Carbon Capture Science & Technology
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2025
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IF 10.5
Tingwei Wang,Xuelong Quan,Zhiqiang Sun,Zhao Sun
Excessive CO 2 emissions lead to a gradual increase in global average temperatures and an increased frequency of extreme weather events. Exploiting advanced materials for CO 2 capture has become a key issue of concern to all countries. In this study, a new biomass carbonization strategy, co-modification by H 2 O 2 and KOH, is proposed to prepare microporous biochar from pine sawdust with high CO 2 adsorption capacity. Results indicate that the co-modification strategy can produce biochar with a specific surface area as high as 3522.7 m 2 /g (with a micropore ratio of 90.3%), which increases by 56.7% compared to the biochar produced by biomass carbonization without H 2 O 2 treatment. The adsorption properties of the co-modification-derived biochar are investigated by CO 2 -TPD and TG, and the biochar exhibits a maximum CO 2 adsorption capacity of 6.60 mmol/g at 30°C and retains over 91.2% of this capacity after 10 cycles. It is revealed that H 2 O 2 -KOH modification can significantly promote the physisorption capacity of the biochar, highlighting the enhanced CO 2 capture efficiency due to alkaline hydrogen peroxide treatment on the biochar and its enhancement in CO 2 capture.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Tianchang Miao,Ximeng Lv,Fangshuai Chen,Gengfeng Zheng,Qing Han
Achieving O 2 photoreduction to H 2 O 2 with high selectivity control and durability while using easily accessible catalyst requires new synthesis strategies. Herein, we propose an asymmteric Sb coordination active center strategy of introducing anthraquinone (AQ) and heptazine to form local N 3 − Sb − O coordination by a rapid and simple explosive crystallization approach, resulting in a mesoporous conjugated heptazine-amide-AQ polymer coordinated Sb (HAAQ-Sb). It is demonstrated that the N 3 − Sb − O coordination effectively suppresses the charge recombination and acts as the highly active site for O 2 adsorption. Moreover, as-introduced AQ units initiate low-barrier hydrogen transfer through a reversible redox process that triggers highly-efficient H 2 O 2 production. A superior apparent quantum yield of 20.2 % at 400 nm and a remarkable solar-to-chemical conversion efficiency of 0.71 % are achieved on the optimal HAAQ-Sb, which is the highest among C 3 N 4 -based photocatalysts at present. This asymmetric coordination concept and material design method provide new perspectives for the research of novel catalysts toward artificial photosynthesis.
研究领域:
材料科学
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光催化
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化学工程
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DOI
PubMed
高影响因子
Marine Drugs
·
2024
·Vol. 22
·期 11
·499
·
IF 4.9
Biyang Zhu,Jiacheng Wang,Lijun You,Lianzhu Lin,Kuncheng Lin,Kseniya Hileuskaya
Calcium-chelated polysaccharides have been increasingly considered as promising calcium supplements. In this study, degraded fucoidans (DFs) with different molecular weights (Mws) were prepared after UV/H2O2treatment; their calcium-chelating capacities and intestinal absorption properties were also investigated. The results showed that the calcium-chelating capacities of DFs were improved with a decrease in Mw. This was mainly ascribed to the increased carboxyl content, which was caused by free-radical-mediated degradation. Meanwhile, the conformation of DF changed from a rod-like chain to a shorter and softer chain. The thermodynamic analysis demonstrated that DF binding to calcium was spontaneously driven by electrostatic interactions. Additionally, DF-Ca chelates with lower Mw showed favorable transport properties across a Caco-2 cell monolayer and could effectively accelerate the calcium influx through intestinal enterocytes. Furthermore, these chelates also exhibited a protective effect on the epithelial barrier by alleviating damage to tight junction proteins. These findings provide an effective free-radical-related approach for the development of polysaccharide-based calcium supplements with improved intestinal calcium transport ability.
研究领域:
食品科学
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营养学
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生物化学
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 11
·1-9
·
IF 5.3
Wang Yueliang,Chen Xiying,Tao Zhanhui,Zhou Jingya,Sun Hanyue,Li Xian,Shi Liyu,Liu Yaqing
A novel glow-type chemiluminescence (CL)-based nanosensing system was developed for sensitive and rapid point-of-care testing (POCT) of H 2 O 2 in food. CuSe nanoparticles (CuSe NPs ) have excellent peroxidase-like activity. After being modified with thiols of 4-mercaptophenylboronic acid (MBA) (CuSe NPs @MBA), luminol can be catalyzed to produce long-lasting CL in the presence of H 2 O 2 . The possible reason for the long-lasting glow-type CL behavior was explored. Under the optimized condition, H 2 O 2 can be sensitively detected with improved repeatability. The limit of detection is as low as 0.30 μM. To meet the requirement of in situ and outside of laboratory detection, a 3D-printed portable device was designed which can eliminate the environmental interference to improve detection accuracy. The developed multifunctional platform also has the advantages of simple operation and low cost, suggesting its great potential for applications in food and agricultural fields. Graphical
研究领域:
分析化学
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食品安全
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生物医学工程
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Chuan Jiang,Zuheng Jin,Sha Wu,Zhihong Zhu,Jiangtao Wu,Bing Su,Changzheng Hu,Laijun Liu,Liang Fang,Zhenxiang Cheng
Hydrogen peroxide (H2O2) plays a pivotal role in multiple industries, spanning healthcare, energy, chemical synthesis, and environmental protection, yet achieving its safe, ecofriendly, simple, and efficient production under ambient conditions remains challenging. In contrast to traditional piezoelectric and photocatalysis techniques, tribocatalysis has recently attracted attention owing to its mild requirements and low energy consumption. Thus, in this study, we synthesized BaxSr1–xNb2O6 (x = 0.4, 0.5, 0.6, 0.7) (BSN) ferroelectric nanopowders via solid-phase synthesis and high-energy ball milling to investigate the impact of BSN tribocatalysis on H2O2 production. Our findings reveal that H2O2 can be efficiently synthesized through a tribocatalysis pathway at room temperature and normal pressure by exerting mechanical force during physical contact between BSN particles and deionized water/O2 interfaces. This interaction induces electron transfer, leading to the generation of reactive free radicals (•OH and •O2–). Subsequently, these free radicals combine to form H2O2 (2•OH → H2O2, •O2– + e– + 2H+ → 2H2O2). Our results demonstrate that strong ferroelectric properties can enhance the catalytic capability for H2O2 production. Furthermore, the efficiency can be significantly enhanced by facilitating the passage of O2 and incorporating a sacrificial agent, resulting in a high production rate up to 952.65 μmol L–1 h–1. This study presents a new and efficient method for preparing hydrogen peroxide.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
PHYSICA SCRIPTA
·
2024
·Vol. 99
·期 8
·085914
·
IF 2.6
Yajun Xu,Qichen Zhao,Jianian Chen,Jingzhe Zhang,Binbin Xu
In recent years, graphene oxide assisted etching silicon has been considered a potential method to replace metal-assisted chemical etching. This work demonstrated the catalytic ability of graphene oxide synthesized by the Hummers method to promote chemical etching of silicon. By adjusting HF/H2O2 ratio of the solution and reaction temperature, a minimum weighted average reflectance of 9.9% in the wavelength range of 300–1100 nm was obtained. An etching rate of 10 μm h−1, faster than those in others' reports, was obtained in an optimized acidic solution at 80 °C. Finally, a four-electron model for graphene oxide assisted etching mechanism was proposed to explain our research results.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Xuan Chen,Zheng Chen,Lang Wu,Feifei Hu,Xin Zhou,Qian Lin,Hongyan Pan,Yongyong Shi,Donghai Jiang
Using an l-arginine (LA)-functionalized Pd–Ni catalyst, hydrogen peroxide (H2O2) was directly synthesized via a self-designed microreactor at ambient temperature and pressure. The yield of H2O2 achieved 574.31g kgcat–1 h–1, with the concentration of H2O2 in the solution reaching 4.05 wt % per hour. After five cycles and online activation, the LA functionalized Pd–Ni catalyst maintained high H2O2 catalytic activity. The catalytic activity evaluation experiments, characterization results, and simulation studies demonstrated that Ni doping and LA-functionalization synergistically modulate the electronic structure of the active Pd component. This modulation increases the concentration of Pd2+ at the active sites, effectively inhibits the dissociation of the O–O bond in O2*, OOH*, and HOOH* species, thereby enhancing the catalytic performance for H2O2 production. This study proposes a systematic strategy for the design of Pd-based catalysts to directly synthesize highly efficient H2O2.
研究领域:
催化化学
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材料科学
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环境化学
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DOI
PubMed
高影响因子
Foods
·
2026
·Vol. 15
·期 3
·595
·
IF 6
Jiaoling Wang,Hao Li,Xinxin Wu,Xindong Wang,Xinai Zhang
Considering the demand for nutritional assessment and product quality control in the tea industry, this work develops an effective electrochemical sensor based on gold nanoparticles electrodeposited onto a zeolitic imidazolate framework (Au/MOF(Zn)) for evaluating the antioxidant activity of tea subjected to microwave-assisted drying (MAD) through hydrogen peroxide (H2O2) scavenging. The MOF(Zn) enables uniform deposition of AuNPs, which significantly enhances the electrocatalytic oxidation of H2O2. The fabricated sensor exhibits a wide linear detection range from 400 μM to 1.8 mM for H2O2with a correlation coefficient of 0.9983. The experimental results demonstrate acceptable selectivity, with signal interference <5% from common tea compounds like inorganic ions, sugars, and organic acids. Electrochemical methods, including cyclic voltammetry (CV) and differential pulse voltammetry (DPV) analysis, were employed to quantify H2O2by measuring oxidation currents in phosphate-buffered saline (PBS, pH 7.0). The relative standard deviation (RSD) for repeatability and reproducibility was 5.1% and 6.8%, respectively, confirming high reliability. This sensor was successfully applied to assess antioxidant capacity in tea extracts obtained from fresh leaves subjected to microwave-assisted drying under varying power and duration. Results indicate that increasing microwave power enhances antioxidant activity, while prolonged drying at low power initially increases activity (peaking at 120 s) but reduces it upon extended exposure. Optimal antioxidant preservation was achieved at 120 s. This real-time, reliable sensing strategy offers theoretical foundations for optimizing tea processing parameters to preserve bioactive compounds, particularly polyphenols like catechins, thereby improving tea quality and health benefits.
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PubMed
高影响因子
Sustainability
·
2026
·Vol. 18
·期 4
·1870
·
IF 4.1
Guodong Wan,Jiaqi Ding,Ruixin Zeng,Zhenbin Chen,Hua Li,Yujie Cheng,Zongping Wang,Pengchao Xie,Hongwei Zhang
Naproxen (NPX) is a widely occurring, refractory organic contaminant that cannot be removed by conventional water treatment processes. In response to the growing environmental pollution caused by NPX, an innovative and highly efficient green degradation method has been developed, designed on the principles of sustainability to promote long-term ecosystem health and advance a circular economy. In this study, using zero-valent molybdenum as a catalyst in combination with trivalent iron (Fe3+) and hydrogen peroxide (H2O2), we constructed a Mo/Fe3+/H2O2system to treat NPX-contaminated water. The effects of solution pH, H2O2concentration, Fe3+concentration, Mo dosage, and co-existing water-matrix constituents (Cl−, HCO3−, PO43−, NO3−, and humic acid (HA)) on NPX removal were investigated; reactive species were identified; and the reusability of Mo as well as its performance under the continuous-flow condition were evaluated. The results showed that the optimal pH was 3 and the appropriate Fe3+dosage is 100 µM. With 500 µM H2O2, 87.9% of NPX was removed within 7 min, and a moderate increase in Fe3+concentration, together with a suitable H2O2level, enhanced the removal efficiency. HCO3−, Cl−, and HA exerted slight inhibition, whereas PO43−markedly suppressed NPX degradation. Recycling tests and the 6 h continuous-flow treatment demonstrated excellent reusability and stability of Mo. Quenching experiments revealed that HO•and Fe(IV) were the dominant reactive species responsible for NPX degradation.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2026
·Vol. 93
·期 3
·318-331
·
IF 2.6
Wang Hanlin,Chu Ziyang,Li Mengxue,Chen Tianhu
View large Download slide View large Download slide Close modal Pyrrhotite (Fe 1-x S) was prepared by the pyrolysis of pyrite and the sulfidation of hematite, and subsequently used to activate H 2 O 2 for the degradation of tetracycline (TC). The pyrite-derived Fe 1-x S samples (P600 and P700) and the hematite-derived Fe 1-x S samples (S600, S700), prepared at 600 and 700 °C, respectively, were characterized using X-ray diffraction (XRD), X-ray photoelectronic spectroscopy (XRS), scanning electron microscopy (SEM) and magnetism analysis. The effects of annealing temperature, preparation method, and initial solution pH on TC degradation were systematically investigated. The results showed that the degradation of TC increased with the decrease in annealing temperature and initial solution pH. Quenching experiments and electron spin resonance (ESR) demonstrated that • OH and 1 O 2 were reactive oxygen species (ROSs) in acidic and alkaline media, respectively. Moreover, the sulfidation-derived pyrrhotite, featuring a monoclinic Fe 1-x S shell, exhibited superior catalytic performance than pyrolysis-derived pyrrhotite with a hexagonal Fe 1-x S shell. Notably, 1 O 2 was easier to produce in the P600/H 2 O 2 system. Both P600 and S600 maintained a high catalytic activity after five runs. These findings offer a novel approach for pyrrhotite preparation and promote the comprehensive utilization of pyrite and hematite. Pyrolytic pyrrhotite and sulfurized pyrrhotite were prepared by a one-step method. Sulfurized pyrrhotite exhibited superior catalytic activity than pyrolytic pyrrhotite. • OH was the dominant ROS under acidic conditions, while 1 O 2 prevailed under alkaline conditions. The magnetic pyrrhotite showed excellent reusability over five cycles.
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高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2017
·
IF 1.751
Zhonghua Wang,Haiqian Zhao,Hanbing Qi,Xiaoyan Liu,Yang Liu
Behaviours of the free radicals during the methylene blue (MB) oxidation process in the Fe2+/H2O2 system were studied to reveal the reason for the low utilization efficiency of H2O2. The roles of O2−∙, ∙OH and HO2∙ radicals were proven to be different in the MB oxidation process. The results showed that O2−∙ radicals had a strong ability to oxidize MB; however, they were not the main active substances for MB degradation due to the low concentration in the traditional Fe2+/H2O2 system. HO2∙ radicals could not oxidize MB. ∙OH radicals were the main active substances for MB oxidation. In the short initial stage, the utilization efficiency of H2O2 was high, because the generation rate of ∙OH was much higher than that of HO2∙. More ∙OH radicals were involved in the MB oxidation reaction. In the long deceleration stage (after the short initial stage), a large amount of H2O2 was consumed, but the amount of oxidized MB was very small. Most of the ∙OH radicals were consumed via the rapid useless reaction between ∙OH and HO2∙ in this stage, resulting in the serious useless consumption of H2O2. It is a feasible method to improve the utilization efficiency of H2O2 by adding suitable additives into the Fe2+/H2O2 system to weaken the useless reaction between ∙OH and HO2∙.
研究领域:
环境化学
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高级氧化技术
·
水处理技术
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DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Xiaoyuan Ji,Qian Lu,Xuhao Sun,Liyun Zhao,Yuhan Zhang,Jinshui Yao,Xian Zhang,Hui Zhao
As a nanozyme, gold nanoparticles have some advantages compared with natural enzymes, such as stable structure, adjustable catalytic activity, multifunctionality, and recyclability. Due to their special dimension, they are easy to aggregate rapidly and lose their catalytic performance when exposed to normal saline or special pH environment. To avoid such a situation, Au@PNIPAm nanozymes with core–shell structure are constructed and their mimic peroxidase and glucose oxidase enzymatic activities are investigated. Kinetic examinations manifest that Au@PNIPAm nanozymes exhibited a high affinity for 3,3,5,5-tetramethylbenzidine (TMB), hydrogen peroxide (H2O2), and glucose. These predominant peroxidase-like and glucose-like oxidase Au@PNIPAm catalytic activities are successfully used in the detection of H2O2 or glucose (LOD is 2.43 mM or 5.07 mM). Otherwise, the potential Au@PNIPAm nanozymes are provided with a clear ability for decomposing the intracellular H2O2 in living cells. And it could protect cells from oxidative stress damage with inducing by H2O2. Therefore, it is easy to consider that Au@PNIPAm nanozymes show a certain possibility to retard cell senescence and increase the production of the hydroxyl radical which could prevent carcinogenesis of the cell.
研究领域:
纳米技术
·
酶模拟
·
生物传感器
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活性氧生物学
·
生物医学工程
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DOI
高影响因子
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