JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Ruisen Jing,Junshan Yang,Shutao Li,Shifeng Zhao,Pengfei Wang,Yunyan Liu,Aiju Liu,Zilin Meng,Hongwei Huang,Zhilei Zhang,Qian Zhang
The use of black phosphorus (BP) nanosheets has attracted much attention in the area of photocatalysis owing to the thickness-tunable bandgap and high carrier mobility. In order to improve the stability of BP nanosheets, poly dimethyldiallyl ammonium chloride (PDDA) is used to passivate the BP nanosheets and change its surface properties. The present study concerns the development of a facile electrostatic assembly method for the construction of a Z-scheme system consisting of PDDA-functionalized BP nanosheets and layered BiOI in order to enhance visible light adsorption and promote electron-hole separation. The morphology, structure and photoelectrochemical properties of the composites are thoroughly characterized and the photocatalytic performances of all the samples were assessed under visible light irradiation. The 5-F-BP/BiOI exhibits excellent photocatalytic activity with removal efficiencies of 97.6% and 90.0% for methylene blue (MB) and tetracycline (TC), respectively. Superoxide radicals (·O 2 – ) were found to be the main organic decomposition products according to species trapping experiments. The photocatalyst presents favorable stability after three catalytic cycles. This study provides new insights into the design of highly efficient Z-scheme photocatalysts based on functionalized BP nanosheets in order to meet environmental demands.
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JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Wei Cai,Tongmin Cai,Lingxin He,Fukai Chu,Xiaowei Mu,Longfei Han,Yuan Hu,Bibo Wang,Weizhao Hu
Herein, as a natural antioxidant, tannin (TA) is firstly used to functionalize black phosphorous (BP) nanosheets to improve the ambient stability and toxic suppression, thus decreasing the fire hazards of polymer materials. Compared to pure BP nanosheets, higher temperature for thermal oxidation decomposition is achieved for TA-BP nanosheets, directly confirming the ambient stability of TA-BP nanosheets. Meanwhile, from high resolution TEM and XPS results, TA-BP nanosheets after being exposed at air for 10 days present well-organized crystal structure and low PO x bonds content. Cone calorimeter results illustrate that the incorporation of 2.0 wt% TA-BP nanosheets significantly decreases the peak value of heat release rate (−56.5 %), total heat release (−43.0 %), CO 2 concentration (−57.3 %) of TPU composite. Meanwhile, with addition of low to 1.5 wt%, the release of highly-toxic CO gas is significantly suppressed, confirmed by lower peak value (0.52 mg/m 3 ) and decreased total release amount (−55.1 %). The obviously enlarged tensile strength (36.7 MPa) and desirable elongation at break (622 %) are also observed. This strategy not only firstly adopts bio-based antioxidant to impart excellent environmental stability for BP nanosheets, but also promotes the promising potentials of BP nanosheets in the fire safety application of polymer composites.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Wei Cai,Yixin Hu,Ying Pan,Xia Zhou,Fukai Chu,Longfei Han,Xiaowei Mu,Zeyuan Zhuang,Xin Wang,Weiyi Xing
As one of emerging layered nanomaterials, the potential of black phosphorous nanosheets (BP) for fabricating high performance polymer composites was seriously confined by incompatible interface. Herein, interfacial engineering between BP nanosheets and polyurethane (PU) matrix was rationally designed, where employing polymerized ionic liquid as linking bridge between robust BP nanosheets and soft TPU. The ionic liquid (IL) was firstly confined onto the surface of BP nanosheets with the combination of electrostatic-driving self-assembly process and in situ radical polymerization was then performed. The successful preparation of IL-functionalized BP (IL-BP) nanosheets was confirmed by a series of analytic methods, incluing TEM, XPS, FTIR, and so on. The resultant IL-BP nanosheets imparted well mechanical performance and flame retardancy to TPU composites. Compared to the mechanical enhancement reported by other literatures, the break strength of TPU/IL-BP-1.0 was significantly increased by 50%, attributing to strong interfacial regulation of polymerized IL and mechanically robust BP nanosheets, generated by the similar polarity. Meanwhile, significant decreases of 38.2% and 19.7% in peak values of heat release rate and total heat release were achieved for TPU/IL-BP-2.0. With the investigation of combustion residue and pyrolysis products, it was found that a mass of pyrolysis products reacted with IL-BP nanosheets to form mechanically robust protective char and solid products, being no longer used as fuel to support combustion. Meanwhile, the maximum concentration of CO 2 and highly toxic CO of TPU/IL-BP-2.0 were effectively decreased by 36.9% and 26.5%, compared to the pure TPU. Such a design route effectively regulates the interfacial interaction between BP nanosheets and polymer matrix and offers a practical route for preparing high performance materials.
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Journal of Water Process Engineering
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2022
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IF 7.34
Zhuang He,Yunqiu Zhang,Jiapei Lv,Shuxing Zhou,Jianrui Niu,Zaixing Li,Xinzhong Wang,Thomas Wågberg,Guangzhi Hu
In the present work, a microwave-assisted and secondary roasting preparation process was used to synthesize nanocomposite materials. These materials were modified with amorphous cobalt nanoparticles (Co NPs) on the surface of biochar doped with different nitrogen sources (melamine (Me), 1,10-phenanthroline (Ph), and urea (Ur)). The nanocomposite (Co-N-C(Ur)) with urea as the nitrogen source promoted the generation of mesopores on the surface of carbon materials due to its evaporation during the preparation process thus enhancing the attachment sites of cobalt nanoparticles. The Co-N-C(Ur) had a more significant degradation effect on the primary carcinogen sulfamethazine (SMT) by activating peroxymonosulfate (PMS). The degradation rate of SMT pollutants was 96.6 % within 30 min. The optimal reaction conditions were as follows: catalyst dosage of 0.4 g L −1 , PMS dosage of 0.812 mM, SMT concentration of 10 mg L −1 , and pH of 5.67. Additionally, the Co-N-C(Ur) catalysts possess excellent specific surface area due to the evaporation effect of the calcination process of urea itself compared to other nitrogen source doping. Electrochemical tests revealed that the composites prepared with urea as the nitrogen source had higher PMS-induced current density and lowered material impedance values, which effectively promoted the catalytic performance of SMT degradation. Concurrently, the Co-N-C (Ur) + PMS reaction system exhibited excellent catalytic performance against other antibiotic organic pollutants. Subsequently, through the capture experiments and electron paramagnetic resonance technical analyses, it was determined that the singlet 1 O 2 played a leading role in the reaction system. Finally, a thorough liquid chromatography-mass spectrometry analysis suggested the possible SMT degradation pathways, thereby providing a new strategy for the subsequent heterogeneous catalysts to degrade persistent organic pollutants.
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CHEMICAL ENGINEERING SCIENCE
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2022
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IF 4.889
Rong Wang,Hongming Sun,Mengxin Liang,Hongwei Zhang,Qingyan Cui,Tinghai Wang,Pei Yuan
The catalytic hydrogenation of petroleum resin (PR) to high value-added hydrogenated PR (HPR) represents a forward-looking technology for upgrading the pyrolysis petroleum by-product. Herein, flower-like and pure-phase supported nickel phosphide catalysts were controllably fabricated through a hydrotalcite strategy with red phosphorous as the P source. The PR hydrogenation activity of the catalysts followed the order of Ni 2 P/Al 2 O 3 > NiP 2 /Al 2 O 3 > Ni/Al 2 O 3 > imp-Ni 2 P/Al 2 O 3 catalysts (prepared by the impregnation method). Such enhanced performance of Ni 2 P/Al 2 O 3 could be ascribed to small nickel phosphide particle size and rich active Ni δ+ species. Notably, the sulfur contents of PR were effectively reduced from 55.4 (C 5 PR) and 72.3 ppm (C 9 PR) to 3.8 and 7.9 ppm after hydrogenation by Ni 2 P/Al 2 O 3 . Meanwhile, Ni 2 P/Al 2 O 3 also exhibited good stability with the hydrogenation degree of HC 5 PR maintaining at 94.39 % after 100 h. Our work provides a promising nickel phosphide catalyst with outstanding hydrogenation activity, hydrodesulfurization ability, and stability toward PR hydrogenation.
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INORGANIC CHEMISTRY
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2022
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IF 5.436
Shan Jiang,Xuemei Jia,Jing Cao,Haili Lin,Fang Li,Yue Sun,Shifu Chen
Photocatalytic overall water splitting simultaneously generates O2 and H2; this is a potential strategy to solve the energy shortage problem. Elemental phosphorus (RP) displays ultralow visible light performance for O2 and H2 generation; thus, a novel α-Fe2O3/RP composite is designed and prepared by a low-temperature hydrothermal method via loading a trace amount of α-Fe2O3. In the experiment, the 1.5% α-Fe2O3/RP composite showed the best overall water splitting performance, which is 6.9 times that of bare RP. Through various characterization studies, the recombination rate of charges is significantly reduced. It is largely ascribed to the matched energy band structure of the two photocatalysts and the interface contact between α-Fe2O3 and RP, which efficiently separates the photocarriers through an S-scheme mode and realizes the obvious enhancement of overall water splitting performance. Moreover, α-Fe2O3/RP maintains high activity when it is persistently irradiated for 15 cycles. The research provides insight into the exploitation of low-cost, high-activity, and stable RP-based photocatalysts to achieve visible light induced overall water splitting activity to generate O2 and H2.
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Surfaces and Interfaces
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2023
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IF 6.2
Jing Xu,Qian Li,Xinyu Liu,Qian Yang
S-type heterojunction is a new type of photocatalytic heterojunction that can efficiently enhance the performance of photocatalytic hydrogen-producing. In this paper, NiAl-LDH/P-MoO 3 composite catalysts were prepared, NiAl-LDH, P-MoO 3 and NiAl-LDH/P-MoO 3 were characterized, tested and analyzed from the aspects of morphology, structure and spectrum. The 5 h hydrogen-producing amount of NiAl-LDH/P-MoO 3 reaches 298.72 μmol, which is 160 times and 16 times that of MoO 3 and NiAl-LDH under the visible light , respectively. The doping of P narrows the band gap of MoO 3 and is more helpful to the electronic transmission. The irregular P-MoO 3 nanorods with a diameter of about 200 nm are attached to 3-4 μml NiAl-LDH nanoflower . The construction of S-type heterojunction changes the electronic transmission pathway of NiAl-LDH/P-MoO 3 while improving the electron-hole pair separation ratio of NiAl-LDH/P-MoO 3 . The strong oxidizing ability of P-MoO 3 and the strong reducing ability of NiAl-LDH are retained. Effective control of electronic transmission path improves the photocatalytic hydrogen-producing activity and stability of NiAl-LDH/P-MoO 3 , which provides a certain theoretical support for the realization of photocatalytic high-efficiency HER by constructing heterojunction.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Hongyan Zhang,Tao Yang,Hao Zhou,Yikai Wang,Xuehan Yang,Wenjie Liang,Dan Wu,Pan Yuan,Tingting Yu,Maoshuai He,Wenxian Wei
Ni phosphides have recently attracted considerable attention as promising catalysts for the oxygen evolution reaction (OER) and are generally promoted by Fe incorporation. However, the catalytic performance of nickel phosphide still does not meet the desired expectations. Additionally, the catalytic activity of iron (Fe) is insignificant and can be disregarded. In this study, we used C 3 N 4 as a carbon substrate to modulate the 3 d electron configurations and adsorption properties of Ni and Fe. Density functional theory (DFT) analysis reveals that the catalytic performance of Ni sites can be enhanced by utilizing the C 3 N 4 substrate. Surprisingly, the Fe sites can also be activated to catalyze OER through a direct O 2 mechanism and the catalytic activity of Fe is found to surpass that of Ni. As a result, the FeNi-C 3 N 4 -P catalyst demonstrated remarkable catalytic performance for OER. It exhibited a Tafel slope of 40.4 mV dec −1 , an overpotential of 235 mV at 100 mA cm −2 , and exhibited exceptional stability. This study highlights the activation of Fe and the enhancement of Ni by utilizing nitrogen-containing carbon substrates. This strategy offers promising prospects for the development of efficient Ni/Fe-based OER catalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Wenbo Si,Jilu Yang,Yuping Cao,Wenwu Qin
The covalent organic frameworks (COFs) have emerged as potential photocatalysts for solar-driven hydrogen evolution , but the disadvantage that photogenerated electrons and holes are prone to recombination limits their applications. Here, a rGO/BP/TpPa-1 high-low heterojunction with electron acceptors was prepared by integrating reduced graphene oxide (rGO) and black phosphorus (BP) into COF TpPa-1 to reduce the recombination rate of photoinduced charge carriers. The photocatalytic hydrogen evolution rate reached 18.09 mmol h −1 g −1 , about 3.3 times higher than pure TpPa-1. Here, a two-step photogenerated electron transfer mechanism is proposed. Firstly, a high-low heterojunction is formed between TpPa-1 and BP through an internal electric field from BP to TpPa-1, facilitating photogenerated electrons transfer from TpPa-1 to BP, then rGO attached to the BP surface acts as an electron acceptor, further collecting photogenerated electrons for reaction. This work provides a novel strategy for synthetizing efficient COF-based photocatalysts.
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SURFACE & COATINGS TECHNOLOGY
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2023
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IF 5.4
Yuan Gao,Chen Shu,Shengliang Zhao,Wei Wang
Poly-ether-ether-ketone (PEEK) has many excellent properties for being used as self-lubricating coatings. In order to further improve the friction performance, black phosphorus (BP) was used as filler to prepare BP/PEEK composite coating . BP-C 60 was formed by modification of BP edge by fullerene C 60 to solve the problem of BP oxidation , so that BP still existed in the sintered PEEK coating. Then, the effects of C 60 and BP-C 60 on the tribological properties of PEEK coating were studied, and the results showed that the wear rate and friction coefficient of BP-C 60 /C 60 /PEEK composite coating were significantly reduced. This was attributed to the synergistic effect of BP and C 60 , which enhanced the stability of BP and reduced coating porosity.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yang Zhao,Yanli Gong,Chunming Gao,Zexiang Chen,Caijun Zheng,Huifang Lv,Hualiang Wei,Zhiyu Zhou,Yan Wang
Monofunctional host materials of lithium-sulfur (Li-S) batteries are inadequate to simultaneously address the complex issues including “shuttle effect” and sluggish redox kinetics. Herein, iron and manganese bimetallic phosphorus trisulfide (Fe-MnP 2 S 6 ) with heterointerfaces and a semi-open frame structure was synthesized as a multifunctional host material for Li-S batteries. Theoretical calculations suggest that due to the strong electronic coupling effect, electrons migrate from the MnPS 3 layer to the FePS 3 layer, accelerating charge and ion transfer on the surface of FePS 3 . The d-band center of metal atoms shifts towards the Fermi level through the introduction of Mn 2 P 2 S 6 , enhancing the interaction with polysulfides . Moreover, the frame exhibits excellent structural stability and physical limiting ability of sulfur. As a result, the cell with Fe-MnP 2 S 6 delivers impressive electrochemical performance and redox kinetics, including a capacity of 1388 mAh/g at 0.2C, a rate performance of 850 mAh/g at 4C and a capacity attenuation rate of 0.028 % per cycle over 1,000 cycles at 1C. Through meticulous structural design and optimal composition adjustments, our work explores the mechanism of metal phosphorus trisulfides (MPS 3 ) in Li-S batteries.
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Nano Research
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2023
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IF 9.9
Chen Yan,Yang Zhenrui,Wang Juan,Yang Yun,He Xuedong,Wang Yang,Chen Jiadong,Guo Yaqing,Wang Xin,Wang Shun,Jin Huile
Enhancing catalytic activity through modulating the interaction between N-doped carbon and metal phosphides clusters is an effective approach. Herein, the electronic structure modulation of CoP 2 supported N-modified carbon (CoP 2 /NC) has been designed and prepared as efficient electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). Notably, CoP 2 /NC-1 catalyst exhibits impressive performance in alkaline media, with an ORR half-wave potential of 0.84 V, as well as OER and HER overpotentials of 290 and 129 mV (at 10 mA·cm −2 ), respectively. In addition, CoP 2 /NC-1 produces a power density as high as 172.9 mW·cm −2 , and excellent reversibility of 100 h at 20 mA·cm −2 in home-made Zn-air batteries. The experimental results demonstrate that the synergistic interactions between N modified carbon substrate and CoP 2 material significantly enhance the kinetics of ORR, OER, and HER. Density functional theory (DFT) calculations reveal the strong electrons redistribution of CoP 2 induced by high-density N atoms at the interface, thus optimizing the key intermediates and significantly lower the energy barrier of reactions. These electronic adjustments of CoP 2 greatly enhance its kinetics of ORR/OER/HER, leading to faster reactions. This study provides profound insights into the specific modification of CoP 2 by N-doped carbon, enabling the construction of efficient catalysts.
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