ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yan Xiong,Min Li,Liping Peng,Aye Aye Thant,Nannan Wang,Yanqiu Zhu,Ling Xu
2D/3D heterojunction perovskites, meaning a rationally prepared 2D capping layer on 3D perovskite films, have been demonstrated as an effective avenue for simultaneously enhancing the efficiency and stability in perovskite solar cells (PSCs). However, the mechanism of the 2D perovskite induced by organic agents is still not extensively studied. Here, we report 2D/3D heterojunction PSCs by in situ fabricating a 2D modified layer on 3D perovskite films with [(p-fluorophenyl)ethyl]ammonium acetate (FPEAAc). During the annealing process, FPEAAc melts and uniformly covers the 3D perovskite films. Then, the excess acetate salt is volatilized, eventually forming a compact 2D perovskite thin layer. On the one hand, the organic agents can effectively rivet onto the 3D perovskite surface, ensuring formation of the necessary 2D perovskites with hydrophobic FPEA+ ions. On the other hand, the reaction generates some PbI2, which passivates the defects on 3D perovskite films and improves the interface contact, significantly enhancing the open-circuit voltage (VOC) and fill factor (FF) in 2D/3D PSCs. The highest power conversion efficiency of 22.53% is achieved compared with 20.16% in 3D PSCs. The 2D/3D-heterojunction-structured PSCs modified by FPEAAc exhibit high stability, retaining about 90% of the initial device efficiency after 500 h at 85 °C and 40 ± 5% relative humidity. Our research provides a simple method to control the 2D perovskite layer formation and effectively enhance the performance and stability in 2D/3D heterojunction perovskite cells.
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高影响因子
Applied Materials Today
·
2023
·
IF 8.3
Guiyang Yu,Ke Gong,Lan Hu,Chuanwang Xing,Yujia Hu,Debao Wang,Xiyou Li
The development of mild and environmental method for direct transformation of aromatic alcohol into hydrobenzoin via controlled C‒C coupling is a highly attractive but challenging goal. In this paper, a P-doped g-C 3 N 4 photocatalyst with NiS nanoparticles modification is first reported to apply the visible-light-driven C‒C coupling of aromatic alcohol into hydrobenzoin, as well as integrating with the production of clean H 2 fuel. The synergistic effect of doped P atoms and formed type-II heterojunction between PCN and NiS improves the light absorption ability of g-C 3 N 4 and greatly suppresses the charge recombination. Optimized 2.0% NiS/PCN composite achieves the complete conversion of aromatic alcohol within 6 h reaction time, as far as we known, which is the highest efficiency so far for aromatic alcohol conversion via photocatalytic strategy. Hydrobenzoin is controllably formed with 68% selectivity, together with a highly-efficient H 2 production rate of 994.8 μmol·g −1 ·h −1 . In-situ EPR studies reveal a preferential activation of C‒H bond than O‒H bond in aromatic alcohol by photoexcited holes, forming C 6 H 5 ĊH 2 OH radicals for subsequent coupling. The residual protons interact with photoexcited electrons to generate H 2 . Our study not only offers an efficient g-C 3 N 4 -based photocatalyst for the synthesis of hydrobenzoin under mild conditions, but also opens up a new avenue for manipulating the activation of C‒H or O‒H bonds for high selectivity of hydrobenzoin product.
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高影响因子
IONICS
·
2023
·Vol. 29
·期 4
·1531-1541
·
IF 2.8
Huang An,Liu Peijun,Lin Peihua,Fang Ming,Jin Guanping,Chen Chunnian
Pursuing efficient, economical, and stable electrodes on hydrogen production by water splitting is of great significance for new energy sources. In this work, Ni-Co-P self-supported electrocatalyst at macroporous nickel mesh electrode (NCP/NM) was prepared by a combination of hydrothermal and phosphorylation reactions. The Ni-Co with spherical form was in-situ deposited on nickel mesh (NM) in the alkaline environment provided by aqueous ammonia. The phosphorylation process offered the doping of P elements at the surface of Ni-Co, forming irregular nanosheets. The fabricated electrode only needed to be supplied with an overpotential of 126 mV to respond to a current density of 10 mA cm −2 in 1 M KOH electrolyte. The lower Tafel slope (87.62 mV dec −1 ) and charge transfer resistance suggested NCP/NM electrode exhibited competitive hydrogen evolution reaction (HER) kinetics. In addition, NCP/NM showed good durability and applicability in the alkaline medium. The increase in electrochemical active area, the fast electron transfer without binder, and the synergistic effect among Ni, Co, and P collectively contributed to the electrode with competitive hydrogen production performance. The inspiring HER performance of NCP/NM, as well as the low-cost and easily accessible synthesis method, displayed the enormous potential and advantages of its application in industrial water splitting for hydrogen production.
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ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Linli Dai,Yi Xie,Yongkui Zhang,Yabo Wang
Metal-free carbon catalysts perform well in peroxymonosulfate-based advanced oxidation process for the treatment of organic pollutant-containing wastewater. Herein, a natural biomolecule of adenosine triphosphate (ATP), containing abundant N and P elements, served as sole precursor to prepare N,P-co-doped carbon through one-step anoxic pyrolysis , which was applied as peroxymonosulfate activator to treat bisphenol-contaminated water. Owing to the endogenous N and P elements in ATP, in-situ doping was achieved for the prepared carbon material with excellent doping effect, such as high doping amount and numerous defects. During pyrolysis process, the generated gases facilitated the exfoliation of carbon structure, resulting in a nanosheet-like morphology with large specific surface area, e.g., 852.75 m 2 g −1 for NPCN-900 sample obtained at 900 °C. Benefiting from the structural modulation brought by N,P co-doping, typical sample of NPCN-900 presented excellent catalytic performance towards bisphenol AF (BPAF) degradation through PMS activation . An apparent reaction rate constant of 0.4115 min −1 was calculated under the investigated reaction conditions. Further studies indicated that 1 O 2 , surface-bound •OH and SO 4 − • worked together in NPCN-900/PMS system for BPAF degradation. Graphitic N, pyrrolic N, C O groups, defect structure and the doped P atoms in NPCN-900 contributed to PMS activation. It was also important that the toxicity of BPAF solution could be preliminarily eliminated after treatment by NPCN-900/PMS system, which was verified by ecotoxicity assessments through ECOSAR program and green algae growth experiments.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xuxu Wang,Wenhui Qu,Ruxiu He,Junling Meng,Fen Yao,Ping Nie,Hairui Wang,Limin Chang,Limin Wang
Cobalt phosphide is a promising anode material for lithium-ion batteries (LIBs) due to a high theoretical capacity at low potentials when reaction with lithium. While, capacity-decay upon cycling and unsatisfied rate performance limited the practical application in LIBs. Herein, we report the design and synthesis of free-standing electrode composed of CoP/P-C nanofilm and lightweight carbon cloth (denoted as PCC@CoP/P-C) as an anode material for LIBs. The facile and in situ strategy for the synthesis of PCC@CoP/P-C involves phytic acid (PA) complexed with Co 2+ and subsequent annealing treatments. Owing to the unique structural merits of CoP/P-C nanofilm and the lightweight PCC , the PCC@CoP/P-C free-standing electrode exhibits an ultrahigh specific stability capacity and nice cycle stability when direct used as anode for LIBs. This work offers an easy and environment friendly method to boost lithium performance for transition metal phosphides anode materials.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 23
·e53926
·
IF 3
Huaiyin Liu,Penglun Zheng,Junwei Li,Jichang Sun,Rui Wang,Haihan Zhao,Jing Wu,Yun Zheng,Quanyi Liu
Epoxy resins (EP) have great chemical and physical properties, but their poor flame retardant properties have prevented their widespread use. To improve the flame retardancy properties of EP, an active P/N/Si flame retardant (KDC) containing a double bond was successfully synthesized in this work by using a typical aldehyde amine condensation reaction. This flame retardant not only can form a large molecule flame retardant in situ by double bond reaction and increase the tightness with EP matrix, but also has the advantage of P/N/Si three elements synergistic flame retardant, and at the same time play the flame retardant performance of each element, can achieve excellent flame retardant performance and low smoke and toxicity with low addition amount. Subsequently, the performance of the flame retardants was tested. When 7 wt% of KDC was added, the pHRR and TSR of the EP composites were reduced by 51.7% and 29.8%, respectively. More importantly, the addition of KDC inhibited the release of toxic fuels and smoke from EP, where the TSP values of EP/3-KDC were 18.14% below those of neat EP and increased the residual amount of charcoal, while the inhibition of CO and CO 2 release was particularly pronounced with the presence of KDC.
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FUEL
·
2023
·
IF 7.4
Chao Wang,Ying Liu,Kang Niu,Jia Li,Qing Cao,Xiuchen Zhao,Hongyang Li,Ningfei Wang,Baolu Shi
To improve the combustion efficiency of widely used micro-aluminum (μAl) particle, enhancing its ignition and combustion performances is a critical issue via breaking through the intrinsic Al 2 O 3 layer covering the Al-core. This study proposed a facile in-situ ‘one-pot’ electroless plating method to functionalize the surface of μAl particles with ternary-shelled nickel-phosphorus-copper alloy coating and furthermore investigated the thermochemical and ignition/combustion behaviors of energetic core–shell composites (defined as Al@Ni-P-Cu). The microstructure characterization results of Al@Ni-P-Cu demonstrated that a spherically distributed triple-shell Ni-P-Cu alloy with the thickness of 129 nm was tightly coated on μAl particle surface. Through TG-DSC analysis, the Al@Ni-P-Cu composites exhibited improved heat release (7597.7 J/g) and decreased initial oxidation temperature (814.3 °C) in comparison to that of μAl particle with 949.2 J/g and 960.1 °C, respectively. The Al@Ni-P-Cu exhibited extremely shorter laser ignition delay time of 36.3 ms under 1 MPa O 2 atmosphere, reducing by 86.86% compared with that of raw μAl particles (276.3 ms); and its maximum flame temperature could reach up to 1588.93 °C, increasing by 243.36 °C compared with that of μAl (1345.57 °C). The drastic improving performances were attributed to the synergistic effects of surface/interfaces reactions along with heat release in the core–shell structure, resulting in enhanced mass and heat transfer to facilitate the combustion of internal Al-core.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jie Tao,Feihao Yang,Tao Wu,Junjiao Shi,Hai-Bo Zhao,Wenhui Rao
The frequent occurrence of fires caused by rigid polyurethane foam highlights the importance of its fire safety, however, the existing flame-retardant methods often seriously deteriorate the mechanical properties and thermal insulation of the foam. Here, we demonstrate a new idea for thermal insulation, flame retardancy, smoke suppression, and reinforcement of polyurethane foams only by incorporating a P/Cu-hybrid silica aerogel. This unique aerogel combines with the carbon-promoting action of P, catalytic attenuation of Cu, and the barrier effect of aerogels, thus leading to high smoke-suppressing and flame-retardant efficiency for polyurethane foam. At a low addition amount of 5 wt% aerogel, the total heat release, peak heat release rate, total smoke release, and toxic CO production of the composite foam are all significantly reduced. Interestingly, the aerogel-containing composite foam exhibits a special hierarchical porous structure, which enables lower thermal conductivity and higher thermal insulation than pure RPUF. Benefitting from the good compatibility and nano-enhancing effect of the aerogel, the compressive strength of the composite foam remarkable increase of 52.2%. This research offers an effective method for designing high-performance foam materials with high fire safety and low thermal conductivity, which has broad application prospects in the field of thermal insulation.
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Journal of CO2 Utilization
·
2023
·
IF 7.7
Meng Chen,Mingrui Guo,Mianmian Zhai,Jixiang Xu,Lei Wang
Graphitic carbon nitride (g-C 3 N 4 , CN) with high light harvesting and suppressed charge recombination is desired in photocatalytic reactions. Herein, locally crystalline CN (KP/CN) with photoresponse edge of 648 nm was synthesized by a two-step calcination method. First step was P-doping via calcining phytic acid and nitrogen-containing precursor. Another was local crystallinity tailoring via calcining with KSCN. The obtained KP/CN facilitated the n → π* electronic transition, exhibited improved light utilization and charge mobility. Theoretical calculations confirmed that CO 2 adsorption and activation became easy on KP/CN-2. The yields of CO and CH 4 under KP/CN catalysis were 58.7 and 29.0 μmol g −1 , respectively, after 5 h in the presence of 0.5 mL water. This work demonstrated the synergistic enhancement of light absorption and charge carrier dissociation via doping and partial crystallization.
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BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Ding Jiang,Xiaojiao Du,Qian Liu,Nan Hao,Kun Wang
Constructing junctions between semiconductors is an effective way to promote charge separation and thus to improve the photoelectrochemical (PEC) performances, and specifically, p-n heterojunction is considered as a very promising structure. Herein, we designed and fabricated MoS 2 /nitrogen doped graphene hydrogels (MoS 2 /NGH) p-n heterojunction by a facile one-pot hydrothermal route. The as-fabricaterd MoS 2 /NGH heterostructures demonstrated the excellent PEC activity, exhibiting enhanced photocurrent intensity by the fast transfer and separation rate of photogenerated electron-hole owing to the construction of p-n heterojunction. Based on the high PEC performances of the MoS 2 /NGH heterostructure, a novel sensitive PEC sensor was developed for the determination of chloramphenicol (CAP) with the assistance of aptamer . In the presence of target molecules, the as-fabricated PEC sensor could recognize the CAP quickly and then consume the holes in the interface of heterostructures, inhibiting the recombination of photogenerated electron-hole pairs, resulting the enhanced photocurrent. Specially, with the concentration of CAP increased, the photocurrent enhanced gradually. Excellent linearity was obtained in the concentration range from 32.3 ng/L to 96.9 μg/L, and the limit of detection was 3.23 ng/L. Moreover, the as-fabricated PEC sensor exhibited rapid response, high stability, low-cost and high selectivity , which could be successfully applied to the analysis of CAP in honeycomb samples.
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高影响因子
MOLECULES
·
2019
·Vol. 24
·期 10
·2011
·
IF 3.06
Xiyang Sun,Xin Xu,Yanfei Chen,Rong Guan,Tingting Cheng,Ye Wang,Rui Jin,Min Song,Taijun Hang
This study aimed to investigate whether the anti-tumor effect of gemcitabine (GEM) in non-small-cell lung cancer (NSCLC) treatment was affected by Danggui Buxue decoction (DBD), and explore the potential mechanisms. The combined use of GEM and DBD showed an enhanced tumor growth inhibition effect in a murine Lewis lung carcinoma (LLC) model. LC-MS/MS results showed that the pharmacokinetic behaviors of a GEM active metabolite, gemcitabine triphosphate (dFdCTP), were found to be altered remarkably in the peripheral blood mononuclear cells (PBMC) of DBD co-administration rats. In addition, after co-administration of DBD with GEM, Western Blot and qPCR results confirmed that the expression of deoxycytidine kinase (dCK) in tumor tissues of LLC-bearing mice were markedly increased. DBD co-administration also reversed the upregulation of P-glycoprotein (P-gp) in tumor tissues induced by GEM. Moreover, DBD could notably up-regulate the IL-12p70 and GM-CSF expression in mice serum, suggesting potential immunomodulatory activities in tumor-bearing mice. Meanwhile, DBD inhibited the P-gp efflux activity in A549 cells. Therefore, the regulation of dCK and P-gp played important roles in the alternation of GEM pharmacokinetics and the enhancement of the anti-tumor effect of GEM. DBD being a potential dCK promoter could work as an adjuvant agent to boost the anticancer effect of GEM.Keywords:Danggui Buxue decoction;TCM formula;gemcitabine;pharmacokinetics;herb–drug interaction;deoxycytidine kinase;P-glycoprotein
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Shahzad Afzal,Xie Quan,Sen Lu
Ceria based catalysts have been widely applied in ozonation of organic pollutants in wastewater treatment. Ceria with different exposed facets have not been used in catalytic ozonation. In this study, ceria nanorods (R-CeO 2 ), nanocubes (C-CeO 2 ) and nanooctahedra (O-CeO 2 ) with different exposed facets (110) + (100), (100) and (111)) respectively were used in catalytic ozonation of p-nitrophenol. Two calcination temperatures 300 and 500 °C were selected for comparative catalytic activity. Ceria nanoparticles (NP-CeO 2 ) were also prepared for comparative catalytic activity. Approximately 86%, 71%, 68%, 64%, 60% and 40% TOC was removed by ozonation catalyzed by R300-CeO 2 , C300-CeO 2 , CeO 2 -NP, O300-CeO 2 , R500-CeO 2 and ozonation alone respectively. Nanorod calcined at 500 °C (R500-CeO 2 ) showed lower catalytic activity as compared to R300-CeO 2 . O 3 was also rapidly decomposed by R300-CeO 2 as compared to other catalysts and single ozonation. Inorganic hydroxyl radical scavengers and several characterization techniques were applied for investigating the underlying mechanism of catalytic ozonation. Hydroxyl radicals, surface peroxide and surface atomic oxygen as reactive oxygen species were generated for enhancing the catalytic activity. Furthermore, irrespective of surface area, the difference in catalytic activity of ceria nanoshapes were assigned to the differences in the abundance of surface basic sites, defects densities/oxygen vacancies (OVs) and coordination number of surface atoms. This study provides an insight to use other metals with variety of exposed facets for catalytic ozonation.
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