A multi-colored electrochromic device was achieved by mixing mono- and bi-substituted 4,4′-bipyridine derivatives as the electrochromic layer. Graphical Abstract
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Hui Wang,Sudong Yang,Peng-Cheng Ma
Seeking of novel materials with special wettability is highly demanded for efficient separation of emulsified mixtures. In this study, carbonized melamine foam modified with cobalt hydroxide nanosheets was fabricated by a two-step route consisting of thermal pyrolysis and controlled chemical precipitation . The developed material exhibited a superamphiphilicity in air, and a controlled superoleophobic or superhydrophobic performance in various liquid conditions. By utilizing these properties, the composite foam was used as a bi-functional material to separate various oil-water emulsions. The results demonstrated that the developed material, solely using gravity without external stimulus, had the capability to separate not only the surfactant-stabilized oil-in-water emulsions with a high separation flux, but also the water-in-oil ones with remarkable oil purity. The facile method for the material preparation, high separation merit and excellent anti-fouling property of material provided a new candidate for the separation of emulsion systems.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Jiamei Xiao,Zhuoting Yu,Yuan Tian,Mingze Zeng,Borui Su,Jie Ding,Chengheng Wu,Dan Wei,Jing Sun,Hongsong Fan
Nerve conduit is an alternative strategy in peripheral nerve injuries (PNI) treatment both for neural signals recording and therapeutic electrical stimulation (ES). Most conventional conduits suffer from surgical suturing and lacking real-time insights of nerve recovery, as well as failing in integrating therapy strategies. Herein, we introduce a bi-layered hydrogel conduit with microneedles (BHCM), in which poly (N-isopropylacrylamide) (PNIPAm)-incorporated polyethyleneimine (PEI) forms the outer layer for conductivity and electro-driven drug loading and release, whereas PNIPAm/alginate/tannic acid hydrogel (PNIPAm/SA/TA) forms the inner layer to ensure biocompatible mechanics and strong tissue adhesion. Meanwhile, the differences in doping manipulated different critical solution temperature (LCST) and swelling between the double layers determine the self-curling performance. Therefore, the BHCM responds to temperature and self-curls into conduit to wrap and bind to sciatic nerve, avoiding the complicated suturing and enhancing the interfacial electrical transmission. By puncturing the epineurium, the microneedles strongly enhance the electrochemical performance, and synergistically facilitate controllable drug delivery as well as electrical stimulation and recording efficiency. Further, BHCM is demonstrated to regulate macrophage polarization from M1 to M2 through electrically stimulated Rhein release, thereby reducing inflammation and facilitating diabetic PNI repair. The present design aims to improve biosafety, surgical simplicity to realize overall recovery of injured nerves, making it a promising candidate for advanced peripheral nerve repair strategies.
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Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 27
·10096-10103
·
IF 5.7
Shaohua Li,Yi Zhang,Zihan Song,Zida Zheng,Xiaowei Zhang,Xueyun Liu
Luminescent solar concentrators (LSCs) serving as potential energy-conversion units have received great attention in building-integrated photovoltaics (BIPVs). However, the main challenge for BIPV-used LSCs is to maintain a high transparency while improving its photo-electric performance. In this work, we fabricate a flexible LSC by incorporating Bi-doped Cs2Na0.6Ag0.4InCl6 double perovskite (DP) QDs into polydimethylsiloxane (PDMS). The as-synthesized QDs show a large Stokes shift and broadband orange emission originating from the recombination between the localized states of [BiCl6] and [AgCl6] octahedra. The resultant LSC based on the above QDs exhibits a high internal quantum efficiency of up to 34.42%, which is relatively higher than that of other reported QD-based LSCs. More attractively, the average visible transmittance of the LSC remains 91.55%. By attaching a Si PV cell along the edge of the LSC, the optimal power conversion efficiency (PCE) and optical efficiency (ηopt) of the LSCs of 2.56% and 2.57%, respectively, can be reached under the irradiation of a solar simulator. In addition, the LSC presents good photostability after 80 h of xenon lamp irradiation. Therefore, we anticipate that the lead-free DP QD-based LSCs may provide a promising direction for high-efficiency transparent LSCs.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 3
·1872
·
IF 4.9
Jian Feng,Li Wang,Bo Xiao,Xia Ran,Caiying Wang,Jinming Zhu,Zuoji Liu,Chaozhong Li,Xinai Cui,Rong Li,Guangwei Feng,Zeqin Dai
Photocatalytic technology has been recently conducted to remove microbial contamination due to its unique features of nontoxic by-products, low cost, negligible microbial resistance and broad-spectrum elimination capacity. Herein, a novel two dimensional (2D) g-C3N4/Bi(OH)3(CNB) heterojunction was fabricated byincorporating Bi(OH)3(BOH) nanoparticles with g-C3N4(CN) nanosheets. This CNB heterojunction exhibited high photocatalytic antibacterial efficiency (99.3%) againstEscherichia coli(E. coli) under visible light irradiation, which was 4.3 and 3.4 times that of BOH (23.0%) and CN (28.0%), respectively. The increase in specific surface area, ultra-thin layered structure, construction of a heterojunction and enhancement of visible light absorption were conducive to facilitating the separation and transfer of photoinduced charge carriers. Live/dead cell staining, sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) assays and scanning electron microscopy (SEM) have been implemented to investigate the damage to the cell membrane and the leakage of the intracellular protein in the photocatalytic antibacterial process. The e−, h+and O2•−were the active species involved in this process. This study proposed an appropriate photocatalyst for efficient treatment of bacterial contamination.
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PubMed
高影响因子
MOLECULES
·
2017
·Vol. 22
·期 7
·1068
·
IF 2.861
Yalu Dong,Panpan Peng,Baoping Hu,Hui Su,Shenghua Li,Siping Pang
High-energy metal–organic frameworks (MOFs) based on nitrogen-rich ligands are an emerging class of explosives, and density is one of the positive factors that can influence the performance of energetic materials. Thus, it is important to design and synthesize high-density energetic MOFs. In the present work, hydrothermal reactions of Cu(II) with the rigid polynitro heterocyclic ligands 5,5′-dinitro-2H,2′H-3,3′-bi-1,2,4-triazole (DNBT) and 5,5′-dinitro-3,3′-bis-1,2,4-triazole-1-diol (DNBTO) gave two high-density MOFs: [Cu(DNBT)(ATRZ)3]n(1) and [Cu(DNBTO)(ATRZ)2(H2O)2]n(2), where ATRZ represents 4,4′-azo-1,2,4-triazole. The structures were characterized by infrared spectroscopy, elemental analysis, ultraviolet-visible (UV) absorption spectroscopy and single-crystal X-ray diffraction. Their thermal stabilities were also determined by thermogravimetric/differential scanning calorimetry analysis (TG/DSC). The results revealed that complex1has a two-dimensional porous framework that possesses the most stable chair conformations (like cyclohexane), whereas complex2has a one-dimensional polymeric structure. Compared with previously reported MOFs based on copper ions, the complexes have higher density (ρ = 1.93 g cm−3for complex1and ρ = 1.96 g cm−3for complex2) and high thermal stability (decomposition temperatures of 323 °C for complex1and 333.3 °C for complex2), especially because of the introduction of an N–O bond in complex2. We anticipate that these two complexes would be potential high-energy density materials.Keywords:energetic materials;metal organic frameworks;densities;polynitro heterocyclic ligands
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 12
·F1110
·
IF 3.259
Shumin Wang,Yong Qin,Yang Liu,Fuqiang Chu,Yong Kong,Yongxin Tao
Co,N,S-codoped three-dimensional graphene (Co,N,S/3DG) has been fabricated using Co(SCN)2 as the precursor. It has been found that Co,N,S/3DG is a highly efficient bi-functional electrocatalyst for oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER). It exhibits the high catalytic activity comparable to the Pt/C catalyst toward ORR, and the low overpotential of 260 mV to afford the current density of 10 mA cm−2 toward HER. The doping of S can promote the electrocatalytic performance of Co,N-codoped graphene due most likely to the defects induced by sulfur atom. The results provide new clues to design multi-functional electrocatalyst in energy storage and conversion.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Li-Feng Zhu,Bo-Ping Zhang,Shun Li,Gao-Lei Zhao
The (1- x )Bi 1+ y (Fe 0.96 Mg 0.02 Ti 0.02 )O 3 - x BaTiO 3 (abbreviated as B 1+ y FMT- x BT) system was designed to explore the morphotropic phase boundary (MPB) separating rhombohedral ( R ) and tetragonal ( T ) phases, and the mechanism of performance enhancement. The phase structure of samples was discreetly investigated by X-ray diffraction, and Rietveld refinement results of the XRD data revealed that the B 1+ y FMT- x BT ceramics consist of an R phase at x = 0.24, two R and T phases at 0.26 ≤ x ≤ 0.32, and a single T phase at x = 0.34. Because of the MPB and the improvement of resistivity with adding excess Bi compensation, excellent piezoelectric properties of d 33 = 198 pC/N and k p = 30.9%, as well as high Curie temperature T C = 497 °C were achieved in the B 1+ y FMT- x BT system at x = 0.30 and y = 0.02. Here, the large d 33 = 198 pC/N which is the maximum value for the BF-BT-Bi(Mg,Ti)O 3 system so far, and high T C = 497 °C suggest that Bi(Fe,Mg,Ti)O 3 -BaTiO 3 ceramics have good prospects in high-temperature piezoelectric devices.
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RSC Advances
·
2014
·Vol. 4
·期 84
·44575-44582
·
IF 3.708
Peng Jing,Qin Wang,Baocang Liu,Guangran Xu,Yanbing Zhang,Jun Zhang,Gejihu De
We develop a facile layer-by-layer deposition process to create bi-functional Fe3O4@SiO2@Gd2O3:Yb,Er nanostructures composed of magnetic Fe3O4 cores, variable SiO2 mid-layers, and up-converting Gd2O3 shells. The synthetic process is well-controlled and the obtained Fe3O4@SiO2@Gd2O3:Yb,Er nanoparticles show relative monodispersity and exhibit tunable magnetic and up-conversion luminescence depending on the thickness of SiO2 mid-layers. The influences of SiO2 mid-buffer-layers on morphology, magnetism, and up-conversion luminescence are well addressed. The obtained bi-functional Fe3O4@SiO2@Gd2O3:Yb,Er nanoparticles may be potentially applicable in magnetic, fluorescent, and biological applications. The synthetic route may be employed for fabricating other multifunctional nanostructures.
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GREEN CHEMISTRY
·
2015
·Vol. 18
·期 6
·1798-1806
·
IF 8.02
Yong-Qi Li,Peng Wang,Huan Liu,Yong Lu,Xiao-Li Zhao,Ye Liu
A novel ionic bi-functional ligand of L2 containing a phosphine and a Lewis acidic phosphonium with I− as the counter-anion was prepared and fully characterized. The molecular structure indicated that the bi-functionalities in L2 were well retained without the incompatibility problem for quenching of the acidity of the phosphonium cation by the Lewis basic phosphine fragment or the anionic I− when the incorporated phosphine fragment and the Lewis acidic phosphonium were strictly located in the confined cis-positions. The co-catalysis over L2–Rh(acac)(CO)2 in the ways of synergetic catalysis and sequential catalysis was successfully fulfilled for one-pot hydroformylation–acetalization, which proved not to be the result of the simple mixture of the mono-phosphine (L4) and the phosphonium salt (L4′). In L2, the phosphonium not only acted as a Lewis acid organocatalyst to drive the sequential acetalization of aldehydes, but also contributed to the synergetic catalysis for the preceding hydroformylation through stabilizing the Rh-acyl intermediate with the phosphine cooperatively. The L2-Rh(acac)(CO)2 system is also generally applied to hydroformylation–acetalization of a wide range of olefins in different alcohols. Advantageously, as an ionic phosphonium-based ligand, L2 could be recycled for 7 runs with Rh(acac)(CO)2 together in RTIL of [Bmim]BF4 without obvious activity loss or metal leaching.
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TENSIDE SURFACTANTS DETERGENTS
·
2017
·Vol. 54
·期 2
·165-170
·
IF 0.869
Ruixia Niu,Jingling Wang,Wenyi Wang,Biao Long,Hua Song,Chao Wang,Daqiang Wang,Lingzhi Liao
Series of bi-component nonylphenol alkyl sulfonate surfactants (C 12 /C n -NPAS, n = 8, 10, 14, 16) were synthesized through sulfonation-alkylation-neutralization using a mixture of linear alpha olefin (C 12 -olefin and C n -olefin, n = 8, 10, 14, 16), SO 3 and nonylphenol as raw materials. The effect of the raw materials composition on the properties, such as surface tension, interfacial tension, wettability, foam properties of the prepared C 12 /C n -NPAS ( n = 8, 10, 14, 16) surfactants was systematically investigated. The critical micelle concentrations (CMC) of C 12 /C 8 -NPAS, C 12 /C 10 -NPAS, C 12 /C 14 -NPAS and C 12 /C 16 -NPAS are 0.42, 0.26, 0.22 and 0.40 mmol · L −1 , and surface tensions at CMC (γ CMC ) are 34.7, 27.9, 31.8 and 33.3 mN · m −1 , respectively. Compared with SDBS and HABS, the surface properties of the prepared C 12 /C n -NPAS are superior to traditional surfactants. Interfacial tension between Daqing crude oil and weakly alkaline ASP oil flooding system containing 0.1 wt% of C 12 /C 14 -NPAS could reach an ultralow level of 9.78 × 10 −3 mN · m −1 , which is lower than that for C 12 -NPAS and HABS. C 12 /C 10 -NPAS shows better wetting performance and foamability and foam stability than other synthesized surfactants.
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