JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Zhanzhen Ma,Qianjin Ye,Sirui Liu,Qunhua Zhong,Guisheng Zhu,Jianjun Zhu,Di Li,Deli Jiang
Designing S-scheme heterojunctions with high charge separation efficiency and strong photo-redox capability is regarded as effective way to enhance the photocatalytic activity, yet achieving S-scheme charge transfer remains challenging. In this work, we report the construction of a well-designed S-scheme heterojunction by integrating carbon vacancies-containing carbon nitride (V C -CN) and CsPbBr 3 quantum dots. Experimental studies and density functional theory (DFT) calculations demonstrate that the enlarged interfacial interaction induced by the V C within CN could achieve a directional S-scheme charge transfer, therefore improving photogenerated carrier separation capability and consequently promoting photocatalytic CO 2 reduction performance. The CO evolution rate over 5 % CsPbBr 3 /V C -CN S-scheme heterojunction is 84.39 μmol·g −1 ·h −1 , which is 16.26 times than that of CN. Our work offers an alternative strategy to construct S-scheme heterojunction photocatalytic for CO 2 reduction via modulating the internal electric filed achieved by defect engineering route.
研究领域:
材料科学
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光催化
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环境科学
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纳米技术
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理论化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Sirui Liu,Qianjin Ye,Qin Li,Zhanzhen Ma,Ran Yang,Di Li,Deli Jiang
Carbon nitride (CN) has received extensive interest due to their good stability and unique conjugated structures. However, the weak charge separation ability and poor active sites lead to undesirable photocatalytic CO 2 reduction activity. Here, we successfully prepare all-organic PTA/V C -CN S-scheme heterojunction photocatalysts by integrating CN with carbon vacancies (V C -CN) and perylene tetracarboxylic acid (PTA) for photocatalytic CO 2 reduction. The introduced carbon vacancies can act as electron trapping sites, break the symmetry structure of CN and facilitate in-plane photogenerated carrier separation and transfer of CN, while the coupling of PTA with V C -CN via π-π interaction to form a built-in electric field further speeds up the interfacial charge transfer, thereby collectively enhancing the separation and transfer efficiencies of photogenerated carriers. Moreover, the high reduction capability of V C -CN with carbon vacancies as possible active sites and wide-spectrum light absorption of PTA render the S-scheme heterojunction with high photocatalytic activity. The optimum PTA/V C -CN photocatalyst exhibits a high CO production rate of 47.91 μmol g −1 h −1 , which is about 10.7 and 4.2 times higher compared to those of CN and V C -CN, respectively. This work provides a new strategy for developing all-organic CN-based S-scheme heterojunction photocatalysts used in CO 2 conversion.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Xin Qi,Feifei Nie,Yingshan Wu,Bei Ruan,Kezhong Wu,Mingxing Wu
Vanadium-based carbides have been applied as Pt-free counter electrodes (CEs) electro-catalysts for dye-sensitized solar cells (DSSCs) due to the advantages of earth-abundant reserves, diverse composition , ease modification, and low cost. Herein, the polyoxovanadate (NH 4 ) 2 V 6 O 16 as V source assisted by dicyandiamide (C 2 H 4 N 4 ) as C source via simply physical mixing by ball-milling to assemble VC@C precursors. And then, five different VC@C composites derived from precursors with mass ratios of dicyandiamide to polyoxovanadate of 5:1, 10:1, 15:1, 20:1 and 25:1 at 900 °C, and further achieved power conversion efficiencies (PCEs) of 5.4%, 5.6%, 6.6%, 6.2% and 5.1% as CEs for regenerate traditional I 3 − /I − couple in the encapsulated DSSCs, respectively. The effects of different mass ratio of dicyandiamide on the catalytic performances of VC@C composite CEs were also assessed using cyclic voltammetry , electrochemical impedance spectroscopy and Tafel polarization experiments. The photocurrent-photovoltage ( J - V ) results indicated that VC@C composites CEs had high conductivity and rich number of active sites, which indicated that VC@C composites could be a cost-effective and high-performance alternative Pt-based CEs catalyst for DSSCs.
研究领域:
材料科学
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可再生能源
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Artificial Cells Nanomedicine and Biotechnology
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2014
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IF 0
Xiulan Su,Song Guo,Xiaoxia Huang,Xiang Wang,Donglai Qi,Chengmin Yang
Oxidative reactions of hemoglobin (Hb) are still a serious problem for Hb-based blood substitute development. Although varieties of antioxidant strategies have been suggested, this in vitro study examined the ability of the ascorbate, N-Acetyl-L-Cysteine (NAC), 4-hydroxy-2, 2, 6, 6-tetramethylpiperidine-1-oxygen free radicals (TEMPO) and their reductant system in preventing Hb oxidation. The content of ferric Hb is monitored in the process of vitamin C (Vc), NAC, TEMPO and their reductant system. The results suggest that ascorbate is effective in reducing ferryl Hb, and TEMPO with Vc/NAC could obviously shorten the reaction time, but it does not play the role of Met-Hb reductases. It demonstrates that TEMPO did little to recover Hb under oxidative stress.
研究领域:
生物化学
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医学工程
✓ 已验证
产品关联
DOI
PubMed
Journal of Cleaner Production
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2024
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IF 9.7
Min Wang,Guanghua Lu,Runren Jiang,Tianjian Dang,Yufang Chen,Jianchao Liu,Zhenhua Yan,Jun Hou
The widespread use of bisphenol F (BPF) as the commonly used alternative to bisphenol A (BPA) in the industry and its hazardous effects on ecological system and human health have attracted widespread attention. In this study, V C -FCN 0.3 hollow nanotube structure with confinement space effects and combined carbon vacancies was constructed by the spatial self-corrosion strategy, which effectively addressed the inherent limitations of conventional carbon nitride and achieved 100% removal rate of BPF within 2 h under visible light. Carbon vacancies not only accelerated the transfer of photogenerated carriers, but also enhanced the adsorption and activation of oxygen that accelerating the production of ·O 2 − , the main active species in this system. In addition, the special spatial structure shortened the mass transfer distance between the target pollutants and the active species. What's more, V C -FCN 0.3 showed excellent, stable, and eco-friendly photocatalytic degradation of bisphenol F over a wide pH range and in five water matrices, contributing effectively to the solution of purification of wastewater containing bisphenol analogues.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Nan Wang,Xiangjie Bo,Ming Zhou
The development of cost-effective Pt-based electrocatalysts is of great scientific and industrial significance for improving the electrocatalytic activity of hydrogen evolution (HER) and oxygen evolution (OER) reactions for overall water splitting. In this work, unlike traditional furnace pyrolysis, we report the rapid and single-step room-temperature synthesis of Pt/VC nanocomposites with a three-dimensional (3D) network porous structure by laser irradiation technology. The resultant Pt-based composite (Pt/VC-2.84) could be applied to HER under different pH conditions. In particular, the content of Pt in Pt/VC-2.84 is only 2.84 wt %, which is far lower than that in the advanced HER electrocatalyst with the Pt content of 20 wt % (commercial 20 wt % Pt/C). In addition, Pt/VC-2.84 exhibits a boosted higher OER activity and stability than RuO2 in an alkaline medium. Most importantly, electrocatalytic results reflect that Pt/VC-2.84 reveals superior activity and stability toward overall water splitting.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Chemistry-X
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2022
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IF 6.443
Xiaoshan Long,Xiao Hu,Huan Xiang,Shengjun Chen,Laihao Li,Bo Qi,Chunsheng Li,Shucheng Liu,Xianqing Yang
This research aimed to analyze structural characterization and hypolipidemic activity in vitro of G. lemaneiformis polysaccharide (GLP) and its degradation products. The results presented that the content of galacturonic acid declined and glucuronic acid level enhanced, average particle size decreased from 99.9 μm to 25.7 μm, and color brightness of polysaccharide strengthened after degraded by H 2 O 2 -Vc. There was no significant change in thermal stability of polysaccharide before and after degradation. It was observed in AFM analysis, polysaccharide changed to smaller, delicacy and dispersion after degradation. As seen in FT-IR, H 2 O 2 -Vc degradation never change the structure of polysaccharide. Polysaccharide and its degradation products showed a significant inhibition effect on pancreatic lipase and cholesterol esterase in a dose-dependent manner, which presented the mixed type of competitive and non-competitive for pancreatic lipase, and non-competitive for cholesterol esterase, respectively. The fluorescence quenching type was static on pancreatic lipase and dynamic on cholesterol esterase.
研究领域:
海洋生物学
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生物化学
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药理学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Weizhen Xie,Chenting Yang,Quanwei Deng,Shigang Su,Lu Lin,Xing Tang
The selective hydrogenation of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-bis(hydroxymethyl)tetrahydrofuran (BHMTHF) under mild conditions holds great significance for sustainable chemical production. However, this process remains hindered by challenges such as the instability of HMF in aqueous media and the insufficient efficiency of H 2 activation. Herein, a Pd catalyst supported on oxygen-vacancy–enriched MnO x -VC (Pd/MnO x -VC) is developed, featuring highly dispersed Pd/PdO heterostructures with abundant Pd–O–Mn interfacial active sites. Notably, Pd/MnO x -VC offered a high BHMTHF formation rates of 366.5 mol BHMTHF ·mol Pd −1 ·h −1 in water under mild conditions. Moreover, the catalyst was able to efficiently convert both purified and crude HMF at high concentrations (≥ 10 wt%), achieving BHMTHF yields exceeding 90 % in either batch or continuous-flow reactor under low temperatures (30–60 °C), underscoring its potential for industrial application. Mechanistic studies revealed that the relay activation of H 2 over Pd nanoparticles and adjacent Pd–O–Mn sites generates polarized H δ⁺ –H δ⁻ pairs, which primarily contributed to the outstanding activity of Pd/MnO x -VC. This work highlights the importance of interfacial site engineering in designing high-performance catalysts for HMF hydrogenation.
研究领域:
催化化学
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生物质转化
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绿色化学
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材料化学
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应用化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Fengying Dai,Xinpo Li,Kepeng Lv,Jing Wang,Yiping Zhao
Nanomedicine faces the challenges of infinite dilution, shear force, biological protein, or electrolyte competition. However, core cross-linking leads to biodegradability deficiency and brings inevitable side effects of nanomedicine on normal tissues. In order to overcome this bottleneck problem, we turn to amorphous poly(d,l)lactic acid (PDLLA)-dextran bottlebrush to emphasize the core stability of nanoparticles, and the amorphous structure offers an additional advantage of fast degradation property over the crystalline PLLA polymer. The graft density and side chain length of amorphous PDLLA together played important influence roles in controlling the architecture of nanoparticles. This effort produces structure-abundant particles, including micelles, vesicles, and large compound vesicles after self-assembly. Here, the amorphous bottlebrush PDLLA was verified to play a beneficial role in the structure stability and degradability of nanomedicines. The codelivery of the hydrophilic antioxidant of citric acid (CA), vitamin C (VC), and gallic acid (GA) via the optimum nanomedicines could effectively repair the SH-SY5Y cell damage caused by H2O2. The CA/VC/GA combination treatment repaired the neuronal function efficiently, and the cognitive abilities of senescence-accelerated mouse prone 8 (SAMP8) recovered.
研究领域:
纳米医学
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聚合物化学
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神经科学
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药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
KEY ENGINEERING MATERIALS
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2017
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IF 0
Ke Le Yan,Hong Xing Zhang,Ying Li,Bing Zou,An Shan Xiao,Ming Ma
A new kind of kinetic hydrate inhibitor (KHI) named KL-1 as the ramification of poly (N-vinyl caprolactam) (PVCap), was synthesized successfully by use of precipitation polymerization. The hydrate inhibition performance of KL-1 was assessed in a high pressure sapphire cell, and the onset time of hydrate formation and maximum subcooling were determined by the visual observation method and compared with the commercial KHIs, including Inhibex 501 and VC-713. Meanwhile, the synergic effect between ethanol and KL-1 developed was also studied in this work. The experimental results show that the onset time of KL-1 measured increases with the increase of the dosage and decrease of subcooling. Compared with the system without kinetic hydrate inhibitor, the morphological behavior of hydrate crystals in the systems containing KL-1 is different, and the hydrate crystals only grow to the gas phase with the hydrate formation. Additionally, based on the measurement of inhibition time, the inhibition performance of KL-1 is superior to Inhibex 501 and VC-713, and shows higher maximum subcooling at the similar conditions. Finally, we also demonstrated that ethanol can be used as synergist to improve the performance of KL-1 remarkably at suitable dosage.
研究领域:
化学工程
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材料科学
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高分子化学
✓ 已验证
DOI
LWT-FOOD SCIENCE AND TECHNOLOGY
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2021
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IF 4.952
Yizhan Guo,Chunfei Zhao,Peixuan Yu,Jihui Gao,Zhongxin Liang,Ruiyang Ji,Haolan Du,Jiahui Fu,Jianfen Liang,Dong Yang
Dough elasticity and bread quality depend on the gluten network formation which by nature is the oxidative crosslinking of glutenin. It is known for long, either in the kitchen or in the laboratory, sodium chloride (NaCl) enhances dough rheological properties while itself is not an oxidant. However, besides NaCl induced gluten aggregation, the molecular mechanism behind this phenomenon is largely unknown. Azodicarbonamide (ADA) and Vitamin C (Vc) improve dough qualities with different mechanisms. Here, response surface methodology (RSM) was used to study the synergistic effect of ADA, Vc and NaCl on the dough and subsequent bread qualities. Results show that NaCl dominates the dough alveographic characters in the presence of oxidative flour improvers, and fine tune of NaCl concentration profoundly impacts subsequent bread properties. Consistent with free sulfhydryl assay and glutenin gel electrophoresis analysis, simulation study reveals that NaCl concentration affects glutenin conformation and intermolecular interaction which in turn impacts their orientation adjustment that lead to sulfhydryl contact and crosslinking.
研究领域:
食品科学
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烘焙技术
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化学
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分子生物学
✓ 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）