Journal of Environmental Sciences
·
2024
·
IF 5.9
Qiang Li,Qi Zhou,Yanling Wu,Yingxue Shi,Yingqi Liu,Hao Deng,Siwei Chen,Zhiheng Li,Erpeng Wang,Huayue Zhu,Qi Wang
Accelerating the separation of carriers in the heterojunction plays vital role in the photoelectrocatalytic (PEC) process, yet it remains a challenging undertaking. Herein, a MOF-on-MOF based dual S-scheme heterojunction (BiVO 4 /NH 2 -MIL-125(Ti)/NH 2 -MIL-53(Fe), denoted as BVO/NM125/NM53) was rationally designed and prepared for PEC removing and detoxification of organic contaminants (phenol, tetracycline hydrochloride, ciprofloxacin and norfloxacin). The S-scheme heterojunction was double confirmed by DFT calculation and XPS analysis. The charge transfer resistance of BVO/NM125/NM53 photoanode decreases to 1/11 of bare BiVO 4 photoanode. Meanwhile, the photocurrent density was 3 times higher, demonstrating a marked improvement in carrier separation efficiency due to dual S-scheme heterojunction. The photoanode achieved 94.3 % removal of phenol within 60 min and maintained stable performance over 10 consecutive cycles, demonstrating good PEC efficiency and structural stability. The BVO/NM125/NM53 photoanode also showed effectiveness in removing antibiotics, with chlorophyll fluorescence imaging confirming a significant reduction in the ecotoxicity of intermediates. For example, wheat seed germination, growth, chlorophyll and Carotenoid production were not affected, which was similar to that of deionized water. Radical trapping experiments and electron paramagnetic resonance (EPR) analysis identified •O 2 - and •OH as the primary active species. This work demonstrates the effectiveness of developing MOF-on-MOF heterojunctions for visible-light response and enhancing charge separation in PEC.
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高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Wen Li,Yan-feng Li,Qian Lu,Cong-de Qiao,Zhi-zhou Yang,Yun-qiang Zhang,Xian Zhang,Hui Zhao
N/S-doped carbon dots/gold nanoparticles/Ag + (N/S-CDs/AuNPs/Ag + ) as a dual-mode nanoprobe was constructed to detect ascorbic acid (AA). Compared with simple carbon dots, N/S-CDs exhibited superior fluorescence properties, which could play a more important role in building a sensitive homogenous FRET fluorescence detection platform. Moreover, AuNPs/Ag + was reduced to core-shell Au@AgNPs by AA in an alkaline environment, which could induce the localized surface plasmon resonance (LSPR) and led to the change of UV absorption peak position from 520 nm to 426 nm with the color changing from pink to bright yellow. Due to the fluorescence “turn on-off” and LSPR, the N/S-CDs/AuNPs/Ag + nanoprobe is inspected for the sensitive dual-mode detection of AA. The linear detection ranges are from 0.5 to 100 μM for colorimetric mode and 0.5–90 μM for fluorescence method. Their LODs are 0.17 and 0.10 μM, respectively. Furthermore, this proposed nanoprobe showed high sensitivity and accuracy for AA detection in real orange juice, displaying great possibility in food testing.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Guangkai Jin,Yuhong Cui,Tiantian Wang,Sha Liu,Shenghua Xue,Shujuan Liu,Qian Ye,Feng Zhou,Weimin Liu
The dispersion stability of nanomaterials in lubricants significantly influences tribological performance, yet their addition as lubricant additives often presents challenges in secondary dispersion. Here, we present a straightforward method for in situ preparation of N,S-codoped CDs (N,S-CDs)-based lubricants using heterocyclic aromatic hydrocarbons containing N/S elements in poly(ethylene glycol) (PEG) base oil by a directional ultrasound strategy. Two types of N,S-CDs were successfully prepared via the directional ultrasound treatment of PEG with benzothiazole (BTA) and benzothiadiazole (BTH) separately. The resultant N,S-CDs have a uniform distribution of N and S elements and maintain good colloidal dispersion stability in PEG even after 9 months of storage. The N,S-CDs can enter the surface gap of the friction pairs and then induce a tribochemical reaction. Benefiting from the synergistic effect of N and S activating elements, a robust and stable protective film consisting of iron sulfides, iron oxides, carbon nitrides, and amorphous carbonaceous compounds is formed, thus endowing N,S-CDs-based lubricants with improved antiwear and friction-reducing performance. Compared with pure PEG, the coefficient of friction (COF) of the N,S-CDs(BTH)-based lubricant decreased to 0.108 from 0.292, accompanied by a 91.2% reduction in wear volume, and the maximum load carrying capacity increased to 450 from 150 N.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shiwei Song,Yanhui Wang,Pengfei Tian,Jianbing Zang
The admire activity, selective and corrosion resistance electrocatalysts for oxygen evolution reaction (OER) are the bottleneck restricting seawater electrolysis owing to the side reactions of chloride ions (Cl − ). Herein, we developed a local amorphous S-modified NiFe-LDH ultrathin nanosheets with large spacing on NiFe foam (la-S-NiFe-LDH/NFF) in-situ via the fast H 2 O 2 assisted etching-anion regulation, resulting in a superior OER catalytic activity for seawater electrolysis. Benefitting from the local amorphous architecture induced by S, enhanced the metal–oxygen covalency, triggered lattice oxygen activity, and reduced the desorption energy of O 2 , the la-S-NiFe-LDH/NFF accelerated the OER progress via the lattice-oxygen-mediated (LOM) mechanism. Additionally, the preferential adsorbed OH – and reconstructed SO 4 2− cooperated to prevent the proximity and erosion of Cl − and enhanced the corrosion resistance for seawater electrolysis. The assembled electrolyzer of Pt/C || la-S-NiFe-LDH/NFF possessed an industrial level of 500 mA cm −2 at 1.83 V potential for seawater electrolysis, and sustained response for 100 h.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiahui Yu,Ping Su,Dong Zhang,Huaihao Zhao,Nan Yang,Tengteng Liang,Dafeng Zhang,Xipeng Pu
Rationally designing a Step-scheme (S-scheme) hetero-structured photocatalyst with high redox capability and separation efficiency of photoinduced carriers is considered as an attractive approach to address the shortcomings of single component and traditional hetero-structured photocatalyst. Herein, enlightened by the predictions of density functional theory (DFT), a unique S-scheme heterojunction photocatalyst was successfully fabricated by incorporating zero-dimensional (0D) Cd 0.5 Zn 0.5 S (CZS) on two-dimensional (2D) lamellar Cu 2 MoS 4 (CMS) plates via a facile coprecipitation method, which substantially enhances the photocatalytic activity for hydrogen (H 2 ) generation. CZS nanoparticles deposited on the surface of CMS nanoplates play a crucial role in creating highly intimate heterojunction interfaces and abundant exposed reaction sites, laying the foundation for improved photocatalytic performance. Furthermore, the significant difference in Fermi levels and band structures between CZS and CMS result in the formation of the internal electric field (IEF) and energy band bending at the interface of the heterojunction. This S-scheme charge transfer path enables 0D/2D CZS/CMS heterojunction possesses an exceptional capacity to maintain the robust redox potential and boosts the separation efficiency of light-induced carriers, as verified by DFT calculations and energy band structure analyses. As expected, the optimal heterojunction exhibits a satisfactory H 2 generation rate of 13.1 mmol·g -1 ·h −1 , which is nearly 7.7-fold higher than that of individual CZS. This study is expected to inspire the design of morphology-controlled hetero-structured photocatalyst with S-scheme charge transfer route for photocatalytic H 2 generation.
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Forests
·
2024
·Vol. 15
·期 2
·236
·
IF 2.4
Liping Yu,Wang Cheng,Meifen Tian,Zhigang Wu,Xiaoli Wei,Xing Cheng,Mingwei Yang,Xuan Ma
The medicinal value ofP. zhennanhas been documented in traditional Chinese medicine books. The aim of this paper was to study the antioxidant activity of alcoholic extracts ofP. zhennanleavesusing 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2-phenyl-4,4,5,5-tetramethylimidazolineoxyl-1-oxyl-3-oxide (PTIO) radical scavenging and ferric ion reducing antioxidant power (FRAP) assays. The active components of the leaves were identified via headspace solid-phase microextraction and gas chromatography–mass spectrometry (HS-SPME-GC-MS). The results showed that the scavenging rate of DPPH was 94.67%with an EC50 value of 0.674 mg/mL at a concentration of 2 mg/mL. The maximum scavenging rate was 47.40% at a Trolox equivalent of 0.33 mg TE/mL for PTIO radicals. The FRAP reached 84.80% at 0.20 mg/mL concentration. The results confirmed the strong antioxidant activity of the extracts. Furthermore, 44 compounds, mostly terpenoids, obtained from the alcoholic extracts ofP. zhennanleaves were analyzed using HS-SPME-GC-MS and 15 of these compounds had a relative content exceeding 1%. The strong antioxidant activity of the alcoholic extracts ofP. zhennanleaves could be attributed to the presence of copaene (33.97%), β-caryophyllene (4.42%), δ-cadinene (11.04%), γ-muurolene (4.78%), cis-calamenene (2.02%), linalool (1.04%), α-pinene (1.46%), borneol acetate (1.5%), and γ-terpinene (0.66%). This study demonstrates the potential medicinal value of alcoholic extracts ofP. zhennanleaves.
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CHEMICO-BIOLOGICAL INTERACTIONS
·
2025
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IF 5.4
Rong Tian,Jia-Xin Li,Naihao Lu
As a replacement of bisphenol A, bisphenol S (BPS) is commonly used in the wrappers and food containers of daily life. Epidemiological studies demonstrate a close link between BPS exposure and vascular diseases, where the biological activities of BPS remain scarcely known. Herein, the effects of BPS on endothelial function as well as the underlying mechanism were investigated in human umbilical vein endothelial cells (HUVECs) and mouse arteries. It was found that exposure of BPS dose-dependently induced endothelial dysfunction (i.e., decline of nitric oxide (NO) formation) in HUVECs, accompanied by the increase of reactive oxygen species (ROS) production and loss of mitochondria membrane potential. Mitochondria-specific antioxidant (Mito-Tempol) or superoxide scavenger (tiron) abolished the harmful effects of BPS, while superoxide dismutase (SOD)-specific siRNA exhibited negative influence, suggesting that mitochondrial ROS was responsible for BPS-induced endothelial dysfunction and SOD was a sensitive target of BPS. Consistently, plasma NO formation and endothelium-dependent vasodilation was significantly impaired in mice exposed to dietary BPS. In addition, the binding of bovine serum albumin (BSA, the most abundant protein in blood) to BPS considerably alleviated ROS formation and endothelial dysfunction in HUVECs. BPS primarily interacted with Sudlow site I of albumin to generate BSA-BPS complex through static mechanism, in which the hydrogen bonds and electrostatic forces played important roles. Altogether, dietary exposure to emerging BPS would disrupt vascular homeostasis via the induction of mitochondrial ROS formation and consequent endothelial dysfunction, highlighting the detoxification impact of albumin protein on the hazardous effects of environmental pollutants.
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Materials Today Chemistry
·
2024
·
IF 6.7
Jing Zhou,Yong Guo,Zhongwei Chen,Tingting Chen,Yuan Yu,Qingwu Zhang,Juncheng Jiang
The construction of epoxy resin (EP) composites with remarkable flame retardancy, transparency, and mechanical properties was a challenging subject in the industry. A novel P/N/S oligomer flame retardant (PALO) was synthesized of terephthalaldehyde (TPAL), 4-aminothiophenol (PATP), and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO), and employed in EP to fabricate a series of EP/PALO composites with different PALO amount. Thermogravimetric analysis (TGA) revealed that PALO exhibited remarkable thermal stability, retaining a substantial char residue of 32.2 wt% at 800 °C. Thanks to the synergy of P, N, and S, EP/PALO composites exhibited excellent flame retardancy properties. The LOI value of the EP/PALO composites saw a rise from 31.0 % to 34.2 % as the PALO content increased from 2.5 to 10 wt%, while UL-94 remained at the V-0 rating. EP/PALO also showed significant heat suppression and smoke suppression effects. The combined effects of the physical barrier from phosphate-containing char in the condensed phase, along with the flame-retardant and dilution effects of phosphorus radicals, nitrogen, and sulfur inert gases in the gas phase, contributed to the significant enhancement in flame retardancy observed in the EP/PALO composites. A notable increase in the tensile strength , flexural strength , and elongation at break of EP was triggered by the incorporation of 2.5 wt% PALO, with enhancements observed by 18.2 %, 16.6 %, and 53.1 %, respectively. Simultaneously, PALO effectively maintained the favorable transparency of EP composites under different addition amounts. Therefore, this study outlined a holistic approach for the development of oligomer flame retardants containing P/N/S and had good application potential for constructing EP composites with superior flame retardancy, transparency, and mechanical properties under different addition amounts.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Guodong Zhang,Zheng-Zhi Yin,Xiaoming Zuo,Haiying Chen,Guochun Chen,Jun Gao,Yong Kong
A natural polysaccharide-based vehicle is facilely prepared for enantioselective loading of S-naproxen (S-NPX) and its programmed release. Cyclodextrin metal-organic frameworks (CD-MOF) are synthesized through the coordination of K + with γ-cyclodextrin (γ-CD). Compared with R-NPX, the CD-MOF preferably combines with S-NPX, which can be confirmed by the thermodynamic calculations. The S-NPX loaded CD-MOF (CD-MOF-S-NPX) is grafted with disulfide bond (–S–S–) to improve its hydrophobicity, and the loaded S-NPX is further encapsulated in the chiral cavity of γ-CD by carboxymethyl potato starch (CPS) hydrogels. The intermolecular hydrogen bonding of the CPS hydrogels is prone to be destroyed in mildly basic media (∼pH 8.0), resulting in the swelling of the hydrogels; the –S–S– linkage in the vehicle can be cleaved in the presence of glutathione (GSH), leading to the collapse of the CD-MOF. Therefore, the programmed release of S-NPX can be achieved. Also in this work, the release kinetics is investigated, and the results indicate that the release of S-NPX is controlled by the Higuchi model.
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ChemistrySelect
·
2025
·Vol. 10
·期 1
·e202403867
·
IF 2
Ben Liu,Binghong Wu,Lianghui Chen,Xinxin Zhang,Jinguo Lin,Xiaoyun Chen
Graphical A cellulose-supported SnW(S,O) 4 bimetal sulfo-oxide catalyst (SW@C) with exceptional catalytic activity in the reduction of MB, RhB, and Cr(VI) in the presence of NaBH 4 under dark conditions were synthesized, which is significant for advancing future research on environmental pollution management using biomass-based materials. In this paper, cellulose-supported SnW(S,O) 4 bimetal sulfo-oxide catalysts (labeled as SnWSO-C or SW@C) with exceptional catalytic performance in the reduction of MB, RhB, and Cr(VI) in the presence of NaBH 4 under dark conditions were synthesized via an in-situ hydrolysis method. The cellulose-supported catalyst system with diverse tree species of Pinus massoniana (Pm), Populus tomentosa Carrière (Ptc), Rice hull (Rh), Phyllostachys edulis (Pe) was investigated. The 100 mL solutions of MB (20 ppm), RhB (50 ppm), and Cr(VI) (50 ppm) were completely reduced by SW@Cotton, SW@Pe, SW@Rh, SW@Ptc, and SW@Pm within 10, 7, 13, 4, and 4 min for MB; 7, 7, 8, 10, and 4 min for RhB; and 5, 8, 10, 10, and 8 min for Cr(VI), respectively. Among them, SW@Pe catalyst exhibits the highest catalytic reduction efficiency and excellent stability, maintaining a removal rate of 96% after six cycles. The superior catalytic reduction performance was attributed the unique properties of Phyllostachys edulis cellulose, characterized by low crystallinity (53.25%), minimal ash content (0.15%), and the lowest degree of polymerization (1267). These features facilitated the improved dispersion of the SnWSO bimetal sulfo-oxide, leading to smaller crystal size, lower electrochemical impedance (2.24 Ω), and a larger electrochemically active surface area (21.86 mF/cm 2 ). This study demonstrates the potential of cellulose-supported bimetal sulfo-oxide catalysts for wastewater treatment, which is significant for advancing future research on environmental pollution management using biomass-based materials.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Wen Huang,Jiawei Zhang,Guoqiang Deng,Guang Zhu,Yaohui Chen,Chenxi Xu,Jigui Cheng
Anion exchange membrane fuel cells (AEMFCs) have emerged as a promising clean energy technology due to their high efficiency and the potential to eliminate the reliance on precious metal catalysts for the oxygen reduction reaction (ORR) at the cathode. Developing highly efficient nonprecious metal catalysts is crucial for enhancing AEMFC performance. In this study, we report a Co–S–N–C@MXene catalyst through sulfur doping and support loading. This catalyst demonstrates exceptional ORR activity, achieving a half-wave potential (E1/2) of 0.881 V. After 10,000 cycles of cyclic voltammetry (CV) testing, the E1/2 showed a minimal decline of only 14 mV, demonstrating excellent durability. Moreover, the AEMFC based on the catalyst achieved a peak power density of 466 mW cm–2.
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JOURNAL OF LIPID RESEARCH
·
2020
·Vol. 61
·期 4
·580-586
·
IF 4.483
Teng-Fei Yuan (袁;腾;飞,Juan Le (乐;娟,Shao-Ting Wang (王;少;亭,Yan Li (李;艳
Analyzing global steroid metabolism in humans can shed light on the etiologies of steroid-related diseases. However, existing methods require large amounts of serum and lack the evaluation of accuracy. Here, we developed an LC/MS/MS method for the simultaneous quantification of 12 steroid hormones: testosterone, pregnenolone, progesterone, androstenedione, corticosterone, 11-deoxycortisol, cortisol, 17-hydroxypregnenolone, 17-hydroxyprogesterone, dehydroepiandrosterone, estriol, and estradiol. Steroids and spiked internal standards in 100 μl serum were extracted by protein precipitation and liquid-liquid extraction. The organic phase was dried by evaporation, and isonicotinoyl chloride was added for steroid derivatization, followed by evaporation under nitrogen and redissolution in 50% methanol. Chromatographic separation was performed on a reverse-phase PFP column, and analytes were detected on a triple quadrupole mass spectrometer with ESI. The lower limits of quantification ranged from 0.005 ng/ml for estradiol to 1 ng/ml for cortisol. Apparent recoveries of steroids at high, medium, and low concentrations in quality control samples were between 86.4% and 115.0%. There were limited biases (−10.7% to 10.5%) between the measured values and the authentic values, indicating that the method has excellent reliability. An analysis of the steroid metabolome in pregnant women highlighted the applicability of the method in clinical serum samples. We conclude that the LC/MS/MS method reported here enables steroid metabolome analysis with high accuracy and reduced serum consumption, indicating that it may be a useful tool in both clinical and scientific laboratory research.
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高影响因子
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