JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenhui Ji,Xiaohong Ji,Lin Cao,Wei Wang,Shougang Chen
In this research, a self-healing nano-coating with excellent photo-thermal response to near-infrared (NIR) laser is prepared. This coating incorporates silver sulfide anchored bismuth molybdate (Ag 2 S@Bi 2 MoO 6 ) into a shape memory epoxy resin to achieve for a good photo-thermal conversion capability. The Ag 2 S@Bi 2 MoO 6 p-n heterojunction could photo-generate more electron-holes pairs under the NIR laser irradiation. Also, it shows a wider absorption range of visible light, leading to effectively absorb the light energy, generate enough heat to induce the shape memory recovery in the coating, and seal the scratch. The results indicate that the temperature of EP-1 % Ag 2 S@Bi 2 MoO 6 coating has reached about 88 °C, while good self-healing and anti-corrosion properties with a self-healing rate of 88.41 % have been achieved. Furthermore, calculations based on Density Functional Theory (DFT) and Finite Element Method (FEM) pointed out that the formation of p-n heterojunction effectively has enhanced the photo-thermal effect. This research opens a new way for developing self-healing coatings with an ultra-fast response time and high self-healing efficiency.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Lin Li,Hui Liu,Ran Wang,Qing Li,Lexin Zhang,Zhiwei Liu,Tifeng Jiao
To reduce mortality rate caused by life-threatening bacterial infections, advanced antibacterial materials have attracted widespread attention from researchers worldwide. In this study, the antibacterial P(AA-AM)/CA/GA nanofiber membranes with pH-responsive properties were successfully prepared by facile electrospinning technology. A series of characterizations of the obtained nanofiber membranes showed the addition of P(AA-AM) improves the surface wettability of the as-spun fibers in comparison to those of CA and CA/GA nanofiber membranes. High-temperature treatment was found to enhance the mechanical properties of the P(AA-AM)/CA/GA membranes due to the crosslinking reactions. The prepared P(AA-AM)/CA/GA nanofiber membrane exhibits a pH-responsive effect which is evident by the change in GA’s release rate in solutions with different pH values. The cellulose acetate (CA) spinning nanofiber structure formed by P(AA-AM) coated GA also extended the release process of GA and improved the antibacterial timeliness of nanofiber membranes. The antibacterial experiments on E. coli and S. aureus showed that the electrospun nanofiber membranes containing GA had potent antibacterial properties , which were further enhanced by increasing the GA content in the P(AA-AM)/CA/GA blends. This study provides an insight into the design and preparation of pH-sensitive antibacterial materials using facile electrospinning technology.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Huanhuan Wu,Huihui Ding,Jun Ma,Xiang Li,Shuangshuang Huai,Chengming Zhang,Ping Li,Jingjing Xia,Xiaolong Fang,Xiufang Wang
Limited charge transfer and slow oxygen evolution (OER) kinetics significantly impede the practical realization of photoanodes for photoelectrochemical (PEC) water splitting. Here, pn-type-Fe 2 O 3 homojunction photoanode catalysts with P active sites are designed by doping phosphorus (P) into outer lattice of n-type Fe 2 O 3 nanorods (pn-P-Fe 2 O 3 ). The optimized pn-P-Fe 2 O 3 photoanode shows the maximum photocurrent density of 2.61 mA/cm 2 at 1.23 V RHE , and the value is 6.4 times greater than that of pristine Fe 2 O 3 . Experimental and theoretical results clearly show that the P–N homogeneous junctions constructed in Fe 2 O 3 through P-doping increase active sites for H 2 O adsorption and activation, reduce OER reaction energy barrier, and promote effective separation of photogenerated electron-hole pairs and water splitting kinetics. This not only makes the photoelectric water decomposition performance outstanding, but also produces excellent durability. This work provides a novel simple and environmentally friendly strategy for designing effective photoanodes for PEC water splitting.
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ChemSusChem
·
2024
·
IF 7.5
Lina Jia,Gaohui Du,Di Han,Yunting Wang,Youqing Wang,Huayu Li,Wenqi Zhao,Shixian Chen,Miao Zhang,Qingmei Su,Bingshe Xu
Graphical P-doped NiFe 2 O 4 nanoparticles/N-doped carbon nanotubes are prepared via a hydrothermal method followed by phosphorization. The CNTs greatly enhance the electron transfer rate and the P-doping effectively modulates the charge distribution around Ni and Fe atoms, optimizes the energy barriers of adsorption of intermediates, urea and water dissociation, thereby accelerating the kinetics of water splitting and urea electrolysis. The design and construction of highly efficient electrocatalysts for overall water splitting and urea electrolysis are significantly important for promoting energy conversion and realizing green hydrogen production. In this work, we constructed a multi-phase heterojunction through a simple hydrothermal and phosphorization process. The P-doped NiFe 2 O 4 (P-NiFe 2 O 4 ) nanoparticles were uniformly anchored on the bamboo-like N-doped carbon nanotubes (NCNTs) grown via a NiFe-alloy autocatalysis. The electronic structure and coordination environment of active species were optimized by the synergistic action of P doping, well-dispersed ultrafine NiFe 2 O 4 , and NCNTs matrix with good conductivity, enhancing their quantity and activity for electrocatalysis. Consequently, the P-NiFe 2 O 4 /NCNTs/NiFe exhibits excellent HER and OER activities with an overpotential of 111 and 266 mV at 10 mA cm −2 in 1 M KOH, respectively. The symmetrical overall water-splitting cell using P-NiFe 2 O 4 /NCNTs/NiFe as both anode and cathode delivers 10 mA cm −2 at a voltage of 1.604 V in 1 M KOH. Notably, the two-electrode cell requires a low voltage of 1.467 V to achieve a current density of 10 mA cm − 2 in 1 M KOH solution with 0.6 M urea. This designed catalysts display outstanding reaction kinetics and catalytic stability. This work provides useful guidance for applying transition metal-based catalysts for hydrogen production.
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DESALINATION
·
2024
·
IF 8.3
Yuzudi Tong,Xinhua Huang,Na Liu,Ruikun Zhao,Guangzhi Hu
Nitrogen/phosphorus (N/P) doped carbon materials exhibit enhanced electro adsorption capability in capacitive deionization (CDI) applications. However, the incorporation of N/P atoms may introduce electron-withdrawing groups to the electrode surface, impacting the potential of zero charge ( E PZC ) and thereby influencing its electro adsorption efficiency. This research explores the modulation of electrode surface charge by varying the N/P doping composition. Specifically, it presents a Zn and N/P co-doped carbon material employed as the CDI cathode, showcasing selective adsorption of Cu 2+ ions. Under a voltage of 1.2 V, the adsorption capacity achieves 250 mg/g in a 500 mg/L Cu 2+ ion solution. Furthermore, it demonstrates outstanding cycling stability, maintaining an adsorption capacity of 233 mg/g even after 21 cycles. This investigation introduces an innovative approach for E PZC adjustment and offers a fresh theoretical framework for fabricating high-performance CDI electrodes.
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Molecular Catalysis
·
2024
·
IF 3.9
Weiwen Wang,Mengqi Bian,Hui Zhao,Rui Liu,Qinghai Zhang,Yunlong Qu,Guanghui Chen,Jihai Duan
The direct synthesis of methyl methacrylate from isobutene is of great importance in the chemical industry. The direct oxidation of isobutylene to methacrylic acid is one of the key steps, but the selectivity of methacrylic acid is low in the products of one-step oxidation of isobutylene. The efficient one-step oxidation of isobutylene to methacrylic acid was achieved by preparing a Mo-V-P-Ce/KCsWPAV two-component composite catalyst combining asymmetric lattice oxygen with appropriate acidic heteropolyacid catalysts. The catalyst was characterized using XRD, FT-IR, BET, SEM, and others to analyze its structural properties, dimensional characteristics, and more. Results indicated that the composite catalyst accelerated the crystallization rate, with Ce enhancing the oxidation of the active molybdenum species and promoting oxygen activation to form lattice oxygen, thereby improving the oxidation of isobutylene. The heteropoly acids increased the percentage of medium strong acidic sites, enhancing the selectivity of methacrylic acid. Under optimized conditions, with an atmosphere to isobutylene molar feed ratio of ≥25:1 and a temperature of 400 °C, the Mo-V-P-Ce/KCsWPAV catalyst achieved a remarkable 91 % conversion of isobutylene with a 70 % selectivity towards methacrylic acid. The catalyst shows promise for practical applications in the one-step oxidation of isobutylene to produce methacrylic acid, providing a suitable solution to the problem of isobutylene overcapacity.
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Frontiers in Pharmacology
·
2024
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IF 4.4
Huang Yuechang,Zhang Xingmin,Li Qian,Zheng Wende,Wu Panpan,Wu Rihui,Chen Wen-Hua,Li Chen
Type 2 diabetes mellitus is regarded as a chronic metabolic disease characterized by hyperglycemia. Long-term hyperglycemia may result in oxidative stress, damage pancreatic β-cell function and induce insulin resistance. Herein we explored the anti-hypoglycemic effects and mechanisms of action of N-p-coumaroyloctopamine (N-p-CO) in vitro and in vivo. N-p-CO exhibited high antioxidant activity, as indicated by the increased activity of SOD, GSH and GSH-Px in HL-7702 cells induced by both high glucose (HG) and palmitic acid (PA). N-p-CO treatment significantly augmented glucose uptake and glycogen synthesis in HG/PA-treated HL-7702 cells. Moreover, administration of N-p-CO in diabetic mice induced by both high-fat diet (HFD) and streptozotocin (STZ) not only significantly increased the antioxidant levels of GSH-PX, SOD and GSH, but also dramatically alleviated hyperglycemia and hepatic glucose metabolism in a dose-dependent manner. More importantly, N-p-CO upregulated the expressions of PI3K, AKT and GSK3β proteins in both HG/PA-induced HL-7702 cells and HFD/STZ-induced mice. These findings clearly suggest that N-p-CO exerts anti-hypoglycemic and anti-oxidant effects, most probably via the regulation of a PI3K/AKT/GSK3β signaling pathway. Thus, N-p-CO may have high potentials as a new candidate for the prevention and treatment of diabetes.
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Advanced Energy Materials
·
2024
·
IF 24.4
Wenqiang Hu,Jiahe Zang,Qisen Wang,Siyuan Xiao,Jichao Zhang,Fang Fang,Zhongliang Ma,Dalin Sun,Yun Song
Magnesium hydride (MgH 2 ) is a promising hydrogen storage material for its high hydrogen capacity of 7.6 wt.%. However, the further application is severely hampered by the sluggish reaction kinetics and stable thermodynamics. Introducing catalysts is an effective method to improve the reaction rate, but the catalytic activity tends to decrease with an increasing number of reaction cycles, due to the highly reductive Mg and H species. Herein, the spring effect has been observed in the P doped Li 3 VO 4 , in which both V─P and V─V bonds undergo compression and elongation during hydrogen absorption and desorption, respectively. Such a unique self-regulation spring effect not only improves the reaction kinetics of MgH 2 , but also maintains the high activity of P doped Li 3 VO 4 , thereby ensuring the hydrogen capacity of MgH 2 even after 100 loops. This spring effect of chemical bonding, stretched-recovered-stretched with the motion between the highly reductive Mg and H species, will provide insight into catalyst design for hydrogen-related industries.
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GREEN CHEMISTRY
·
2024
·Vol. 26
·期 5
·2783-2792
·
IF 9.3
Jiayi Zheng,Liheng Chen,Zhichang Huang,Xueqing Qiu
Extraction of native-like lignin from lignocellulose is crucial for maximizing the value of all three major components of biomass. In this study, molecular dynamics was employed to reveal the essence of lignin condensation during the pretreatment of biomass with a promising acidic hydrotropic solution (AHS) at the molecular level. Diols were discovered to effectively suppress the excessive acidity of p-toluenesulfonic acid (pTsOH) in AHS while maintaining its solubilizing effect below a minimal hydrotropic concentration (MHC). The experimental results confirmed that the combined use of 1,4-butanediol and pTsOH can extract native-like lignin under mild conditions. The retention of lignin's β-O-4 linkages can exceed 90%, and the lignin extraction rate was over 80%. The obtained lignin can enhance the efficacy of chemical sunscreens, doubling the sun protection factor (SPF). Simultaneously, the residual cellulose was readily hydrolyzed into glucose by cellulase. This strategy demonstrates excellent adaptability to various biomass sources, including herbaceous species, hardwoods, and highly recalcitrant softwoods. The work lays the theoretical foundation for the precise control of biomass component separation using AHS, contributing to the development of mild and efficient component separation technologies in the future.
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Nano Research
·
2024
·
IF 9.5
Yang Yafei,Xu Yihao,Liu Haiquan,Zhang Qi,Liu Boling,Yang Menghua,Dai Huan,Ke Zunjian,He Dong,Feng Xiaobo,Xiao Xiangheng
The oxygen evolution reaction (OER) electrocatalysts, which can keep active for a long time in acidic media, are of great significance to proton exchange membrane water electrolyzers. Here, Ru-Co 3 O 4 electrocatalysts with transition metal oxide Co 3 O 4 as matrix and the noble metal Ru as doping element have been prepared through an ion exchange–pyrolysis process mediated by metal-organic framework, in which Ru atoms occupy the octahedral sites of Co 3 O 4 . Experimental and theoretical studies show that introduced Ru atoms have a passivation effect on lattice oxygen. The strong coupling between Ru and O causes a negative shift in the energy position of the O p-band centers. Therefore, the bonding activity of oxygen in the adsorbed state to the lattice oxygen is greatly passivated during the OER process, thus improving the stability of matrix material. In addition, benefiting from the modulating effect of the introduced Ru atoms on the metal active sites, the thermodynamic and kinetic barriers have been significantly reduced, which greatly enhances both the catalytic stability and reaction efficiency of Co 3 O 4 .
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TALANTA
·
2024
·
IF 5.6
Shuangying Li,Xiaozhong Gao,Linchun Nie,Lutong Bu,Guangyu Dong,Denghao Song,Wenjing Liu,Dejing Meng,Xiaodie Geng,Qingxiang Zhou
In this work, a sensitive fluorescent sensor toward p-nitrophenol (4-NP) integrating magnetic molecularly imprinted materials and carbon dots (CDs) was proposed. Magnetic material and CDs derived from K 3 [Fe(CN) 6 ] and glucose were simultaneously obtained through simple one-step hydrothermal process. Introducing of molecularly imprinted materials based magnetic solid phase extraction (MSPE) endowed the constructed fluorescent sensor with higher sensitivity and selectivity. The significant factors affecting the sensitivity of the sensor toward 4-NP were optimized. Good linearity was obtained between fluorescent intensity of CDs and different concentration of 4-NP from 0.08 to 62.5 μg L −1 . The sensitivity of constructed sensor was very low with detection limit of 0.02 μg L −1 . Reliable applicability was also proved by the well-pleasing recoveries of 94.2–97.8% with different spiked concentrations of 4-NP in real environmental waters.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jian Tang,Geng Gao,Jun Fang,Yusong Yang,Junxian Hu,Bin Yang,Yaochun Yao
Optimizing hydrogen adsorption and enhancing water absorption are essential for the design of effective hydrogen evolution reaction (HER) electrocatalysts. Herein, a well-defined core–shell-structured P-CoNiMoO@Co 2 P-Ni 2 P catalyst was synthesized on nickel foam via high-temperature phosphidation of heterostructured precursor CoMoO 4 ·xH 2 O/NiMoO 4 ·xH 2 O with hydrogen (H 2 ) assistance. This catalyst exhibits good HER performance, requiring only 24 mV of overpotential to achieve a current density of 10 mA cm −2 , and long-term stability, maintaining a current density of 100 mA cm −2 for over 100 h. Density functional theory calculations indicate that the molybdenum site is highly favorable for water adsorption in phosphorus-doped cobalt nickel molybdate (P-CoNiMoO), while the trigonal Ni 3 site is optimal for hydrogen adsorption. These findings indicate that the cooperative interactions and functional division between the core and shell substantially enhance HER performance. In addition, P-CoNiMoO@Co 2 P-Ni 2 P demonstrates high oxygen evolution reaction performance, achieving a current density of 10 mA cm −2 at an overpotential of 243 mV. When functioning as a bifunctional electrocatalyst, it requires only 1.49 V to drive overall water splitting at a current density of 10 mA cm −2 , with a durability of over 200 h at current densities of 100 and 300 mA cm −2 . This study provides significant insights into the development of HER catalysts with potential applications in other fields.
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