Hydrogen peroxide (H 2 O 2 ) can be considered as one of the world's indispensable chemicals. However, the synthetic process can prompt several severe environmental and human health issues. However, solar H 2 O 2 production may provide opportunities to mitigate such issues. Graphitic carbon nitride (g-C 3 N 4 ) has emerged as one promising material for photocatalytic applications due to its unique properties. Although tremendous efforts in engineering g-C 3 N 4 have been proposed to improve catalytic results, the materials obtained still have some issues.Additionally, the mechanisms behind the production of H 2 O 2 by using such materials are not yet fully understood. Herein, we conducted a literature survey reviewing the production of H 2 O 2 using g-C 3 N 4 -based materials. The essential aspects of and current challenges in photocatalytic H 2 O 2 generation are discussed, which may provide insight for researchers to overcome barriers and develop sustainable methods for H 2 O 2 production.

In this study, to investigate the extraction of triterpenoids from the Vietnamese red G. lucidum by ultrasound‐assisted extraction (UAE) method using ethanol as a solvent, the determination of the four single factors influence on the triterpenoid content including liquid‐to‐solid ratio, extraction power, extraction temperature, and extraction time was carried out for the performance of experiments on simultaneous effects by Central Composite design. The results showed that based on ultraviolet‐visible spectroscopy analysis, the highest yield of triterpenoids could be achieved with value of 18.3751 mg/g under optimal extraction conditions including extraction time of 60 min, ultrasonic power of 360 W, liquid‐to‐solid ratio of 38 : 1 mL/g, and ultrasonic temperature of 48 °C. To determine the characteristics of the obtained extract, the Gas chromatography‐mass spectrometry, the Fourier‐transform infrared spectroscopy, scanning electron microscope, and the thermogravimetric analyzer were employed in this study. Besides, for antioxidant capacity evaluation, the DPPH free radical scavenging assay, H2O2 scavenging assay, and the ABTS radical cation decolorization assay were carried out whereas the anticancer evaluation results denoted the potential for anticancer agents of G. lucidum extract. Therefore, it could be concluded that UAE is a promising method for triterpenoid extraction with antioxidant properties.

Hydrogen peroxide (H2O2) plays an essential role in many industrial fields and is globally listed as one of the indispensable chemicals. However, synthesizing H2O2 using the anthraquinone oxidation (AO) process requires multiple steps and releases hazardous organic compounds, which could seriously lead to many environmental and human health-related problems. Therefore, an urgent need for manufacturing H2O2 using green and sustainable methods to deal with the mentioned issues has enormously captured scientific interest. In this circumstance, the integration of piezo and photo effects on the generation of H2O2 from water and oxygen with the requirements of using low-cost and efficient catalytic materials is majorly considered. Herein, we report a simple and efficient way to produce H2O2 by employing modified graphitic carbon nitride (g-C3N4) catalysts to achieve the targets. The nanostructured materials were intensively characterized to deeply understand how the catalysts work to produce a significant amount of H2O2, reaching up to 1147.03 μM within 1 h irradiation. The findings showed that the fabrication of novel metal–carbon bonds and other functional groups could be responsible for adding more active sites in the system, promoting the enhancement of catalytic activities. This work would offer scientists a novel outlook to design and develop carbon-based materials for producing fine chemicals from catalysis and other applications.