Carbon Neutralization
·
2023
·Vol. 2
·期 6
·738-745
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IF 0
Dabei Wu,Joseph Nzabahimana,Xianluo Hu
The development of organic lithium batteries (OLBs) offers a promising opportunity for the advancement of green and sustainable energy storage systems. However, organic cathode materials face challenges in terms of conductivity, electrochemical activity, and dissolution. Here, we address these limitations by introducing a sulfur-linked carbonyl compound called poly(dichlorobenzoquinone sulfide) (PDBS), which is polymerized in situ on reduced graphene oxide by a mixed solvent thermal method. The resulting carbonyl compound electrode materials exhibit favorable properties as organic cathode materials for OLBs. After 4000 cycles at a current density of 1000 mA g −1 , the carbonyl compound electrodes exhibit a discharge capacity of 102 mAh g −1 . This remarkable performance indicates excellent stability and long cycle life, which are crucial for practical applications. These results suggest that PDBS, a designable sulfur-linked carbonyl compound, holds great promise as an effective organic cathode material for OLBs. In addition, this work provides valuable insights into improving the electrochemical performance of organic cathode materials.
研究领域:
材料科学
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电化学
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能源存储
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纳米复合材料
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有机电极材料
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
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IF 4.9
Hui Xi,Xueqing Xu,Qian Yang,Rui Su,Hui Wang,Deshun Li,Qiyun Mu,Dan Liu,Zhiwang Yang,Ziqiang Lei
Nanosheet materials have larger specific surface area and more active sites than bulk materials. In this paper, ultrathin graphite carbon nitride (UCN) nanosheets were first prepared by a multi-step calcination method, and then Bi 2 WO 6 nanoflowers were grown in-situ on the surface of UCN by a simple hydrothermal method to synthesize ultrathin graphite carbon nitride and bismuth tungstate composite (UCN/BWO). The synthesized catalyst was applied to the photocatalytic oxidative coupling of benzylamine (BA). After reacted 5 h under light in air atmosphere, BA was almost completely converted into N -benzylidenebenzylamine, which was 3.8 times higher than that of bulk graphite carbon nitride (BCN). The enhanced photocatalytic activity was not only attributed to the thin nanosheet structure of UCN which shortened the migration distance of photogenerated electrons, but also because the construction of Z -scheme heterojunction that inhibited the recombination of photogenerated carriers and improved the oxidation ability of the catalyst. Based on density functional theory (DFT) calculation and photoelectric performance test, the existence of Z -scheme heterojunction was proved. Combined with the active species capture experiments, the pathway of electron transfer in the reaction process and the possible reaction mechanism were proposed.
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Journal of Materiomics
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2024
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IF 8.4
Xin Zhou,Chenbin Ai,Xiaojing Wang,Zhen Wu,Jianjun Zhang
Pure ZnO exhibits low photocatalytic H 2 O 2 production activity due to the rapid charge recombination. To realize the spatial separation of photogenerated electrons and holes, constructing an electron transfer channel on the ZnO surface is an effective approach. This study successfully modified the surface of ZnO using F – (ZnO/F) by introducing NH 4 F in an aqueous phase photocatalytic system. The F – is adsorbed on the ZnO surface by Coulombic force and significantly improves the photocatalytic H 2 O 2 production performance of ZnO, with the highest efficiency of 4137.2 μmol·g –1 ·L –1 ·h –-1 . The photocatalytic performance enhancement mechanism of ZnO/F is explained in terms of electron transfer dynamics by femtosecond transient absorption spectroscopy (fs-TAS) measurements. F – surface modification constructs a new ultrafast electron transport pathway from the ZnO CB to F – , and the optimal ZnO/F exhibits the fastest interfacial electron transfer lifetime of 5.8 ps. The F – surface modification effectively facilitates the charge separation, thereby increasing the number of electrons available for photocatalytic H 2 O 2 reaction. This study has revealed the roles of F – surface modification in the photocatalytic H 2 O 2 production by ZnO and provides guidance for ionic modification to improve photocatalytic performance.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Wenyuan Zhou,Wenjuan Li,Aiping Deng,Yelin Han,Yajie Li,Yajun Gao,Qin Hu,Guoqiang Zhu,Zhenquan Yang
Although bacteriophages (phages) are ideal biorecognition elements employed for Staphylococcus aureus detection, existing single-phage-based approaches are limited by the specific affinity of phages and false-negative results. To develop an improved phage-based colourimetric detection system and investigate its detection mechanism, we prepared a phage cocktail composed of three S. aureus phages (SapYZU10, SapYZU11, and SapYZUM13), immobilised it on Co-Mn nanozymes, and applied it to S. aureus for evaluation. The phage cocktail@Co-Mn demonstrated a sensitive, specific, and fast colourimetric evaluation of live S. aureus counts in approximately 17 min, with a detection limit of 92 CFU/mL. Moreover, the phage cocktail@Co-Mn was successfully used to detect S. aureus in food samples, with recovery rates ranging from 92.21 % to 105.56 %. The phage cocktail@Co-Mn also exhibited resilience to changes in pH (3–9), five food additives, and NaCl concentration (2 %–10 %). The detection mechanism of the phage cocktail@Co-Mn involves blockage of the active sites of the nanozyme producing O 2 •– . Notably, owing to the synergistic recognition spectra of the three phages in the cocktail, the recognition rate for the strains was a remarkable 100 %, compared with the much lower recognition rates of individual phages (between 74.7 % and 76.9 %). The recognition mechanism involves adsorption between phage tail fibres and S. aureus hosts. This pioneering study revealed that the phage cocktail is an effective biorecognition element suitable for the rapid, sensitive, specific, reliable, and colourimetric detection of viable S. aureus strains in the food industry, providing innovative directions for the phage-based detection methods.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Min Tang,Wu Liu,Jinquan Wan,Shiyu Zuo,Zhiyong Wang,Rui Peng
Fenton-like oxidation is often hampered by high energy barriers, uncontrolled oxidation pathways, and inefficient reactive oxygen species (ROS) utilization. Here, we report an energy-driven confined catalytic nanoreactor that leverages the in-situ confinement energy generated within nanopores to fundamentally regulate degradation thermodynamics. Taking sulfamethoxazole (SMX) as a model contaminant, the confined nanoreactor exhibited a 22.11-fold higher kinetic constant (0.157 min −1 ) and 40 % enhanced mineralization efficiency compared with its non-confined system. The imprinting channel of confined nanoreactor enabled selective adsorption of SMX within the nanochannel, inducing pronounced confinement effects. The resulting confinement energy triggered a low-entropy degradation pathway (ΔS reduced by 3.2 × 10 3 -fold), which broke thermal equilibrium constraints and redirected SMX oxidation along a low-energy-barrier route. The in-situ confinement-induced low-entropy reaction not only accelerated pollutant degradation but also improved ROS conversion efficiency. This study demonstrated a green and sustainable approach to overcome the intrinsic efficiency bottleneck of Fenton-like processes and provide a new perspective on exploiting nanoconfinement effects for environmental remediation.
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PubMed
高影响因子
MINERALS ENGINEERING
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2025
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IF 5
Xiaoyu Jiang,Sikai Zhao,Jie Wang,Haiyi Lv,Weizhen Bai,Wenbao Liu,Qiang Zhao,Yanbai Shen
Tetracycline (TC) persistence in aquatic systems poses significant ecological and human health risks, due to its toxicity and resistance to conventional biodegradation. In this study, sulfur and nitrogen modification strategies were employed to enhance the catalytic performance of spinel ferrite MnFe 2 O 4 for TC degradation via H 2 O 2 and peroxymonosulfate (PMS) activation. The catalysts were characterized using SEM, XRD, VSM, CV, and ICP-OES to elucidate the effects of heteroatom modification on morphology, crystal structure, magnetic separability, and metal leaching behavior. S modification markedly enhanced both H 2 O 2 and PMS activation capabilities. The optimized S/MnFe 2 O 4 -5/H 2 O 2 system removed 82 % TC (50 mg/L) within 20 min, an eightfold increase in the reaction rate compared to the unmodified MnFe 2 O 4 /H 2 O 2 . This system maintained high efficiency across a broad pH range (3–11). In contrast, nitrogen modification selectively improved PMS activation, with the optimal N/MnFe 2 O 4 -3/PMS system degrading 74 % TC in 30 min, twice the degradation rate of MnFe 2 O 4 /PMS, and exhibiting minimal metal leaching with excellent recyclability. Scavenger studies confirmed that ·OH constitutes the dominant reactive oxygen species (ROS) in S/MnFe 2 O 4 -5/H 2 O 2 systems, while both ·OH and ·SO 4 - contribute significantly in N/MnFe 2 O 4 -3/PMS systems. Sulfur species act as electron mediators, facilitating the Fe/Mn redox cycle and enhancing ROS generation, whereas zero valence iron (Fe 0 ) formed during nitrogen modification serves as an efficient electron donor to activate PMS. Degradation pathway analysis and toxicity predictions confirmed a substantial reduction of TC environmental hazards. This work provides fundamental insights into the structure–activity relationships of heteroatom-modified MnFe 2 O 4 catalysts, and establishes practical design principles for robust advanced oxidation process catalysts in antibiotic remediation.
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Journal of Advanced Research
·
2025
·
IF 13
Mengjiao Wu,Chengpu Lv,Yuling Xiong,Wenglong Li,Yuangui Lin,Jing Li,Fei Yu,Huan Yuan,Biao You,Qiuping Zhang,Ming Xu
Introduction Heterostructured photocatalysts have shown an enormous potential in photocatalytic degradation of organic pollutants in wastewater. However, the efficacy of such heterojunction on the photocatalytic degradation behaviors has not yet been fully revealed. Objectives This work aims to demonstrate a specific photocatalytic degradation behavior of ZnO-based heterostructured nanocomposites toward methyl orange (MO) and methylene blue (MB) dyes based on a systematically comparative investigation for their physical and chemical properties. Methods A series of low-cost and efficient ZnO-based heterostructured nanocomposite photocatalysts including ZnO/CuO, ZnO/TiO 2 and ZnO/SnO 2 with 3 and 10 mol% of CuO/TiO 2 /SnO 2 were synthesized by a simple strategy to combine the modified polymer-network gel and traditional sol–gel methods. The physical and chemical properties were analyzed using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), X-ray photoelectron spectra (XPS), ultraviolet–visible (UV–Vis) absorption spectra, photoluminescence (PL), surface photovoltage (SPV), electrochemical impedance spectroscopy (EIS) and zeta potential. Results Owing to the fast interfacial charge transfer at the heterojunction, all the three ZnO-based nanocomposite catalysts exhibited higher efficient separation of photogenerated electrons and holes, delivering an enhanced photocatalytic activity for the degradation of organic dyes compared with pure ZnO. Three photocatalysts of ZnO/3 %-CuO, ZnO/3 %-TiO 2 and ZnO/10 %-SnO 2 (marking as ZC3, ZT3 and ZS10, respectively) were capable of achieving the complete degradation of 4 mg/L concentration of MB dye within 50 min, and the first two could degrade MO within 80 min. However, the degradation rate of MO by ZS10 became significantly slower. For MO and MB degradation, the active species of photogenerated holes ( h h ν + ) and superoxide radicals ( · O 2 - ) play the predominant roles, respectively, followed by hydroxyl radicals ( · OH ). The differences in heterojunction configuration and dominant active species result in a specific photocatalytic degradation behavior of ZnO-based composite nanostructures. Conclusion The generation of the active species are influenced by the heterojunction configurations, of which the essence is that the different band alignments can results in the differences of interfacial charge transfer behaviors, and thus selective generation of the active species such as h h ν + , · O 2 - and · OH . Importantly, this work offers a fundamental understanding for specific photocatalytic degradation of the different heterojunction nanostructures towards the different organic dyes.
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高影响因子
Journal of Physical Chemistry C
·
2024
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IF 3.3
Yanting Dou,Yu Gao,Bobo Bai,Jiqi Zheng,Shuxia Bao,Cheng Dong,Hongjiang Li,Qiuhui Bu,Dongling Ma,Fu Ding,Yaguang Sun,Zhenhe Xu
Design and conception of a competent photocatalyst for water splitting and photodegradation are critical for energy transformation and environmental remediation. Herein, for the first time, we demonstrated that mixed redox-couple-involved bornite phase Cu5FeS4 could act as an efficient and robust cocatalyst for graphitic C3N4 (g-C3N4), which enables the achievement of considerably boosted visible-light photocatalytic activities in both H2 evolution and pollutant degradation reactions. Under visible-light irradiation, the optimized g-C3N4/Cu5FeS4 heterojunction presented a remarkably increased H2 production rate of 27.92 μmol g–1 h–1 (without involving any noble metals) and methyl orange (MO) photodegradation rate of 2.18 min–1 g–1 compared with those of g-C3N4 and Cu5FeS4. To be more specific, these rates are ∼15 and 3 times higher than those of pure g-C3N4 in these two reactions, where the pure Cu5FeS4 did not show any activities. The enhanced photocatalytic performance was identified to be due to the presence of a “mixed redox-couple” of Cu(I)–S–Fe(III), which enhanced charge separation efficiency between g-C3N4 and Cu5FeS4, consequently facilitating the overall reaction kinetics. Overall, our work not only demonstrates the immense potential of using mixed redox-couple-involved bornite phase Cu5FeS4 as the cocatalyst in photocatalysis but also expedites the designing and discovering of novel photocatalytic systems based on the proposed concept of the mixed redox-couple.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Tianyong Zhang,Junjun Lin,Hongli An,Shuang Jiang,Bin Li
Composite material (PGPI) of polyimide (PI) modified by C.I. Pigment Green 8 (PG8) were prepared by solid-phase thermal polycondensation, impregnation and thermal treatment. The introduction of PG8 enhanced the π-π stacked crystalline structure and the visible light absorption of PI. The photo-Fenton synergistic system can effectively increase the decomposition efficiency of H 2 O 2 , accelerate Fe 2+ /Fe 3+ cycling and reduce the recombination of photogenerated carriers. The synergistic oxidative removal of TH (Tetracycline hydrochloride, 50 ppm) by PGPI after 40 min under visible-light irradiation was 95.1 %, which was significantly better than that of the photocatalysis alone (40.7 %) and the Fenton reaction alone (55.0 %).
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Lingzhen Miao,Siqi Luo,Ziru Liang,Ming Lu,Pengcheng Wang
The treatment of wastewater laden with energetic compounds, particularly 2,2′,4,4′,6,6′-hexanitrostilbene (HNS), remains highly challenging owing to the environmental persistence and inherent toxicity of nitroaromatic derivatives. Herein, we reported a CoFe 2 O 4 /PMS system for the first-time efficient degradation of HNS. The CoFe 2 O 4 /PMS process afforded 96.3% removal of HNS within 150 min, together with 89.3% chemical oxygen demand (COD) removal and 49.5% total organic carbon (TOC) removal, indicating substantial deep oxidation and partial mineralization. Mechanistic studies combining quenching experiments, EPR spectroscopy, electrochemical analysis, and DFT calculations disclosed a synergistic radical/non-radical pathway dominated by 1 O 2 , with Fe incorporation enhancing PMS adsorption, charge transfer, and catalytic activation. HPLC-MS revealed degradation intermediates and supported three plausible degradation pathways, whereas QSAR analysis indicated progressive detoxification during oxidation. The catalyst further exhibited excellent stability, negligible metal leaching, and broad applicability toward actual HNS production wastewater and other energetic organic pollutants. These findings identify CoFe 2 O 4 /PMS as a promising platform for the efficient remediation of hazardous energetic compound wastewater.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Hao-Yu Zhou,Ya-Yun Ma,Chao-Chen,Guo-Zhi Han
A novel hollow SiO₂@g-C₃N₄@AgBr photocatalyst was fabricated for efficient H₂O₂ production. • The Z -scheme heterojunction endow the catalyst with a narrow band gap of 1.25 eV and superior charge separation efficiency. • The catalyst exhibits a dual-channel pathway to achieve a high H₂O₂ yield up to 1392.84 μmol h −1 g −1 . Using PVP-modified polystyrene (PS) microspheres as a template, and tetraethyl orthosilicate (TEOS), melamine, AgNO₃, and KBr as precursors, a novel mesoporous hollow SiO₂@g-C₃N₄@AgBr ternary composite photocatalyst with a porous surface was readily prepared via a one-pot method. The composite structure was obtained by simple calcination without further chemical reduction. The structure and morphology of the catalyst were characterized by XRD, UV–Vis DRS, SEM, TEM, and XPS. The results revealed that the hollow SiO₂ microspheres provided a high specific surface area, and the band gap of the composite was narrowed to 1.25 eV, endowing the hollow composite with excellent broad-spectrum photocatalytic performance. The catalyst achieved efficient photocatalytic H₂O₂ production from water under ambient air, and the maximum productivity reached 1392.84 μmol·g −1 ·h −1 within 1 h with the aid of different sacrificial agents. Finally, the catalytic mechanism was investigated. The as-prepared catalyst exhibited a unique dual-channel pathway based on a Z -scheme heterojunction, which significantly boosted H₂O₂ production and environmental adaptability. Download: Download high-res image (65KB) Download: Download full-size image
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ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 29
·13042-13055
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IF 7.6
Lau Chun-Yin,Li Xinwei,Zhang Yanlin,Rangarajan Goutham,Tse Ho-Yin,Zhuang Huichuan,Leu Shao-Yuan,Farnood Ramin R.
In this study, an amorphous carbon-rich carbon nitride photocatalyst was prepared by nitric acid treatment of pyrolyzed melamine followed by nitrogen annealing. The resulting semiconductor material exhibited an up-shifted valence band that enhances the oxidizing power of photogenerated holes, enabling selective C α −C β bond cleavage of 2-phenoxy-1-phenylethanol (2-POE). Using 1.5 g L −1 of the optimized photocatalyst in acetonitrile, 2-POE underwent first-order conversion with a reaction rate of 2.55 h −1 under a 9 W blue LED light source. Product analysis showed the formation of benzaldehyde as the major product, confirming C−C bond scission with 93.1% selectivity. In addition, ring-opening reactions were observed, producing fumaric and maleic acids as the by-products. Photocatalytic depolymerization of organosolv lignin further demonstrated ring opening of the β-O-4 linking motifs, forming dicarboxylic acids analogous to those generated from 2-POE. These demonstrate a metal-free photocatalytic platform capable of promoting β-O-4 bond cleavage in lignin model compounds and inducing photocatalytic structural modification of organosolv lignin, accompanied by the formation of low-molecular-weight aliphatic dicarboxylic acids.
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