NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 44
·21078-21084
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IF 3.925
Xing-Liang Yin,Lei-Lei Li,Yan-Lan Wang
An efficient and stable CdS@MoS2 core@shell heterostructure was prepared by using a facile solvothermal approach. The MoS2@CdS heterostructure reveals efficient charge separation, giving rise to excellent performance on H2 generation from photocatalytic lactic acid decomposition. Thanks to the MoS2 shell protection, CdS corrosion was significantly prohibited, thus resulting in the long-term photocatalytic stability of the CdS@MoS2 heterostructure. The corresponding charge transfer properties and catalytic mechanism have been analyzed and discussed in detail. The present study provides a novel insight into the design of high performance and cost-effective photocatalysts.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Yaokun Fu,Lu Zhang,Yuan Li,Sanyang Guo,Zhichao Yu,Wenfeng Wang,Kailiang Ren,Qiuming Peng,Shumin Han
The introduction of the heterogeneous catalysts with high activity can significantly improve hydrogen storage performance of MgH 2 , therefore, in this paper, we synthesize a carbon-supported transition metal compound, FeCoS@C derivative from ZIF-67, by utilizing the in situ formed C dispersive multiphase Mg 2 Co, α-Fe, Co 3 Fe 7 , and MgS to implement catalysis to MgH 2 . Noteworthily, MgH 2 -FeCoS@C rapidly absorbs 6.78 wt% H 2 within 60 s at 573 K and can also absorb 4.56 wt% H 2 in 900 s at 473 K. Besides, the addition of FeCoS@C results in decreasing of the initial dehydrogenation temperatures of MgH 2 from 620 to 550 K. The dehydrogenation activation energy of MgH 2 decreases from 160.7 to 91.9 kJ mol –1 . Studies show that the Mg 2 Co, α-Fe, and Co 3 Fe 7 act as “hydrogen channels” to accelerate hydrogen transfer due to the presence of transition metals, and MgS with excellent catalytic effect formed from MgH 2 -FeCoS@C provides a strong and stable catalytic effect. Besides, the carbon skeleton obtained by the carbonization of ZIF-67 not only serves as a dispersion for the multiphase catalytic system, but also provides more active sites for the catalysts. Our study shows that the multiphase and multiscale catalytic system provides an effective strategy for improving the hydrogen storage performance of MgH 2 .
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高影响因子
CARBON
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2022
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IF 11.307
Zhuohan Chen,Xiaojing Su,Wenjian Wu,Jiale Zhou,Tao Wu,Yunhui Wu,Huali Xie,Kunquan Li
Recently, the membrane separation materials show promising applications in the fields of crude oil removal because of their low energy consumption and less secondary pollution. However, the membrane separation materials suffer problem of low separation efficiency due to the high viscosity of crude oil. Here, a superhydrophobic material with Joule heat and photothermal effect was prepared by decorating the delignified wood with reduced graphene oxide (GSH) and vinyl terminated polydimethylsiloxane (V-PDMS) through thiol-ene click reaction. The prepared PDMS@GSH wood exhibited stable superhydrophobicity with a water contact angle of 156°. Meanwhile, the GSH layer provided promising electrothermal effect that endowed the PDMS@GSH wood with excellent crude oil/water separation capability under the Joule heat with a surface temperature of 139 °C and separation rate of 1.78 × 10 5 kg m −3 h −1 . Besides, the PDMS@GSH wood displayed a good photothermal effect that assisted with the Joule heat to heat the wood for crude oil removal to save energy. More importantly, the PDMS was crosslinked with GSH on the wood via thiol-ene click reaction, leading to the stable superhydrophobicity and electrical conductivity in strong acid or alkali environment. This material has broad application prospects in crude oil clean-up due to its high separation speed and easy large-scale production.
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EUROPEAN POLYMER JOURNAL
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2022
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IF 5.546
Pengfei Yan,Mengya Li,Jie Liu,Lingfei Song,Keyong Tang
Hydrogel is an ideal biomedical material because of its 3D network structure. However, their applications are greatly limited due to their poor mechanical strength and antibacterial property. Herein, a physically cross-linked and light-responsive poly(vinyl alcohol) (PVA) hydrogel embedded with quaternized chitosan-coated molybdenum disulfide (QCS-MoS 2 ) nanomaterials was successfully prepared. The photothermal performance of QCS-MoS 2 was studied with the results that QCS-MoS 2 could be employed as a superior photothermal agent for light responsive hydrogels. After being incorporated with QCS-MoS 2 , a hydrogen bonding network could be formed in the hydrogel matrix, significantly increasing the mechanical properties. Moreover, the hybrid hydrogels exhibited excellent antibacterial properties. 95.6 % of Staphylococcus aureus ( S. aureus ) and 98.8 % of Escherichia coli ( E. coli ) were killed in 15 min due to the synergistic effects of the high temperature and the reactive oxygen species (ROS) generated by the irradiation of 808 nm near-infrared (NIR) light. No cytotoxicity was found by the introduction of QCS-MoS 2 , suggesting a great potential in photothermal antibacterial application for biomedical materials.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Mengjia Wu,Junhua Di,Lei Gong,Yu-Cai He,Cuiluan Ma,Yu Deng
Adipic acid is an important precursor for manufacturing Nylon-66, and various efficient renewable routes for adipic acid from lignocellulosic biomass are being explored. To effectively valorize biomass into adipic acid, a novel aqueous solution NaOH/ChCl:TH/water (6:24:160, wt/wt/wt) was firstly applied to pretreat sugarcane bagasse (SCB) at a room temperature (25 °C) for a short pretreatment time (1 min) for improving its saccharification efficiency. A deep eutectic solvent ChCl:TH was synthesized by mixing choline chloride (ChCl) and thiourea (TH). The cellulose structure changes of SCB were characterized by FTIR, XRD, SEM, TEM and LSCM. Composition analysis and reducing sugar yield were used to evaluate pretreatment efficiency. Hydrolysis for 72 h, the yields of reducing sugars and glucose from 40 g/L NaOH/ChCl:TH-SCB with complexed cellulases were obtained at 90.2 % and 94.1 %, respectively. Finally, the obtained SCB-hydrolysate was used for adipic acid production by E. coli MG1655 K12. Glucose in SCB-hydrolysate was consumed within 72 h, with a productivity of 0.39 g adipic acid/g glucose, accounting for 72.2 % of the theoretical yield. Further discovery, xylose in SCB-hydrolysate was also consumed for adipic acid fermentation, which contributed to an increase in adipic acid production. In view of transcriptome data, most of the genes involved in carbohydrate metabolism were most significantly up-regulated, which was conductive to improve the yield of adipic acid using biomass-hydrolysate as carbon source. Therefore, the NaOH/ChCl:TH-SCB hydrolysates were a better carbon source for adipic acid fermentation compared to commercial glucose. Obviously, this established rapid room temperature pretreatment with NaOH/ChCl:TH was proven to be effective for enhancing saccharification efficiency of SCB, and the hydrolysates had excellent adipic acid fermentability.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Qicheng Zhang,Yue Song,Bin Chen,Xuewen Hu,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Two-dimensional (2D) materials have unique planar structures and ultrathin thicknesses, but are prone to restacking and agglomerate due to the high surface energy. Building hierarchical structures is one of the effective ways to exploit their inherent properties and unique structural advantages. We unexpectedly found that the introduction of saturated NaCl solution to the hydrothermal synthesis of MoS 2 could significantly change its structure, resulting in the hierarchically structured nanosheet-assembled MoS 2 nanorods (R-MoS 2 ) with intercalated alkali ions. The formation process and synthesis mechanism of R-MoS 2 via NaNH 4 Mo 3 O 10 ·H 2 O reaction intermediate are systematically revealed by morphology and spectroscopy. Benefiting from this interesting hierarchical structure, the catalytic conversion of R-MoS 2 for p -chloronitrobenzene hydrogenation is significantly improved. Density functional theory calculation also demonstrates the intercalation of Na in MoS 2 can downshift the d -band center of Mo and favors the key final desorption process.
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Advanced Energy Materials
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2022
·Vol. 13
·期 1
·2202913
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IF 29.698
Dan-Qing Liu,Zhouxin Luo,Bingxing Zhang,Guoqiang Zhao,Wei Guo,Jian Chen,Mingxia Gao,Yongfeng Liu,Hongge Pan,Wenping Sun
The sluggish kinetics of hydrogen oxidation reaction (HOR) is one of the critical challenges for anion exchange membrane fuel cells. Here, we report epitaxial growth of Ir nanoclusters (<2 nm) on a MoS 2 surface (Ir/MoS 2 ) and optimize the alkaline HOR activity via tailoring interfacial charge transfer between Ir clusters and MoS 2 . The electron transfer from MoS 2 to Ir clusters can effectively prevent the oxidation of Ir clusters, which is not the case for carbon-supported Ir nanoclusters (Ir/C) synthesized using the same method. Moreover, the HOR performance of the Ir/MoS 2 can be further optimized by tuning the hydrogen binding energy (HBE) via a precise annealing treatment. A substantial exchange current density of 1.28 mA cm ECSA −2 is achieved in the alkaline medium, which is ∼10 times over that of Ir/C. The HOR mass-specific activity of Ir/MoS 2 heterostructure is as high as 182 mA mg Ir −1 . The experimental results and density functional theory calculations reveal that the significant improved HOR activity is attributed to the decreased HBE, which highlights epitaxial growth is an effective way for boosting catalytic activity of heterostructured catalysts.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Meng Li,Jingxue Sun,Xin Zhou,Huaisuo Yao,Bowen Cong,Yingxuan Li,Gang Chen
The introduction of external magnetic field is one of the most widely studied strategies for photogenerated carrier separation in recent years. However, magnetic materials have great disadvantages in terms of photocatalytic performance. Semiconductor materials with magnetic properties are also extremely rare. It is extremely peculiar to research the magnetism of semiconductor photocatalyst triggered by vacancy. Here, the first example of ferromagnetic Bi 2 S 3 is achieved by controlled Bi vacancy (Bi 2 S 3 -V Bi ). The magnetism properties depends largely on the spin polarization of p electrons in S atoms, and its magnetic moment is mainly distributed on S atoms around cation vacancies. Under the induction of external magnetic field, the tunneling of spin-polarized electrons in S-2p orbital makes Bi 2 S 3 -V Bi have negative magnetoresistance effect. The ferromagnetic arrangement of Bi 2 S 3 -V Bi particles can reduce the resistivity and increase the tunneling of electrons. Meanwhile, Lorentz force generated by external magnetic field acts reversely on photogenerated electrons and holes, thus effectively inhibiting the recombination of carriers in photocatalyst. Moreover, the influence of Bi vacancy on Bi 2 S 3 magnetism is investigated by DFT calculation. This study provides a new strategy for effective carrier separation in photocatalysis .
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APPLIED SURFACE SCIENCE
·
2022
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IF 7.392
Xiaobin Dong,Han Wang,Xiaolong Li,Pedram Fatehi,Shoujuan Wang,Qin Wu,Keyin Liu,Fangong Kong
Graphitic carbon nitride is a very potential photocatalytic catalyst for H 2 production, but its practical application is seriously limited by the fast recombination of photogenerated carriers and insufficient utilization of surface charge. In order to solve these problems, herein, a series of g-C 3 N 4 -NiO-NiS x photocatalysts were synthesized by first calcining the precursor to load NiO on g-C 3 N 4 and subsequently partial sulfidation of NiO into NiS x in situ via a hydrothermal process. Under the irradiation of visible light, the photocatalytic H 2 production rate of g-C 3 N 4 -NiO-0.4T can be up to 1248.1 μmol·g −1 ·h −1 using triethanolamine as sacrificial agent. In addition, recycling test also confirmed g-C 3 N 4 -NiO-0.4T has excellent photostability. It is believed that the formation of p-n junction between NiO and g-C 3 N 4 and the presence of NiS x promote the spatially fast separation of photogenerated carriers, while the abundant interface of NiS 2 and NiS also leads to the good proton trapping ability. These two factors jointly determine the efficient H 2 production of the composite photocatalysts. Furthermore, the detailed energy band structure and plausible photocatalytic mechanism of g-C 3 N 4 -NiO-NiS x are also proposed. This work can offer a new route and useful reference for the design and research of high efficiency composite photocatalysts for H 2 production.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Gaimei Gao,Guang Yang,Mingyu Dou,Shirong Kang,Xingliang Yin,Hua Yang,Wenning Yang,Dacheng Li,Jianmin Dou
The development of excellent photocatalysts for hydrogen evolution is of great significance to solving the global energy crisis. In this work, a novel 3D hierarchical CdS/NiAl-LDH photocatalyst was fabricated by a facile electrostatic assembly strategy, which was composed of 1D CdS nanorods and 3D flower-like NiAl-LDH microspheres . Under the visible irradiation, the CNA-20 hierarchical photocatalyst presents the optimum hydrogen evolution rate achieved to 3.24 mmol g −1 h −1 , which is improved 6.23-fold in comparison with the pure CdS. Through the analysis of energy band structures and first-principles calculation, the type-Ⅱ charge transfer mechanism was proposed. Driven by the built-in electric field, as well as the effect of intimate interface contact of CdS and NiAl-LDH, the photogenerated charge could be achieved rapidly separate and migrate, which effectively promotes the H 2 evolution. This well-designed synergistic 1D/3D interface interaction and provides an economic approach to rationally developing metal-free photocatalysts for hydrogen production .
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Hongrui Zhu,Chun Zhang,Kefeng Xie,Xingang Li,Guangfu Liao
Defect engineering, exposed crystal facets, and Z-scheme mechanism are promising strategies to greatly promote photocatalytic performance. Herein, the ZnFe 2 O 4 (ZFO) with Ag-doping, oxygen vacancies and different exposed crystal facets was firstly prepared by a facile hydrothermal strategy. Subsequently, the MoS 2 flowers were in-situ grown on the surface of the prepared Ag-doping ZFO (Ag-ZFO) for fabricating MoS 2 /Ag-ZFO Z-scheme heterojunction by hydrothermal strategy. Due to the synergistic effects of defect engineering (Ag-doping and oxygen vacancies), exposed crystal facets, and Z-scheme mechanism, the photocatalytic activity for tetracycline degradation was evidently improved. More importantly, the prepared MoS 2 /Ag-ZFO (T) also show excellent photocatalytic performance under real environment water. This work offers a new insight for future design and development of highly active photocatalysts.
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Frontiers in Bioengineering and Biotechnology
·
2022
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IF 6.064
Ju Jian,Zhang Xinyu,Li Lin,Regmi Sagar,Yang Guoqiang,Tang Shixing
Understanding the dynamic changes in antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is essential for evaluating the effectiveness of the vaccine and the stage for the recovery of the COVID-19 disease. A rapid and accurate method for the detection of SARS-CoV-2-specific antibodies is still urgently needed. Here, we developed a novel fluorescent lateral flow immunoassay (LFA) platform for the detection of SARS-CoV-2-specific IgM and IgG by the aggregation-induced emission carbon dots conjugated with the SARS-CoV-2 spike protein (SSP). The aggregation-induced emission carbon dots (AIE-CDs) are one of the best prospect fluorescent probe materials for exhibiting high emission efficiency in both aggregate and solid states. The AIE-CDs were synthesized and displayed dual fluorescence emission, which provides a new perspective for the design of a high sensitivity testing system. In this work, the novel LFA platform adopted the AIE carbon dots, which are used to detect SARS-CoV-2-specific IgM and IgG conveniently. Furthermore, this sensor had a low LOD of 100 pg/ml. Therefore, this newly developed strategy has potential applications in the areas of public health for the advancement of clinical research.
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PubMed
高影响因子
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