FUEL
·
2023
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IF 7.4
Peng Wei,Xueping Sun,Zhimin He,Fangyuan Cheng,Jia Xu,Qing Li,Yurong Ren,Jianhua He,Jiantao Han,Yunhui Huang
Transition metal phosphides (TMPs) have emerged as the most potential non-precious metal catalysts thanks to their high abundance, low cost and superior catalytic activity. Although numerous efforts have been devoted to gain TMPs, most of the synthetic processes are dangerous and complex as the utilization of flammable and toxic phosphorus sources. By using a novel green phosphorus source-adenosine triphosphate (ATP), we synthesized various N, P doped carbon-sealed TMPs nanostructures (TMPs@NPC) via a facile and simple solid-phase method. Benefiting from the porous nanostructure and in situ derived heteroatom-doped carbon encapsulation, as-synthesized TMPs@NPC exhibit good bifunctional catalytic performance. Notably, the Co 2 P@NPC demonstrates the superior activity and durability toward HER and OER. The Co 2 P@NPC, meanwhile, displays robust overall water electrolysis performance. Therefore, our work presents a simple, ecofriendly, and general strategy for the synthesis of TMPs encapsulated with N, P-codoped carbon nanostructures, which are also expected to show a bright future in other electrochemical applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Luoming Zhang,Xin Zhao,Mingyang Liu,Qi Li,Yihang Yin,Xuena Ma,Huiquan Gu,Baojiang Jiang
Photocatalytic conversion of CO 2 to form value-added fuels is a promising strategy to simultaneously mitigate climate changes and achieve carbon neutral. Graphite carbon nitride (g-C 3 N 4 ) is one of the potential candidates for photocatalytic CO 2 reduction, but limited by its low specifical surface area and absence of active sites. Here, we design a thorn grown tubular g-C 3 N 4 (ThCN) with P sites by pyrolysis of supramolecular precursors prepared from melamine and hexachlorocyclo-triphosphonitrile (HCCP). ThCN offers an extraordinary photocatalytic activity in CO 2 conversion with a yield of 442.2 μmol g −1 (170.1 μmol g −1 for CH 4 and 272.1 μmol g −1 for CO) under AM 1.5G irradiation. The technique of in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) enables the identification of a series of key intermediates involved in the production of CO and CH 4 with high activity. Density functional theory (DFT) calculations reveal that ThCN with rich N-P-N sites reduce barrier energy from CO 2 to COOH* and CHO* intermediate, which is beneficial to subsequent reduction process to produce CO and CH 4 . This work provides a significant insight into regulating molecule structure and morphology of g-C 3 N 4 photocatalysts to promote the CO 2 conversion process.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Shuaibing Guo,Zhaokai He,Siyuan Ma,Zhe Jiang,Jia Dong,Jinbiao Jia
NiO x is one of the most promising inorganic hole transport materials for perovskite solar cells . However, lots of fabrication methods refer to NiO x are limited in n-i-p type perovskite solar cells. Because the deposition procedure of NiO x film such as polar solvents and high temperature process is seriously incompatible with perovskite light-absorption underlayers. In this work, highly crystalline NiO x nanocrystals are prepared using solvothermal method under the presence of long-chain oleylamine molecules. The resulted NiO x nanocrystals can be easily dispersed in weak-polar toluene and form films on perovskite layer without annealing procedure. The n-i-p type device with NiO x hole transport layer achieves an efficiency of 10.34%. Later, Mg 2+ with different molar ratios are incorporated into the NiO x nanocrystals. It is found that introducing a certain amount of Mg 2+ benefits to improve the ratio of Ni 3+ /Ni 2+ , thereby changing the work function and increasing the hole conductivity. As a result, the n-i-p type device with Mg-NiO x hole transport layer yields an improved efficiency of 12.41%.
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APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Chengming Wu,Ting Wu,Jifan Li,Chun-Ling Liu,Wen-Sheng Dong
A series of zirconium phosphates (ZrP- x ) with various P/Zr ratios were prepared. Among the catalysts, ZrP-2.5 with a high specific surface area of 410.9 m 2 ·g −1 and abundant mesopores exhibited outstanding catalytic performance in the synthesis of p -xylene (PX) from 2,5-dimethylfuran (DMF) and ethylene. A high PX yield of 89.2% and a productivity of 72.3 mmol PX ·g cat −1 ·h −1 were achieved at 250 °C using a small amount of catalyst. The excellent catalytic performance of ZrP-2.5 was attributed to the synergy between the large quantities of acidic sites with appropriate acid strength distribution, balanced Brønsted and Lewis acidity, and abundant mesopores . In addition, the catalyst had excellent recyclability and stability. In-situ FT-IR spectra of adsorbed DMF and ethylene revealed the crucial roles of P-OH and the coordinately unsaturated Zr(IV) in the adsorption and reaction process, which is beneficial to understanding the reaction mechanism and designing highly efficient catalysts.
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高影响因子
CATALYSIS LETTERS
·
2023
·
IF 2.8
Li Zezhong,Xu Jing,Liu Zhenlu,Liu Xinyu,Xu Shengming,Ma Yue,Li Qian,Shang Yan
The p–n type Sm 2 WO 6 -Co 9 S 8 heterojunction with two-dimensional coupling interface was successfully synthesized by electrostatic self-assembly. The unique rhombic morphology of Sm 2 WO 6 and Co 9 S 8 nanoparticles also effectively improve the light utilization efficiency. The intervention of Co 9 S 8 enhances the visible light absorption capacity of m 2 WO 6 /Co 9 S 8 . The Sm 2 WO 6 /Co 9 S 8 greatly increases the specific surface area and provides a rich reaction site. Recombination of photogenerated carriers in Sm 2 WO 6 /Co 9 S 8 heterojunctions is effectively inhibited. The p–n type Sm 2 WO 6 -Co 9 S 8 heterojunction results show that the optimized Sm 2 WO 6 /Co 9 S 8 heterojunction exhibits significant hydrogen evolution activity, and the optimal Sm 2 WO 6 /Co 9 S 8 -25 composite has 117.5 μmol hydrogen evolution activity, it’s close to four times Co 9 S 8 , close to 143 times Sm 2 WO 6 . The stability of the composite Sm 2 WO 6 /Co 9 S 8 is the better. Under the built-in electric field induced by p–n heterojunction, using of p–n heterojunction interactions and electron transport modes, the Sm 2 WO 6 /Co 9 S 8 can effectively achieve the remarkable effect of its internal carrier separation. This work also provides new opportunities for studying rare earth element tungstate photocatalysts. Graphical Abstract
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2022
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IF 3.841
Shuai Zhang,Xiaoyu Fan,Shuhan Jiang,Rentian Guan,Xiaodong Shao,Shuhao Wang,Qiaoli Yue
Trace moisture was firstly measured in methanol, ethanol and n-propanol at room temperature. The N, P-codoped carbon dots (CDs) were prepared by one pot solvothermal method, which displayed solvent-dependent fluorescence. The N, P-codoped CDs exhibited green fluorescence, with the quantum yields (QY) of 27.9%, 37.4%, 26.2% and 2.3% in methanol, ethanol, n-propanol and water, respectively. Based on the hydrogen bond interactions between the protic solvents and the N, P-codoped CDs, with the water content increased, the fluorescence intensity of N, P-codoped CDs gradually decreased in methanol, ethanol and n-propanol. The decrement in the fluorescence intensity is linearly related to the water content within the content range of 2% to 8%, 0.04% to 5% and 0.04% to 1.0%, with a limit of detection of 0.22%, 0.009% and 0.021% in methanol, ethanol and n-propanol, respectively. Therefore, the present system has a prospective value for the application in the determination of trace water in the relevant fields.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 5
·12138-12151
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IF 5.19
Kong Wenwen,Huang Suiliang,Shen Boxiong,Ekaterina Priakhina,Khatoon Zobia,Yun Huigwang
Single exposure toxicity tests of herbicides like prometryn are commonly applied in studying ecological and environmental issues, but they are more likely exposed to microalgae through multiple applications of irrigation and water flow. The toxicity of prometryn towards Microcystis aeruginosa ( M. aeruginosa ) at different growth stages (different exposure period) was determined by single and multiple exposures (different exposure mode) through 39-day batch-experiment comparison study. Inhibition rates showed that M. aeruginosa growth was greatly inhibited by exposure to prometryn in a final concentration of 80 and 160 μg·L −1 ( p < 0.05). Specifically, with the same prometryn exposure periods (lag or exponential phase) and concentrations, a single exposure displayed larger toxicity on M. aeruginosa than repetitive additions of prometryn in general according to inhibition rates. Moreover, with the same prometryn exposure modes and concentrations, inhibitory effect was higher with prometryn exposure in lag phase than that in exponential phase according to M. aeruginosa densities and inhibition rates. In general, variations of total dissolved phosphorus (TDP) and total dissolved nitrogen (TDN) with time responded negatively to M. aeruginosa growth, and added prometryn inhibits the utilization rate of both P and N. Logistic function was well used to describe algae densities ( R 2 = 0.979 ~ 0.995), growth rates ( R 2 = 0.515 ~ 0.731), specific growth rates ( R 2 = 0.301 ~ 0.648) and inhibition rates ( R 2 = 0.357 ~ 0.946) along with its combination with Monod function. In addition, results showed that shifts of limiting nutrients could be prompted by not only M. aeruginosa growth but also prometryn exposure scenarios. This study provides a basis for studying the potential harm of prometryn to the ecological environment.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
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IF 4.326
Changqing Miao,Zhiying Ma,Laigui Yu,Wenya Tang,Ginping Li,Gairong Chen,Mengbing Cui
Poly(p-methoxyphenol-phenylamine) (P(MOP-PA)), a binary copolymer of a phenol and an aromatic amine, was synthesized by liquid-phase copolymerization. The tribological properties and antioxidation behavior of the as-synthesized P(MOP-PA) in castor oil and soybean oil were investigated, and its antioxidation mechanism was discussed based on theoretical calculations. The results show that the introduction of P(MOP-PA) into the two kinds of base stocks improves their antioxidation performance at elevated temperatures and reduces friction and wear under pin-on-disk and four-ball sliding tests. In addition, the intramolecular coordination of P(MOP-PA) is responsible for the reduction in the activation energy of hydrogen atom transfer and the stabilization of nitrogen free radicals, which contributes to improving the antioxidation ability of P(MOP-PA).
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xie Li,Qiuru Bao,Kexuan Chen,Ren He,Yuan Liu,Qi Wang
The silicone thermoplastic elastomer is highly attractive in various areas for good mechanical strength and aging resistance. However, its intrinsically high flammability limits its practical applications. Meanwhile, as a typical polymer material, its irreversible cross-linking structure makes it difficult to recycle and reprocess; a great deal of discarded silicone materials can pose a waste of resources and environmental problems. Herein, it is of great significance to prepare an intrinsic flame retardant (FR) and reprocessable silicone polyurethane (STPU). In this study, we introduce phosphorus-containing compounds (MDP) and a dynamic phenylborate ester (HDPM) bond into traditional silicone’s molecular chain structure by in situ polymerization method, which endows the material with excellent flame retardance and reprocessing properties, respectively. The resulting STPU shows a limited oxygen index (LOI) value of 26.1% and reaches at VTM-0 rating. Furthermore, by regulating the decomposition and reconstruction of the phenylborate ester structure, STPU remain the initial tensile strength and keep 87.58% of tensile strain after twice reprocessing. This high-performance sustainable STPU materials hold great promise for fire safety behavior and reutilization in practical application.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Ping Han,Shugui Hua,Jiao Ji,Yun Wu,Long Ma,Huining Xu,Xiaoqin Sun,Sha Yu,Shuangli Chen,Jianmin Xiao,Yuan Dang
In this work, a novel trimetallic non-oxides CoFeMo-A (A=P, Se) with hierarchical porous structure are prepared as the OER electrocatalysts , which are derived from layered double hydroxide (LDH) using zeolitic imidazolate framework-67 (ZIF-67) as the precursor. The prepared CoFeMo-A (A=P, Se) show the rough, loose and hierarchical porous feature, which is beneficial to improve the mass transfer efficiency and the exposure of more active sites. Besides, the electronic configuration of the metals is tuned owing to the incorporation of P and Se and in return the kinetics of OER process is accelerated. Additionally, the LDH derived CoFeMo-A (A=P, Se) can be in situ transformed to the more reactive CoFeMo-oxyhydroxide during the OER process. Benefiting from the above-mentioned advantages, CoFeMo-A (A=P, Se) exhibit excellent electrocatalytic activity for OER with a low overpotential of 273 and 299 mV to achieve a current density of 10 mA cm −2 and the low Tafel slope of 31.2 and 39.5 mV dec −1 for CoFeMo-P and CoFeMo-Se, respectively. The slight difference in OER performance is mainly due to the different crystallinity and intrinsic activity. The work provides a promising strategy to improve the catalytic activity of electrocatalysts by preparing multi-metal non-oxides based on the MOF-derived LDH.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
·
IF 6.76
Xiaojuan Feng,Yanlong Shi,Jingmei Liang,Wei Li,Xuyuan Gou
Exploring high activity, stable and low-cost electrocatalysts are of great importance for high-efficient hydrogen production via water splitting. Herein, a cactus-like Fe, P co-doped CoNi-S array was constructed via facile hydrothermal reaction and subsequently sulfuration and phosphorization process. Benefiting from the strong synergistic effects of different components, high conductivity of bimetallic sulfide, 3D cactus-like architecture with rich channels for mass/charge transport, and Fe and P co-doping with electron structure regulation, the as-prepared Fe, P-NiCo 2 S 4 /NF presents superior electrocatalytic activity with low overpotentials of 139 and 290 mV to drive the current density of 10 and 40 mA cm −2 for HER and OER, respectively. Meanwhile, it also manifests the distinguished durability for over 60 h in alkaline media. Notably, when integrating in a two-electrode electrolytic cell with Fe, P-CoNi-S, a reduced operation voltage of 1.55 V is required to reach 10 mA cm −2 , which is superior to precious metal-based Pt/C/NF//RuO 2 /NF counterparts. Impressively, it can also be driven by sustainable solar and thermal energies motivated Stirling engine. This work offers a universal strategy for designing high-activity and durable electrocatalysts by dual doping heteroatoms and synergistic interface engineering.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 29
·23212-23223
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IF 2.779
Lu Yanjun,Sun Yajing,Li Jing,Xu Yuan,Han Qing,Wei Lixin,Sun Junqi,Guo Jifeng
The development of advanced photocatalysts is crucial for efficient photocatalytic degradation of the antibiotic tetracycline (TC). In this article, a series of BiOI/Bi 2 WO 6 (I/W) with different ratios (9:1, 7:3, 5:5, 3:7, 1:9) were synthesized by hydrothermal method and solvothermal method with BiOI as the primary material. XRD, SEM, FT-IR, XPS, and other analyses showed that the two monomers BiOI and Bi 2 WO 6 were well combined together. The degradation experiment was considered that the 7:3I/W photocatalytic composite has the best degradation effect on TC, which can degrade 84.81% of TC within 120 min. At the same time, the 7:3I/W composite has good stability after five cycles. In the 7:3I/W composite, BiOI and Bi 2 WO 6 were successfully recombined, and a p-n type heterojunction system was formed. This p-n type result not only greatly promoted the separation between e − and h + , but also significantly improved its photocatalytic performances. This paper provided a novel photocatalytic material for treating TC in water, and also created theoretical support for the composite of bismuth-based photocatalytic materials.
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