APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
·
IF 21.1
Zhuo Li,EnZhou Liu,Carlota Bozal-Ginesta,HaiXia Ma,HuiYong Chen,Bing Wang
The rational design of stable charge-transfer pathways remains a critical challenge in advancing S-scheme photocatalytic systems. Herein, we demonstrate a hydrogen-bond-engineered dual mortise-and-tenon supramolecular architecture using precisely tailored H 12 SubPcB-OCONapOH (SubPc-5) molecules, which synergistically enhance interfacial carrier dynamics and structural robustness. The SubPc-5/TiO 2 heterojunction, constructed through π-π-directed self-assembly, achieves exceptional photocatalytic degradation of oxytetracycline (90%) and tetracycline (99%) within 180 minutes, outperforming pristine TiO 2 by 3–4.5-fold in reaction kinetics. Multimodal mechanistic investigations, including in situ light-irradiated Kelvin probe analysis, synchronous irradiation X-ray photoelectron spectroscopy (SI-XPS), and density functional theory (DFT) calculations, unambiguously verify the S-scheme charge transfer between TiO 2 and SubPc-5. Theoretical investigations reveal that O 2 molecules adsorbed at the O-site on the TiO 2 (101) surface more efficiently capture photogenerated electrons compared to the Ti-site. This work pioneers a supramolecular engineering strategy for constructing mechanically stable and electronically efficient photocatalytic systems, highlighting the transformative potential of mortise-and-tenon nanostructures in environmental remediation applications.
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REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Zheng Cao,Han Wu,Mengxiao Yang,Zhen Li,Xin Chen,Lin Liu
It is a high demand but a great challenge to construct all-in-one ionic conductive hydrogels with excellent mechanical performances, transparency, self-adhesion, conductivity and environmental tolerance. Herein, a versatile gel platform was developed via a facile and rapid photopolymerization of acrylic acid (AA) in deep eutectic solvent (DES) with multiple roles simultaneously as water-free solvent, ionic conductor , regulator of hydrogen bond density. Benefiting from the formed crosslinking networks including covalently cross-linked polymer network and multiple dynamic interactions, the resultant PAA-DES gels exhibited high stretchability of 884.7 ± 4.9%, toughness of 31.2 ± 1.4 MJ/m 3 , fatigue resistance and recovery ability, transparency of 93%, self-adhesive strength of 472 kPa. Moreover, the inherent advantages of DES enabled the gels with good ionic conductivity (2.5 ± 0.2 mS/cm), wide working window and biocompatibility . The PAA-DES as self-adhesive ionic sensors not only possessed wide strain range (∼400%) and stability, but also displayed excellent humidity (30–80%), temperature (−40–60 °C), and sweat tolerance which could precisely and steadily discern and monitor human motions and weak physiological signals. Thus, this work not only provides a strategy to construct all-in-one ionic conductive gels with high elasticity, fatigue resilience, transparency, self-adhesion and wide environmental tolerance, but also exploits versatile platform for intelligent gel sensor and e-skin.
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EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Yutong Huo,Zheng Zhong,Shitong Liu,Shitong Sun,Weiguo Yao,Quanming Li,Yanli Dou
Considering the requirement of environmental and bio-friendliness of flame retardants, there is an urgent need to develop efficient flame retardants based on low-toxicity raw materials. Herein, a nano-fold structure DBN@CoMo-LDH was successfully synthesized by combining layered double hydroxides (LDHs) with hexagonal boron nitride (h-BN), through a sacrificial template approach involving ion-exchange interaction at atmospheric pressure. Thanks to the better compatibility and strong interfacial interactions of hybrids in matrix, epoxy resin (EP) composites can exhibit superior flame retardancy and smoke suppression without loss of mechanical properties. The enhancement and mechanism of fire safety of EP composites were investigated through cone calorimetric test, condensed-phase residue analysis, and gas-phase product analysis. Compared to EP, the peak heat release rate (pHRR), peak smoke production rate (pSPR), total smoke production (TSP), carbon monoxide production rate (COP) and carbon dioxide production rate (CO 2 P) of EP/4DBN@CoMo-LDH were reduced by 37.77 %, 62.96 %, 50.45 %, 45.71 % and 40.98 %, respectively. DBN@CoMo-LDH not only promoted the rapid generation of a dense carbon layer, but also effectively suppressed the release of gas phase products. Furthermore, it demonstrates excellent antimicrobial properties against both Staphylococcus aureus and Escherichia coli . Moreover, the unique nano-fold structure can provide a good thermal conduction path in the matrix, improving the thermal conductivity of EP. This study offers a feasible approach for designing high-performance flame retardants, and suggests their potential application in multifunctional EP composites.
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CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Xuan Hou,Shuhua Ma,Xiaohui Wang,Yanjun Ou,Ruiping Liu
Industrial waste fly ash was transformed into a fluffy C-S-H (hydrated calcium silicate) material with thermal activation process . The textural property of the material makes it easily integrated and well dispersed in cement using 2% addition. Characterization techniques such as hydration heat, XRD , thermogravimetric analysis , were carried out to elucidate the effect of this C-S-H on cement hydration : the compressive strength of cement mortar was improved beyond 25%; and the viscosity of cement paste was reduced by 22%; the volume of solidified cement expand by 10%. This advances the overall utilization of cement and improve the properties as well.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Peng Huang,Xinchun Chen,Wei Qi,Jisen Tian,Jianxun Xu,Kai Wang,Wenli Deng,Chenhui Zhang,Jianbin Luo
Hydrogenated diamond-like carbon (H-DLC) films are limited by their poor thermal stability, which significantly affects the tribological applications and needs improvement. Accordingly, nanodiamond (ND) and hexagonal boron nitride (h-BN) are used to address this issue. When the H-DLC surface is deposited using ND+h-BN mixture with mass ratio of 1:1 and a concentration of 0.1 mg mL −1 and vacuum-heated at 200 °C and 1 × 10 −5 Pa, a superlow friction coefficient of 0.0015 can be obtained, with a reduction of 98.33% as compared to pure H-DLC. Correspondingly, the wear rates of wear scar and wear track decreased by 81.95% and 24.83%, respectively. High vacuum thermal treatment can purify the adsorbed species on the surfaces of ND and h-BN, and produce newly-exposed dangling bonds. Simultaneously, new bonds of C-N are formed between ND and h-BN, and the nanoparticles adhere together to form a polymer-like structure under friction. Furthermore, the ND can support h-BN and reduce its agglomeration. Under the action of tribochemical reaction, the layer spacing of hexagonal boron nitride is increased to obtain a better shear slip. The combination of these factors resulted in ultra-low friction. This study paved the way for developing functional anti-friction additives for durable and high-performance lubrication.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Haijun Chen,Chunli Kang,Shiyi Zhao,Zhuowen Wang,Haiyang Liu,Deming Dong,Jiao Qu,Na Zheng,Xiuyi Hua
Ineffective separation of photo-carriers and slow photoreaction rates seriously limit the decontamination effectiveness of the photocatalyst. To overcome these limitations, herein, the oxygen vacancies modified Z-scheme Ag 3 PO 4 /FeSnO(OH) 5 heterojunction was designed with FeSnO(OH) 5 as a co-catalyst. In this photosystem, Ag 3 PO 4 and FeSnO(OH) 5 function as oxidation and reduction centers of Ag 3 PO 4 /FeSnO(OH) 5 photocatalysts, respectively. Importantly, oxygen vacancies in the Z-scheme heterojunction provide an effective charge transport pathway, which not only inhibits the photocorrosion of Ag 3 PO 4 but also reduces electron-hole recombination, significantly boosting the photocatalytic decontamination performance and long-term stability of the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst. Remarkably, the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst demonstrated outstanding photocatalytic performance, 100 % degrading indomethacin (IDM) under visible light in just 30 min through the main generation of h + that attacks the active atoms of IDM, prominently outperforming other counterparts. Besides, three principal degradation pathways were proposed, and the toxicity of the degradation products was significantly reduced. The Ag 3 PO 4 /FeSnO(OH) 5 exhibited high photocatalytic degradation efficacy across different qualities of water. This research offers an oxygen vacancy modified engineering combined with a Z-scheme heterojunction strategy for constructing extraordinary photocatalysts for environmental purification.
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GREEN CHEMISTRY
·
2025
·
IF 9.2
Xiaoqian Chang,Yunpeng Xu,Chun-Liang Hou,Ruihan Wang,Xiaoyang Chang
Upgrading plastic waste into high-value chemicals and achieving recycling is of great significance for sustainable development. Herein, we report a green, mild, solvent- and metal-free catalytic approach that uses hydroxyl-functionalized ionic liquids to induce the cleavage of C-O and O-H bonds in polyethylene glycol (PEG), successfully converting PEG into ethylene glycol diester. Through experiments, NMR analysis and DFT calculations, we find that the anion and cation of [HO-EtMIm][OTf] can respectively act as hydrogen bond acceptors and donors to activate the O-H and C-O bonds in PEG, as well as the C=O double bond in benzoic anhydride. Subsequently, the activated hydroxyl O atom in PEG can attack the carbonyl C atom in benzoic anhydride through nucleophilic action, and the activated O atom in benzoic anhydride can also attack the C atom in PEG through nucleophilic action, thereby undergoing depolymerization and forming new C-O bonds, ultimately generating the target product. This mechanism clearly demonstrates the importance of unique confinement effect of ionic liquids, which is achieved through spatial confinement, electrostatic stabilization, directional activation, and hydrogen bonding synergy, providing corresponding innovative support for future research.
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JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Guilin Zhou,Xiaodong Zhang,Xin-Long Ni
A water-soluble terpyridine-based cationic fluorescent probe ( SP - TPy ) was synthesized, which emerged with pH-dependent amphiphilicity, resulting in self-assembly and disassembly in aqueous media with the aggregation-induced emission (AIE) property. In neutral water (pH 7.4), a moderate sensing response to Hg 2+ ions was given by the self-assembly of SP - TPy . However, in acidic aqueous media, the monomer of SP - TPy not only appeared to be highly selective and sensitive for Hg 2+ ions, but also displayed highly efficient removal of Hg 2+ ions from solution by rapid precipitation, which was attributed to the coordination-triggered reassembly of SP - TPy . The removal efficiency of SP-TPy f or Hg 2+ was found to be over 99%. Further study indicated that the precipitates were composed of various polyhedral porous frameworks, a property that was further used to adsorb H 2 S gas to form HgS complexes with higher uptake capacities. In addition, SP - TPy can be efficiently regenerated and recycled using a simple treatment with acidic water after adsorption of the H 2 S gas.
研究领域:
化学
·
环境科学
·
材料科学
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Ge Shu,Yuda Li,Zhuang Wang,Jia-Xing Jiang,Feng Wang
Conjugated polymers have recently emerged as encouraging metal-free photocatalysts for solar energy conversion under visible light irradiation. Unfortunately, photocatalytic activities of the current polymers are still inadequate. Herein, we present a simple but quite attractive conjugated homopolymer (PDBTSO) based a dibenzothiophene-S,S-dioxide moiety. The introduction of sulphonyl group to a polyfluorene-like backbone can cause richly available active sites and lead to the efficient separation of photoexcited charge carriers, thus yielding impressive photocatalytic performance. Furthermore, we explored a natural “phosphorylation” strategy for increasing photocatalytic hydrogen production over PDBTSO. Remarkably, an extremely high hydrogen evolution rate of 44.2 mmol h −1 g −1 was achieved with the optimum addition of K 2 HPO 4 under visible light irradiation.
研究领域:
材料科学
·
能源化学
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高影响因子
Small
·
2021
·Vol. 17
·期 52
·2105643
·
IF 13.281
Bo Liu,Linjuan Zhang,Yuanyuan Luo,Lei Gao,Guotao Duan
The supported metal catalysts on scaffolds usually reveal multiple active sites, resulting in the occurrence of side reaction and being detrimental to the achievement of highly consistent catalysis. Single atom catalysts (SACs), possessed with highly consistent single active sites, have great potentials for overcoming such issues. Herein, the authors used SACs to modulate kinetic process of gas sensitive reaction. The supported Pd SACs, established by a metal organic frameworks-templated approach, promoted greatly the detection capacity to hydrogen sulfide (H 2 S) gas with a very high sensitivity and selectivity. Density functional theory calculations show that the supported Pd SACs not only increased the number of electrons transferring from H 2 S molecules to Pd SACs, but strengthened surface affinity to H 2 S. Moreover, the H S bonds of H 2 S molecules absorbed on Pd atomic sites are more likely to be dehydrogenated directly into sulfur species. Significantly, quasi in situ XPS analysis confirmed the presence of sulfur species during H 2 S detection process, which may be a major cause for such detection signal. Based on these results, a suitable sensing principle for H 2 S gas driven by Pd SACs was put forward. This work will enrich catalytic electronics in chemiresistive gas sensing.
研究领域:
材料科学
·
催化化学
·
气体传感
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PubMed
高影响因子
DRUG DEVELOPMENT RESEARCH
·
2021
·Vol. 82
·期 7
·969-979
·
IF 4.36
Ruixian Xing,Xuewen Liu,Buxian Tian,Yan Cheng,Longguang Li
Parkinson's disease (PD) is a disabling neurodegenerative disease mainly caused by degeneration of mesencephalic dopaminergic neurons in the substantia nigra pars compacta (SNpc). The neuroprotective role of Na + /H + exchangers isoform-1 (NHE1) inactivation in cerebral ischemic damage has been elucidated. The current study aimed to investigate the impacts of NHE1 in PD. In this study, 6-hydroxydopamine (6-OHDA)-induced PD rat models were established to attempt to illuminate the role and underlying mechanisms of NHE1 in SNpc neurons of PD. Meanwhile, nerve growth factor-stimulated PC12 cells followed by 6-OHDA treatment was used to mimic PD in vitro. Results showed that the protein levels of NHE1 were significantly increased in the SNpc neurons of rats and differentiated PC12 cells after 6-OHDA treatment. Inactivation of NHE1 with chemical inhibitor HOE642 suppressed SNpc neuronal loss and NHE1 expression in PD rats. The overlays of tyrosine hydroxylase and NHE1 displayed that NHE1 expression was not colocalized but closely associated with TH. Besides, treatment with HOE642 relieved the dyskinesia, mitochondrial dysfunction, and neuronal apoptosis. Further in vitro evidence confirmed that inhibition of NHE1 by genetic-knockdown prevented mitochondrial dysfunction and apoptosis. Our study represents the first experimental evidence of a potential role for NHE1 in the pathogenesis of PD.
研究领域:
神经科学
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神经退行性疾病
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药理学
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细胞生物学
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PubMed
高影响因子
MATERIALS AND STRUCTURES
·
2026
·Vol. 59
·期 6
·303
·
IF 3.9
Yin Jianhao,Liao Jiaxin,Kong Xiangming
The composition, moisture distribution, and microstructural evolutions of calcium-silicate-hydrate (C–S–H) in synthetic C–S–H (SynCSH) and hardened tricalcium silicate paste (HC 3 SP) during the first drying-resaturation (D-R) cycle were systematically compared using low-field 1 H-nuclear magnetic resonance (LF-NMR) and thermogravimetric analysis (TGA). The stoichiometric formulas of C–S–H in SynCSH and HC 3 SP were determined as C 0.9 SH 3.65 and C 2.0 SH 4.53 , respectively. Water contents of C–S–H quantified by TGA and LF-NMR exhibit good linear relationship. Three types of water, interlayer water, gel water and capillary water in C–S–H were identified by LF-NMR. Notable observations included the abnormal increase of interlayer water during the drying process and subsequent decrease during resaturation, along with irreversible decreases in capillary water and increases in gel water after D-R cycle, which were attributed to the rearrangement of C–S–H layered structures. SynCSH exhibited collapse of capillary pore structures following the D-R cycle, resulting in irreversible reductions in total water content. This finding confirms the validity of synthetic C–S–H as a model material for cementitious C–S–H research while highlighting its limitations in predicting the microstructural stability of real cement pastes under moisture cycling.
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