- 标题
- 摘要
- 关键词
- 实验方案
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Enhanced electrocatalytic properties in MoS2/MoTe2 hybrid heterostructures for dye-sensitized solar cells
摘要： In this work, the hybrid bilayer of molybdenum disulfide (MoS2)/molybdenum telluride (MoTe2) was constructed on fluorine-doped tin oxide glass (FTO), and dye-sensitized solar cells (DSSCs) employing the material as counter electrode (CE) were implemented. The thickness of each layer of MoS2 and MoTe2 was tuned by changing the sputtering time to enhance DSSC performance. The DSSC with the MoS2/MoTe2 hybrid CE, exhibited a maximum power conversion efficiency (PCE) of 8.07% (6% for MoS2 and 7.25% for MoTe2 CE), and was comparable to one with Pt CE (8.33%). The observed good result of the MoS2/MoTe2 hybrid CE is ascribed to the synergistic properties between MoS2 and the metallic phase of MoTe2.
关键词： MoS2/MoTe2,DSSCs,Counter electrode,Hybrids
更新于2025-09-12 10:27:22
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Surface Properties of Structure-Controlled Silica Films Prepared Using Organic-Inorganic Hybrid Solutions
摘要： Silica films with various microstructures were fabricated using organic-inorganic (O-I) hybrid solutions containing a mixture of silica sols, polymethylmethacrylate (PMMA), and urethane acrylate nonionomer (UAN) as an amphiphilic polymer, The O-I hybrid solutions were prepared with various UAN:PMMA and polymer/solvent ratios, then spin-coated on glass and calcinated at 450 °C to produce silica films with various microphase-separated structures. For higher UAN and PMMA concentrations, the silica films showed spherical inorganic domains dispersed over the surface, while many pores were formed in the films with lower polymer contents (observed using scanning electron microscopy). The surface hydrophobicity of the silica films was determined using water contact angle measurements. After surface modification using (1H, 1H, 2H, 2H-perfluorooctyl)trichlorosilane solution, the hydrophobicity of films with a highly microphase-separated structure increased significantly, and all surface-modified films showed increasing hydrophobicity with increasing polymer content. Furthermore, pencil scratch hardness tests showed that the silica films formed on glass substrates could withstand the 5H scratch, test even after surface modification.
关键词： microstructure,microphase-separated structure,hydrophobicity,organic-inorganic hybrids,amphiphilic polymer
更新于2025-09-12 10:27:22
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Photo-Patternable Quantum Dots/Siloxane Composite with Long-Term Stability for Quantum Dot Color-Filters
摘要： Incorporation of quantum dots (QDs) into color-filters (CFs) are desired for less energy loss and wider viewing angle compared to conventional display. However, aggregation and vulnerability to heat, moisture, and chemicals in photo-patternable matrix are critical issues of the QD-CFs with high QDs concentration. Herein, we fabricated red (10 wt%) and green (20 wt%) QD-CFs using photolithography of QD/siloxane ink containing secondary thiol monomer. Ligand exchanged QDs were chemically incorporated in methacrylate oligo-siloxane resin. QD/siloxane composite showed superior stability under harsh heat and moisture (85 ℃/5% RH and 85 ℃/85% RH) conditions and chemicals (EtOH, HCl and NaOH) compared to conventional QD/PR (commercial negative photoresist). 10 μm-thick QD-CFs effectively converted blue light emitted from LED chip into red and green light, and the obtained white PL through QD-CF showed wide color gamut which was 108% relative to NTSC. From these advantages, QD/siloxane composite will be beneficial as color-conversion photoresist to be used as color-filters in LCDs, μLEDs, and OLEDs.
关键词： Sol-gel condensation,Siloxane hybrids,Photo-patternability,Quantum dot color-filter,Thermal and chemical stability
更新于2025-09-12 10:27:22
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Manipulation of 3D nanocarbon hybrids toward synthesis of N-doped graphene quantum dots with high photoluminescence quantum yield
摘要： Synthesis of heteroatom-doped graphene quantum dots (GQDs) via a top-down approach is still challenging. Herein, we conveniently synthesized nitrogen-doped GQDs (N-GQDs) via an electrochemical method. In that, the N-containing 3D nanocarbon hybrids were prepared as the carbon and nitrogen sources, which were cut into small fragments in ammonia solution as the electrolyte. Interestingly, N-atoms from the 3D nanocarbon hybrids were successfully retained or converted into the other type of N in the obtained GQDs, resulting to a highly doped N content up to 12.3% even after excluding the amino- and pyrrolic N at edges of the N-GQDs. As a matter of fact, such synthesized N-GQDs show highly crystallized structure, and demonstrate a high photoluminescence quantum yield of ~19.3%, among the highest values of top-down approach synthesized GQDs. Moreover, it can be also used for adjusting the absorption range of GQDs. Overall, we developed a new strategy to synthesize N-doped GQDs by controlling the carbon source, which opens a new avenue toward achieving other types of heteroatom-doped GQDs.
关键词： electrochemical method,3D nanocarbon hybrids,doping,quantum yield,graphene quantum dots
更新于2025-09-11 14:15:04
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Bioelectrochemical Interface Engineering || Biophotovoltaics
摘要： The expeditious increase in population, the furtherance of people’s lifestyles, and the liability to nurture the needs of growing populations critically demand the exploration of prodigious energy devices with remarkable potentials to meet the current massive energy demand and address great environmental concerns (Angelaalincy et al. 2018). Among the widely established alternative and renewable energy sources, fuel cells have been considered as one of the most significant energy devices, owing to their ability to generate and store energy with high efficiency and at affordable costs with trivial greenhouse emissions (Senthilkumar et al. 2018). Moreover, fuel cells have been in existence for ages and are undergoing rapid evolutionary changes with thriving technological advancements. The history of biofuel cells dates back to the early eighteenth century, and this technology became so captivating then that many researchers started experimenting and publishing results on fuel cells in the following years. However, the actual microbial fuel cell (MFC) employing pure cultures of bacteria was successfully demonstrated in the 1980s by H. Peter Bennetto (Bennetto et al. 1980).
关键词： Electron transfer mechanisms,Microbial solar cells,Fuel cell–solar cell hybrids,Biophotovoltaics,Photosynthetic microbial fuel cells
更新于2025-09-11 14:15:04
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Engineered Nano-Structured Virus/ZnO Hybrid Materials with Dedicated Functional Properties
摘要： Bio-inspired mineralization for the production of new functional materials offers mild reaction conditions suitable to integrate biological templates and build hierarchically organized hybrid nanostructures with defined properties. In this respect, tobacco mosaic virus (TMV) stands out due to its unique structural dimensions. Here, we present a novel mineralization pathway for synthesis of virus-based ZnO hybrids with multifunctional properties. Wild-type TMV (wt-TMV), two TMV mutants (E50Q and TMV-Cys) and amino-functionalized self-assembled monolayers (NH2-SAMs), as a reference, were used as templates. This mineralization approach allows control of the particle size of the inorganic phase. Further, the virus contributes additionally to the texturing of ZnO. Field effect transistors (FETs) built from the hybrid films showed reproducible results at optimized conditions at close to ambient conditions and without post-treatment. The significantly reduced threshold voltage of the E50Q/ZnO FET compared to NH2-SAMs/ZnO FET points to the impact of the organic template on FET performance. Nacre-like virus-based ZnO multilayers and corresponding monolithic references were prepared. The mechanical properties by means of Young’s modulus, hardness and fracture toughness were determined and an increase of the mechanical performance by genetic modification was observed.
关键词： field effect transistors,Bio-inspired mineralization,ZnO hybrids,mechanical properties,tobacco mosaic virus
更新于2025-09-11 14:15:04
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White-Light Emitting Di-Ureasil Hybrids
摘要： White-light emitting materials have emerged as important components for solid state lighting devices with high potential for the replacement of conventional light sources. Herein, amine-functionalized organic-inorganic di-ureasil hybrids consisting of a siliceous skeleton and oligopolyether chains codoped with lanthanide-based complexes, with Eu3+ and Tb3+ ions and 4,4'-oxybis(benzoic acid) and 1,10-phenanthroline ligands, and the coumarin 1 dye were synthesized by in situ sol–gel method. The resulting luminescent di-ureasils show red, green, and blue colors originated from the Eu3+, Tb3+, and C1 emissions, respectively. The emission colors can be modulated either by variation of the relative concentration between the emitting centers or by changing the excitation wavelength. White light emission is achieved under UV excitation with absolute quantum yields of 0.148 ± 0.015, 0.167 ± 0.017, and 0.202 ± 0.020 at 350, 332, and 305 nm excitation, respectively. The emission mechanism was investigated by photoluminescence and UV–visible absorption spectroscopy, revealing an efficient energy transfer from the organic ligands to the Ln3+ ions and the organic dye, whereas negligible interaction between the dopants is discerned. The obtained luminescent di-ureasils have potential for optoelectronic applications, such as in white-light emitting diodes.
关键词： lanthanide complexes,di-ureasil organic–inorganic hybrids,in situ sol–gel synthesis,white light emission,coumarin 1
更新于2025-09-10 09:29:36
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Core/Shell Upconversion Nanocrystal Hybrids with Temperature-Dependent Emission Color Changes for Multilevel Anticounterfeiting Applications
摘要： This work presents a novel and highly secure anticounterfeiting strategy based on core/shell upconversion nanocrystal (UCNC) hybrids with temperature-responsive multicolor emissions. Opposite luminescent temperature-dependences are found for active-core@inert-shell (thermal quenching) and active-core@active-shell (thermally induced enhancement) UCNCs. Accordingly, their hybrids are designed to show obvious color changes with increasing temperature under 975 nm excitation. Various color-shifting pathways (from white to green, blue to green, etc.) are achieved by adjusting the core/shell NC combinations in the hybrids. Moreover, color changes of the printed patterns using the hybrid NC inks can be realized by the simple heating treatment, or by increasing the laser power and prolonging the irradiation time. The results indicate the great potential of these core/shell NC hybrids for anticounterfeiting applications with high-level security and convenient authentication methods.
关键词： upconversion,anticounterfeiting,nanocrystals,hybrids,luminescence
更新于2025-09-10 09:29:36
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A facile synthesis of graphene nanoribbon-quantum dot hybrids and their application for composite electrolyte membrane in direct methanol fuel cells
摘要： In this work, we report the concept of synthesizing graphene nanoribbon-graphene quantum dot (GNR-GQD) hybrids with even grafting of GQD on GNR sheet in a facile single step process under ultrasonication in chlorosulfonic acid. Further, diazotization route is followed for the preparation of 4-benzenediazonium sulfonate precursor to sulfonate both GNR and GQD to form sulfonated graphene nanoribbons-sulfonated graphene quantum dots (sGNR-sGQD) nanohybrids. Synergistic and structure dependent effect of nanohybrids is seen via its dispersion in sulfonated poly(ether ether ketone) (sPEEK) to form nanocomposite membrane. sPEEK/sGNR-sGQD (1.5 wt. %) nanocomposite membrane shows remarkable direct methanol fuel cell (DMFC) performance compared to pristine sPEEK and Nafion 117 with 40 % increment in peak power density along with higher durability up to 100 h due to better physicochemical properties like water uptake, ion exchange capacity, proton conductivity, and reduced methanol crossover to suggest its potential which includes diverse membrane applications.
关键词： Graphene nanoribbon-graphene quantum dot hybrids,Nanohybrids,Nanocomposite membrane,Sulfonated poly(ether ether ketone),Direct methanol fuel cell
更新于2025-09-10 09:29:36
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Synthesis of In2S3/UiO-66 hybrid with enhanced photocatalytic activity towards methyl orange and tetracycline hydrochloride degradation under visible-light irradiation
摘要： In this study, a series of In2S3/UiO-66 (ISU) hybrids have been fabricated through the growth of In2S3 nanoparticles onto the surface of UiO-66 via a facile hydrothermal process. The as-obtained samples have been characterized by PXRD, SEM, TEM, XPS, UV–Vis DRS, PC, PL and BET. The photocatalytic performance is evaluated by methyl orange (MO) and tetracycline hydrochloride (TCH) degradation under visible light irradiation. The results show that the In2S3/UiO-66 hybrids exhibit a higher photocatalytic activity than that of the pure In2S3 and UiO-66. Interestingly, the ISU-40% possesses the highest photodegradation e?ciency towards MO and TCH, which can be attributed to the strong visible light absorption, high speci?c surface area as well as e?ective separation of photo-generated electrons and holes. In addition, the photocatalysis mechanism in MO degradation process is also explored.
关键词： Hybrids,Visible light,In2S3/UiO-66,Methyl orange,Photocatalysis mechanism,Tetracycline hydrochloride
更新于2025-09-10 09:29:36