ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 32
·43974-43984
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IF 7.8
Zhang Chuyi,Sun Zhi,Kong Weiqian,Wu Wenzhuo,Zheng Xiaoli,Xu Qun
The enhancement of photocatalytic efficiency is limited by exciton dynamics, where photogenerated electrons and holes rapidly recombine due to strong Coulomb attraction. The manipulation of electron spin, involving the control of electron spin and spin states, has emerged as a promising strategy to improve photocatalytic performance via spin-polarization-facilitated charge separation. In this work, we demonstrate a spin-polarization effect achieved by treating ZnSn(OH) 6 (ZHS) with supercritical CO 2 (SC CO 2 ), which accelerates exciton dissociation and spin-dependent electron migration, thereby enhancing the efficiency of photocatalytic CO 2 reduction to CO. Mechanistic investigations reveal that SC CO 2 treatment induces oxygen vacancies in ZHS, generates spin-polarized electrons, and selectively exposes highly active {111} crystal facets. Experimentally, it reveals that the oxygen vacancies, together with adjacent hydroxyl groups, construct frustrated Lewis pairs (FLPs). Through enhanced quantum spin exchange interactions (QSEIs), the recombination of photogenerated charge carriers is significantly suppressed, and then their lifetime is prolonged, and CO 2 adsorption and activation are simultaneously enhanced. It was found that, under treatment at 16 MPa of SC CO 2 , the CO production rate of ZHS reaches 144.82 μmol·g –1 ·h –1 , which is 29.37 times that of the untreated sample. Therefore, this study demonstrates that manipulating spin-polarized electrons in photocatalytic semiconductors is an effective strategy to boost CO 2 RR efficiency, offering new insights for the design of efficient spin-dependent photocatalysts toward solar energy conversion.
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TRIBOLOGY INTERNATIONAL
·
2026
·
IF 7.6
Ying Gao,Ru Yan,Hualei Cheng,Ping Wen,Rui Dong,Mingjin Fan
One‑pot cation intercalation and interfacial charge programming for α‑Ni(OH)₂ nanosheets. • Unique intercalation‑ionization dual effects expand interlayer spacing and reverse surface charge polarity. • Central heteroatoms (N vs. P) dictate heterolytic vs. homolytic tribochemical pathways. • Ni‑P additive achieves 64.4% friction reduction, 95.1% anti‑wear and 500 N load‑carrying capacity. Layered metastable α-Ni(OH) 2 is a promising lubricant additive due to its tunable interlayer chemistry, yet its intrinsic thermodynamic instability and weak positive surface charge severely hinder interfacial adhesion, oil dispersion and tribological performance. Herein, we develop a facile one-pot interfacial charge programming strategy via cation engineering to modify α-Ni(OH) 2 nanosheets, using tetrabutylammonium hydroxide (TBAOH) and tetrabutylphosphonium hydroxide (TBPOH) as trifunctional alternatives versus NaOH to accomplish Ni 2 ⁺ precipitation, organic cation intercalation and surface charge polarity transition, simultaneously. Compared to traditionally fabricated Ni-Na, the intercalated Ni-N (TBA + ) and Ni-P (TBP + ) exhibit expanded interlayer spacings, exfoliated thin flexible nanosheets, increased specific surface areas and negative surface potentials. Utilized as additives in PAO 10, the intercalation-ionization dual effects leverage molecular rollers, electrostatic anchoring and tribochemical film formation. Combined with multiple characterizations and theoretical calculation, this work reveals that the distinct chemical and electronic properties of the central N/P atoms in TBA + and TBP + leads to preferential heterolytic cleavage for Ni-N and homolytic cleavage for Ni-P under nanoconfinement, friction, and possible Ni-catalyzed conditions, which governs the evolution pathway and final composition of the interfacial tribofilm. As a result, Ni-P delivers the optimal friction-reducing (64.4%), anti-wear (95.1%), load-carrying capacity (500 N), and long-term durability. This work clarifies the structure-tribology relationship governed by intercalation-ionization dual effects, and provides a novel strategy for designing high-efficiency layered lubricant additives. Download: Download high-res image (327KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Kaixuan Wang,Fei Teng,Zixu Zhang,Xiaoxia Ou,Xiaofeng Chen,Junfeng Niu
Synthesized the metal-free B and N co-doped porous carbon (B X NPC) catalysts. • Promoting •OH generation via B doping on B 50 NPC revealed by theoretical calculations. • •OH and 1 O 2 oxidation synergistically enhanced refractory antibiotics removal. • Treating actual pharmaceutical factory wastewater with a low energy consumption. • Excellent detoxification and disinfection performance of B 50 NPC electro-Fenton. Heterogeneous electro-Fenton (EF) is an attractive process for refractory and hazardous pollutants degradation that usually relies on •OH produced via the in-situ decomposition of electro-generated H 2 O 2 on metal-based catalytic sites, which faces the problems of metal shedding and leaching under acidic or even neutral conditions. Designing and investigating a bifunctional metal-free catalyst is a sensible strategy for the development of heterogeneous EF process. Herein, the bifunctional metal-free boron and nitrogen co-doped porous carbon (B X NPC) catalysts were prepared. Total organic carbon removals of hazardous and refractory antibiotics (ciprofloxacin, levofloxacin, sulfamethoxazole, tetracycline, and norfloxacin) by B 50 NPC EF process were 67 ± 2% − 90 ± 2% in 3 h. This process could efficiently treat actual pharmaceutical factory wastewater that chemical oxygen demand (COD) removal was 86.8 ± 1.3% with specific energy consumption of 3.7 ± 0.2–6.7 ± 0.1 kWh (kg COD) −1 superior to previous reports (5.5–290 kWh (kg COD) −1 ). Theoretical calculations and experiments revealed that the B sites and carbon defects in B 50 NPC promoted •OH and 1 O 2 generation, respectively, synergistically enhancing antibiotics removal. The results of toxicity evaluation and E. coli deactivation demonstrated excellent detoxification and disinfection performance. The results gain deep insights into the O 2 reduction mechanism of bifunctional metal-free B X NPC and developing an energy-efficient electrochemical process for promoting the decomposition of hazardous and refractory antibiotics. Download: Download high-res image (218KB) Download: Download full-size image
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Journal of Energy Storage
·
2025
·
IF 9.8
Yuanting Wu,Bocheng Zhang,Xuhua Liu,Jingyue Hu,Yunlong Xue,Ou Hai,Hulin Liu,Xinmeng Zhang
The low specific capacity of capacitor electrode materials has been the main problem restricting their development. Compared with β-phase CoNi LDH, α-phase CoNi LDH has high specific capacity and cycling stability, and has broad application prospects, but there are fewer related studies. In this paper, the preparation of α-phase CoNi LDH is realized by introducing Cl − and WO₄ 2− intercalation into CoNi LDH, and the mechanism of the intercalation ions on the enhancement of the electrochemical properties of the LDH is deeply investigated. Different charge densities and ionic radii of the intercalation anions affect the valence states of the cations in the main LDH layer as well as the spacing of the LDH layers, and phase structure. Cl − possesses a smaller ionic radius and lower charge density than WO 4 2− , and changed the electronic as well as the phase structure of LDH by bonding with doped Co atoms, which induces the formation of interlayer water molecule chains, facilitating electron transfer and structural stabilization. Remarkably, the specific capacity of CoNi-Cl LDH/NF (Cl − inserted CoNi LDH) electrode at 1 A g −1 (2828.74 F g −1 ) is 4 times that of CoNi LDH/NF and 1.9 times that of CoNi-W LDH/NF (WO 4 2− inserted CoNi LDH) respectively, and remained 88.7 % constant after 5000 cycles at 10 A g −1 . This study provided a new idea for the use of anionic intercalated LDH to modulate the phase structure to enhance the electrochemical performance of electrode materials.
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Materials Today Bio
·
2025
·
IF 10.2
Chenfang Miao,Menghan Zhang,Ying Zheng,Xiaoyan Lin,Shuangying Yang,Linlin Xu,Sitong Lu,Zhengjun Huang,Jianyong Huang,Yanjie Zheng,Shaohuang Weng
Aminophylline (AMP), a xanthine-derived bronchodilator with a narrow therapeutic window, requires timely plasma concentration monitoring and pharmacokinetic (PK) studies for safe medication. However, efficient and sensitive detection methods remain limited. In this study, high quantum yield carbon dots (CA/EDA-CDs) were synthesized via a hydrothermal method using riboflavin as the carbon source, citric acid and ethylenediamine as functionalizing agents and dopants. The luminescent structure of CA/EDA-CDs, featuring a π-conjugated system (aromatic C=C and graphite N) and surface chromophores (C=N/C=O) connected via C-N, C-O, and hydrogen bonds, was controllably modulated by hydroxyl radical (·OH). Upon ·OH exposure, the emission band gaps of CA/EDA-CDs at 3.52 eV and 5.21 eV disappeared, while a new level at 2.63 eV emerged, leading to a quantitative and selective fluorescence quenching of CA/EDA-CDs to ·OH. Leveraging xanthine oxidase (XOD)-mediated AMP oxidation to hydrogen peroxide (H 2 O 2 ), which subsequently reacted with Fe 2+ to generate ·OH, a sensitive and accurate fluorescence method using CA/EDA-CDs as probe was fabricated for monitoring AMP with excellent performance. Furthermore, the developed fluorescence strategy was controllably applied to PK studies in rats administered intravenous AMP (11.25 mg/kg and 22.50 mg/kg), yielding parameters consistent with clinical data. These findings underscore the potential of CA/EDA-CDs for rapid and accurate AMP detection, addressing the clinical need for a simple and rapid monitoring method.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2025
·
IF 3.1
Mumtaz Nighat,Li Yanchun,Artiaga Ramón,Guo Qian,Mumtaz Amina
A major challenge in polymer composite research is accurately predicting thermal degradation behavior under different heating conditions while effectively distinguishing primary polymer decomposition from filler-related mass loss. This study introduces a novel approach by employing a logistic derivative function fitting method, which allows for the clear separation of magnesium hydroxide (MH) dehydration from the main degradation of linear low-density polyethylene (LLDPE). Understanding the thermal stability of LLDPE composites is crucial for enhancing fire safety and long-term durability in industrial applications. This study investigates the effect of MH and multi-walled carbon nanotubes (MWCNTs) on the thermal degradation of LLDPE under a nitrogen atmosphere, using non-isothermal thermogravimetric analysis (TGA). Pure LLDPE (PE), LLDPE/MH (mPE), and LLDPE/MH/MWCNTs (mcPE) composites were tested at four heating rates (5, 10, 15, and 20 K min –1 ). The degradation kinetics were analyzed using ASTM E698 and Ozawa–Flynn–Wall classical methods, alongside a logistic-based model that enhances the accuracy of degradation predictions. The results revealed that while the main degradation process of LLDPE remains largely unchanged, secondary degradation reactions were effectively suppressed by the fillers. Additionally, the logistic model allowed for accurate estimation of degradation behavior at untested heating rates. This methodology provides a powerful tool for optimizing polymer composite formulations, particularly in cable insulation and fire-retardant coatings, where enhanced thermal stability is essential for safety and material longevity.
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DALTON TRANSACTIONS
·
2026
·
IF 3.3
Yang Pan,Cong-Min Fan,Tiancheng Feng,Haoyang Peng,Xiaolian Xu,guiqi gao
The slow kinetics of the oxygen evolution reaction hinders the efficiency of water decomposition, so it is crucial to develop noble metal-free electrocatalysts for the efficient decomposition of water via oxygen evolution reaction (OER) in alkaline electrolytes. In this study, flower-like structured hydroxides grown in situ consisting of ultrathin nanosheets stacked on Fe Foam (FF) were prepared by a one-step hydrothermal method for efficient electrocatalytic oxygen evolution reaction. M(OH)(OCH 3 ) (M=Co, Cu) requires only a low overpotential of 270 mV and 379 mV of the OER, to provide 20 mA⋅cm -2 and 100 mA⋅cm -2 current densities respectively. With the synergistic effect of Co 2+ and Cu 2+ , the adsorption capacity of the intermediate OH* and the conductivity are improved, and the structural surface reconstruction are promoted by methoxide. In this work, the structure of FF-based electrocatalysts was modulated by Co 2+ and Cu 2+ introducing and synthesizing methoxy anions, which improved the catalytic activity of the catalysts.
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DYES AND PIGMENTS
·
2026
·
IF 3.9
Xin Yan,Lan Yang,Hao Zhang,Sihan Li,Jing Ouyang,Chunfang Du
Methyl orange was in-situ converted into carbon layers on HNTs. • Carbonization and alkali-etching realized the interface engineering and pore regulation. • HNTs framework prevented the agglomeration of Ni(OH) 2 nanosheets. • The composite removed 98.1% of MO and achieved a maximum capacity of 380.7 mg g −1 within 5 min. In this study, carbonized halloysite nanotubes were obtained by thermal treatment of methyl orange (MO)-coated HNTs followed by alkali activation, which were then used as supports to construct a series of Ni(OH) 2 /carbonized halloysite nanotube composites (denoted as NCHB x - y ) to further remove MO. The as-prepared adsorbent NCHB 0.5 -500 could remove over 98.1% of MO (40 mg L −1 ) and achieve a maximum adsorption capacity of 380.7 mg g −1 within 5 min. Notably, NCHB 0.5 -500 exhibited the strong adaptability to pH and temperature variations, along with the excellent selectivity and versatility in six-mixed-dyes and multiple-anions systems. The adsorption mechanism studies indicated that the tubular HNTs served as a robust framework to prevent Ni(OH) 2 agglomeration, while the alkali-etching constructed a rich mesoporous structure and the in-situ MO modification enriched surface functional groups and introduced π-π stacking interactions. These structural advantages combined with hydrogen bonds and electrostatic attraction synergistically enhanced the interaction between the adsorbent and MO molecules, thereby improved the adsorption performance. This study develops a recommendable method for constructing high-performance and low-cost adsorbents based on clay minerals for wastewater treatment and contributes a sustainable "waste-treat-waste" strategy for functionalizing natural clay minerals. In-situ MO modification and alkali-etching for HNTs contributed to a rich mesoporous structure and enriched surface functional groups, both of which were favorable for enhancing the adsorption efficiency. Download: Download high-res image (306KB) Download: Download full-size image
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FUEL
·
2022
·
IF 8.035
Zhuwei Yang,Xiang Gong,Linsen Li,Zhao Jiang,Riguang Zhang,Tao Fang
Liquid organic hydrogen carriers (LOHC) are considered as the promising candidates for large-scale hydrogen storage. The N -ethylcarbazole/dodecahydro- N -ethylcarbazole (NECZ/12H-NECZ) system has received increasing attention due to its excellent comprehensive properties in the hydrogen storage candidates. In this work, the Pt/SiO 2 -TiO(OH) 2 catalysts are synthesized and show good activity, selectivity and stability for 12H-NECZ dehydrogenation reaction. Among them, the 2.5 wt% Pt/SiO 2 -TiO(OH) 2 catalyst shows the best dehydrogenation performance with 5.75 wt% H 2 release amount and 98 % selectivity of NECZ. Combined with XRD, HRTEM, ATR-FTIR, XPS and EPR analysis, it is found that the oxygen vacancy concentration in Pt/SiO 2 -TiO(OH) 2 is significantly enhanced due to the formation of Si-O-Ti species compared with Pt/SiO 2 and Pt/TiO(OH) 2 , which strengthens the SMSI (strong metal-supporting interaction) effect between metal Pt and support SiO 2 -TiO(OH) 2 . The optimized d-band center of catalyst is beneficial for accelerating the sluggish kinetics of the rate-limiting step of the whole dehydrogenation reaction. Furthermore, compared with the results by replacing SiO 2 with Al 2 O 3 or CeO 2 , it is indicated that the introduction of oxides mainly plays the role of regulating the surface electronic state of TiO(OH) 2 and increasing the oxygen vacancy concentration.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Defeng Qi,Ying Wang,Xinru Xu,Xiao Jiang,Mushtaq Ahmad,Zhao Chao,Zhenyi Yu,Meiling Lian,Yong Wang,Zhen Zhang
Nanostructured transition metal sulfides (TMSs) have attracted great attention owing to their superior electric conductivity and easy redox reaction properties in oxygen evolution reaction (OER) catalysts. However, the strong metal-metalloid bonds (M−S) and metalloid-metalloid (S S) bonds in the crystal structure of TMSs are difficult to break, which might result in the insufficient formation of electrocatalytically active metal hydroxide species on the surface and prevent the realization of their full OER potential. Herein, we demonstrate an approach by sculpting Co(OH) 2 on Co 3 S 4 nanotubes (Co 3 S 4 /Co(OH) 2 ) as highly reactive and stable electrocatalysts for efficient OER. The electron transfer between cobalt and sulfur and the pre-sculpted Co(OH) 2 promote the formation of rich hydroxide active species on the surface of Co 3 S 4 /Co(OH) 2 . The optimized Co 3 S 4 /Co(OH) 2 –0.8 catalyst possesses excellent electrocatalytic activity for OER in an alkaline medium, with a relatively low OER overpotential of 269 mV (at 10 mA cm −2 ) and a Tafel slope of 95.2 mV dec -1 . This work provides a new sight of designing TMS electrocatalysts for practical application in efficient water splitting.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 28
·9721-9730
·
IF 4
Xinyu Liu,Lan Wang,Shan Ji,Vladimir Linkov,Qianqian Fu,Zhichao Li,Hui Wang
Due to their low cost and excellent electrocatalytic performance, nickel-based hydroxides are widely used as hydrogen evolution catalysts for large-scale hydrogen production by water electrolysis. In this study, a heterostructured composite with improved electron transport and modulated electron surface density was prepared by combining Ni(OH)2 with two-dimensional layered Ti3C2Tx (Ti3C2Tx-MXene). Ni(OH)2 nanosheets were formed on nickel foam (NF) substrates using acid etching, followed by the longitudinal growth of negatively charged Ti3C2Tx-MXene on positively charged Ni(OH)2/NF via electrophoretic deposition. The resulting structure facilitates spontaneous electron transfer from Ti3C2Tx-MXene to Ni(OH)2/NF by means of the Mott–Schottky heterostructure effect and establishes a continuous electron transport path which effectively increases the concentration of active sites, improving hydrogen evolution during water electrolysis. The obtained electrode is characterized by an HER overpotential of 66 mV (vs. RHE) and a Tafel slope of +105 mV dec−1 at a current density of 10 mA cm−2, combined with good electrochemical stability.
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Surfaces and Interfaces
·
2023
·
IF 6.2
Lei Zhou,Xiangyu Xi,Haidong Li,Han Song,Qiong Mei,Yuankun Yang,Shu Chen,Qunwei Dai,Faqin Dong
Vanadium contamination has gained increasing attention around the world and it is urgent to develop feasible approach to tackle this growing pollution (e.g., vanadate). Herein, density functional theory (DFT) calculations combined with batch experiments were used to systematically evaluate the capacity of Mg(OH) 2 to adsorb vanadate , by investigating the impacts of different exposed facet and surface OH defect on the structure configurations, adsorption energy and the efficiency of vanadate adsorption. DFT calculations suggested that although the capacity of vanadate adsorption on the facets of Mg(OH) 2 would be obviously influenced by the formation of various coordination complex (e.g., monodentate, bidentate and tridentate) on each facet, the capacity for these facets of Mg(OH) 2 towards vanadate adsorption followed the order: (100) > (001). Moreover, such a vanadate adsorption was further enhanced by the presence of surface OH defect, owing to altered densities of states (DOS) of the adsorption site. Batch experiments verified the defect-rich Mg(OH) 2 was favorable to adsorb vanadate, and both (001) and (100) facet play the great roles. This molecular-level understanding of the facet-dependent and defect-enhanced adsorption behavior of Mg(OH) 2 toward vanadate provides a useful insight into designing and applying effective adsorbents for the removal of heavy metal oxyanions.
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