Recent developments in photocatalytic production of hydrogen peroxide.

Hydrogen peroxide (HO), an environmentally friendly strong oxidant and energy carrier, has attracted widespread attention in photocatalysis. Artificial photosynthesis of HO using water and oxygen as raw materials, solar energy as an energy source, and semiconductor materials as catalysts is considered a promising technology. In the past few decades, encouraging progress has been made in the photocatalytic production of HO.

P-doped MnCdS coupled with cobalt porphyrin as co-catalyst for the photocatalytic water splitting without using sacrificial agents.

Photocatalytic water splitting over semiconductors is an important approach to solve the energy demand of human beings. Most photocatalytic H generation reactions are conducted in the presence of sacrificial agent. However, the use of sacrificial reagents increases the cost of hydrogen generation.

Mononuclear ruthenium (II) complex covalently anchored on melem and g-CN as efficient heterogeneous catalysts for chemical water oxidation.

Ru-melem and Ru-CN were synthesized by a simple and facile strategy to construct a novel covalently anchoring by introducing easily synthesized amide bond as a bridge connecting the Ru-terpy and melem or g-CN, respectively. The covalent anchoring of Ru complex on melem or CN not only makes these materials exhibit water oxidation activity under Ce-driven (Ce = Ce(NH)(NO)) reaction condition, but also makes the obtained heterogeneous catalysts show higher catalytic activity than the corresponding homogeneous catalysts, which reveals that the covalent anchoring strategy of Ru complex is beneficial to improve the catalytic activity of homogeneous Ru catalysts. The synthetic method of hybrid catalysts offers an insightful strategy for enhancing water oxidation activity of molecular catalysts.

Adsorption of Co(II) from aqueous solution using municipal sludge biochar modified by HNO.

Here adsorption studies were proposed on a carboxylated sludge biochar (CSB) material modified by HNO to assess its capacity in the removal of cobalt from aqueous solution. The as-prepared sludge biochar material was characterized by Brunauer-Emmett-Teller (BET) analysis, Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), energy-dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The isotherm process could be well described by the Langmuir isotherm model.