Catalysts
·
2020
·Vol. 10
·期 6
·695
·
IF 3.52
Weiwei Fu,Zhiqiang Shi,Helong Bai,Jinyu Dai,Zhiming Lu,Feifei Lei,Deguang Zhang,Lun Zhao,Zongtao Zhang
Anatase nanoparticles (5–10 nm) generated on H-titanate nanotube surface (H-titanate/anatase) were prepared by an ingenious and simple method. H-titanate tubes were prepared by a hydrothermal reaction of Ti powder in concentrated NaOH solution and an ion exchange process with HNO3solution. After that, at a relatively low drying temperature (100 °C), a small quantity of anatase nanoparticles were in-situ formed on the H-titanate tubes surface by a surface dehydration reaction. In-situ transformation can form a strong interface coupling between H-titanate and anatase, which is conducive to accelerating charge transfer and improving its photocatalytic activity. In addition, the smaller average crystal size, the large specific surface areas (BET), the nanotubed and layered structure and the synergistic effect of dual phases would be beneficial to improving the photocatalytic efficiency.
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CONSTRUCTION AND BUILDING MATERIALS
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2024
·
IF 7.4
Xuan Hou,Shuhua Ma,Xiaohui Wang,Yanjun Ou,Ruiping Liu
Industrial waste fly ash was transformed into a fluffy C-S-H (hydrated calcium silicate) material with thermal activation process . The textural property of the material makes it easily integrated and well dispersed in cement using 2% addition. Characterization techniques such as hydration heat, XRD , thermogravimetric analysis , were carried out to elucidate the effect of this C-S-H on cement hydration : the compressive strength of cement mortar was improved beyond 25%; and the viscosity of cement paste was reduced by 22%; the volume of solidified cement expand by 10%. This advances the overall utilization of cement and improve the properties as well.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Peng Huang,Xinchun Chen,Wei Qi,Jisen Tian,Jianxun Xu,Kai Wang,Wenli Deng,Chenhui Zhang,Jianbin Luo
Hydrogenated diamond-like carbon (H-DLC) films are limited by their poor thermal stability, which significantly affects the tribological applications and needs improvement. Accordingly, nanodiamond (ND) and hexagonal boron nitride (h-BN) are used to address this issue. When the H-DLC surface is deposited using ND+h-BN mixture with mass ratio of 1:1 and a concentration of 0.1 mg mL −1 and vacuum-heated at 200 °C and 1 × 10 −5 Pa, a superlow friction coefficient of 0.0015 can be obtained, with a reduction of 98.33% as compared to pure H-DLC. Correspondingly, the wear rates of wear scar and wear track decreased by 81.95% and 24.83%, respectively. High vacuum thermal treatment can purify the adsorbed species on the surfaces of ND and h-BN, and produce newly-exposed dangling bonds. Simultaneously, new bonds of C-N are formed between ND and h-BN, and the nanoparticles adhere together to form a polymer-like structure under friction. Furthermore, the ND can support h-BN and reduce its agglomeration. Under the action of tribochemical reaction, the layer spacing of hexagonal boron nitride is increased to obtain a better shear slip. The combination of these factors resulted in ultra-low friction. This study paved the way for developing functional anti-friction additives for durable and high-performance lubrication.
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Science China-Chemistry
·
2014
·Vol. 57
·期 5
·662-668
·
IF 1.516
Chai YunFeng,Pan YuanJiang
Protonation and alkali-metal cation adduction are the most important ionization processes in soft-ionization mass spectrometry. Studies on the fragmentation mechanism of protonated and alkali-metal-cationized compounds in tandem mass spectrometry are essential and helpful for structural analysis. In some cases, it was often observed that a compound attached by different alkali-metal cations (or proton) exhibits similar fragmentation patterns but the relative abundances of product ions are different. This difference was considered to derive from the different electrostatic interactions of alkali-metal cations (or the bonded effect of proton) with the analyte. The alkali-metal cation with a smaller ionic radius shows stronger electrostatic interaction with the molecule because of its higher charge density. In addition, the bonded effect of the proton is stronger than the electrostatic interaction of the alkali-metal cation. In the present study, which used McLafferty-type rearrangements of even-electron ions ([M + Cat] + , Cat = H, Li, Na, K) as model reactions, the effect of cation size in mass spectrometric fragmentation reactions is highlighted. These considerations were also successfully applied to interpret the similar but distinct fragmentation behavior of proton and alkali-metal cation adducts of a synthetic compound (2-(acetamido(phenyl)methyl)-3-oxobutanoate) and a drug (entecavir).
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MATERIALS AND STRUCTURES
·
2026
·Vol. 59
·期 6
·303
·
IF 3.9
Yin Jianhao,Liao Jiaxin,Kong Xiangming
The composition, moisture distribution, and microstructural evolutions of calcium-silicate-hydrate (C–S–H) in synthetic C–S–H (SynCSH) and hardened tricalcium silicate paste (HC 3 SP) during the first drying-resaturation (D-R) cycle were systematically compared using low-field 1 H-nuclear magnetic resonance (LF-NMR) and thermogravimetric analysis (TGA). The stoichiometric formulas of C–S–H in SynCSH and HC 3 SP were determined as C 0.9 SH 3.65 and C 2.0 SH 4.53 , respectively. Water contents of C–S–H quantified by TGA and LF-NMR exhibit good linear relationship. Three types of water, interlayer water, gel water and capillary water in C–S–H were identified by LF-NMR. Notable observations included the abnormal increase of interlayer water during the drying process and subsequent decrease during resaturation, along with irreversible decreases in capillary water and increases in gel water after D-R cycle, which were attributed to the rearrangement of C–S–H layered structures. SynCSH exhibited collapse of capillary pore structures following the D-R cycle, resulting in irreversible reductions in total water content. This finding confirms the validity of synthetic C–S–H as a model material for cementitious C–S–H research while highlighting its limitations in predicting the microstructural stability of real cement pastes under moisture cycling.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Youheng Yao,Gaoxu Han,Yixuan Yao,Chuanjin Wang,Junshu Wu,Wenyuan Zhou,Yongli Li,Jinshu Wang
A TiCl 3 -based route enables H insertion and dispersed Ti sites on WO 3 photoanode. • Dispersed Ti sites favor secondary-hydroxyl activation and DHA formation. • H insertion suppresses free •OH species and mitigates DHA overoxidation. • (H,Ti)/WO 3 achieves 71.9% DHA selectivity and 264.5 mmol m −2 h −1 productivity. Selective photoelectrochemical oxidation of glycerol to dihydroxyacetone (DHA) offers a compelling strategy for integrating solar energy conversion with biomass valorization. However, efficient DHA accumulation remains challenging because two key issues are often underemphasized: the atomic level control of glycerol adsorption geometry for secondary-hydroxyl oxidation, and the suppression of radical mediated overoxidation of the formed DHA. Herein, we report a H, Ti-dual-modified WO 3 photoanode (H,Ti)/WO 3 that enables highly selective glycerol oxidation to DHA via cooperative interfacial pathway regulation. The (H,Ti)/WO 3 photoanode achieves a DHA selectivity of 71.9%—a sharp rise from 35.7% for WO 3 , and a DHA production rate of 264.5 mmol m −2 h −1 , roughly 5 times that of the unmodified counterpart. Mechanistically, highly dispersed Ti sites enhance adsorption of the secondary hydroxyl group of glycerol, directing the pathway toward DHA via two‑electron transfer. H‑insertion, in contrast, shifting hydroxyl chemistry away from free •OH mediated deep oxidation toward more surface-bound hydroxyl species and thereby suppressing DHA overoxidation. With this dual-pronged strategy, our work provides new insights into the selective formation and stable accumulation of DHA in biomass photoelectrochemical systems. Download: Download high-res image (146KB) Download: Download full-size image
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2026
·
IF 9.2
Jian Ma,Jinfeng Sun,Liang Tian,Xiaoyu Bai,Zhuqing Yu
The recycling of waste cathode ray tube (CRT) glass in cement-based materials is hindered by its low early age reactivity which limits mechanical performance and large-scale utilization. This study presents a novel strategy to overcome this limitation by incorporating C-S-H seedings into waste CRT glass-Portland cement (PC) systems. Through a multi scale investigation encompassing workability compressive strength hydration kinetics phase assemblage and pore structure we demonstrate that C-S-H seedings act as both nucleation sites and physical fillers significantly accelerating early age hydration and promoting later pozzolanic reactions. An optimal seeding content of 1.5 wt enhanced 1 d compressive strength by 50.0% compared to the control and even surpassed pure PC by 40.5%. Notably total porosity was reduced by up to 63.2% at 1 d and the critical pore diameter was substantially refined. These improvements are attributed to a dual stage mechanism involving early age nucleation seeding and pore filling followed by enhanced pozzolanic reaction of waste glass at later ages. This work provides a scalable and effective approach for valorizing waste CRT glass in sustainable cementitious materials with a carbon emission reduction of 11.17% compared to conventional PC. The findings also highlight the need for future research on long term durability and life cycle assessment to support practical deployment.
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PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2026
·
IF 5.1
Guan Yanfang,Zhang Qingyuan,Su Jiajun,Jian Yuhang,Wei Xinxin,Yang Xinlun,Zheying Wang,Yang Jinchu,Zhou Bei,Li Limin,Wang Jingxin,Yue Longwang,Shi Yingli
Flexible PEDOT:S-H/CNF paper biosensor enables noninvasive sweat glucose monitoring for wearable use. • 0.2:0.6 EDOT:S-Na₂S₂O₈ ratio yielded 17.08 S/cm conductivity, low swelling, and superior performance. • 3.ENS strategy enabled stable GOx covalent binding, enhancing activity and ensuring long-term stability. • 4.Optimized IDE geometry enhanced charge transfer, boosting sensitivity and lowering resistance. • 5.<5% glucose error in sweat across varied conditions enables real-time clinical monitoring. Biosensors enable disease, environmental, and metabolite monitoring due to high sensitivity, rapid response, and biocompatibility. However, wearable formats suffer from limited flexibility, inefficient enzyme immobilization, and poor wearability. Here, we present a wearable, stable, fast-responding sweat glucose (SG) biosensor using paper-based interdigitated electrodes (PIDE) coated with PEDOT:S-H/cellulose nanofiber (PSH/CNF,PCN) and covalently immobilized glucose oxidase (GOD). The composite exhibits high conductivity (17.08 S/cm), low swelling, and robustness; PSH is synthesized from EDOT:S and Na₂S₂O₈ (0.2:0.6) and mixed with CNF at 1:16 (v/v). The optimized PIDE geometry (1 mm spacing, 0.5 mm width, 10 mm length, 6 pairs) reduces interfacial impedance (180 Ω) and improves sensitivity (0.042 mA/mM). A one-sided GOD immobilization via 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride/N-hydroxysuccinimide/succinic acid (EDC/NHS/SA, ENS) coupling yields ~2% enzyme leaching. The sensor shows a fast response (1.172 s) and peak current (0.1154 mA). Robust performance persists across pH 4–10, 36–39 °C, 3–5 mg/mL NaCl, and 30–70% RH. An SG concentration–impedance model (0.064–4.102 mmol/L) is established. Predicted SG trends deviate by <5% from blood glucose across five physiological states. The PIDE design enables better flexibility, integration and stability than conventional three-electrode sensors. This PIDE biosensor enables sensitive, stable noninvasive SG monitoring. Download: Download high-res image (167KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124471
·
IF 7.5
Sijun Chen,Yang Liu,Jingrong Liu,Tingwei Zhang,Yongcan Jin,Huining Xiao
Sulfonated carbon materials are promising heterogeneous Brønsted acid catalysts for biomass valorization, but the facile construction of carbon frameworks with accessible acid sites remains challenging. Herein, a sulfonated fructose-based porous nanosheet carbon (SPC) was synthesized via a facile and energy-efficient two-step strategy involving P 2 O 5 -assisted rapid self-propagating carbonization and concentrated sulfuric acid sulfonation, and subsequently employed for fructose dehydration to HMF in a low-boiling 1,4-dioxane/H 2 O solvent system. During carbonization, P 2 O 5 simultaneously promoted fructose carbonization and directed the formation of a porous nanosheet architecture, avoiding conventional high-temperature activation processes. The resulting porous nanosheets provided abundant sites for -SO 3 H grafting and enhanced Brønsted acid site accessibility. Consequently, SPC exhibited efficient catalytic performance for the selective dehydration of fructose, affording an HMF yield of 70.1% at 140 ℃ for 30 min. Moreover, SPC efficiently converted concentrated fructose (1.0 g fructose) to HMF with a 59.4% yield and exhibited moderate recyclability. This work provides a facile strategy for constructing biomass-derived sulfonated carbon solid acids with effectively utilized Brønsted acid sites for biomass upgrading.
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DIAMOND AND RELATED MATERIALS
·
2026
·
IF 5.2
Renfei Xu,Xiangjun Li,Miaomiao Li,Yinxia Dong,Libo Tong
Despite the outstanding lightweight potential of Mg alloys, their poor corrosion resistance significantly limits their practical applications in engineering. As a more sustainable alternative to solvent-based resins, waterborne polyurethane (WPU) coatings offer notable environmental and safety benefits, including low VOC emissions, non-flammability, and ease of application. However, the inherent microporous defects formed during the curing process, coupled with the absence of self-healing capabilities, notably undermine their protective performance. In this study, a smart hybrid coating was developed to improve the corrosion protection of WPU on Mg alloys. The coating combines benzotriazole (BTA)-loaded mesoporous polydopamine (mPDA) microspheres and hydroxylated boron nitride (OH-BN) within the WPU matrix, achieving active-passive synergistic protection through dual pH/light responsiveness. The mPDA enhances OH-BN dispersion within the matrix and simultaneously acts as an intelligent carrier for the controlled release of BTA under acidic or light-irradiated conditions. Electrochemical impedance spectroscopy (EIS) showed that, after 6 h of immersion in NaCl solution (pH = 3), the damaged composite coating retained an impedance modulus of 2.37 × 10 5 Ω·cm 2 at 0.1 Hz, and maintained a value of 1.97 × 10 5 Ω·cm 2 under light irradiation-28 and 2.8 times higher, respectively, than pure WPU. These results confirm the coating's outstanding corrosion resistance and stimulus-responsive self-healing capability, which arise from the synergistic effects of the OH-BN barrier and BTA release under pH and light stimuli. This work presents a sustainable and intelligent corrosion protection strategy for Mg alloys in harsh environments.
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SENSORS AND ACTUATORS B-CHEMICAL
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2026
·
IF 8.3
Sihui Wang,Feng Liu,Meng Sun,Hongchun Gu,Lei Yang,Xun Feng,Yang Chen
Hydrogen peroxide (H₂O₂) in skin tissue serves as a critical biomarker for oxidative stress and physiological status, yet its precise in situ monitoring remains challenging due to the lack of non-invasive, real-time sensing platforms. Herein, we presented a smartphone-assisted biosensing system based on a nanozyme-integrated hydrogel microneedle patch for on-site and quantitative detection of cutaneous H₂O₂. The sensing platform incorporated a palladium-embedded metal-organic framework (Pd-PCN) with enhanced peroxidase-like activity, which was co-immobilized with a chromogenic substrate in a polymeric composite hydrogel microneedle array. This composite matrix maintained structural integrity and biocompatibility during short-term skin application while providing an aqueous microenvironment favorable for nanozyme-catalyzed reactions. Upon insertion into the skin, H₂O₂ from interstitial fluid would diffuse into the microneedle and trigger a colorimetric reaction. The resulting color intensity could be quantitatively captured via smartphone-based RGB analysis. The system demonstrated a wide linear detection range (5~100 µM), a low detection limit (1.53 µM), high reproducibility (RSD < 5%), and negligible interference from common biological substances. Confocal imaging and mechanical testing further confirm the structural stability and skin-penetration capability of the microneedle under operational conditions. This work established a reliable, minimally invasive, and user-friendly platform for continuous monitoring of oxidative biomarkers in skin, paving the way for personalized dermatological care and point-of-care diagnostics.
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Journal of Materials Chemistry A
·
2026
·
IF 9.5
Qing Cheng,Yuqi Zhang,Yingying Cao,Long Liu,Yanqiang Zhang
The novel ionic liquid-H2O2 propellants are urgently to solve the intrinsic ignition problem for achieving the aerospace applications. We addressed this issue by tuning the d-band center to adjust the catalyst's adsorption strength for IL/H2O2 toward the optimal value, thus enhancing catalytic activities for the efficient decomposition of H2O2 to generate reactive oxygen species. Herein, the regulation of the d-band center of Cu(I) in Cu(I)-MOF catalyst by precise ligand engineering design was studied. Remarkably, The Cu-S3 coordination of Cu-SH' shifts its d-band center closer to the Fermi level, promoting the adsorption of [BMIM]N(CN)2 and H2O2. Cu-SH' enables efficient H2O2 activation and robust •OH and 1 O2 generation to trigger the rapid self-ignition of [BMIM]N(CN)2-H2O2 propellant. The resulted tid as low as 18.4 ms is nearly 34% lower than that of homogeneous catalyst [FcCH2N(CH3)3]2[Cu2I4]. This work provides fundamental insights into the design of efficient ligand-based combustion catalysts for the higher performance of rockets and spacecrafts.
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危险品化学品经营许可证（带存储）