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- 저자 : Zhaobo Jin (검색결과 2 건)
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Zhaobo Fan,Xiaojie Zhang,Youji Li,Xin Guo,Zhiliang Jin 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.110 No.-
Hydrogen evolution of inorganic photocatalysts is currently a hot research topic. In order to preparehighly efficient catalysts for hydrogen evolution, p-n type heterojunctions were successfully constructedby closely combining p-type Cu2O and n-type NiCo-LDH with opposite electrical properties by a simpleelectrostatic self-assembly. In addition, because the positions of the two single catalysts NiCo-LDH andCu2O Fermi levels are dissimilar from those of traditional p-n heterojunctions, the extremely high movementof Fermi levels forms a strong built-in electric field, which powerfully prevents the gradient diffusionof charge and facilitates the migration of intrinsic photocarriers. Furthermore, the flower clusterNiCo-LDH is composed of two-dimensional thin sheet structure, which has a large specific surface areaand can prevent Cu2O agglomeration. Under the condition of using triethanolamine solution and eosinY (EY) respectively as sacrifice reagent reducing agent and photosensitizer, the composite catalyst hasreached 18332 lmolg1 in 5 h, which was increased by 8.5 times compared to the pure Cu2O. Thisresearch provides an innovative strategy to construct a heterojunction between a metal double-layerhydroxide and a non-noble metal oxide to realize an effective photocatalytic hydrogen production.
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Zhihao Liu,Kui Qiu,Yu Dong,Zhaobo Jin,Luwei Liu,Jirong Wu 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.12
A non-aqueous phase (Sb/Fe/NMP) desulfurization system for the removal of hydrogen sulfide from naturalgas was constructed by introducing SbCl3 and FeCl3 in a specific ratio into N-methylpyrrolidone (NMP). The desulfurizingagent and its sulfur product were characterized, and the absorption pattern of H2S by the system wasinvestigated by static desulfurization experiments. The results indicate that the desulfurizer’s sulfur capacity can reach16 g/L at room temperature and pressure, and that adding the optimum amount of water and appropriate temperatureincrease can assist to increase desulfurization efficiency. The system maintained a sulfur capacity level of more than90% of the initial sulfur capacity after five consecutive desulfurization-regeneration cycles. XRD and XPS spectrogramrevealed that the regenerated solid product was high purity sulfur. Sb3+ is a key component to ensure the effectiveabsorption of H2S. The presence of a moderate amount of Fe3+ can oxidize and absorb small amounts of H2S and promotethe oxidative regeneration of the system. In addition, we combined the obtained experimental data with densityflooding theory (DFT) theoretical calculations to show that the effective coordination of Sb(III) with HS in the NMPenvironment is the main reason for the effective absorption of H2S by the desulfurizer. NMP is not involved in thecoordination absorption process of hydrogen sulfide.
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