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PVP intercalated metallic WSe<sub>2</sub> as NIR photothermal agents for efficient tumor ablation
摘要： Transition metal dichalogenides (TMDCs) with unique layered structures hold promising potential as transducers for photothermal therapy. However, the low photothermal conversion efficiency and poor stability in some cases limit their practical applications. Herein, we demonstrate the fabrication of an ultrathin homogeneous hybridized TMDC nanosheets and their use for highly efficient photothermal tumor ablation. In particular, the nanosheets were composed of metallic WSe2 intercalated with polyvinylpyrrolidone (PVP), which was facilely prepared through a solvothermal process from the mixture of selenourea crystals, WCl6 powder along with PVP polymeric nanogel. Our characterizations revealed the obtained nanosheets exhibited excellent photothermal conversion efficiency, improved biocompatibility and physiological stability attributing to the combined merits of metallic phase of WSe2 and hydrophilic PVP insertion. Both the histological analysis of vital organs and in-vitro/in-vivo tests confirmed the nanosheets as actively effective and biologically safe in this phototherapeutic technique. Findings from this non-invasive experiment clearly emphasize the explorable therapeutic efficacy of layered-based hybrid agents in future cancer treatment planning procedures.
关键词： Solvothermal synthesis,intercalation,metallic tungsten diselenide,photothermal therapy
更新于2025-09-10 09:29:36
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Effect of the solvents on the photocatalytic properties of ZnFe2O4 fabricated by solvothermal method
摘要： The photocatalyst ZnFe2O4 (ZFO) nanoparticles with different diameters were synthesized by a solvothermal method using water, ethylene glycol (EG) and methylgiycol (EM) as the solvents. The results showed that the polarity of the solvents have an important influence on morphology and photocatalytic performance of the ZnFe2O4. The higher polarity of the solvent (H2O) was benefited to form smaller diameter nanoparticles, which showed higher photocatalytic efficiency. The removal efficiencies of the ZFO/H2O, ZFO/EG and ZFO/EM for MB were 85.42%, 61.11% and 51.19%, which accorded with the order of the polarity of solvents.
关键词： ZnFe2O4,Nanoparticles,Solvothermal,Photocatalytic,Polarity
更新于2025-09-09 09:28:46
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Band Engineering of SrTiO <sub/>3</sub> : Effect of Synthetic Technique and Site Occupancy of Doped Rhodium
摘要： It is well known that doping of Rh into the SrTiO3 lattice introduces 4d donor levels within the band gap which causes reduction in the gap and extends the photocatalytic activity to the visible region of solar spectrum. The mid gap states formed also act as recombination centers and diminishes the efficiency of the material. Herein, we present a combined theoretical and experimental approach to avoid the formation of the so called acceptor mid gap states. For the first time, we study the effect of occupancy of Rh in the Sr site. First principles calculations reveal that mixed occupancies of Rh into Sr and Ti sites lead to the introduction of acceptor levels within the band gap leading to decrease in photocatalytic efficiency. A facile one pot solvothermal approach by avoiding high temperature calcinations is reported to obtain Rh doped SrTiO3 nanoparticles in Rh3+ states suppressing the formation of Rh4+ states by directing Rh towards Sr sites. The photocatalytic activity of Rh doped SrTiO3 nanoparticles is studied in the case of degradation of methylene blue wherein 1.0 Rh sample was found to be highly efficient.
关键词： solvothermal synthesis,SrTiO3,photocatalysis,band engineering,Rh doping
更新于2025-09-09 09:28:46
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Xerogel Solvothermal in Different Alcohols of Cu and N Codoped TiO2 Powders: Characterization Photocatalytic Oxidation of Acetone
摘要： In this study, mesoporous Cu and N co-doped TiO2 crystals were synthesized with Cu and N co-doped titania xerogel by solvothermal treatment in different alcohols and the characteristics of Cu and N co-doped TiO2 were investigated with XRD, SEM, UV-vis and N2 sorption analysis. Results indicated that different alcohols facilitated formation and stability of pure anatase phase. The photocatalytic activity of samples was evaluated by the photocatalytic oxidation of acetone under visible light. The extraordinary photocatalytic performance of the Cu and N co-doped TiO2 crystals were synthesized with titania xerogel by solvothermal treatment in ethyl alcohol. This enhanced photoactivity is related to the bandgap narrowing, good dispersibility, the smaller pores and the larger specific area.
关键词： acetone,photocatalytic,solvothermal,alcohol
更新于2025-09-09 09:28:46
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Influence of solvent in solvothermal synthesis of Cu3SnS4: Morphology and band gap dependant electrocatalytic hydrogen evolution reaction and photocatalytic dye degradation
摘要： Cu3SnS4 (CTS) with various morphologies have been synthesized via solvothermal method. The influence of different solvents such as deionized water (CTS-DI), N,N-dimethylformamide (CTS-DMF) and poly ethylene glycol (CTS-PEG) has been investigated. XRD patterns of all the prepared samples exhibit tetragonal structure with preferential orientation along (1 1 2) direction. It is found that the solvents play a key role to tune the morphology and band gap. The morphology varied as irregular sheet like structure, mesoporous structure and feather like structure for CTS-DI, CTS-DMF and CTS-PEG, respectively. The band gap was found to be 1.33, 1.65 and 1.19 eV for CTS-DI, CTS-DMF and CTS-PEG, respectively. Electrocatalytic hydrogen evolution reaction and photocatalytic dye degradation of MB were tested using the prepared CTS samples. As an electrocatalyst or photocatalyst, it is found that CTS-DMF with mesoporous structure shows an enhanced catalytic activity with lower overpotential, a smaller Tafel slope (88 mV/dec), high stability in acidic medium and an enhanced photocatalytic activity. A more realistic mechanism for the photocatalytic activity of CTS-DMF is proposed.
关键词： Solvothermal,Cu3SnS4,Electrocatalyst,Photocatalyst
更新于2025-09-09 09:28:46
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Investigation of photoelectrochemical activity of cobalt tin sulfide synthesized via microwave-assisted and solvothermal process
摘要： Highly active cobalt tin sulfides (CTS) nanocomposite have been prepared in a short time at 70 oC by using microwave-assisted process and solvothermal synthesis process. According to improve the activity, cobalt tin acetate hydroxide prepared using microwave treatment is used for the preparation of CTS in both synthetic methods. The resultant product has been characterized using X-ray diffraction, transmission electron microscope (TEM), Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), and photoelectrochemical analysis. The Microwave processed cobalt tin sulfides (MW-CTS) nanocomposite offers less size of 180 nm while comparing with solvothermal based CTS (ST-CTS). Also, possess a high surface area of 464.54 m2g-1 without much aggregation due to the uniform heating and more reaction time. Moreover, the CTS synthesized by microwave method offers higher catalytic activity than obtained from the solvothermal process, owing to smaller size, high surface area, enhanced charge transfer rate with high optical absorption plays a vital role in governing the photoelectrochemical properties.
关键词： nanocomposites,photoelectrochemical,solvothermal,microwave-assisted,Cobalt tin sulfide
更新于2025-09-09 09:28:46
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Synthesis and Characterization of CaWO4 Phosphor Powders in Glycerol Solvent by Solvothermal Method
摘要： A solvothermal method had been applied to synthesize CaWO4 powders. We used glycerol as the solvent and designed different reaction conditions to explore the effect of different factors (such as pH, temperature, time and surfactant). All products had been characterized by X-ray diffraction, X-ray spectrometry, scanning electron microscopy and fluorescence. It is observed that the temperature played an important role in crystallinity and fluorescence. The concentration of surfactant also had an effect on its morphology. On the basis of a series of experiments, we found that the sample prepared at the condition of pH = 10, T = 160 °C, t = 12 h had well-crystalline, well-dispersed and strong fluorescence.
关键词： Solvothermal,Characterization,Glycerol,CaWO4
更新于2025-09-09 09:28:46
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Synthesis of 3D Hierarchical Structure TiO2 and Its Photocatalytic Activity
摘要： 3D hierarchical structure TiO2 can be synthesized via a solvothermal method using butyl titanate as precursor and acetic acid as solvent. The microspheres were characterized and analyzed by X-ray diffraction (XRD), electron microscope scanning (SEM), transmission electron microscope (TEM), N2 adsorption-desorption, the ultraviolet, X-ray photoelectron spectroscopy (XPS), photoluminescence spectroscopy (PL), ultraviolet and visible spectrophotometer (UV-Vis). The photocatalytic degradation performance was evaluated under the condition of methyl orange (MO) simulating wastewater. The results showed that the 3D hierarchical structure was one-step synthesized by the coordination of several surfactants, and as the time of solvent heat increases, morphology, and structure can be regulated from a 3D hierarchical structure to the grain-shaped, and the process of dissolution, recrystallization and orientated growth occurred during the course of reaction, which is different from the previous literature. The morphology of TiO2 can be regulated and controlled by reaction time. 3D hierarchical structure anatase TiO2 exhibited excellent photocatalytic activity in the degradation of organic compounds. The unit of hierarchy structure interconnected with each other, forming of various sizes of holes, which increase the specific surface area and are beneficial to the diffusion of the object molecules.
关键词： Solvothermal,Photocatalysis,3D hierarchical structure,Titania
更新于2025-09-09 09:28:46
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Ultrathin tungsten bronze nanowires with efficient photo-to-thermal conversion behavior
摘要： In this work, we describe a simple one-step solvothermal method to synthesize ultrathin quaternary tungsten bronze nanowires (QTBNWs). In addition, a series of alkali metal-doped QTBNWs can be prepared by simply changing the type of starting alkali carbonate and tungstate. The as-synthesized QTBNWs exhibits strong near-infrared (NIR) rays absorption, high visible light transmission and excellent photo-to-thermal conversion behavior, which are superior to those of tungsten bronze nanorods and ternary TBNWs. And its excellent photothermal performance should be attributed to great localized surface plasmon resonances (SPR).
关键词： solvothermal method,photo-to-thermal conversion,near-infrared absorption,ultrathin tungsten bronze nanowires,surface plasmon resonances
更新于2025-09-09 09:28:46
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Microwave-Assisted Solvothermal One-Pot Synthesis of RuO <sub/>2</sub> Nanoparticles: First Insights of Its Activity Towards Oxygen and Chlorine Evolution Reactions
摘要： A microwave-assisted solvothermal method is proposed as a rapid and low-cost fabrication procedure of RuO2 nanoparticles using citric acid as stabilizing agent in ethylene glycol, and H2O2 as oxidizing agent at 180 °C. Structural and morphological characterizations of the powder are investigated using X-Ray diffraction (XRD), scanning electronic microscopy (SEM) and transmission electron microscopy (TEM). XRD analysis shows that there is a synergic effect to obtain RuO2 nanoparticles when 6% v/v H2O2 is added followed by a calcination of the powder, due to reactive oxygen intermediates (1O2, HO(cid:0) 2, 2, HO* *OH) generated in the first stage. TEM and SEM images of as-synthesized material exhibit an uniform particle distribution (PSD) of RuO2 nanoparticles with averaged diameter of ca. 38 nm, and its indexing indicates the RuO2 stoichiometry with high degree of crystallinity. The preliminary electrocatalytic performance of RuO2 nanoparticles coated on Ti is investigated using voltammetry and electrochemical impedance spectroscopy (EIS), towards the oxygen (OER) and chlorine evolution reaction (CER) in 1 mol L(cid:0) 1 H2SO4 and 0.1 mol L(cid:0) 1 NaCl, respectively. Cyclic voltammograms of RuO2 display typical behaviors for OER and CER at 1.25 and 1.1 V vs Ag/AgCl, respectively. A Tafel slope of 44 mV dec(cid:0) 1 corrected for ohmic drop was obtained in sulfate media which confirmed the OER mechanism in the absence of chlorides; while this parameter is around 25 mV dec(cid:0) 1 in NaCl (CER), strongly depending on the chloride concentration and the extent of OER input. In NaCl media, the energy barriers represented by the charge transfer resistances for CER are overcome at more positive potentials than for OER, and a greater activity of the O2 evolution is observed as the potential became more positive.
关键词： Microwave,CER,OER,Electrocatalysis,Solvothermal,RuO2 Nanoparticles
更新于2025-09-09 09:28:46