ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Zeyi Guan,Yidong Huang,Suye Li,Liuyan Zhang,Renyu Zhou,Lichan Wu,Danting Wu,Gengzhe Shen,Guibin Tan
Designing electrocatalysts that are both highly efficient and remarkably stable for the oxygen evolution reaction (OER) holds immense significance in enhancing the performance efficiency of water electrolysis within renewable energy systems. In this study, a MoSe2@NiFe2O4 p–n heterostructure was constructed to effectively regulate the interfacial built-in electric field (BIEF), thereby tuning the electronic distribution and transfer behavior and optimizing the adsorption/desorption reaction kinetics. Structural and electronic characterizations confirmed a pronounced work function difference (Δ = 1.9 eV) between MoSe2 and NiFe2O4, which drives spontaneous electron migration from MoSe2 to NiFe2O4. This leads to the generation of a strong BIEF at the interface, which, in turn, promotes efficient separation and transfer of charge. Benefiting from this, the MoSe2@NiFe2O4 electrode exhibits outstanding OER performance in 1.0 M KOH, requiring only 212 mV to achieve a current density of 10 mA cm–2 and 290 mV to deliver 1000 mA cm–2, while sustaining a minimal overpotential and demonstrating exceptional stability, even when subjected to high current densities, thereby outperforming the majority of previously reported OER catalysts. This work demonstrates that exploiting work function differences to construct and regulate interfacial BIEF offers a new strategy and theoretical foundation for designing highly efficient OER electrocatalysts via interfacial engineering.
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ACS Applied Polymer Materials
·
2026
·
IF 4.7
Zhibo Zhou,Yunqing Gu,Yun Ren,Zhou Li,Denghao Wu,Zhenxing Wu,Jiegang Mou
In order to enhance the actuation performance of photoresponsive hydrogels in view of their slow response rate and limited functionality, a photoresponsive hydrogel was prepared in this study. The hydrogel was constructed with a thermo-responsive poly(N-isopropylacrylamide-co-acrylamide) (P(NIPAM-AM)) matrix cross-linked by chitosan (CS) and incorporated a photothermal conversion component based on the Fe3+/tannic acid (TA) complex. We characterized the hydrogel’s microscopic morphology and measured its water absorption/desorption rates, mechanical properties, temperature sensitivity, photothermal conversion ability, actuation performance, and sensing performance. Results show that adding chitosan and acrylamide together produced a more tightly cross-linked structure. This improved the hydrogel’s mechanical strength, water retention, and actuation performance. Key performance values include a maximum stress of 101 kPa, maximum strain of 100%, and maximum bending angle of 104.8°. The hydrogel achieved a fast actuation response time of 0.732 s, a bending rate of 0.22 mm/s, and a conductivity of 1.154 (Ω·m)−1. It also demonstrated efficient photothermal conversion, NIR-responsive actuation, and conductive sensing performance. This work provides a useful strategy for developing high-performance light-responsive smart materials and a practical solution for multifunctional flexible actuators.
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METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
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2026
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IF 3.3
Chen Buxin,Li Yehui,Chen Mao,Liu Lingling,Ma Kaihui,Bai Chenguang,Hu Meilong
To support green transition of vanadium titanomagnetite blast furnace smelting, various low-carbon blast furnace atmospheres, including oxygen-enriched air injection (CO–N 2 ), oxygen-enriched H 2 -rich air injection (CO–H 2 ), and H 2 -rich air injection (CO–H 2 –N 2 ) were investigated to gain insight on the Ti(C,N) formation mechanisms. In this study, thermogravimetric analysis was first employed to investigate the kinetics of the TiO 2 reaction. Arrhenius-based kinetic modeling revealed that these reactions are primarily controlled by solid-state diffusion, and N 2 directly nitrides titanium oxides to TiN, and the activation energy decreases with increasing N 2 content. In contrast, H 2 lowers the activation energy of the reaction and promotes the reduction of TiO 2 to lower-valence oxides. Then, the carbothermic reduction of TiO 2 -bearing slags was investigated. Chemical composition analysis, XRD, and EPMA-WDS mapping demonstrated pronounced atmosphere-dependent variations in the formation of TiC/N phases. In CO–N 2 atmospheres, Ti(C,N) content decreases with increasing CO content and Ti(C,N) tends to agglomerate. With pure CO, only a few, sparsely dispersed TiC particles were detected. Whereas in CO–H 2 atmospheres, increasing the H 2 concentration markedly enhanced TiC formation, yielding uniformly dispersed particles with slight clustering. Therefore, the overall atmosphere effect on the amount of TiC/N formation follows the order: 100 pct CO < 80 pct CO–20 pct H 2 < 80 pct CO–20 pct N 2 < 60 pct CO–40 pct H 2 < 60 pct CO–40 pct N 2 < 30 pct CO–70 pct N 2 atmosphere (conventional blast furnace atmosphere). Graphical
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MOLECULES
·
2023
·Vol. 28
·期 4
·1714
·
IF 4.6
Yanping Wu,Yuncong Chen,Shankun Yao,Shumeng Li,Hao Yuan,Fen Qi,Weijiang He,Zijian Guo
Cationic, water-soluble benzophenothiaziniums have been recognized as effective type I photosensitizers (PSs) against hypoxic tumor cells. However, the study of the structure–property relationship of this type of PS is still worth further exploration to achieve optimized photodynamic effects and minimize the potential side effects. Herein, we synthesized a series of benzophenothiazine derivatives with minor N-alkyl alteration to study the effects on the structure–property relationships. The cellular uptake, subcellular organelle localization, reactive oxygen species (ROS) generation, and photocytotoxicity performances were systematically investigated. NH2NBS and EtNBS specifically localized in lysosomes and exhibited high toxicity under light with a moderate phototoxicity index (PI) due to the undesirable dark toxicity. However, NMe2NBS with two methyl substitutions accumulated more in mitochondria and displayed an excellent PI value with moderate light toxicity and negligible dark toxicity. Without light irradiation, NH2NBS and EtNBS could induce lysosomal membrane permeabilization (LMP), while NMe2NBS showed no obvious damage to lysosomes. After irradiation, NH2NBS and EtNBS were released from lysosomes and relocated into mitochondria. All compounds could induce mitochondria membrane potential (MMP) loss and nicotinamide adenine dinucleotide phosphate (NADPH) consumption under light to cause cell death. NMe2NBS exhibited remarkable in vivo photodynamic therapy (PDT) efficacy in a xenograft mouse tumor (inhibition rate, 89%) with no obvious side effects. This work provides a valuable methodology to investigate the structure–property relationships of benzophenothiazine dyes, which is of great importance in the practical application of PDT against hypoxia tumor cells.Keywords:benzophenothiaziniums;type I photosensitizers;reactive oxygen species;phototoxicity index;lysosomal membrane permeabilization;mitochondria membrane potential;nicotinamide adenine dinucleotide phosphate;photodynamic therapy
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Nanomaterials
·
2021
·Vol. 11
·期 11
·2798
·
IF 5.076
Huaidong Wang,Chong Qi,Ailing Yang,Xiaoxu Wang,Jie Xu
High fluorescent graphene quantum dots (GQDs) are promising in bioimaging and optoelectronics. In this paper, bright blue fluorescent N-doped GQDs were synthesized using a ultrasonic-assisted hydrothermal method. The morphology, structure, surface chemistry, optical properties, and stability subject to photo-bleaching, temperature, pH and preservation period for the N-GQDs were investigated in detail using various microscopy and spectroscopy techniques. The results showed that the N-GQDs possessed an average size of 2.65 nm, 3.57% N doping, and up to 54% quantum yield (QY). The photoluminescence (PL) spectra of the N-GQDs are excitation dependent when excited in the range of 300–370 nm and excitation independent in the range of 380–500 nm for the core and surface states emission. The N-GQDs showed excellent photo-bleaching resistance and superior photo-stability. At room temperature and in the pH range of 3–8, the fluorescence of the N-GQDs was almost invariable. The N-GQDs can be stably preserved for at least 40 days. The average decay lifetime of the N-GQDs was 2.653 ns, and the radiative and nonradiative decay rate constants were calculated to be 2.04 × 108s−1and 1.73 × 108s−1, respectively. The PL mechanism was qualitatively explained. The N-GQDs was used for cell imaging, and it showed good results, implying great potential applications for bioimaging or biomarking.Keywords:ultrasonic-assisted hydrothermal;nitrogen doped graphene quantum dots;optical properties;photo-stability;cell imaging
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OPTICAL MATERIALS
·
2020
·
IF 2.779
Yingying Wei,Lin Chen,Junli Wang,Xuguang Liu,Yongzhen Yang,Shiping Yu
In order to avoid the interference of autofluorescence and improve tissue penetration capability of carbon quantum dots (CQDs) in biological imaging, the synthesis of long-wavelength emission CQDs was achieved in this work. Boron and nitrogen co-doped CQDs (BN-CQDs) were synthesized by one-step microwave assisted hydrothermal method with o -phenylenediamine as carbon and nitrogen source, boric acid as boron source. The BN-CQDs (QY = 13.79%) synthesized under the optimal conditions exhibit excitation independence, a large Stoke shift, satisfactory fluorescent stability, good biocompatibility and low toxicity, which can meet the basic requirements as cell imaging agent. Cell imaging measurements prove their increased intracellular accumulation with the extension of incubation time with HeLa cells, and clearly observable BN-CQDs imaging for cell morphology. Hence BN-CQDs can be used as a good cell imaging agent.
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Catalysis Science & Technology
·
2026
·
IF 4
Yufeng Zhao,Haozhi Wang,Keyi Zhou,Daoping He,Xi Chen
Electrochemical nitrate reduction to ammonia (NO3RR) represents a promising approach for wastewater treatment while simultaneously offering an alternative to the Haber-Bosch synthesis process. However, current research on metal-free carbon-based catalysts remains limited in scope, exhibits relatively low catalytic performance, and predominantly relies on carbon precursors derived from non-renewable resources. To address these challenges, this study employs chitin and shrimp shells as a precursor to synthesize sulfur-nitrogen co-doped carbon (SNC) catalysts via thiourea doping. At -0.95 V (vs. RHE), the optimized catalyst achieves a Faradaic efficiency of 97.6% and an ammonia yield rate of 21,012 μg h-1 mg-1. Characterizations such as high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and in situ attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) have been conducted to elucidate the catalyst structure and proposed reaction pathways.
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WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
·
2026
·Vol. 42
·期 5
·213
·
IF 4.7
Huan Tong,Zhang Jing-Yi,Huang Jia-Ying,Si Wen-Jie,Wu Yue,Zhang Ye-Wang
Chondroitinase ABC (ChSase ABC), which can digest chondroitin sulfate (CS), has been utilized for the analysis of CS glycan structure and the preparation of low-molecular-weight chondroitin sulfate. However, the catalytic activity of most ChSase ABCs remains insufficient for industrial or large-scale applications. Previous structure studies of ChSase ABCs indicate that the N-terminal domain is typically involved in substrate recognition and binding. Furthermore, the N-terminal domain of the ChSase ABC from Bacteroides thetaiotaomicron ( Bt ChSase ABC) also exhibits similarity with the carbohydrate-binding module of other glycosidases. In the present work, the N-terminal of Bt ChSase ABC was chosen for engineering. Through multiple sequence alignment, 9 non-conserved residues were selected as candidate mutation sites, and a mutant library containing 20 variants was constructed by single-point and combinatorial mutations. Among them, the catalytic activity of 13 mutants showed varying degrees of improvement. The mutant L137V showed 79.29% and 84.49% increases in specific activity and V max , respectively, compared to the wild type. SAX-HPLC analysis of enzymatic hydrolysates confirmed that the mutation retained the enzyme’s substrate recognition and cleavage mechanism. Kinetic parameters revealed that the enhanced catalytic activity of the mutants was mainly attributed to an increased turnover number ( k cat ), indicating that the rate-limiting step of catalysis was effectively accelerated.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Yongxin Guo,Hongda Zhang,Siji Chen,Bolun Zhang,Jiaoyang Ji,Gang Wang,Sitong Zhang,Yong Yu
A novel In 2 S 3 /N-BC@PVA hydrogel evaporator was developed for water purification. • The In 2 S 3 /N-BC heterojunction facilitated interfacial charge redistribution and separation. • Synergistic effect achieves > 99% ARB and > 95% ARG removal. • The evaporator achieves a high evaporation rate (3.93 kg m −2 h −1 ). An In 2 S 3 /N-BC@PVA evaporator is constructed based on the synergistic effect of photothermal catalysis and the regulation mechanism of water molecules, which demonstrates the inactivation rate of ARB (99.77 ± 0.12%), removal rate of ARGs (95–99%), and evaporation rate (3.93 ± 0.16 kg·m −2 ·h −1 ). In 2 S 3 /N-BC reduces the equivalent evaporation enthalpy by activating intermediate water within the hydrogel network. At the In 2 S 3 /N-BC interface, strong interactions induce a metallic-like electronic structure characterized by a high density of states near the Fermi level and a reduced work function, which facilitate spatial charge separation and directed the migration of photogenerated carriers. The -NH 2 is electron-bridging sites to facilitate interfacial charge transfer, which promotes the generation of •OH via hole oxidation. Outdoor testing confirms stable freshwater yield and antibacterial efficacy in 30 d. This work integrates photocatalysis and interfacial evaporation in water remediation strategy, and provides a sustainable approach to address antibiotic resistance and freshwater scarcity. Download: Download high-res image (289KB) Download: Download full-size image
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PEST MANAGEMENT SCIENCE
·
2026
·
IF 4.2
Wang Geng,Ruirui Zhao,Wei Zhang,Jinsong Yang,Kai Yan,Xiuhai Gan
BACKGROUND Protoporphyrinogen IX oxidase (PPO, EC 1.3.3.4) is an important target for the development of highly efficient and environmentally friendly herbicides. Unfortunately, conventional N -phenylphthalimide-derived PPO inhibitors are often plagued by limited herbicidal spectra and unsatisfactory crop selectivity. Therefore, a series of novel and highly active broad-spectrum N -phenylphthalimide herbicidal inhibitors were designed and synthesized via the introduction of amide and isoindolinone moieties. RESULTS Based on the active substructure splicing strategy, a series of N -phenylphthalimide derivatives were synthesized. Among them, compound C4 showed a strong inhibitory effect on Nicotiana tabacum PPO ( Nt PPO) with an inhibition constant ( K i = 38.1 n m ), which was superior to Flumiclorac-pentyl ( K i = 46.3 nM) and Flumioxazin ( K i = 52.0 n m ). Glasshouse assays indicated that compound C4 showed excellent herbicidal activity against six weed species at 150 g a.i. ha −1 and exhibited higher safety on seven crops. Target validation demonstrated that compound C4 could completely inhibit the growth of the ΔhemG- Escherichia coli strain complemented with Arabidopsis thaliana PPO (∆hemG- At PPO) at 100 μ m . Computer simulation results showed that compound C4 could not only form strong hydrogen-bonds with Arg98 (2.9 Å) and alkyl–π interactions with the Gly65, Phe439, and Trp435 residues of Nt PPO, but also possessed excellent chemical reactivity, good electrostatic field characteristics, and high polarity. CONCLUSION Studies have shown that the N -phenylphthalimide derivative C4 , containing amide and isoindolinone structural moieties, can serve as a potential PPO inhibitor. © 2026 Society of Chemical Industry.
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AICHE JOURNAL
·
2026
·
IF 4.4
Zhou Chen,Shengyao Lv,Zhongyao Zhang,Wenyao Chen,Gang Qian,Jing Zhang,Xinggui Zhou,De Chen,Weikang Yuan,Xuezhi Duan
Alkylation of amines with alcohols offers a sustainable route featuring high atom economy and minimal waste, yet remains kinetically challenging due to the inertness of alcohols and the need for coordinated activation of multiple sites. In this work, we report a strategy of engineering Ni/NiAl m O heterojunction structure that synergizes Ni 0 and Ni(Al)O sites toward efficient N-alkylation. A series of Ni/NiAl m O catalysts with varied Ni/Al ratios were prepared by coprecipitation and characterized. The results show a gradual evolution of the oxide phase from Ni(Al)O toward NiO with decreasing Al content, with Ni/NiAl 0.5 O exhibiting the most apparent Ni/Ni(Al)O heterojunction and the highest catalytic activity. Density functional theory calculations demonstrate that Ni(Al)O lowers the barrier for O H cleavage in ethanol relative to NiO, thereby cooperating with Ni 0 sites for subsequent C H activation. This multisite synergistic strategy provides a new avenue for the rational design and preparation of efficient N-alkylation catalysts.
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RSC Advances
·
2026
·Vol. 16
·期 28
·25717-25731
·
IF 6.1
Zhao Du,Yanan Wu,Mengmeng Yu,Zishuang Cheng,Po Hu,Zhonglu Guo,Guifeng Chen,Chengchun Tang,Yi Fang
Herein, porous boron nitride nanosheets (BNNS) exhibiting n-type semiconductor characteristics were synthesized via high-temperature pyrolysis. Subsequently, a series of Bi2O3/BNNS composites with superior photocatalytic activity were constructed using a solvothermal method. Experimental results demonstrate that the optimized composite photocatalyst exhibits significantly enhanced adsorption capacity and photocatalytic activity compared to pristine BNNS and Bi2O3. The optimal Bi2O3/BNNS composite achieved degradation efficiencies of 94.65%, 94.23%, and 93.97% for tetracycline (TC), oxytetracycline (OTC), and doxycycline (DC) (each at 50 mg L−1), respectively, under simulated solar irradiation. This study highlights that the exceptional adsorption capability of BNNS enables the Bi2O3/BNNS composite to fulfill the requirements for synergistic adsorption–photocatalysis. Furthermore, BNNS serves as an effective growth substrate, significantly regulating the growth of Bi2O3 nanowires and suppressing their agglomeration, thereby endowing the composite with a large specific surface area and pore volume. The formation of a p–n heterojunction also effectively suppresses the recombination of photogenerated charge carriers within the catalyst. Finally, this work elucidates the detailed process and underlying mechanism of photocatalytic tetracycline degradation driven by simulated sunlight. In summary, this study innovatively employs the Bi2O3/BNNS composite as a novel photocatalyst for tetracycline degradation and provides theoretical guidance for the design of advanced photocatalysts.
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