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The preparation of S-scheme heterojunctions has attracted considerable attention in the academic community as a highly effective approach to enhance the separation and migration of electrons and holes, thereby significantly improving the catalytic efficiency of photocatalysts. In this work, a novel S-scheme ipolymer heterojunction photocatalyst, Cd3(C3N3S3)2/Zn3(C3N3S3)2(CdTMT/ZnTMT), which synergy with π-conjugate system, was synthesized using an innovative in-situ hydrothermal method. Through a series of rigorous characterization tests, the formation of an S-scheme heterojunction between CdTMT and ZnTMT was confirmed. Particular emphasis is placed on the effective enhancement of photocatalytic activity of photocatalysts through π-conjugated orbitals and built-in electric field after combining double-organic conjugated polymer-shaped ZnTMT and CdTMT. Performance tests that show the photocatalytic hydrogen evolution performance of the composite was significantly boosted to an impressive 45.24 mmol∙g−1∙h−1, which is 215.43 times that of single catalyst ZnTMT and 1.76 times that of CdTMT. Finally, this paper discusses the possibility and development prospect of double polymer to construct S-scheme heterojunctions to improve the activity of photocatalysts.

The relationship between antifungal susceptibility and mortality of cryptococcal meningitis (CM) in HIV-negative patients is poorly understood.

In recent years, semiconductor catalysts have attracted lots of attention due to their substantial redox capability and adequate stability. However, many semiconductor catalysts have difficulties in realizing real word applications because of the high complexation and low oxidizing ability of photogenerated electron-holes. In-depth investigation has revealed that the S-scheme heterojunction possesses a unique mechanism of carrier movement, resulting in a robust redox capacity and strong driving force. Herein, we synthesized an In2O3/Bi19Br3S27step-scheme (S-scheme) heterojunction through the hydrothermal method comprised of Bi19Br3S27nanoflowers grown on In2O3nanospheres. This configuration effectively facilitates the separation and transfer of photogenerated charge carriers. As a result, the reduction yield of CO2by In2O3/Bi19Br3S27composite reaches 28.36 µmol h−1g−1, which is 19 times higher than that of In2O3and 3.5 times higher than that of Bi19Br3S27. Furthermore, the intermediates involved in the photocatalytic reaction were examined through in situdiffuse reflectance infrared Fourier transform spectroscopy, revealing the reaction process of photocatalytic reduction of CO2. This work offers a concept on the method of constructing S-scheme heterojunction photocatalysts to enhance the catalyzed reduction of CO2.

Honeycomb sandwich beams are one of the most basic engineering structures and are highly susceptible to external excitation, which may cause amplified vibration phenomena. In response to this concern, support boundary measures with superior elastic properties are implemented to effectively mitigate transverse vibration interference. This paper explores the influence of beam geometry nonlinearity on structural vibration and introduces the concept of vibration transferability. The multi-mode resonant frequency of the elastic support boundary beam is analyzed. The significant impact of support stiffness symmetry on vibration response has been explored. Use approximate analytical methods and numerical calculation methods to mutually verify the research results. Observe how different parameters affect the steady-state response. The transmission law of multi-mode resonance response on elastic sandwich beams is analyzed. Compared with the vibration transmission properties of rigid boundaries, it has been confirmed that elastic supported boundaries have significant advantages in vibration isolation performance. Compared to amplitude, vibration transferability can more accurately depict vibration characteristics in high-order resonance states. This article will further explore the isolation performance of honeycomb sandwich beams and objectively reflect their isolation effect through the vibration transmission rate, thus helping to improve the overall seismic performance of engineering structures.