APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Yawen Cai,Yifeng Zhang,Zhimin Lv,Shuo Zhang,Feixue Gao,Ming Fang,Mingguang Kong,Peisheng Liu,Xiaoli Tan,Baowei Hu,Xiangke Wang
In this work, a highly efficient uranium extraction method from water by the piezo catalytic reduction-oxidation process is reported by utilizing a hollow cubic shaped Zn 2 SnO 4 /SnO 2 as piezo catalyst. The electrons and holes in Zn 2 SnO 4 /SnO 2 are separated efficiently under the irradiation of ultrasound. After that, some of the piezo electrons reduce the adsorbed U(VI) to UO 2 , the others react with soluble oxygen to form H 2 O 2 , and oxidize UO 2 to generate (UO 2 )O 2 ∙2H 2 O, which could be efficiently separated from the solution. U(VI) piezo catalytic extraction rate could reach ~ 90% under the irradiation of ultrasonic waves (40 kHz, 120 W) within 5 h and only decreased by ~ 3% after four cycles. The present work advances piezo catalysis as a new route for uranium extraction from water, which may be applied in the extraction or removal of U(VI) in the U-containing wastewaters, providing new opportunities for resource-saving and environmental enhancement.
研究领域:
环境科学
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材料科学
·
核工程
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产品关联
DOI
高影响因子
ATMOSPHERIC ENVIRONMENT
·
2025
·
IF 3.7
Yu Lu,Lingdong Kong,Jiandong Shen,Beibei Liu,Yixuan An,Yuwen Wang,Jie Tan,Lin Wang
H 2 O 2 -driven oxidation has been considered to be the main cause of sulfate formation in haze events. However, field observations have confirmed that the known H 2 O 2 sources cannot explain its ambient levels. In this study, the photochemistry of acetylacetone (AA), a ubiquitous β-diketone in the atmosphere, was investigated under ultraviolet (UV) irradiation using droplets formed in-situ by deliquescence of hygroscopic ammonium sulfate ((NH 4 ) 2 SO 4 ) and sodium dihydrogen phosphate (NaH 2 PO 4 ). Special emphasis was placed on elucidating its contributions to H 2 O 2 formation and SO 2 oxidation under varying conditions. Results show that AA photolysis significantly boosted H 2 O 2 production. In (NH 4 ) 2 SO 4 droplets, H 2 O 2 peaked early after UV irradiation, while in NaH 2 PO 4 droplets, it reached fourfold higher and peaked later because phosphate promotes the AA photolysis. Hydrogen atom donors like citric acid redirected radical termination from H 2 O 2 to organic hydroperoxides (ROOHs). Cl − and Br − altered radical processes: Cl − suppressed H 2 O 2 production but enhanced ROOHs production, while Br − exhibits stronger, concentration-dependent effects on both species. SO 2 oxidation was achieved by various oxidizing species such as H 2 O 2 and ROOHs produced during AA photolysis. Key products such as pyruvic acid, peroxyacetic acid and propanedioic acid were identified and possible UV-driven reaction pathways were revealed. These results uncover new H 2 O 2 production and sulfate formation pathways, and show the complexity of aerosol-phase photochemistry. This work improves our understanding of atmospheric H 2 O 2 source and redox processes, offering new insights for the oxidation potential of atmospheric organic aerosols and atmospheric oxidation capacity, and enhancing atmospheric chemistry models to better predict air quality and climate.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Tong Wang,Mengting Xiu,Yanyan Zhang,Zhiyu Zheng,Yilu Zheng,Jianxiang Xu,Limin Zhu
Chemodynamic therapy (CDT) shows significant promise for cancer treatment. However, the low endogenous hydrogen peroxide (H 2 O 2 ) levels within tumors frequently constrain the efficacy of CDT. To address this limitation, we developed a H 2 O 2 -self-supplying cascade nanocomposite, MgO 2 @CuFe 2 O 4 @PEG (designated MCuFeP), capable of generating H 2 O 2 in situ through MgO 2 decomposition in the tumor microenvironment. The CuFe 2 O 4 converted the self-supplied H 2 O 2 into cytotoxic reactive oxygen species (ROS) via Fenton and Fenton-like reactions. Furthermore, MCuFeP exhibited pronounced photothermal effects under near-infrared (NIR) irradiation, directly ablating tumor cells and significantly accelerating the catalytic reaction. In vitro studies confirmed that MCuFeP generated substantial heat and ROS upon NIR irradiation. Notably, the nanocomposite demonstrated cytocompatibility with healthy L929 cells while selectively inducing death in cancerous 4 T1 cells and the effect was enhanced by NIR irradiation. In the subcutaneous syngeneic 4 T1 tumor model mice, MCuFeP + NIR inhibited tumor growth over the 14-day treatment period. Histopathological analysis showed damage to tumor cells without significant toxicity to major organs, and hemocompatibility assessment confirmed favorable blood compatibility. Collectively, these results demonstrate that MCuFeP is a highly promising nanocomposite for the development of novel combinatorial cancer therapies.
研究领域:
纳米医学
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癌症治疗
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活性氧
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光热治疗
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化学动力学治疗
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产品关联
DOI
高影响因子
TETRAHEDRON LETTERS
·
2018
·
IF 2.125
Rongxing Zhang,Shengzhou Jin,Yuanxing Wan,Sen Lin,Zhaohua Yan
A novel, efficient, and green protocol to construct C–S bond has been developed via HBr/H 2 O 2 -mediated sulfenylation of styrenes and 4-hydroxycoumarins leading to unsymmetrical sulfides. Various unsymmetrical sulfides were prepared in one step with moderate to good yields using environmentally-friendly H 2 O 2 as oxidant and HBr as catalyst. Based on the preliminary experimental results, a plausible reaction mechanism was proposed for HBr/H 2 O 2 -mediated formation of C–S bond with thiosulfates .
研究领域:
有机化学
·
绿色化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Weiwen Hao,Ziyu Pei,Yihao Wen,Weidong Hou,Liang Wang,Zhenhui Kang,Cheng Zhu
Phosphate-mediated interfacial Al–O–P–N bonding enables robust anchoring of P-doped carbon nitride film onto alumina panels. • Spatially separated CN=O and CN–P sites drive dual-channel 2e – WOR and ORR pathways for selective H 2 O 2 photosynthesis. • A flow reactor with 9 photocatalytic panels produces H 2 O 2 at a rate of 2066.68 μmol h –1 m –2 under simulated sunlight. • The flow reactor retains 97.0% H 2 O 2 production activity after ten consecutive cycles. • The flow reactor shows great potential for environmental remediation by achieving 98.52% MB degradation within 30 min. The practical deployment of photocatalytic H 2 O 2 synthesis is severely hindered by the reliance on suspended powder catalysts, which suffer from aggregation, catalyst loss, and limited compatibility with continuous-flow reactor systems. Herein, we report a phosphate-bridged monolithic photocatalytic platform in which P-doped carbon nitride is directly integrated with α-Al 2 O 3 substrates through covalent Al–O–P–N interfacial linkages. During growth, phosphate simultaneously mediates catalyst-substrate coupling, phosphorus incorporation, and defect engineering, thereby enabling robust catalyst immobilization together with optimized charge transport and interfacial reaction kinetics. The resulting monolithic photocatalytic panels exhibit exceptional mechanical stability and near-lossless recyclability, minimizing catalyst detachment and recovery losses during continuous-flow operation. Experimental characterizations and density functional theory calculations reveal spatially separated catalytic centers, where defect-derived CN O sites preferentially drive the two-electron water oxidation reaction while phosphorus-substituted CN-P sites promote the 2e − oxygen reduction reaction, collectively enabling dual-channel H 2 O 2 photosynthesis. Under simulated sunlight, a continuous-flow reactor assembled with 9 monolithic panels achieves a H 2 O 2 production rate of 2066.68 μmol h −1 m −2 , while maintaining nearly unchanged activity after ten operational cycles. As a proof-of-practicality demonstration, the same monolithic reactor also enables rapid MB degradation under continuous-flow conditions. This work establishes a scalable photocatalytic platform that bridges the gap between laboratory-scale powder photocatalysts and practically deployable solar-driven H 2 O 2 production systems.
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DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Aili Yuan,Tengfei Huang,Yanzhen Guo,Yaru Wei,Huili Liu,Baocheng Yang,Binbin Chang
The integrated dual-channel pathway is regarded as an ideal process for photocatalytic H2O2 production. However, it is a key scientific challenge to rationally design photocatalysts for achieving H2O2 production through such a dual-channel pathway. Here, we designed surface oxygen vacancy-modified BiOIO3 (BIO-OVs-x) with spatially separated redox reaction centers by constructing a facet heterojunction for directly utilizing O2 and H2O to photosynthesize H2O2. Under white light irradiation, optimal BIO-OVs-2 exhibited the highest H2O2 production rate of 215.5 μmol g–1 h–1, which was 3 times more than that of BiOIO3, as well as an apparent quantum yield of 5.76% at 350 nm. Photoelectrochemical experiments confirmed that the introduction of oxygen vacancies boosted the efficiency of charge separation and transfer and adjusted the band structure. Control experiments and theoretical studies elucidated photocatalytic reaction active sites and the charge transport mechanism of BIO-OV catalysts. More importantly, the introduction of oxygen vacancies in BiOIO3 reduced the free energy for OH* of the water oxidation reaction and promoted the occurrence of the water oxidation reaction. This work provides a valuable basis for the fine design of a high-performance photocatalyst and for understanding the mechanism of hydrogen peroxide production.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Lanlan Xu,Bingyu Yang,Liangqia Guo
Herein, oxidized 3,3′,5,5′-tetramethylbenzidine (oxTMB) nanobelts were developed to enhance the colorimetric and paper-based sensing of H 2 O 2 . It was found that the minor component of Fe 2+ in Na 2 SO 4 reagent could catalyze the oxidization of TMB by H 2 O 2 into positively charged oxTMB, which was further assembled into dark blue oxTMB nanobelts via electrostatic interaction with SO 4 2− . The extinction originating from the absorption and scattering of oxTMB nanobelts was utilized to quantitatively detect H 2 O 2 with a wide linear detection range (1.0–300 μM) and a low limit of detection (0.48 μM). In addition, no coffee-ring effect was observed in the test zone of the paper-based colorimetric array, which was beneficial to judge the color by naked eye. Finally, the colorimetric method was applied to detect H 2 O 2 in contact lens care solution. This work not only proposed a new colorimetric sensing platform for H 2 O 2 , but also highlighted the minor component in the reagent might influence the experimental result.
研究领域:
分析化学
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生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 6
·3335-3342
·
IF 3.591
Yating Xu,Hanping Fu,Ling Zhao,Lishan Jian,Qingshuang Liang,Xiufeng Xiao
Hydrogen peroxide is an important high-energy product widely used in various fields. Highly efficient semiconductor photocatalysts, especially those that can produce H2O2 both from water oxidation and O2 reduction, are eagerly desired. In this work, BiOCl nanosheets with preferentially exposed (001) and (010) facets were synthesized via a simple hydrothermal method. The facet-dependent photocatalytic H2O2 generation activities of these BiOCl nanosheets were assessed. The hydrogen peroxide evolution rate of BiOCl(001) is about 2-fold higher than that of BiOCl(010), which is assigned to the higher separation efficiency of photogenerated charge carriers. Interestingly, both the EPR study and active species trapping experiments demonstrate that the generation of H2O2 on the BiOCl(001) photocatalyst mostly originates from sequential two step single-electron O2 reduction, while there are two pathways for photocatalytic H2O2 production on BiOCl(010), from both oxygen reduction and water oxidation. This work offers a new strategy to pursue highly efficient semiconductor photocatalysts with two pathways for H2O2 production from both water oxidation and O2 reduction.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xiaoying Zhang,Peizhe Sun,Kajia Wei,Xia Huang,Xiaoyuan Zhang
Some uses of biochar/H 2 O 2 in the removal of organic pollutants from sewage have made the advanced oxidation of pharmaceuticals and personal care products by modified biochar possible. However, little is known about the performance of modified biochar and the mechanism of this process. Herein, the activation of H 2 O 2 by Fe-impregnated biochar (FBC, produced from maize straw, wheat straw and peanut shell) was studied, and the removal of sulfamethoxazole (SMX) was specifically investigated. The results show that Fe-impregnated biochar had the ability to activate H 2 O 2 and degrade SMX and its performance was better than that of the original biochar. With the increase of pyrolysis temperature from 350 °C to 700 °C, Fe-impregnated maize straw (1 g/L) enhanced the decomposition of H 2 O 2 (3 mM) from 66% to 99% within 2 h. The degradation of SMX (10 μM) by FM700/H 2 O 2 within 2 h reached 100%, which was approximately 3 times of that of the original biochar. The mechanism of activation-degradation was elucidated by electron paramagnetic resonance (EPR). The results show that the interaction of H 2 O 2 with C-OH promoted the generation of HO and that HO and non-radical sites jointly attacked SMX to degrade it. Impregnation with Fe not only increased the specific surface area of the biochar but also provided more active sites to activate H 2 O 2 and degrade SMX.
研究领域:
环境科学
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污染控制
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材料科学
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Dagang Liu,Yu Chang,Donglin Tian,Wenqi Wu,Ang Lu,Nana Prempeh,Meijuan Tan,Yifeng Huang
H 2 O 2 hydrolysis of mechanically-defibrillated chitin nanofibrils was explored as a green way of fabricating rod-like chitin nanocrystals (H 2 O 2 -hydrolyzed CHNs) that have an average length of 350 nm and width of 40 nm. We investigated the structure and morphology of CHNs as well as the rheology and lyotropic self-assembly behavior of its colloidal dispersions. The results show that although H 2 O 2 -hydrolyzed CHNs maintained the crystalline structure of α-chitin, surface charge of the nanorods was switched from positive to negative. As a consequence, the colloidal nanocrystals were well-dispersed in neutral or alkaline aqueous media, and behaved as a lyotropic liquid crystal between two critical concentrations. It is interesting that lyotropic liquid crystal transition was a spontaneously self-assembly from well-aligned nanofibers, to nanobelts, and to multi-layered lamellae. At high critical concentration, H 2 O 2 -hydrolyzed CHN colloids exhibited a sol-gel transition, which was discovered to be highly dependent on the storage time, concentration, temperature, and surface charge density. It is also suggested that nematic mesophases rather than gel could be effectively maintained by improving the surface charge density or lowering the aging temperature and colloidal concentration of CHNs.
研究领域:
材料科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xue Xiao,Tianjiao Wang,Juan Bai,Fumin Li,Tianyi Ma,Yu Chen
Selective hydrogen peroxide (H2O2) electrogeneration by oxygen reduction reaction (ORR) is an efficient and promising synthetic method for H2O2 production. Herein, we build a particular inorganic–organic interface to enhance the electrocatalytic selectivity of reduced graphene oxide (rGO) aerogels for H2O2 electrogeneration by modifying rGO aerogels with polyethyleneimine (PEI). The three-dimensional porous structure of aerogels and the steric hindrance effect of PEI on rGO endow PEI-functionalized rGO (rGO/PEI) aerogels with enhanced selectivity (90.7%), production rate (106.4 mmol gcat–1 h–1), and durability for H2O2 electrogeneration by the two-electron pathway of ORR.
研究领域:
化学
·
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
Nano Research
·
2021
·Vol. 16
·期 4
·4506-4514
·
IF 8.897
Yang Yi,Cheng Bei,Yu Jiaguo,Wang Linxi,Ho Wingkei
Photocatalytic production of hydrogen peroxide (H 2 O 2 ) is an ideal pathway for obtaining solar fuels. Herein, an S-scheme heterojunction is constructed in hybrid TiO 2 /In 2 S 3 photocatalyst, which greatly promotes the separation of photogenerated carriers to foster efficient H 2 O 2 evolution. These composite photocatalysts show a high H 2 O 2 yield of 376 µmol/(L·h). The mechanism of charge transfer and separation within the S-scheme heterojunction is well studied by computational methods and experiments. Density functional theory and in-situ irradiated X-ray photoelectron spectroscopy results reveal distinct features of the S-scheme heterojunction in the TiO 2 /In 2 S 3 hybrids and demonstrate charge transfer mechanisms. The density functional theory calculation and electron paramagnetic resonance results suggest that O 2 reduction to H 2 O 2 follows stepwise one-electron processes. In 2 S 3 shows a much stronger interaction with O 2 than TiO 2 as well as a higher reduction ability, serving as the active sites for H 2 O 2 generation. The work provides a novel design of S-scheme photocatalyst with high H 2 O 2 evolution efficiency and mechanistically demonstrates the improved separation of charge carriers.
研究领域:
材料科学
·
化学
·
催化
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）