ACS Catalysis
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2026
·
IF 13.6
Zhaowei Tian,Lei Wang,Yuan Deng,Luxuan Sun,Shijie Zhou,Zhitong Qian,Xun Zhao,Xin Zhang,Yusen Yang,Min Wei
Single-atom catalysts (SACs) with explicit active sites have shown advantages in heterogeneous catalytic reactions; however, the optimization of their performance in multistep tandem reactions [e.g., hydrodeoxygenation-isomerization (HIS) reaction in biomass conversion] remains a formidable challenge. Herein, we report a metal–acid bifunctional catalyst that is featured with Ni single atoms immobilized into the montmorillonite (MMT) framework via isomorphous substitution, followed by surface acid modification. The optimized 0.4 wt % Ni/MMT-IA catalyst exhibits prominent catalytic performance toward one-pot HIS reaction of palmitic acid with an iso-alkanes yield of 80.3%, which is preponderant to the state-of-the-art catalysts. Furthermore, the obtained catalyst not only displays durability for 30 reaction cycles (240 h, 300 °C), but also demonstrates universality in HIS reactions of 10 bio-oils. By virtue of in situ spectroscopy characterizations and theoretical calculations, we substantiate a two-step consecutive reaction pathway, including *COOH hydrodeoxygenation and *COH hydroisomerization. The single-atom metal–Brønsted acid site (Niδ+-O(H)) serves as the intrinsic active center, which significantly promotes the rate-determining step (β-H scission of the carbonium ion intermediate), resulting in the extraordinarily high yield of iso-alkanes. This work provides a feasible method for the design and preparation of high-performance SACs, which shows prospective applications in biofuel synthesis.
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Foods
·
2026
·Vol. 15
·期 1
·137
·
IF 5.1
Xingyue Gao,Xinming Zhao,Jie Huang,Huan Liu,Jielun Hu
This study aimed to elucidate the structure–activity relationship between the structural characteristics of three plant-derived polysaccharides, Lycium barbarum polysaccharide (LBP), citrus pectin (CP) and peach gum polysaccharide (PGP), and their prebiotic functionalities. Structural analysis indicated that LBP exhibited a medium molecular weight and was rich in galactose and rhamnose, which contributed to its high uronic acid content, strong antioxidant activity, and sustained fermentation profile with enhanced butyrate production. In contrast, CP, with its low molecular weight and neutral linear glucan backbone, was rapidly utilized by gut microbiota, leading to accelerated propionate accumulation. Meanwhile, PGP, characterized by an ultra-high molecular weight and a highly branched arabinogalactan configuration, acted as a specific substrate that promoted mid- to late-stage fermentation and significantly increased butyrate yield, highlighting its prebiotic property driven by structural complexity. The functional differences among these polysaccharides were determined by their monosaccharide composition, molecular weight distribution, and chain conformation. These findings provide a scientific basis for the targeted development of plant-derived prebiotics aimed at specific metabolic functions.
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ACS Nano
·
2026
·
IF 16
Han Chen,Yanxia Gao,Jiaxin Du,Runlong Hao,Xuanhao Wu,Lidong Wang,Zhongbiao Wu
The electrochemical nitric oxide reduction reaction (NORR) provides a promising pathway for mitigating air pollutant NO while generating valuable ammonia (NH3). However, most research has focused on high NO concentrations (≥10%), which contrast with industrial dilute streams (≤1%), where conventional catalysts, such as single-atom catalysts (SACs), struggle with insufficient active site density and limited *H supply, while nanoparticle catalysts suffer from hydrogen evolution reaction (HER) competition. To address these challenges, we designed a hybrid catalyst consisting of atomically dispersed Co–N4 satellitic sites and Co(111) nanoparticles (Co SA-NPs). Through electronic interaction, Co(111) facilitated enhanced water dissociation to generate *H, while Co–N4 sites strengthened NO adsorption and activation. This cooperative mechanism promoted rapid *H spillover, enabling selective NO hydrogenation to NH3 while suppressing HER. Under 1% NO, Co SA-NPs achieved a significant NH3 yield rate of 11389 μg cm–2 h–1, which is 2.6 to 243.9 times higher than all previously reported NORR catalysts. At industrially relevant and ultralow concentrations (0.05, 0.1, and 0.5%), it maintains a notable average Faradaic efficiency of 93.6% and NH3 yield rates (556, 948, and 3120 μg cm–2 h–1 respectively) among the highest reported under such challenging conditions. Furthermore, the catalyst demonstrated durability with >85 h of stable operation, and a cumulative NH3 production reaching the gram-scale, showcasing its practical potential. Techno-economic analysis (TEA) revealed that NORR with Co SA-NPs could achieve zero-cost NO treatment and even generate profit, compared to traditional NH3–SCR.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 8.4
Bingnan Li,Jinlong Shi,Xiang Li,Jianli Ding,Jinjie Wang,Dongxing Wu,Xinlei He,Yuan Zhang
Fenton oxidation technology can generate highly reactive free radicals through a series of processes and is widely used for advanced mineralization treatment of industrial wastewater. However, its oxidation rate is limited by the regeneration of Fe 2+ . This research was based on the Fenton principle and combined with electrochemistry to develop a ferric ion recycling system using discarded stainless steel as the cathode. This system regenerates Fe 2+ through electrochemical reduction, catalyzes hydrogen peroxide to produce hydroxyl radicals, and then degrades pollutants. Results show that after filling the cathode with stainless steel scrap, its electrochemical active area reaches 2633 cm 2 . At a current density of 0.6 mA cm −2 and an influent flow rate of 80 mL min −1 , the regeneration efficiency of iron ions reaches 83 % within 70 min, with a current efficiency of 93 % and energy consumption of 8.21 × 10 −4 kWh g −1 Fe 2+ . After adding hydrogen peroxide at a COD:H 2 O 2 ratio of 1:1.5, the electrochemical system could remove 97 % of phenol and 90 % of COD, with an energy consumption of 4.21 × 10 −5 kWh g −1 COD. The reaction mechanism of the electrochemical system was verified through electrochemical analysis and quenching experiments. Results indicate that the direct oxidative degradation effect of the electrode on pollutants is minimal, and the degradation of pollutants primarily originates from the oxidation of • OH, which is generated by the Fenton reaction catalyzed by Fe 2+ . The electrochemical system developed in this study exhibits high stability, enabling the effective degradation of pollutants while achieving the resource utilization of metal waste and iron sludge. This provides technical support for its industrial application.
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Food & Function
·
2026
·
IF 5.4
Li Jiao,Jiangdong Zou,Huanhuan Ma,Danfei Huang,Chang Li
This study employed ultrasonic-assisted DES technology to extract jujube polysaccharides (ZJP) and investigated the effects of α-galactosidase modification on their structural characteristics and prebiotic functions. The modified polysaccharide (α-ZJP) exhibited significant alterations in physicochemical properties, including reduced neutral sugar and protein content, increased reducing sugars and uronic acids, and a shifted molecular weight distribution due to selective cleavage of galactose and rhamnose residues. Structural analysis confirmed the retention of key functional groups and revealed a transformed morphology from smooth sheets to a porous, sponge-like architecture. In vitro fermentation demonstrated that α-ZJP promoted rapid initial microbial growth and short-chain fatty acid (SCFA) production, by enriching Firmicutes and Lachnospiraceae. In contrast, unmodified ZJP showed sustained fermentation, yielding higher total SCFAs and selectively promoting butyrate-producing bacteria like Coriobacteriaceae. Both polysaccharides enhanced microbial diversity and SCFA accumulation, indicating their potential as prebiotics for gut health through distinct structure-dependent mechanisms.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 4
·245
·
IF 5.4
Shao Yanming,Rong Xuan,Zhao Huanhuan,Feng Huanran,Ma Wenli,Peng Wenli,Gao Guohao,Yang Xianyu,Jiao Ziwei
A fluorescent molecularly imprinted polymer (FMIP) sensor for the selective detection of bisphenol A (BPA) was constructed based on surface-initiated reversible addition-fragmentation chain transfer (SI-RAFT) polymerization with mesoporous silica (mSiO 2 ) as the carrier. N-allyl-4-ethylenediamine-1, 8-naphthalimide was used as the fluorescent functional monomer, with mSiO 2 as the carrier. The high specific surface area of the mSiO 2 carrier provides more imprinting sites for the FMIP, thereby effectively enhancing the recognition efficiency of the resulting imprinted polymer. Azide groups were initially grafted onto the mSiO 2 surface. Subsequently, an alkynyl-functionalized RAFT agent was introduced via a copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction. The FMIP was then synthesized by RAFT polymerization using BPA as the template and methacrylic acid (MAA) as the functional monomer. Upon rebinding of the template BPA to the imprinting cavities, the fluorescence of the MIP-capped N-allyl-4-ethylenediamine-1, 8-naphthalimide was efficiently quenched. The ratio of fluorescence intensity exhibited a linear response to the concentrations of BPA ranging from 5 to 80 µM, with a detection limit of 0.43 µM. Moreover, the FMIP sensor was successfully applied to detect BPA in real samples, with recoveries ranging from 96.55% to 102.25% and relative standard deviations (RSDs) of 0.4%-1.57%. The results indicate that the prepared FMIP sensor shows great potential for the detection of BPA in environmental media.
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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Ange Zhu,Jingkang Gao,Yunjun Mei,Mengxi Cao,Fengjie Chen,Bolei Chen,Yong Liang,Yawei Wang
Photocatalysis is a promising strategy for environmental remediation but is commonly limited by inefficient charge separation and slow interfacial reaction kinetics. Herein, an aerosolized microdroplet–coupled semiconductor photocatalytic system is developed to enhance photocatalytic performance through interfacial microenvironment regulation. Dispersing TiO₂ nanoparticles into aerosolized microdroplets enables synergistic coupling between the strong built-in electric field at the gas–liquid interface and the localized interfacial electric field at the semiconductor–water interface, which significantly promotes photogenerated charge separation and hydroxyl radical generation. The microdroplet-assisted system achieved a •OH generation rate of 0.31 min⁻¹ within 60 min and a methylene blue degradation rate of 0.16 min⁻¹ within 20 min, markedly outperforming the bulk-phase photocatalytic system (0.17 and 0.11 min⁻¹, respectively). The enhancement strategy was further validated using multiple semiconductor photocatalysts, including ZnO, CuO, Fe₂O₃, and ZrO₂, all of which exhibited improved photocatalytic activity under microdroplet-assisted conditions. In addition, efficient pollutant degradation was achieved in real river water samples, demonstrating good system stability and practical applicability. This work highlights microdroplet-induced interfacial electric field coupling as an effective approach for boosting photocatalytic efficiency, offering new insights for the design of advanced photocatalytic systems for environmental applications.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 11
·646
·
IF 3.5
Xiao Yongbo,Gao Yanjiao,Bai Fan,Xiao Jing
The increasing contamination of aquatic environments by antibiotics calls for efficient, economical, and environmentally sustainable remediation technologies. This study presents a zero-valent iron (ZVI)-activated periodate (IO 4 − ) advanced oxidation system for the degradation of oxytetracycline (OTC) in water. Under optimized conditions (pH = 3, ZVI = 1.64 g/L, IO 4 − = 1.97 mM), the ZVI/IO 4 − system achieved 81.16% OTC removal. Notably, coupling with UV irradiation enabled complete OTC degradation within 50 min, demonstrating substantial enhancement over the standalone system. Mechanistic investigations revealed that IO 3 • , 1 O 2 , and O 2 •− were the dominant reactive species, and three degradation pathways were proposed based on LC–MS analysis. The system exhibited excellent performance in real water matrices, achieving 78.0% and 71.9% OTC removal in tap water and lake water, respectively, along with strong tolerance to coexisting ions and humic acid. Importantly, the ZVI catalyst retained 96.4% of its initial activity after five consecutive cycles, significantly reducing operational costs and secondary pollution risks. This work provides an efficient, stable, and cost-effective treatment strategy for antibiotic-contaminated water, holding strong promise for practical engineering applications.
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ACS Catalysis
·
2026
·
IF 13.6
Xin Han,Shanguang Xu,Fan Zhang,Ruiying Chai,Shanguo Du,Xiuling Jiao,Dairong Chen,Jie Zhang
The modulation of catalyst surfaces with alkali metals is a key research topic in heterogeneous catalysis. This study elucidates the mechanistic role of sodium promotion in enhancing the performance of MgO-supported Pt catalysts for the selective hydrodeoxygenation (HDO) of guaiacol to phenol. The catalytic activity exhibited a distinct volcano-shaped trend as a function of sodium content, with optimal performance achieved using the Pt-5Na/MgO catalyst. Under the conditions of 280 °C and 0.1 MPa H2 pressure, the Pt-5Na/MgO catalyst achieved 98% conversion and 91% phenol selectivity. Mechanistic studies revealed that sodium modification increased the basicity of the support, and a correlation was observed between guaiacol conversion and the density of surface basic sites. Additionally, sodium addition induced electronic restructuring of the catalyst by transferring electrons from Na to Pt, which increased the electron density of Pt nanoparticles, facilitated the reduction of Pt, and generated more catalytically active Pt species. This electronic modification enhanced the hydrogen activation capacity of Pt species, while the stabilization of hydrogen species on basic sites enhanced hydrogen spillover efficiency, thereby increasing the availability of reactive hydrogen species. The findings provide insight into the design of alkali-metal-promoted Pt catalysts for hydrogenation applications.
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JOURNAL OF CEREAL SCIENCE
·
2026
·
IF 4.3
Baoqing Bai,Shijie Niu,Junnan Li,Bin Feng,Tao Bo,Jinhua Zhang,Ying Zhang,Yukun Yang
Huangjiu, an ancient Chinese alcoholic beverage, is primarily brewed through the fermentation of steamed grains using Jiuqu as starter. This study systematically investigated the effects of five nutritionally rich coarse cereals (oats, quinoa, sorghum, buckwheat and black rice) on the physicochemical, antioxidant and flavor profiles of Huangjiu (CCHJ: MQHM, MQLM, MQYM, MQGL, and MQKQ) fermented with Maiqu . The results demonstrated that five types of CCHJ samples exhibited strong antioxidant capacity, with MQLM and MQHM showing particularly high α-glucosidase inhibition rates, exceeding 95%. Functional component analysis revealed that MQHM contained the highest levels of amino acids, total flavonoids and polyphenols, while MQKQ exhibited the highest organic acid content. A total of 203 volatile flavor compounds (VFCs) were identified, with MQGL having the highest concentration, followed by MQHM. Furthermore, 12 common compounds, including ethanol, isopropanol, acetoin, 4-ethyl-2-methoxyphenol, ethyl palmitate, 3-methyl-1-butanol, 2-methoxy-4-vinylphenol, (S)-2-heptanol, phenethyl alcohol, 3,4-dimethylbenzaldehyde, methanol, and octanoic acid, were identified as key aroma compounds in CCHJ samples based on their odor activity value (OAV). The distinctive sweet profile of MQHM was strongly correlated with these compounds. These findings provide valuable insights into how to optimize the use of traditional coarse cereals and advancing the development of novel functional Huangjiu products.
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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Jiana Jing,Yingying Du,Chunhong Fu,Jiangli Sun,Ge Song,Minghua Zhou
Energy-efficient treatment of chloride-containing coal chemical wastewater remains challenging, primarily due to high electricity demand, limited current utilization, and concerns over by-product control. Herein, a chlorine-mediated paired electrocatalysis was established, coupling a mixed metal oxide (MMO) anode with a natural air-diffusion cathode (NADE) in a membrane-separated dual-chamber reactor. In the anode chamber, phenol and ammonia nitrogen (NH 3 -N) were proved to be oxidized via a free-radical pathway ( • ClO) and a non-radical pathway (HClO), while hydrogen peroxide (H 2 O 2 ) was produced through the aeration-free oxygen reduction reaction in the cathode chamber. Key parameters of the process and membrane materials were investigated and optimized. Proton exchange membrane (PEM), cation exchange membrane (CEM), and bipolar membrane (BPM) were compared, and PEM exhibited the highest current efficiency (93.48 %) and lowest specific energy consumption for H 2 O 2 generation (3.79 kWh/kg). Under the optimal conditions, the process achieved removal efficiencies of 95.25 % for phenol, 75.43 % for chemical oxygen demand (COD), 70.79 % for NH 3 -N, and 65.17 % for total nitrogen within 90 min. The cumulative concentration of H 2 O 2 reached 761.21 mg/L, and the associated economic benefit completely offset the energy consumption of the integrated electrocatalytic system. Overall electricity costs of the paired electrocatalysis were reduced by ∼59 % versus anodic oxidation alone and by ∼45 % versus single-pollutant operation. The chlorine-mediated paired electrocatalysis enables simultaneous degradation of phenolic and nitrogenous pollutants and in-situ H 2 O 2 generation, providing an energy-efficient and economically favorable strategy for advanced treatment of coal-chemical wastewater.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Xue Bai,Juan Shi,Lu Xu,Xin Jin,Xuan Shi,Pengkang Jin
To overcome the shortcomings of homogeneous Fe ion activating peroxymonosulfate (PMS), such as high pH-dependence, limited cycling of Fe(III)/Fe(II) and sludge production, graphite carbon nitride (g-C 3 N 4 ) is chosen as a support for Fe ions, and reduced graphene oxide (rGO) is employed to facilitate the electron transfer process, thereby enhancing catalysis. Herein, a ternary catalyst, Fe-g-C 3 N 4 /rGO, is first applied under lightless condition for PMS activation , which exhibits ideal performance for contaminant mineralization. 82.5 % of the total organic carbon (TOC) in 100 mL of 5 mg/L bis -phenol A (BPA) was removed within 20 min by the optimal catalyst named 30%rFe 0.2 CN, which shows a strong pH adaptability over the range of 3–11 compared with a common Fenton-like system. Moreover, the highly stable Fe-g-C 3 N 4 /rGO/PMS catalytic system resists complex water matrices, especially those with high turbidity . To unveil the mechanism of PMS activation and pollutant degradation , the physicochemical properties of the as-prepared catalysts are comprehensively characterized by multiple techniques. The Fe(III) contained in both the Fe-N group and α-Fe 2 O 3 component of 30%rFe 0.2 CN not only directly reacts with PMS to produce sulfate radicals ( SO 4 − ) and hydroxyl radicals ( OH), but also combines with PMS to form the essential [Fe(III)OOSO 3 ] + active complex, thereby generating superoxide radicals ( O 2 − ) and singlet oxygen ( 1 O 2 ). Among the various reactive oxidizing species, 1 O 2 plays an important role in pollutant removal , which is additionally generated by the C O moiety of the catalyst activating PMS as well as PMS self-oxidation, indicating the dominance of the non-radical pathway in the pollutant degradation process. Due to the advantages of high efficiency, wide pH adaptability and stability, the proposed lightless Fe-g-C 3 N 4 /rGO/PMS catalytic system represents a promising avenue for practical wastewater purification.
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