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The novel 2-dimensional Bi2MoO6-Bi2O3-Ag3PO4 ternary photocatalyst with n-n-p heterojunction for enhanced degradation performance
No full textThe ternary Bi2MoO6-Bi2O3-Ag3PO4 photocatalysts were fabricated via hydrothermal and precipitation methods. Various characterizations proved that the Bi2O3 nanodots and spherical Ag(3)PO(4 )particles were embedded on Bi2MoO6 nanoflakes to form the ternary heterojunction. Compared to single Bi2O3, Bi2MoO6 and the binary Bi2MoO6-Bi2O3, the ternary composites at optimum Ag3PO4 content possess a significantly high visible-light degradation rate of tetracycline which is 3.2, 4.3 and 1.9 fold that of Bi2MoO6, Bi2O3 and Bi2MoO6-Bi2O3, respectively. The enhanced photocatalytic performance is attributed to the formation of ternary heterojunction that could greatly promote the transfer and separation of photo-generated carriers and extend the visible-light response range. The superoxide radical (center dot O-2(-)) played a key role in the photo catalytic process and the photocatalytic mechanism of the ternary n-n-p heterojunctions were proposed. This work could offer a new insight in manufacturing ternary photocatalysts for the degradation of tetracycline under visible light irradiation. (C) 2022 Elsevier B.V. All rights reserved
The novel 2-dimensional Bi2MoO6-Bi2O3-Ag3PO4 ternary photocatalyst with n-n-p heterojunction for enhanced degradation performance
No full textThe ternary Bi2MoO6-Bi2O3-Ag3PO4 photocatalysts were fabricated via hydrothermal and precipitation methods. Various characterizations proved that the Bi2O3 nanodots and spherical Ag(3)PO(4 )particles were embedded on Bi2MoO6 nanoflakes to form the ternary heterojunction. Compared to single Bi2O3, Bi2MoO6 and the binary Bi2MoO6-Bi2O3, the ternary composites at optimum Ag3PO4 content possess a significantly high visible-light degradation rate of tetracycline which is 3.2, 4.3 and 1.9 fold that of Bi2MoO6, Bi2O3 and Bi2MoO6-Bi2O3, respectively. The enhanced photocatalytic performance is attributed to the formation of ternary heterojunction that could greatly promote the transfer and separation of photo-generated carriers and extend the visible-light response range. The superoxide radical (center dot O-2(-)) played a key role in the photo catalytic process and the photocatalytic mechanism of the ternary n-n-p heterojunctions were proposed. This work could offer a new insight in manufacturing ternary photocatalysts for the degradation of tetracycline under visible light irradiation. (C) 2022 Elsevier B.V. All rights reserved
Open Research Fund of State Key Laboratory of Multiphase Complex Systems[MPCS-2021-D-10]
No full textResearch on the degradation behaviors of wood pulp cellulose in ionic liquids
No full textUtilizing phosphate-based ionic liquids (ILs) solvents for dissolving cellulose to prepare cellulose fibers has attracted much attention for its convenience, high yield, stability and sustainability. However, the degradation behavior during dissolving of cellulose in ILs, which is an important factor for fabricating cellulose fiber, is still unclear. In this work, the degradation of wood pulped cellulose (WPC) in three kinds of phosphate-based ILs: 1-ethyl-3-methylimidazolium dimethyl phosphate ([Emim]DMP), 1-ethyl-3methylimidazolium diethyl phosphate ([Emim]DEP) and 1-butyl-3-ethylimidazolium diethyl phosphate ([Beim]DEP), were systematically investigated at different dissolution temperatures and dissolution times. The results indicated that the degradation degree of WPC in three ILs follows the order of [Emim]DEP > [Beim]DEP > [Emim]DMP, which is consistent with interaction results obtained by quantum chemical calculation, and degradation degree increases follows the rising of dissolution temperature and the accumulation of dissolution time. Moreover, no reducing sugar (RS) was found in any recycled ILs even when the degree of polymerization (DP) of regenerated cellulose (RC) decreased by 30.4%. In addition, according to the Fourier transform infrared and X-ray diffraction data, the results further proved that the crystallization type of RC changed from type I to type II. Here, preferable dissolving parameters and experiments data of multiple conditions are provided, which may provide practical reference and guidance for both scientific research and industrial.(c) 2022 Elsevier B.V. All rights reserved
Preparation of Ni-P-Ti3C2Tx-Ce composite coating with enhanced wear resistance and electrochemical corrosion behavior on the surface of low manganese steel
No full textTi3C2Tx, as a promising material, has attracted extensive attention due to its excellent properties. At the same time, Ce3+ is also a very effective corrosion inhibitor, which can play huge roles in anticorrosion. In this study, Ti3C2Tx-Ce powders were synthesized successfully by doping Ce3+ into Ti(3)C(2)T(x )powders through a simple reaction. In addition, the Ni-P-Ti3C2Tx-Ce composite coating was synthesized by adding Ti3C2Tx-Ce particles into the Ni-P coating via an electrodeposition technique. Meanwhile, wear resistance performance studies have shown the coefficient of friction (COF) of the Ni-P-Ti3C2Tx-Ce composite coating is about 0.10, which is much lower than that of the Ni-P coating. The wear amount of Ni-P-Ti3C2Tx-Ce composite coating is only about 0.60 mg after 5 min of dry grinding under a load of 5 N and a radius of 5 mm. The microhardness of this composite coating has also been greatly improved, up to 3200 kg.mm(-2.) Furthermore, electrochemical corrosion behavior studies have shown the corrosion resistance (Rp) of the Ni-P-Ti3C2Tx-Ce composite coating is 120 times higher than that of the Ni-P coating, and 19 times higher than that of the Ni-P-Ti(3)C(2)T(x )composite coating. The corrosion current of Ni-P-Ti3C2Tx-Ce composite coating is 3 orders of magnitude lower than that of Ni-P coating. Therefore, Ni-P-Ti3C2Tx-Ce coating is a promising material for device surface protection
