Investigation of isotopic linkages between raw materials and black powder.

The stable isotope analysis of black powder (BP) is of great significance for its comparison and source inference. Previous studies have verified the feasibility of distinguishing different BP samples through stable isotopes. However, the impact of raw materials and synthesis processes on the stable isotopes of BP remains unclear.

Metal-organic frameworks as solid-phase microextraction adsorbents for the determination of triacetone triperoxide by gas chromatography-mass spectrometry.

Triacetone triperoxide (TATP) is a high-power explosive which is often used by criminals. The detection of TATP is of great significance for solving the explosion cases. However, the preconcentration and analysis of trace levels of TATP still pose challenges for analytical researchers.

Partially oxidized MXenes-derived C-TiO/TiC coupled with Fe-CN as a ternary Z-scheme heterojunction: Enhanced photothermal and photo-Fenton performance.

Photo-Fenton reaction combining the photocatalytic reaction and Fenton reaction showed excellent degradation performance. However, it highly demanded the catalysts to display outstanding activity in these two reactions. Herein, Fe-doped carbon nitride/MXenes-derived C-TiO/TiC (Fe-CN/TiC/C-TiO) was prepared via two steps: Fe-CN and TiC were assembled via face-to-face attachment, following by in-situ partial oxidation of TiC to C-TiO.

Preparation of double-yolk egg-like nanoreactor: Enhanced catalytic activity in Fenton-like reaction and insight on confinement effect.

Peroxymonosulfate (PMS)-based Fenton-like reaction is an effective technique for the pollutant degradation, and the Co-based metal organic frameworks displayed the excellent activity for the PMS activation. Nevertheless, how to further improve the catalytic activity, suppress the leaching of toxic cobalt ions, and realize the rapid separation were still challenges for practical application. In this work, a novel solution was proposed: encapsulating FeO and Prussian blue analogue (PBA) into the polypyrrole (PPy) shell and constructing a "double-yolk egg-like" FeO/PBA@PPy as a nanoreactor.

A simple and green method to prepare non-typical yolk/shell nanoreactor with dual-shells and multiple-cores: Enhanced catalytic activity and stability in Fenton-like reaction.

Nowadays, non-typical yolk/shell structure has drawn much attentions due to the better catalytic performance than traditional counterparts (one yolk/one shell). In this study, ZIF-67 @CoSiO/SiO yolk/shell structure was prepared in one-step at room temperature, in which ZIF-67 was served as the hard-template, HO was served as etchant and tetraethyl orthosilicat was served as the raw material for CoSiO/SiO. After calcination, the non-typical CoO @CoSiO/SiO yolk/shell nanoreactor with CoSiO/SiO dual-shells and CoO multiple-cores was obtained.

Enhancing the heterojunction component-interaction by in-situ hydrothermal growth toward photocatalytic hydrogen evolution.

The in-situ synthesis method to construct a heterostructure with a tight binding interface can promote the separation and transfer of charges, which is particularly crucial for improving photocatalytic efficiency. Herein, we have successfully synthesized a high-efficiency photoreduction catalyst by in situ growing a layer of flaky nickel chromium layered double hydroxides nanosheets (LDH) on carbon nitride hexagonal tube (CN) in hydrothermal. The tube-flakes like CN-LDH heterostructures have enhanced hydrogen evolution efficiency (14.

Simultaneous absorption of NO and SO by combined urea and FeEDTA reaction systems.

SO and NO emitted from coal-fired power plants have caused serious air pollution in China. In this work, a novel mixed absorbent, FeEDTA/urea, was employed for simultaneous removal of SO and NO in a packed tower, with a corresponding optimal ratio of 0.014 mol L : 5%.

SO enhanced desorption from basic aluminum sulfate desulphurization-regeneration solution by falling-film evaporation.

To find the optimal structure of the converging-diverging tube and develop a high-efficiency falling-film evaporator, the heat and mass transfer performances of falling-film evaporation with converging-diverging tubes of different dimensions were studied. The optimal converging-diverging tube was used in falling-film evaporation desorption of the basic aluminum sulfate desulphurization-regeneration solution, and different influential factors on the desorption effect were analyzed. It was found that converging-diverging tubes with large falling-film flow rate performed well in the heat and mass transfer of falling-film evaporation, and their rib height largely affected the heat and mass transfer performances.

Nitric oxide removal by combined urea and FeEDTA reaction systems.

(NH)CO as well as FeEDTA is an absorbent for simultaneous desulfurization and denitrification. However, they have their own drawbacks, like the oxidation of FeEDTA and the low solubility of NO in urea solution. To overcome these defects, A mixed absorbent containing both (NH)CO and FeEDTA was employed.

Simultaneous removing SO2 and NO by a new system containing cobalt complex.

Absorption and catalytic oxidation of nitric oxide can be achieved by using cobalt(III) ethylenediamine (Co(en)2(3+)). When simultaneous absorbing SO2 and NO, the precipitation of Co2(SO3)3 will be yielded and the NO removal will be decreased. A new catalyst system using Co(en)3(3+) coupled with urea has been developed to simultaneous remove NO and SO2 in the flue gas.