APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Shuzhen Zhou,Jingyi Hao,Mengjie Zhou,Xiaoguang Qiao,Xinchang Pang
The combination of piezoelectric material and ball milling leads to new frontiers in catalysis research. Here we used piezoelectric BaTiO 3 nanoparticles as the additive for the degradation of dye pollutant in solid state in ball milling process. With the assistant of ppm level CuBr 2 and H 2 O 2 , high degradation conversion (> 99%) of dyes can be achieved in short time (10 min). BaTiO 3 nanoparticles became temporarily highly polarized particles during BM process and generated electron-hole. These particles exhibited strong reducing properties and reduced Cu(II) into the active Cu(I) species which can catalyze H 2 O 2 to generate highly active ·O 2– to enhance the dye degradation. In addition to the general applicability for different dyes and larger scales, this BaTiO 3 assist BM process was deduced to be a promising powerful platform for organic pollutant treatment in solid states.
研究领域:
环境科学
·
催化化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Zhang Yimeng,Chu Wenhai,Xu Ting,Yin Daqiang,Xu Bin,Li Pan,An Na
Hydrogen peroxide with and without activation by ultraviolet irradiation (UV/H 2 O 2 and H 2 O 2 , respectively) has been investigated to degrade emerging contaminants in drinking water. The antibiotic chloramphenicol (CAP) and its analogues (thiamphenicol and florfenicol), referred to collectively as CAPs, can produce a range of disinfection by-products (DBPs) during chlorination or chloramination (chlor(am)ination). The impact of unactivated and activated H 2 O 2 pre-oxidation on the formation of nitrogenous and carbonaceous DBPs from the chlor(am)ination of CAP model precursors was investigated. A theoretical estimated toxicity evaluation was also carried out based on the DBPs that formed. H 2 O 2 pretreatment alone did not affect organic carbon and nitrogen concentrations, but significantly reduced the formation of trichloromethane (TCM) during chlorination and trichloronitromethane (TCNM) during chloramination, and enhanced dichloroacetonitrile (DCAN) yields during chloramination. These significant changes in DBP yields caused by H 2 O 2 pre-oxidation are attributable to the transformation of the three CAPs into more reactive precursor structures. The three CAPs did not form DCAN and TCNM during chlorination, regardless of whether H 2 O 2 pre-oxidation was used. However, UV/H 2 O 2 pretreatment resulted in the unexpected formation of TCNM during chlorination. Furthermore, UV/H 2 O 2 pre-oxidation increased the formation of DCAN and TCNM, whereas it had little effect on TCM formation during chloramination. A preliminary estimated toxicity evaluation demonstrated that UV/H 2 O 2 pre-oxidation at low doses, followed by chlorination, resulted in the lowest estimated toxicity from a range of DBPs. Conversely, the estimated toxicity evaluation showed that unactivated H 2 O 2 (high dose) was preferable to UV activated H 2 O 2 for overall control of these investigated DBPs during chloramination.
研究领域:
环境科学
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公共卫生学
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DOI
高影响因子
Applied Sciences-Basel
·
2024
·Vol. 14
·期 18
·8285
·
IF 2.5
Yihang Liu,Zongmao Lu,Jiajie Wang,Jinghui Lai,Ziyang Li,Chu Zhang,Yuhang Qi
Cu interconnect chemical mechanical polishing (CMP) technology has been continuously evolving, leading to increasingly stringent post-CMP cleaning requirements. To address the environmental pollution caused by traditional post-CMP cleaning solutions, we have explored the use of photocatalytic processes to remove citric acid, which is a commonly used complexing agent for CMP. In this study, CeO2abrasives, characterized by a hardness of 5.5, are extensively employed in CMP. Importantly, CeO2also exhibits a suitable band structure with a band gap of 2.27 eV, enabling it to photocatalytically remove citric acid, a commonly used complexing agent in Cu CMP. Additionally, the integration of H2O2, an essential oxidant in Cu CMP, enhances the photocatalytic degradation efficiency. The research indicates that the removal rate of single-phase CeO2was 1.78 mmol/g/h and the degradation efficiency increased by 40% with the addition of H2O2, attributed to the hydroxyl radicals generated from a Fenton-like reaction between H2O2and CeO2. These findings highlight the potential of photocatalytic processes to improve organic contaminant removal in post-CMP cleaning, offering a more sustainable alternative to conventional practices.
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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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 43
·6536-6544
·
IF 3.382
Shaozhen Wang,Biao Zang,Yueyue Chang,Hongqi Chen
Flower-shaped zeolitic imidazolate framework-L (ZIF-L) nanostructures were synthesized by a coordination control method. The various factors influencing the growth of the flower-shaped ZIF-L include the quantity of H2O2, reaction time and temperature, and the formation process and the mechanism were investigated. The results showed that H2O2 plays an induction role in the growth of crystal nuclei. Using the cleaning regulator, H2O2, flower-like ZIF-L with a high yield was produced in a short time at room temperature, and the fluorescence enhancement products were prepared at high temperature. Meanwhile, the CO2 adsorption capacity of flower-shaped ZIF-L was 1.15 mmol g−1 at room temperature and 1 bar, which was higher than that of the two-dimensional ZIF-L. This outstanding CO2 capture performance is attributed primarily to the hierarchical flower-shaped micro/nanostructure which is resistant to leaf aggregation and stacking, thus increasing the CO2 adsorption capability. These results may open a new avenue for the development of ZIF-L nanocrystals with a controlled morphology, which will be widely applied in luminescence analysis, gas sensing, separation and storage.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Nan Zhang,Junaid Haider,Maxine Yew,Jianhua Yang,Leilei Zhu
Lytic polysaccharide monooxygenases (LPMOs) play a unique role in biomass saccharification as they catalyze oxidative cleavage of recalcitrant polysaccharides. Here, four new starch-active AA13 LPMOs were identified via phylogenetic analysis and functionally expressed in Pichia pastoris , followed by the investigation of oxidative activity towards different starch substrates. The four purified AA13 LPMOs were capable of oxidizing amylose, amylopectin and corn starch, generating soluble products. Among the four, Fv AA13, which exhibited the best oxidative activity, was further studied. Its yield of oxidized products was 1.9-fold, 1.4-fold, and 1.3-fold higher than the previously reported Nc AA13 when applied to starch substrates amylose, amylopectin, and corn starch, respectively. Furthermore, the oxidized product yield of Fv AA13 was enhanced by 2-fold when supplemented with 100 μM H 2 O 2 . Fv AA13 also enhanced the amylose degradation catalyzed by α-amylase and glucoamylase at 50 °C with an increment of the product by 1.4-fold and 1.9-fold, respectively. When combined with glucoamylase at a mass concentration ratio of 0.5:1 to 2:1, the reducing sugars released from the enzymatic degradation of amylopectin were improved by 4.5 to 9.7-fold compared to using glucoamylase alone. These findings underscored the substantial promoting effect of the supplementary Fv AA13 in amylolytic cocktails for starch saccharification.
研究领域:
生物化学
·
酶学
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产品关联
DOI
PubMed
高影响因子
ANALYST
·
2018
·Vol. 143
·期 23
·5812-5821
·
IF 3.864
Xiaohua Pan,Yan Zhang,Xiaobo Sun,Wei Pan,Jinping Wang
Since different quenching mechanisms can endow carbon dots (CDs) with diverse responsive manners, multi-mode sensing can in principle be achieved by a single carbon-dot-based sensor. In this work, green emissive CDs were prepared by simple hydrothermal pyrolysis of phenolphthalein and ethylenediamine at 180 °C for 5 h, with a quantum yield of 17%. The as-prepared CDs can be selectively quenched by Hg2+ due to their specific binding affinity causing photo-induced electron transfer (PET). Due to the inner filter effect (IFE), the CDs also showed intensive fluorescent response to lemon yellow dye. Moreover, the CDs responded to Fe2+ or H2O2 selectively in the presence of H2O2 or Fe2+ owing to oxidative quenching (OQ) by hydroxyl radicals resulting from the Fenton reaction. Via the diverse responsive manners of PET, IFE and OQ, multi-mode sensing for Hg2+, lemon yellow and Fe2+, H2O2 was thus achieved by a single green emissive carbon-dot-based sensor. Accordingly, the linear ranges for the selective detection of Hg2+, lemon yellow, Fe2+ and H2O2 were found to be 0.0–500.0, 0.0–20.0, 0.0–90.0 and 0.0–50.0 μM, with the limits of detection as low as 5.8, 0.5, 1.2 and 1.1 μM, respectively.
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2022
·Vol. 9
·期 6
·1952-1960
·
IF 9.473
Jiaqing He,Feng Gao,Haowei Wang,Fangyan Liu,Jiahui Lin,Biao Wang,Chuan Liu,Feng Huang,Zhang Lin,Mengye Wang
H2O2 is an environmentally friendly chemical for wide water treatments and H2 is regarded as an ideal substitute for traditional fossil energy. The industrial production of H2O2 is via the anthraquinone oxidation process, which, however, consumes extensive energy and produces pollution. Herein, based on the density functional theory (DFT) calculations, we report a green and sustainable piezocatalytic intermediate water splitting (IWS) process to simultaneously obtain H2O2 and H2 using C-doped KNbO3 nano single crystals as catalysts. The KNbO3 catalysts doped with suitable amounts of carbon show an enhanced water splitting rate, which could be attributed to the decreased reaction barriers on the C-KNbO3 surface and improved polarized built-in electric field, as evidenced by DFT simulations and PFM measurements. Remarkably, the piezocatalytic H2 evolution efficiency of 0.5 : 1 C-KNbO3 reaches 524.51 μmol g−1 h−1. Additionally, 0.5 : 1 C-KNbO3 could generate H2 and H2O2 simultaneously through two-electron piezocatalytic IWS reactions. This improved catalytic efficiency is attributed to the promoted piezo-response of KNbO3 after C doping, as revealed by PFM tests.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
·
IF 22.1
Xuewu Deng,Xiaobing Zheng,Feifei Jia,Cuiyao Cao,Haolei Song,Yanjun Jiang,Yunting Liu,Guanhua Liu,Shijie Li,Lihui Wang
The selective oxyfunctionalization of C-H and C C bonds is highly important and catalyzed by unspecific peroxygenases (UPOs) which suffer from inactivation by hydrogen peroxide (H 2 O 2 ). Herein, photo-enzyme integrated catalysts were constructed by immobilizing Aae UPO as cross-linked enzyme aggregates (CLEAs) in Pd-loaded three-dimensional ordered macroporous titania (3DOM TiO 2 ) with in situ photocatalytic H 2 O 2 production. The prepared Aae UPO@3DOM TiO 2 -Pd obtained higher catalytic efficiency compared with CLEAs- Aae UPO. The conversion of ethylbenzene to (R) -1-phenethyl alcohol was significantly improved, reaching 99 % compared with free enzyme (38 %) and CLEAs- Aae UPO (49 %), with ee value of > 99 %. Aae UPO@3DOM TiO 2 -Pd exhibited good stability and reusability attributed to the protection of macropores and in situ H 2 O 2 production. By using the designed 3DOM platform for photocatalysis and enzyme immobilization, the in situ photocatalytic generation of H 2 O 2 was highly efficient, and the monodisperse CLEAs- Aae UPO in the macropores facilitated the contact of substrate and enzyme, thus obtaining excellent photo-enzyme coupled catalysis.
研究领域:
生物化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Zuheng Jin,Manli Lu,Chuan Jiang,Sha Wu,Liupan Tang,Changzheng Hu,Laijun Liu,Liang Fang,Zhenxiang Cheng
Traditional methods of hydrogen peroxide (H 2 O 2 ) production, such as the anthraquinone process and electrolysis, face challenges including high costs, significant energy consumption, and strict electrode requirements. Therefore, this study proposes a mechanocatalytic approach for H 2 O 2 production. By utilizing the molten-salt method, KSr 2 Nb 3 Ta 2 O 15 ferroelectric nanorods were synthesized to achieve a mechanocatalytic H 2 O 2 yield of 117 μmol/L/h in a glass beaker equipped with a PTFE disk. Remarkably, substituting the glass beaker with a ZrO 2 ball mill for the mechanocatalytic experiments significantly increased the H 2 O 2 yield to 820 μmol/L/h. The Piezoelectric Force Microscopy (PFM), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET) analysis revealed that the inherent electric field of ferroelectric materials and the abundant specific surface area on the KSr 2 Nb 3 Ta 2 O 15 nanorod surface enhance electron transfer during the mechanocatalytic process. Rotating Ring-Disk Electrode tests indicated that the mechanocatalytic one-step two-electron pathway dominates H 2 O 2 generation through mechanocatalysis with an 85 % selectivity rate, surpassing conventional two-step one-electron pathway efficiency in oxygen reduction reaction. Output charge testing of vertical contact separation mode triboelectric nanogenerator (CS-TENG) determines the ability of a material to gain or lose electrons during friction processes. This breakthrough presents a novel and efficient method for H 2 O 2 production via mechanocatalysis. Using the molten-salt method, KSr 2 Nb 3 Ta 2 O 15 ferroelectric nanorods were synthesized, resulting in a mechanocatalytic H 2 O 2 yield of 820 μmol/L/h in a ball mill jar. Comprehensive analysis utilizing PFM, SEM, BET, RRDE, CS-TENG and by comparing the effect of mechanocatalysis with different materials demonstrated that the built-in electric field of ferroelectric materials enhance electron transfer in the mechanocatalytic process. This breakthrough presents a novel and efficient method for H 2 O 2 production through mechanocatalysis.
研究领域:
化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
Nature Synthesis
·
2024
·Vol. 3
·期 6
·763-773
·
IF 0
Dong Kai,Yao Yongchao,Li Haobo,Li Huangjingwei,Sun Shengjun,He Xun,Wang Yan,Luo Yongsong,Zheng Dongdong,Liu Qian,Li Quan,Ma Dongwei,Sun Xuping,Tang Bo
Renewable electricity-driven electrochemical nitrogen oxidation is a promising alternative to traditional Haber–Bosch and Ostwald processes to directly synthesize nitrate from nitrogen. However, its efficiency is hindered by strong competition from the oxygen evolution reaction in aqueous environments, along with a deficiency in standardized testing protocols. Here we present an efficient approach for nitrogen oxidation, substituting the oxygen evolution reaction with hydroxyl radicals (·OH) generated through hydrogen peroxide decomposition to serve as an active oxygen source. Electrochemical tests demonstrate that the nitrogen oxidation, facilitated by ·OH, can achieve a Faradaic efficiency of 25.6% and a nitrate yield of 8.3 nmol s −1 cm −2 . Furthermore, we employed in situ electrochemical mass spectrometry, gas-phase infrared and electron paramagnetic resonance spectroscopy to establish a comprehensive set of benchmarks to confirm the authenticity of nitrogen activation and to examine the reaction mechanism mediated by ·OH. Techno-economic analysis underscores the promising feasibility and sustainable economic value of the presented method.
研究领域:
环境科学
·
电化学工程
·
可持续能源
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产品关联
DOI
ACS Applied Nano Materials
·
2026
·
IF 5.8
Simin Cheng,Binqian Zhou,Fan Fang,Yunxiang Zhang,Wei Chen,Haodong Tang,Jun Tang,Xiaoqian Xu,Yiwen Li,Jiaji Cheng,Junjie Hao
Chiral vanadium oxide nanoparticles (V2O3 NPs) with different chiroptical signals were successfully prepared by employing tartaric acid, malic acid, and penicillamine as chirality-inducing agents. These chiral nanoparticles show sensitivity to pH values as they could express various optical transition modes such as charge transfer, d–d transitions, and surface plasmon resonance due to their rich electronic states, leading to tunable chiral optical activities in the UV–visible range. The different colors of V2O3 NPs with varied ligands at different pH values indicate the configuration variation of the chiral ligands as revealed by UV–visible absorption spectroscopy and circular dichroism (CD) characterizations. In addition, the as-synthesized chiral V2O3 NPs exhibit suitable properties for use as biomolecular probes and exhibit a limit of detection (LOD) of 3.185 μM for H2O2 sensing, indicating that chiral V2O3 NPs could provide a highly sensitive and real-time sensing scheme, which may provide a useful strategy for the development of chiral materials in the areas of chiroptics and biosensors.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yu Luo,Chenchen Liu,Jiahui Liu,Xueming Liu,Yang Zhou,Xinwen Ou,Bo Weng,Jin Jiang,Bin Han
Photocatalytic O 2 reduction presents a sustainable strategy for H 2 O 2 synthesis, while the in-situ decomposition of H 2 O 2 significantly deteriorates the activity and stability. Here, by introducing anthraquinone centers into covalent organic frameworks (DQTb-COFs), for the first time, we realized the suppression of in-site decomposition of generated H 2 O 2 via site-engineering of COFs. Under visible light irradiation, DQTb-COFs achieves an H 2 O 2 generation rate of 1844.1 μmol h −1 g −1 without sacrificial agents, which is about 3.4 times that of its counterpart without anthraquinone centers (DATb-COFs). The generated H 2 O 2 on DATb-COFs is readily reduced into hydroxyl radicals (•OH), which is not observable on DQTb-COFs. Experiments and calculations demonstrated that the anthraquinone centers of DQTb-COFs can enhance the generation of H 2 O 2 by facilitating the utilization of O 2 and promoting the desorption of H 2 O 2 . This work highlights how to inhibit the in-situ decomposition of H 2 O 2 via site-engineering of COFs, and blazes a new trail for highly efficient H 2 O 2 photosynthesis.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）