ACS Applied Materials & Interfaces
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2024
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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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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ao Zhou,Dan Zhang,Zhihong Liu,Zhiyong Liu
With the retirement of rechargeable lithium-ion batteries (LIBs) entering peak period, the recycling of LiCoO 2 has become a hot topic. The spent LiCoO 2 batteries are rich in carcinogenic metal Co and high-value metal Li, so they are needed to be recovered in time before causing serious environmental pollution and resource waste. Thus, a clean and efficient process is proposed for the comprehensive recovery of Li, Co, and Mn from the spent LiCoO 2 cathode material. It is an integrated pyro-hydrometallurgical process, mainly consisting of sulfation roasting with NH 4 HSO 4 and selective sulfurizing leaching with (NH 4 ) 2 S solution. Using low melting point ammonium salt as roasting auxiliary, 99.7 %, 99.1 %, and 99.8 % of Li, Co, and Mn in the spent LiCoO 2 powder can be converted into sulfate when roasting under 400 ℃ for 75 min. Then 99.5 % of Li in the sulfation roasting product can be selectively leached with an aqueous (NH 4 ) 2 S solution, which is also a precipitator for Co, Mn, and impurity Al. In addition, 96.4 % of Co and 96.0 % of Mn in the sulfurized precipitate can be separated with impurity elements Al and C via oxidation roasting–water leaching process. Compared to traditional recycling, this method can achieve a higher Li leaching rate at a low roasting temperature, and the recovery of Co and Mn can be realized without adding any acid/base reagents or impurity cations. More importantly, the circulation of NH 3 /NH 4 + and S element in the recycling system has been taken into account, making it an environmental-friendly and economical process. In this study, the sulfation reduction roasting and selective sulfurizing leaching mechanisms were both revealed in details, and the behavior of the valuable elements was also elucidated.
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Surfaces and Interfaces
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2024
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IF 5.7
Cijun Shuai,Gao Pan,Qi Zhong,Shuping Peng
Bacterial infections considerably limit the success of scaffold transplantation. CuO 2 may generate hydroxyl radicals through a self-cascade catalytic process, which is effective for sterilization. However, reducing CuO 2 -derived Cu + ions to Cu° can lead to a decline in catalytic activity. To overcome these limitations, we anchored CuO 2 onto MoS 2 to establish stable Cu-S-Mo interfacial sites. The CuO 2 /MoS 2 nanozyme was fabricated using a low-temperature co-precipitation technique and introduced into poly- l -lactic acid scaffolds using selective laser sintering. The Cu-S-Mo interfacial sites showed a triad of functions that synergistically enhanced catalytic performance. These sites stabilized the Cu atoms, augmented catalytic activity by facilitating efficient electron transfer through the Mo 4+ /Mo 6+ redox couple, and improved the conduction of heat derived from the photothermal response of MoS 2 to the Cu catalyst. The synergistic action of chemodynamic and photothermal therapy, mediated by the Cu-S-Mo sites, resulted in remarkable antibacterial efficacy, with 92.3 % and 93.5 % inhibition rates against Staphylococcus aureus and Escherichia coli , respectively. Experimental evidence and simulations demonstrated that Cu-S-Mo structure stabilized the Cu atoms and improved electron transfer via interatomic charge transfer. These results highlight the potential of the CuO 2 @MoS 2 /PLLA scaffold in eliminating bacterial infections.
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ChemistrySelect
·
2025
·Vol. 10
·期 1
·e202403867
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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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Journal of Materials Chemistry C
·
2025
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IF 5.1
Chang Zhang,Xin Zhang,Wei Wang,Hao Xue,Qian He,Fenglin Li,Xiaoli Wang,Qinghui Jin,Kun Zhou,Jiawen Jian
This paper presents an ammonia (NH3) fluorescent sensor based on the MAPbBr3 perovskite and the multifunctional organic material (R/S)-OBN-tCz. The incorporation of (R/S)-OBN-tCz enhances the sensor's photoluminescence (PL) intensity through Förster resonance energy transfer (FRET) and passivation effects, which consequently improves the sensitivity of the gas sensor. The MAPbBr3&(R/S)-OBN-tCz@PMMA nanofibers fabricated via electrospinning technology not only increase the specific surface area effectively, which is crucial for sensitivity improvement, but also strengthen the stability of the perovskite material under an air atmosphere. The experimental results demonstrate that the sensor maintains stable PL performance for up to 30 days in air and over 10 hours in water, while exhibiting rapid and reversible fluorescence response to NH3.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Shi-Ting Huang,Yong-Qian Lei,Peng-Ran Guo,Hong-Xin Chen,Shu-Chai Gan,Zeng-Hui Diao
In this study, a biomass-derived carbon block with heteroatoms (P and S) self-doped graphene structure was successfully synthesized by spent coffee grounds (SCG) directly sintered method. The spent coffee grounds biomass-derived carbon (SCC) block was used as electrocatalytic electrode to effectively degrade the antiviral drug of Favipiravir (FAV) in water, which represented excellent oxygen reduction reaction (ORR) activity with the H2O2 production. The doped heteroatoms in the graphene structure of SCC provided many active sites in the electrocatalytic electrode for ORR as well as more production of reactive OH･. Based on the structural characterization, radical species identification and intermediate products analysis, the reaction mechanism of FAV degradation by the SCC block electrode was proposed. This catalytic system also showed high ecological safety that the ecological toxicity for Vibrio fischeri was significantly reduced with the degradation process of FAV. The degradation of FAV in recycle test and in real sample of lake water, well water, tap water all demonstrated high stability of structure and catalytic activity of SCC. The electrocatalytic system based on SCC block electrode has realized the recycling and utilization of biomass resources and has promising application on the removal of environmental pollutants.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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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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Materials Today Chemistry
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2024
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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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CHEMICO-BIOLOGICAL INTERACTIONS
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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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JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2011
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IF 2.733
Lihong Liu,Shenglan Li,Zilin Chen
A simple and selective method was developed for the simultaneous determination of tetrandrine and fangchinoline in herbal medicine by HPLC with electrochemical detection (ECD) on a bare glassy carbon electrode. The HPLC separation and ECD conditions have been optimized. The separation was carried out on a WondaSil ® C18-WR column (4.6 mm × 250 mm, 5 μm), with the mobile phase of acetonitrile–ammonium acetate buffer (pH 6.5; 40 mM) (32:68, v/v) using an isocratic elution at the flow rate of 0.5 mL/min. The electrochemical detection potential was set at +0.9 V. The obtained LODs for tetrandrine and fangchinoline were 0.26 and 0.27 μmol/L, respectively. The method was successfully applied to the analysis of tetrandrine and fangchinoline contents in Stephania tetrandra S. Moore. It has been demonstrated that the LC-ECD method is an excellent technique for analysis of the herbal medicine. The mean recoveries were in the range of 95–105%, while the precision expressed as repetition of peak area was lower than 2.7%.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2012
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IF 2.237
Liangyan Wang,Xiabin Jing,Haibo Cheng,Xiuli Hu,Lixin Yang,Yubin Huang
The long-chain branched polylactides (LCB-PLAs) prepared by coupling the hydroxyl-terminated two-arm (linear) and triarm PLA prepolymers of identical arm length with hexamethylenediacianate (HDI) were used to improve the melt rheological and crystallization properties of linear polylactide resin, PLA 4032D from NatureWorks. The blends containing LCB-PLA displayed higher zero shear viscosities, more significant shear shinning, more melt elasticity, and much longer relaxation times together with significant strain hardening in elongational deformation. Tg, Tm and crystallinity (Xc) of linear PLA remained virtually unaffected, but the crystallization rate increased obviously, since the branch points of LCB-PLAs could play a role of nucleating agent. High melt strength, fast crystallization, and favorable miscibility improved the foaming ability of the linear/LCB-PLA blends, substantially.
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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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