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The thus fabricated crumpled aerogel exhibits high elasticity and hydrophobicity with superior absorption capacity of organic pollutants, which is 224%–406% higher than that of conventional graphene aerogels assembled by flat and stiff plates, outperforming most of the pioneering reported graphene aerogels synthesized by sol-gel method.
The results reveal that nitrogen-doped graphene aerogel prepared using aniline as nitrogen source possesses a large specific surface area, high nitrogen content, good mechanical strength and excellent electrical conductivity.
In contrast to the brittle pristine graphene aerogel, the resulting polymer-coated graphene aerogel demonstrates high elastic properties.
Therefore, a Co-N decorated graphene aerogel framework with a large surface area (485 m(2) g(-1)) and an abundance of meso/macropores is effectively formed after heat treatment.
It is hoped that our current work could open promising prospects for the rational utilization of highly conductive commercial graphene to fabricate graphene-based aerogel for enhanced photoredox applications.
The functionalized graphene aerogel represents superior physical features, including low density (bulk density of 14.4 mg cm −3 ), high porosity (>87%), mechanical stability (supports at least 2600 times its own weight), and hydrophobicity (contact angle of 144°).
Herein, we report a simple method toward fabricating graphene aerogel (GA) from graphene oxides only by photoreduction, which is for the first time used to harvest solar energy.
Graphene aerogel is a relatively new type of aerogel that is ideal for energy storage applications because of its large surface area, high electrical conductivity and good chemical stability.
Adapting the 3D printing technique to graphene aerogels realizes the possibility of fabricating a myriad of complex aerogel architectures for a broad range of applications.
The enhancement may result from the unique 3D graphene architecture, and the efficient assembly between the Pt NPs and graphene aerogel.

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Why graphene oxide should be chosen over reduced graphene oxide in photocatalytic activity?
5 answers
Graphene oxide should be chosen over reduced graphene oxide in photocatalytic activity due to its superior properties. Graphene oxide-based photocatalysts exhibit enhanced performance in CO2 reduction, thanks to their excellent physical and chemical characteristics and strong π–π conjugation with CO2 molecules. Furthermore, in the context of nanocomposite materials, the concentration of graphene oxide plays a crucial role in increasing the efficiency of the material, with a 7 wt% concentration showing significant improvements in photocurrent and absorption ability. Additionally, TiO2-RGO composites have demonstrated better degradation rates for various dyes compared to TiO2 alone, attributed to graphene's strong electron transport ability and adsorption properties. These findings collectively highlight the importance of graphene oxide in enhancing photocatalytic activities in various applications.
What are the possible applications of laser powder bed fusion in reactive atmosphere?
4 answers
Laser powder bed fusion (LPBF) in a reactive atmosphere offers diverse applications. By incorporating nitrogen, ZrN nanocrystals can be dispersed in a Zr-based metallic glass, enabling tailored structures and mechanical properties near the surface. Additionally, the use of freeze-dry pulsated orifice ejection method (FD-POEM) to fabricate MoSiBTiC-La2O3 composite powders for LPBF results in advanced heat-resistant Mo-based alloys with tailored structures for ultrahigh-temperature applications. Introducing small amounts of silane to the argon process gas eliminates residual oxygen, forming SiO2 nanoparticles that enhance flowability without affecting the processing window of Ti-6Al-4V in LPBF, showcasing improved powder characteristics. These applications demonstrate the versatility and potential of LPBF in a reactive atmosphere for developing advanced materials with tailored properties.
What are the roles of oxygen vacancies on the structural stability of YBCO superconductor?
5 answers
Oxygen vacancies play crucial roles in the structural stability of YBCO superconductors. In YBa2Cu3O7−δ, oxygen vacancies impact the optical properties, affecting absorption peaks and shifting them towards the infrared spectrum. Additionally, under the influence of an external electric field, oxygen vacancies in YBCO can lead to the migration of O atoms towards the surface, affecting the electronic structure. In bismuth vanadate, oxygen vacancies cause significant structural distortions, leading to peak splitting in X-ray diffraction patterns, emphasizing the importance of oxygen partial pressure control during synthesis. Furthermore, in zinc-cobalt oxide microspheres, abundant oxygen vacancies contribute to enhanced capacitive performance and long-term cycling stability in supercapacitors. Oxygen vacancies thus play diverse and critical roles in the structural stability and properties of various materials.
What are the current trends in the use of aerogels in various industries?
4 answers
The current trends in the use of aerogels span across various industries, showcasing their versatility and potential applications. In the construction field, aerogels are gaining prominence for energy-saving purposes, particularly in building insulation. Biomedical applications are another key area, where aerogels are explored for drug delivery, tissue scaffolds, wound healing, and regenerative medicine. Moreover, in bone tissue engineering, nanocellulose-based aerogels are being extensively studied due to their ability to mimic the extracellular matrix and promote tissue healing. Additionally, aerogels are finding applications in flame-retardant and thermal-insulating fields, especially when derived from green materials like nanocellulose, chitosan, and starch. These trends highlight the broad spectrum of industries benefiting from the unique properties of aerogels.
Durian seed as a chalk?
4 answers
Durian seed has been explored for various applications, but using it as chalk is not a common practice based on the available research. Studies have highlighted the potential of durian seed gum as an excipient in topical drug delivery, as a substrate for angkak production, and for the removal of dyes from aqueous solutions. Additionally, durian seed has been utilized in the synthesis of a durian-like mischcrystal TiO2/graphene photocatalyst for desulfurization. While durian seed has shown promise in diverse applications, there is no specific mention of its use as chalk in the existing literature. Further research may be needed to explore the feasibility and effectiveness of utilizing durian seed for chalk production.
What the methods for fabrication of carbon electrodes using silicon wafers?
5 answers
The fabrication methods for carbon electrodes using silicon wafers involve several key steps. Initially, a mixture containing a precursor, silicon particles, and carbon fibers is provided on a current collector, followed by pyrolysis to convert the precursor into carbon phases, forming a composite material adhered to the current collector. Another approach includes forming a composite material film by providing a mixture with a precursor and silane-treated silicon particles, then pyrolyzing the mixture to create the composite material film with distributed silicon particles. Additionally, a method entails coating a current collector with a slurry containing silicon particles, polymeric binders, and carbon fibers, followed by pyrolysis at specific temperatures to produce an electrode with a silicon-based host material layer. These methods collectively contribute to the efficient fabrication of carbon electrodes using silicon-based materials.
What is the relationship between the amount of incident light and the catalytic properties of Cu2O?
5 answers
The relationship between the amount of incident light and the catalytic properties of Cu2O nanoparticles is crucial for understanding their photocatalytic efficiency. Studies have shown that Cu2O nanoparticles with different shapes and sizes exhibit varying photocatalytic activities under different light intensities. Specifically, Cu2O crystals with irregular but thick platelet-like shapes and small granule spheres showed enhanced photocatalytic activity. Additionally, decorating Cu2O nanooctahedra with small Au nanograins improved the photocatalytic activity even under low-power excitation. Furthermore, Cu2O nanostructures exhibiting dielectric Mie resonances demonstrated significantly higher photocatalytic rates compared to those without, showing a relationship between the size of Cu2O nanospheres and nanocubes and their photocatalytic efficiency. These findings highlight the importance of incident light intensity in modulating the catalytic properties of Cu2O nanoparticles.
How does the wavelength of incident light affect the rate of catalysis in Cu2O?
5 answers
The wavelength of incident light significantly influences the rate of catalysis in Cu2O. Cu2O nanoparticles have been studied for their photocatalytic properties, especially in dye degradation processes. Different wavelengths of light, such as green, blue, red, and amber, have been utilized to selectively degrade methylene blue dye peaks through Mie resonance mediated photocatalysis using Cu2O as a catalyst. Additionally, Cu2O/TNA/Ti junctions have shown higher photocurrent spectral responses due to the UV-visible light absorption of Cu2O, leading to improved photocatalytic properties compared to other junctions. Moreover, the absorption range of Cu2O/ZnO catalysts shifts from ultraviolet to visible light due to the doping of Cu2O, enhancing the degradation efficiency of methyl orange solution under visible light.
How much H2 formed from photoreforming vs water splitting in photocatalysis?
5 answers
In the realm of photocatalysis, the generation of H2 can stem from various processes such as photoreforming and water splitting. Photoreforming, as demonstrated by CoP modified by carbon dots (CoP/CDs composite), can lead to simultaneous production of H2 and H2O2 via a 4e−–2e− cascaded pathway. This process yielded a significant H2 yield of 239 μmol/h/g. On the other hand, water splitting, exemplified by the use of Ru‐In SA/TiO2, showcased an impressive H2 evolution rate of 174.1 µmol h−1. These findings underscore the potential of both photoreforming and water splitting pathways in generating H2 through photocatalysis, with each approach offering distinct advantages in terms of efficiency and production rates.
What is the chemical composition of the nano-oxide iron used in the synthesis reaction with bombesin?
5 answers
The nano-iron oxide used in the synthesis reaction with bombesin is a superparamagnetic iron oxide nanoparticle (SPION) coated with dextran. This SPION was conjugated with bombesin to create a targeting contrast agent for breast cancer detection using MRI. Additionally, the SPION used in another study was incorporated into micelles along with a near-infrared fluorescence dye and a tumor-targeted peptide, resulting in a dual-modality MR/near-infrared fluorescence imaging nanomicelle. Furthermore, a different research paper utilized N,N,N-trimethyl chitosan-coated magnetic nanoparticles conjugated with S-2-(4-isothiocyanatobenzyl)-1,4,7,10-tetraazacyclododecane tetraacetic acid (DOTA) and bombesin for PET/MRI imaging of breast cancer. These studies collectively highlight the use of SPIONs and their derivatives in conjunction with bombesin for cancer imaging applications.
What is the synthesis of nano ferric oxide using bombesin ligand?
5 answers
The synthesis of nano ferric oxide using bombesin ligand involves conjugating bombesin (BBN) with superparamagnetic iron oxide nanoparticles (SPIONs) to create a targeted contrast agent for cancer detection. This process includes coating SPIONs with dextran and then conjugating them with BBN to enhance accumulation in cancer cells and improve MRI sensitivity. The BBN-conjugated nanoparticles exhibit high stability in human blood serum, biocompatibility, and specific binding to cancer cells overexpressing gastrin-releasing peptide receptors. Additionally, the conjugation of the bombesin analog to dye-functionalized SPIONs via click chemistry demonstrates a novel approach for creating potential MRI probes for prostate cancer detection. These findings highlight the promising potential of utilizing bombesin ligands in the synthesis of nano ferric oxide for targeted cancer imaging applications.