Polysulfide nanoparticles-reduced graphene oxide composite aerogel for efficient solar-driven water purification

Along with the environmental pollution, the scarcity of clean water seriously threatens the sustainable development of human society.Recently, the rapid development of solar evaporators has injected new vitality into the field of water purification. However, the industry faces a considerable challenge of achieving comprehensive purification of ions, especially the efficient removal of mercury ions. In this work, we introduce an ideal mercury-removal platform based on facilely and cost-effectively synthesized polysulfide nanoparticles(PSNs). Further development of PSN-functionalized reduced graphene oxide(PSN-rGO) aerogel evaporator results in achieving a high evaporation rate of 1.55 kg m^(-2)h^(-1)with energy efficiency of 90.8% under 1 sun. With the merits of interconnected porous structure and adsorption ability, the photothermal aerogel presents overall purification of heavy metal ions from wastewater. During solar desalination, salt ions can be rejected with long-term stability. Compared with traditional water purification technologies, this highly efficient solar evaporator provides a new practical method to utilize clean energy for clean water production.

Innovation and application of dyes with high fixation

Reactive dyes are the main species for cotton dyeing due to their wide range of hue, satisfactory color fastness and facile application method. Aiming at increasing fixation on cotton fibers, benzimidazolone yellow reactive dyes, sulfonamide red reactive dyes and anthraquinone azo blue reactive dyes are designed. The preparation, characterization and application properties of these dyes with high fixation are introduced in detail. In order to achieve dye fixation to near 100%, macromolecular crosslinking reactive dyes are designed, their dyeing and fixing mechanism are discussed. These novel reactive dyes show promising application prospect in dyeing and printing of cotton fibers.

Effect of Anisotropic Yield Functions on the Accuracy of Material Flow and its Experimental Verification

This paper evaluates the performance of anisotropic yield functions based on mathematical methods which consider the prediction accuracy of yield stresses and values.The anisotropic yield functions being evaluated include one quadratic yield function and six nonquadratic ones.These yield functions are applied to describe the anisotropy of st eel sheets and aluminum alloy sheets to evaluate their predictability.The root-mean-square errors(RMSEs)are computed to quantitatively assess their performance.The computation results of RMSEs demonstrate that the Yld2004-18p yield function exhibits the highest accuracy but requires extensive tests to calculate anisotropic parameters.The Yld2000-2d and BBC2000 yield functions are the same and thus have the same prediction accuracy.The application to cylindrical cup drawing shows that,associated with the Yld2004-18p and Yld2000-2d yield functions,the finite element(FE)simulations of cup drawing process can predict cups with six or eight ears.Considering both efficiency and accuracy,the Yld2000-2d and BBC2000 yield functions,which have less anisotropic parameters to be calculated,are recommended for metals with intermediate anisotropy.

Nanobubbles loaded with carbon quantum dots for ultrasonic fluorescence dual detection

To increase the efficiency and accuracy of clinical tumor detection,we explored multiple imaging by preparing carbon quantum dot(CQD)-loaded nanobubbles for ultrasonic fluorescence dual detection.In this experiment,we prepared 1,2-dioleoyl-3-trimethylammonium-propane chloride(DOTAP)cationic liposomes using the film dispersion method and chose perfluoropentane as the core gas material of the nanobubbles.The nanobubbles were coupled with the negatively charged CQDs through the charge effect to prepare the testing agent for two-way diagnosis with ultrasound contrast and fluorescence detection.The formulation and preparation of the loaded CQD liposome nanobubbles were screened.In vivo experiments showed that nanobubbles can be enriched to the tumor site within 5 min,which enables clearer ultrasound imaging and is conducive to tumor detection.We expect CQD-loaded liposome(Lip-CQD)nanobubbles to become a new ultrasonic contrast agent for clinical applications that can provide a basis for early tumor diagnosis and thus earlier treatment.

Resection of orthotopic murine brain glioma

Glioma is a malignant brain tumor with a poor prognosis.Surgical resection is usually the first line of treatment.However,animal models of glioma do not include surgical resection and tumors are typically treated before they become advanced.This report demonstrates the feasibility of surgical resection of advanced gliomas in mice.The described technique establishes a murine model which could be used for the development of immunotherapy for advanced glioma after surgical resection.Use of surgical resection in murine models could increase the probability that therapies developed in mice will translate to human patients.

Facile fabrication of encryption composite materials with trilayer quasi-amorphous heterostructure

Encryption materials represent a major direction of information security,but it is challenging to realize the ideal security combining the complete hiding of complex coding,stability in transmission,camouflage,and reliable decoding.Herein,we report an innovative strategy for rationally constructing encryption composite materials with high security and portability.Compared with common colloidal photonic watermarks,our encrypted optical devices are composed of thermoplastic polyurethanes(TPU)protective layers,polystyrene(PS)switching layers and a Cd S coding layer.The optical shielding properties and phase state transition of PS layers enable high-level encoding and decoding security through thermal activation of light transmittance control.Meanwhile,the Cd S layer can be clearly revealed in decoding mode because of the high refractive index.Besides,the confinement protection of integrated TPU films prevents the trilayer quasi-amorphous heterostructure from damage.To establish the practical advantage,portable information carriers can be prepared for camouflage.Accordingly,the reliable encoding and decoding system,and ability to integrate with easy-to-carry products,make our composites a potentially high-security encryption device for anti-fraud technology.