JOURNAL OF HAZARDOUS MATERIALS
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2025
·
IF 11.3
Xiaoyu Jia,Kaiting He,Ling Cai,Yuhui Liu,Henghui Li,Xiaoxiao Dong,Min He,Li Zhang,Guannan Le,Shoulin Wang,Jin Chen
Nowadays, the rapid emergence of drug-resistant bacteria has posed a global threat to the public health, leading to increased cost of environmental hygiene and healthcare treatment, which urges the development of safe and efficient antibacterial strategies. Here, coaxially fabricated electrospun nanofibrous membrane (ENMs) consisted of quercetin (Qu) stabilized selenium nanoparticles (Qu@SeNPs) and electro-synthesized molybdenum disulfide (MoS 2 ) nanosheets were facilely formed as core/shell structure with polyvinyl alcohol (PVA) and α-Lipoic acid (LA) as cross-linker. The obtained ENMs formed by core-shell PVA/MoS 2 /LA/Qu@SeNPs (PMLQS) showed good air permeability and near-infrared-light photothermal responsiveness to kill bacteria efficiently. Moreover, the obtained ENMs resembling extracellular matrix-like properties showed superior biocompatibility with negligible development toxicity of zebrafish. The antibacterial experiments indicated that the produced PMLQS fibrous membrane exhibited more pronounced bactericidal activity against Gram-positive (G + ) Staphylococcus aureus ( S. aureus ) and methicillin-resistant S. aureus ( MRSA ) as compared to that of Gram-negative (G - ) Escherichia coli ( E. coli ). Furthermore, transcriptomic analysis revealed MRSA inactivation by PMLQS ENMs involved disruption of ion transport, antioxidant system, carbohydrate metabolism and energy metabolism. Notably, the MRSA ADI pathway was also blocked supporting the minimized antibiotic resistance development. Therefore, the constructed near-infrared light-responsive PMLQS nanofibrous membrane held promise in tackling drug-resistant bacteria with enormous environmental and biomedical utilizations.
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高影响因子
Small
·
2024
·Vol. 20
·期 40
·2311379
·
IF 13
Yuhui Zhang,Lili Wang,Qing Bian,Chengcheng Zhong,Yupeng Chen,Lei Jiang
2D semiconductor heterostructures exhibit broad application prospects. However, regular nanochannels of heterostructures rarely caught the researcher's attention. Herein, a metal–organic framework (i.e., Cu 3 (HHTP) 2 ) and transition metal dichalcogenides (i.e., MoS 2 )-based multilayer van der Waals heterostructure (i.e., Cu 3 (HHTP) 2 /MoS 2 ) realized band alignment-dominated light-driven ion transport and further light-enhanced ionic energy generation. High-density channels of the heterostructure provide high-speed pathways for ion transmembrane transport. Upon light illumination, a net ionic flow occurs at a symmetric concentration, suggesting a directional cationic transport from Cu 3 (HHTP) 2 to MoS 2 . This is because Cu 3 (HHTP) 2 /MoS 2 heterostructures containing type-II band alignment can generate photovoltaic motive force through light-induced efficient charge separation to drive ion transport. After introducing into the ionic power generation system, the maximum power density under illumination can achieve notable improvement under different concentration differences. In addition to the photovoltaic motive force, type-II band alignment and material defect capture-induced surface charge increase also raise ion selectivity and flux, greatly facilitating ionic energy generation. This work demonstrates that 2D semiconductor heterostructures with rational band alignment can not only be a potential platform for optimizing light-enhanced ionic energy harvesting but also provide a new thought for biomimetic iontronic devices.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiufeng Song,Changhong Liu,Ran Xu,Luyun Cai
Diatoms exhibit great potential for biofuels, high value-added production from wastewater and promoting carbon neutrality. Fucoxanthin is identified as the main carotenoid in diatoms, which is a photosynthetic pigment with a variety of biological activities and physiological functions. Light quality is essential for microalgal growth, photosynthesis and intracellular metabolism, and microalgal cells often respond to the effects of light to regulate their biochemical makeup. Therefore, goal of this research was to develop a strategy for altering light quality and intensity to maximize fucoxanthin generation, in line with the photoresponsive traits of Phaeodactylum tricornutum and to investigate the underlying mechanism based on metabolomics and transcriptomics. Different light qualities, culture strategies, light intensities and light ratios were explored and optimized, and the findings illustrated that the optimal fucoxanthin production was observed when under the red light during the initial phase, followed by a transition to the blue-green mixed light (60μmol m −2 s −1 ) conditions in the subsequent phase. Transcriptome and metabolome analyses showed that the light shift strategy provided sufficient energy and precursors for cell growth and fucoxanthin accumulation by enhancing the EMP pathway, TCA cycle, and light-harvesting complex in photosynthetic system. The present study provides a feasible strategy and mechanism to customize the light quality regulatory strategy to enhance biosynthesis of target bioactive compounds, and provides a theoretical basis for further investigation of the regulatory mechanism, which can provide a foundation for microalgal fucoxanthin production.
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RSC Advances
·
2024
·Vol. 14
·期 32
·23011-23022
·
IF 3.9
Ying Xu,Shuili Yu,Cong Huang,Zheng Xu
The photo-reduction of bromate (BrO3−) has attracted much attention due to the carcinogenesis and genotoxicity of BrO3− in drinking water. In this study, a heterojunction photocatalyst was developed by depositing Au nanoparticles (NPs) onto P25 TiO2 NPs through a one-pot, solvent-thermal process. Due to the unique properties of Au, the Au NPs deposited on the TiO2 surface created a Schottky barrier between the metal and the semiconductor, leading to an effective separation of photo-generated charge carriers as the Au nanoparticles served as electron sinks. The Au/TiO2 photocatalyst demonstrated efficient reduction of BrO3− under UV light illumination without the need for sacrificial agents. The effect of different Au loading of Au/TiO2 was systematically investigated for its influence on the generation of electrons and the reduction ability of BrO3−. The results indicate that the 1% Au/TiO2 catalyst exhibited a higher concentration of localized electrons, rendering it more effective in BrO3− removal. The photocatalytic efficiency for BrO3− reduction decreased upon the addition of K2S2O8 as an electron quencher, suggesting that the primary factor in this photo-reduction process was the availability of electrons. These findings hold promise for the potential application of the Au/TiO2 catalyst in the removal of BrO3− from drinking water through photo-reduction.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
·
IF 4.3
Zhenhua Wang,Jin Miao,Tao Tan,Lin Guo,Rongli Gao,Yue Chen,Wei Cai,Chunlin Fu,Xiang Lei
The I-III-VI QDs Ag-In-S (AIS) exhibits excellent properties in photocatalysis because of the adjustable band gap, wide light absorption range, and multiple active sites. Introducing homologous or heterogeneous ions not only derives the composition into quaternary/ quinary quantum dots but also generates new sulfide QDs to form composites, which is an effective strategy to promote photoactivity. In this work, we in-situ synthesized the AIS/ZIS (AgIn 5 S 8 /Zn 4 In 2 S 7 ) composite photocatalyst by introducing Zn 2+ and changing the reaction temperature. We found that the composite photocatalyst could efficiently photodegrade larger concentrations of RhB than that of the previous reports. The superior photocatalytic activity was due to the formation of the type I high-low junction, which could effectively separate carriers. The photoelectrons on the CB of AIS reacted with dissolved oxygen to produce strongly oxidative O 2 – , which degraded RhB into intermediates and eventually into CO 2 and H 2 O. This work not only reports an excellent photocatalyst but also offers new ideas on the design and manufacture of highly efficient high-low junction photocatalysts.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Taotao Liu,Wenwen Nie,Wei Song,Tong Zhou,Haiying Tang,Xinghai Li,Xuefeng Yu,Guoyu Zhang,Ning Zhao,Changsong Wang
More than 80 % of the potash fertilizer globally is produced by the froth flotation process. Octadecylamine (ODA) and 4-dodecylmorpholine (DMP), the most commonly used flotation collectors, are discharged into salt lakes, posing a hazard to human health and environmental safety. This study investigated ODA and DMP degradation processes under ultraviolet radiation. The experimental results showed that the degradation efficiency of ODA and DMP of 10 ppm reached 100 % within 60 min of UV irradiation in the brine. In contrast, complete degradation in pure water required 80 and 90 min for ODA and DMP, respectively. Notably, salt ions significantly accelerated the degradation of these organic amines compared to pure water. The nitrogen element in both compounds was ultimately converted into ammonium (NH₄⁺). Total organic carbon (TOC) measurements and gas chromatography-mass spectrometry (GC-MS) analyses revealed that the degradation process initiated with the cleavage of C-N bonds, followed by the breakdown of carbon chains. Based on GC-MS data, potential degradation pathways and mechanisms for ODA and DMP were proposed. The possible degradation pathways and mechanisms of ODA and DMP were proposed following GC-MS analyses. Field experiments and the detection of organic compounds in actual brines further validated the photodegradation reactions and mechanisms of the organic amines. This work guides the use of flotation agents and pollution control to produce potassium salts in salt lakes and aids in understanding the degradation processes of organic amines in natural environments.
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ChemistrySelect
·
2025
·Vol. 10
·期 8
·e202405010
·
IF 2
Yujun Liu,Meng Lan,Xiaoli Dong,Nan Zheng,Jialin Gou
Graphical A novel type II CoWO 4 /Cd 0.5 Zn 0.5 S heterostructure photocatalyst is constructed by a simple secondary hydrothermal method and applied for the efficient photodegradation of rhodamine B (RhB) and methyl orange (MO) under visible light irradiation. The expansion of visible light absorption and dense interfacial contact contributes to the excellent photodegradation activity toward RhB and MO. The ecosystems and human health have been gravely impacted by growing organic pollutants and photocatalysis and is regarded as one of the most valid and green governance approaches. Herein, a novel type II CoWO 4 /Cd 0.5 Zn 0.5 S (CWO/CZS) heterojunction photocatalyst was constructed by a secondary hydrothermal method and applied to the photodegradation of rhodamine B (RhB) and methyl orange (MO). The experimental results show that the CWO/CZS heterojunction photocatalyst exhibits excellent photodegradation activity toward RhB and MO under visible light irradiation. CWO/CZS (0.10:1) achieved a degradation efficiency of 96.7% for RhB within 15 min and the apparent rate constants were 135 and 5 times of CWO and CZS, respectively. The high photodegradation rate of MO also demonstrates its excellent photocatalytic activity. The significant improvement in the photocatalytic degradation rate originated from the expansion of visible light absorption and dense interfacial contact between the nanoparticles, which could effectively accelerate the transfer of photogenerated charges. This work demonstrates a novel type II heterojunction photocatalyst for the effective removal of organic dyes, providing fresh ideas for wastewater purification.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Wenlong Mei,Hanhan Lu,Ru Dong,ShanShan Tang,Jinlei Xu
Tetracycline (TC) is one of the most produced and used antibiotics in the world. The accumulation and migration of TC in water bodies cause serious environmental pollution and biological health problems. In this study, three kinds of brookite TiO2 (Ce/BTN) nanophotocatalysts with different Ce doping amounts were synthesized by a one-pot hydrothermal method, which provided an effective way to solve this problem. The chemical and photoelectric properties of nanomaterials were measured by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), high-resolution transmission electron microscope (HRTEM), diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and photoelectrochemical techniques. The results show that after Ce doping, the sample still maintains the brookite crystal form with high crystallinity, and the morphology does not change significantly. However, the impurity energy level can be formed after Ce doping in the brookite TiO2, which reduces the band gap and extends the range of spectral response. The photocatalytic activity of different catalysts was evaluated by degrading TC solutions under simulated visible light. Based on the free radical capture experiment, the effective active species of the catalyst to degrade tetracycline was determined, and the mechanism of photocatalyst degradation was proposed.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2017
·Vol. 123
·期 6
·1-6
·
IF 1.455
Wu Xiang-feng,Li Hui,Sun Yang,Wang Yi-jin,Zhang Chen-xu,Gong Xiao-dong,Wang Yu-duan,Liu Yu,Yang Xin-yue
In 2.77 S 4 nanosheets with the band gap energy of 1.75 eV were fast prepared via a hydrothermal process. The structure, morphology and optical properties of the as-prepared samples were characterized by X-ray diffraction, transmission electron microscopy and UV–vis diffuse reflectance spectroscopy, respectively. Rhodamine B, methyl orange and potassium dichromate solution were used to evaluate the degradation efficiency of the as-prepared samples under the visible light, respectively. Experimental results showed that the molar ratio of thioacetamide to indium nitrate hydrate significantly influenced the structure and properties of the as-prepared products. With increasing the molar ratio, the degradation efficiency of rhodamine B solution was firstly increased and then decreased. When the molar ratio was 4:1, the degradation efficiency of the as-prepared sample reached to 96% in 3 min and 100% in 9 min. Moreover, this semiconductor could degrade 88% of methyl orange solution in 30 min and 87% of potassium dichromate solution in 60 min, respectively.
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NANOTECHNOLOGY
·
2017
·Vol. 28
·期 14
·145101
·
IF 3.44
Shiqiang Chai,Yu Guo,Zhenyu Zhang,Zhen Chai,Yurong Ma,Limin Qi
Long wavelength light-responsive drug delivery systems based on mesoporous silica nanoparticles (MSNs) have attracted much attention in the last few years. In this paper, a red light (660 nm)-responsive drug delivery system based on low-cost cyclodextrin (CD)-gated MSNs containing a photodynamic therapy (PDT) photosensitizer (Chlorin e6, Ce6) was developed for the first time. The drug release experiment in water demonstrated that with the irradiation of red light, Ce6 can be excited to generate singlet oxygen, which can further cleave the singlet oxygen sensitive linker to trigger the departure of CD and the release of cargo. Further in vitro release experiments confirmed that cargo can be released from MSNs with the irradiation of red light and spread into the entire cell. The relative low power density (0.5 W cm−2) of excitation light together with the short irradiation time (one–three min) result in a low light dose (30–90 J cm−2) for the drug delivery, contributing to their potential clinical applications.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2017
·
IF 3.887
Bangbang Li,Peng Zhang,Jianwei Du,Xiao Zhao,Youxiang Wang
Multifunctional nanoprobe was drawing increased attention in tumor diagnosis and therapy. The simple and effective establishment of the theranostic nanoplatforms was still under urgent need. Meanwhile, the targeting ability and morphology of nanoprobe were essential for the effective endocytosis, which could further affect the diagnosis. In this work, two morphologies of nanoprobes were fabricated using gold nanorods (AuNRs) and gold nanospheres (AuNSs). Thiolated-hyaluronic acid labeled with nile blue (HS-HA-NB), a near-infrared (NIR) fluorescence dye, was coated on the surface of the gold nanoparticles to form stable nanoprobes (AuNR@HS-HA-NB, AuNS@HS-HA-NB). The fluorescence of NB molecules quenched outside cells due to the fluorescence resonance energy transfer (FRET), and recovered after the HA degradation inside the cells. HA also could enhance cellular uptake in CD44 receptor highly expressed human breast carcinoma cells (MCF-7). In this way, bioprobes realized the MCF-7 cell images through intracellular fluorescent light-up. Comparing with the sphere bioprobe, the rod-shaped bioprobe dramatically promoted endocytosis to achieve a better diagnosis effect in a short time. After NIR light irradiation, severe MCF-7 apoptosis was observed with AuNR@HS-HA-NB existed. Our studies suggested that the AuNR@HS-HA-NB nanoparticles were the excellent candidates of versatile bioprobes to realize rapid, precise image and photothermal therapy to MCF-7 cells.
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Advanced Optical Materials
·
2024
·
IF 8
Siyuan Ye,Fei Lin,Linwei Peng,Jiaxin Li,Qiaohui Ruan,Zhuohan Lin,Wang Xu,Yan Li
Pure-red CsPbBr x I 3−x nanocrystals (NCs) light-emitting diodes (PeLEDs) are promising candidates for high-performance display due to their high brightness, excellent color purity and readily tunable band gap. However, achieving highly stable pure-red PeLEDs is still challenging due to phase segregation in the mixed halide CsPbBr x I 3−x NCs. Herein, pure-red mixed halide CsPbBr x I 3−x NCs with a relatively small size are synthesized using phosphate acid as a ligand, effectively avoiding spontaneous phase separation. The strong interaction between phosphate ligands and Pb 2+ facilitates the slow formation of CsPbBr x I 3−x NCs, resulting in relatively small NC sizes. In addition, a dense phosphate passivation layer forms around the surface of NCs, which imparts excellent stability to the NCs against light, moisture and heat treatment. Utilizing the highly stable CsPbBr x I 3−x NCs as an emission layer, pure-red PeLEDs emitting at 633 nm, with an external quantum efficiency (EQE) of 10.0%, a brightness of 8231 cd m −2 and a half-life of 393 min, are fabricated. Notably, the PeLEDs show excellent stability, with negligible changes in the emission spectra under an elevated bias voltage of 14 V. This work provides a new avenue for enhancing the performance of pure red PeLEDs through strongly coordinated phosphate ligand passivation.
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