ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2024
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IF 10.8
Xiu Huang,Yong Li,Zhao Shu,Li Huang,Qian Liu,Guibin Jiang
Plastic pollution is a significant environmental concern globally. Plastics are normally considered chemically inert and resistant to biodegradation. Although many papers have reported enzyme-induced biodegradation of plastics, these studies are primarily limited to enzymes of microbial origin or engineered enzymes. This study reveals that poly(ethylene terephthalate) (PET, ∼6000 Da and 100 kDa) particles and plastic bottle debris (PBD, 24.9 kDa) can be efficiently degraded by a mammal-origin natural phase II metabolic isozyme, glutathione S-transferase (GST), under mild conditions. The degradation efficiency of PET plastics reached 98.9%, with a degradation rate of 2.6 g·L–1·h–1 under ambient or physiological conditions at 1 atm. PET plastics can be degraded by GST with varying environmental or biological factors (i.e., temperature, light irradiation, pH, and presence of humic acid or protein). We suggest a novel mechanism for PET degradation other than hydrolysis, i.e., the mechanism of cleavage and release of PET plastic monomers via nitridation and oxidation. This finding also reveals a novel function of GST, previously thought to only degrade small molecules (<1000 Da). This method has been successfully applied in real human serum samples. Additionally, we have tested and confirmed the ability to degrade PET of a mammal-origin natural digestive enzyme (trypsin) and a human-derived natural metabolic enzyme (CYP450). Overall, our findings provide a potential new route to plastic pollution control and contribute to our understanding of the metabolism and fate of plastics in organisms.
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CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Baolong Zhang,Fangxuan Liu,Bin Sun,Tingting Gao,Guowei Zhou
ABSTRACT Photocatalytic water splitting to produce H 2 using semiconductor photocatalysts is a reliable approach to alleviating energy shortages and environmental pollution. However, the inadequate light-harvesting ability, rapid photogenerated carrier recombination, and inferior redox capacity of the individual photocatalysts restrict their photocatalytic activity . To address these limitations, a hierarchical S-scheme heterojunction of ZnIn 2 S 4 -nanosheet-decorated flower-like TiO 2 microspheres for enhancing photocatalytic H 2 evolution, purposely constructed through in situ chemical bath deposition, has been reported. The as-synthesized TiO 2 /ZnIn 2 S 4 heterojunctions exhibited ZnIn 2 S 4 -content-dependent photocatalytic activity for solar-driven H 2 evolution. As a result, the optimized TiO 2 /ZnIn 2 S 4 heterojunction exhibited a superior photocatalytic H 2 evolution rate of 6.85 mmol g –1 h –1 , approximately 171.2- and 3.9-fold with respect to that obtained on pure TiO 2 and ZnIn 2 S 4 , respectively, mainly attributed to the unique hierarchical structure, extended light-harvesting ability, enhanced redox capacity, and improved separation and transfer efficiencies of the photogenerated carriers induced by the S-scheme heterojunctions. Simultaneously, a detailed analysis of the S-scheme electron transfer pathway in the TiO 2 /ZnIn 2 S 4 heterojunction was performed using in situ irradiated X-ray photoelectron spectroscopy and electron paramagnetic resonance spectroscopy . This study provides insights into the design of highly active heterojunction photocatalysts for sustainable solar-to-fuel energy conversion.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
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IF 8.3
Yanze Wang,Zhenyu Liu,Wenxuan Wang,Junxiao Tang,Rongjie Wang,Jingjing Xie,Zhengyi Fu
Accelerating charge transport and avoiding recombination are promising strategies for establishing highly efficient artificial photosystems. Herein, an S-scheme heterostructure consisting of Zn x Cd 1− x S and TiO 2 is fabricated via the in situ crystal growth method. The refined structure significantly enhances the transport of photogenerated charges, thereby improving photocatalytic hydrogen production efficiency. The optimized TiO 2 −Zn x Cd 1− x S composite, incorporating 60% TiO 2 with Zn 0.4 Cd 0.6 S, exhibits a robust H 2 evolution rate of 50.96 mmol g −1 h −1 with continuous release of H 2 bubbles. It is worth noting that the hydrogen production rate in seawater is as high as 26.22 mmol g −1 h −1 . The strong interfacial interaction and staggered band alignment between TiO 2 and Zn x Cd 1− x S result in the formation of a built-in electric field and high-content oxygen vacancies, which can drive the directional migration of photoelectrons with high redox ability and high speed. The designed photocatalyst with S-scheme and rich Oxygen vacancies at the interface provides a new approach for fabricating high-efficiency photocatalysts.
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FUEL
·
2025
·
IF 7.5
Honglin Li,Xin Zhang,Yuanyuan Wen,Jingyuan Li,Yu Liu,Hongjun Mao,Hongman Sun,Jingbin Zeng,Zifeng Yan
Sulfur-doped copper (S-doped Cu) was regarded as an efficient catalyst for formate in CO 2 electrochemical reduction reaction (CO 2 RR), but the selectivity and current density are still unsatisfied due to the hydrogen evolution reaction (HER) and CO generation pathway. Herein, S-doped Cu nanoparticles were synthesized by in-situ reduction of the constructed Cu-thioamide coordination polymers, exhibiting impressive performance for formate production in the CO 2 RR process. Particularly, the CuBr-thiobenzamide (TBA) coordination polymers derived S-doped Cu nanoparticles (CuBr-TBA-R) achieve a formate Faradaic efficiency of 84.4 % with current density of formate to 6.7 mA cm −2 . The characterization results indicate these generated S-doped Cu nanoparticles are uniform with the particle size of 20–30 nm exposed a large amount of Cu (100) facets due to the coordination of thioamide molecules and presence of Br - and I - in electrolyte. The morphological characteristics and strong affinity for oxygen is the reason of higher formate selectivity and current density. This finding reveals the characterizations of efficient S-doped Cu catalysts for formate and provide a controllable approach to prepare these catalysts.
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INTERNATIONAL IMMUNOPHARMACOLOGY
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2024
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IF 4.8
Yuxin Zhang,Lixuan Yang,Yonghui Gan,Chenchen Zhao,Chao Zhou,Jian Chen,Yanping Yin,Shengnan Xia,Haiyan Yang,Xinyu Bao,Meijuan Zhang,Yun Xu,Jingwei Li
Microglia, the primary immune cells of the central nervous system, play a crucial role in the neuroinflammatory processes following ischemic stroke. Targeting neuroinflammation is a promising strategy to enhance the outcomes of ischemic stroke. Benzydamine (BA), a well-known non-steroidal anti-inflammatory drug, has demonstrated potential in inhibiting pro-inflammatory cytokines across various disease models. However, the potential role of BA in microglial activation and post-stroke neuroinflammation remains unclear. Our study reveals that BA effectively suppresses the lipopolysaccharide (LPS)-stimulated pro-inflammatory responses of primary microglia, with high-dose BA (10 μM) suppressing LPS-induced inflammatory markers by up to 59.1 % in the mRNA levels of IL-1β. Furthermore, BA mitigated ischemic brain injury in experimental stroke mice. BA treatment also significantly attenuated neuroinflammatory responses and attenuates ischemic brain injury in experimental stroke mice. Further investigation revealed that BA reduces the release of the LPS-stimulated pro-inflammatory factors and activation of primary microglia by directly binding to and inhibiting the activity of cathepsin S (CTSS). In conclusion, our study identifies BA as a promising CTSS inhibitor with potential to suppress neuroinflammation following ischemic stroke. Our findings provide a theoretical basis for developing new neuroprotective strategies.
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Nature Communications
·
2020
·Vol. 11
·期 1
·1-15
·
IF 12.121
Cao Ji,Chen Xiaobing,Jiang Li,Lu Bin,Yuan Meng,Zhu Difeng,Zhu Hong,He Qiaojun,Yang Bo,Ying Meidan
Ferroptosis is a newly characterized form of regulated cell death mediated by iron-dependent accumulation of lipid reactive oxygen species and holds great potential for cancer therapy. However, the molecular mechanisms underlying ferroptosis remain largely elusive. In this study, we define an integrative role of DJ-1 in ferroptosis. Inhibition of DJ-1 potently enhances the sensitivity of tumor cells to ferroptosis inducers both in vitro and in vivo. Metabolic analysis and metabolite rescue assay reveal that DJ-1 depletion inhibits the transsulfuration pathway by disrupting the formation of the S-adenosyl homocysteine hydrolase tetramer and impairing its activity. Consequently, more ferroptosis is induced when homocysteine generation is decreased, which might be the only source of glutathione biosynthesis when cystine uptake is blocked. Thus, our findings show that DJ-1 determines the response of cancer cells to ferroptosis, and highlight a candidate therapeutic target to potentially improve the effect of ferroptosis-based antitumor therapy.
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Journal of Materials Chemistry A
·
2024
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IF 10.7
Hongxu Zhou,Weichen Han,Hongquan Chai,Hao Huang,Jingang Zheng,Han Zhang,Lixiang Li,Weimin Zhou,Baigang An,Chengguo Sun
Sluggish reaction kinetics in lithium–sulfur (Li–S) batteries has seriously hindered their practical application. Herein, a three-dimensional (3D) granular carbon skeleton decorated with nickel-rich NCM materials (NCM@3D-SP) is prepared as a cathode host for Li–S batteries, where the carbon matrix is rich in pore channels, can provide good conductivity and electrolyte diffusion, and NCM811 particles contribute abundant metal sulfides active sites through metal-ion exsolution. The different metal sulfides (NiS, Ni3S2, Ni7S6, and CoS) in heterogeneous structures exhibit outstanding catalytic and adsorption effects on polysulfides during cycling, where the ion diffusion coefficient is increased by approximately 2.5 times compared to the cathode without catalytic active sites (3D-SP). A Li metal battery using NCM@3D-SP/S as the cathode exhibits a capacity decay of only 0.051% per cycle at 2C after 500 cycles. Even at an ultra-high current density of 10C and a sulfur-loading of 6 mg cm−2, the cells maintain a stable reversible discharge capacity of 453.1 mA h g−1 after 500 cycles and 4 mA h cm−2. The incorporation of nickel-rich cathode materials and 3D sulfur host structure presents a novel strategy for high-catalytic activity cathodes of Li–S batteries.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Alamgir,Raza Ullah,Khalid Talha,Hongye Yang,Nouraiz Mushtaq,Abrar Ahmad,Linkun Fan,Lan Li,Guixia Zhao,Xusheng Wang,Junkuo Gao
It is challenging to engineer a photocatalyst that can degrade antibiotics efficiently. We have successfully developed a series of photocatalysts by annealing In-MOF (BUT-205) with TiO 2 , namely (a) In 2 O 3 /TiO 2 -I, (b) In 2 O 3 /TiO 2 -II, and (c) In 2 O 3 /TiO 2 -III. These catalysts, particularly In 2 O 3 /TiO 2 -III, exhibited superior efficiency in degrading tetracycline (TC) under visible light. The enhanced photocatalytic performance of In 2 O 3 /TiO 2 -III can be attributed to the formed S-scheme heterojunction, which promoting the separation of electron-hole pairs. The S-scheme heterojunction was confirmed by XPS , in-situ XPS, UV–vis diffuse reflectance spectroscopy, and Mott-Schottky plot, etc. Compared to pure TiO 2 and In 2 O 3 , the In 2 O 3 /TiO 2 -III demonstrated an 18-fold and 3-fold higher degradation rate constant (k). Various factors affecting the degradation of TC were investigated, including pollutant concentration, catalyst type, solution pH, catalyst dosage, inorganic anions , inorganic cations , and radical species. Photoluminescence (PL) and transient photocurrent density evaluate the separation rate of electron-hole pairs, and EPR experiments (active species trapping) studies confirmed •O 2 − and h + as the primary entities in TC photodegradation by In 2 O 3 /TiO 2 -III. HPLC/MS analysis revealed the photocatalytic degradation pathway. The MOF-derived photocatalysts efficiency in TC photoreduction results from the formed S-scheme heterojunction, making it a promising candidate for environmental remediation.
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International Journal of Minerals Metallurgy and Materials
·
2024
·Vol. 32
·期 1
·169-181
·
IF 5.6
Li Haixu,He Haobo,Jiang Tiannan,Du Yunfei,Wu Zhichen,Xu Liang,Wang Xinjie,Liu Xiaoguang,Yu Wanhua,Xue Wendong
S and Co co-doped carbon catalysts were prepared via pyrolysis of MOF-71 and thiourea mixtures at 800°C at a mass ratio of MOF-71 to thiourea of 1:0.1 to effectively activate peroxymonosulfate (PMS) for methylene blue (MB) degradation. The effects of two different mixing routes were identified on the MB degradation performance. Particularly, the catalyst obtained by the alcohol solvent evaporation (MOF-AEP) mixing route could degrade 95.60% MB (50 mg/L) within 4 min (degradation rate: K = 0.78 min −1 ), which was faster than that derived from the direct grinding method (MOF-DGP, 80.97%, K = 0.39 min −1 ). X-ray photoelectron spectroscopy revealed that the Co–S content of MOF-AEP (43.39at%) was less than that of MOF-DGP (54.73at%), and the proportion of C–S–C in MOF-AEP (13.56at%) was higher than that of MOF-DGP (10.67at%). Density functional theory calculations revealed that the adsorption energy of Co for PMS was −2.94 eV when sulfur was doped as C–S–C on the carbon skeleton, which was higher than that when sulfur was doped next to cobalt in the form of Co–S bond (−2.86 eV). Thus, the C–S–C sites might provide more contributions to activate PMS compared with Co–S. Furthermore, the degradation parameters, including pH and MOF-AEP dosage, were investigated. Finally, radical quenching experiments and electron paramagnetic resonance (EPR) measurements revealed that 1 O 2 might be the primary catalytic species, whereas ·O 2− might be the secondary one in degrading MB.
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OPTICAL MATERIALS
·
2024
·
IF 3.8
Qingxue Zhao,Xiaoxia Duan,Tian Tian,Lixin Yi
BaS:Eu,Dy phosphors were prepared by high temperature solid-state method with BaSO 4 as matrix raw material, Eu 2 O 3 and Dy 2 O 3 or Eu 2 (SO 4 ) 3 ·8H 2 O and Dy 2 (SO 4 ) 3 ·8H 2 O as doped ion raw materials. BaSO 4 can be completely reduced after 3 h sintering at 1200 °C in CO atmosphere and pure BaS was obtained in one step. Meanwhile, the rare earth ions were embedded in the host lattices and had no impact on the main structure of the products. However, X-ray diffraction peaks shift shows rare earth doping can cause lattice distortion with the increase of sintering temperature . The luminescence characteristics of BaS:Eu,Dy, BaS:Eu, BaS:Dy and BaS are compared in order to study the luminescence mechanism. It is confirmed that the broad emission locating in the near-infrared (NIR) region should be assigned to 4f 6 5 d 1 →4f 7 transition of Eu 2+ , and the emission locating in the visible region comes from S-related defects in the matrix. Sulfur-rich is particularly detrimental to NIR luminescence. In relatively S-rich systems, there is serious energy transfer between Eu 2+ and S-related defects, which leads to fluorescence quenching. The products are in S-rich state when Eu 2 (SO 4 ) 3 ·8H 2 O and Dy 2 (SO 4 ) 3 ·8H 2 O are selected as raw materials of doped ions. BaS:Eu,Dy inclines to emit visible light with the sintering temperature increasing. By contrast, the products are in Sulfur-deficiency state when Eu 2 O 3 and Dy 2 O 3 are used as raw materials of doped ions and BaS:Eu,Dy only gives NIR emission.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ruiqi Zhang,Runcheng Liu,Zhihan Ding,Jinzhu Ma,Tao Wang,Dafeng Zhang,Junchang Liu,Peiqing Cai,Xipeng Pu
Photocatalytic hydrogen evolution is regarded as an economically viable and environmentally benign strategy. However, the practical application of photocatalytic hydrogen production is constrained by the sluggish reaction kinetics and rapid recombination of photogenerated charge carriers. Herein, a Cu 3 SnS 4 /Mn 0.3 Cd 0.7 S (CTS/MCS) S-scheme photocatalyst with photothermal effect was synthesized via an ultrasound-assisted self-assembly method and applied for the first time to photocatalytic hydrogen evolution. The hydrogen production rate of CTS/MCS-5 reached 72.5 ± 0.8 mmol/h g −1 , representing a 3.44-fold increase relative to Mn 0.3 Cd 0.7 S, and the apparent quantum yield of CTS/MCS-5 reached 17.5 % at 450 nm. The photothermal effect induced by Cu 3 SnS 4 can elevate the local surface temperature of the catalyst, providing a portion of the energy required for the reaction, thereby reducing the reaction barrier and further promoting photocatalytic reactions. This research highlights the significance of the S-scheme heterojunction and the photothermal effect as an effective strategy to enhance photocatalytic activity, offering new insights for the development of photocatalytic hydrogen evolution technology.
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Energies
·
2024
·Vol. 17
·期 6
·1449
·
IF 3
Qiong Li,Yu Wang,Ganghui Wei,Xiaorong Fang,Ni Lan,Yonggang Zhao,Qiming Liu,Shumei Lin,Deyan He
The preparation of composite carbon nanomaterials is one of the methods for improving the electrochemical performance of carbon-based electrode materials for supercapacitors. However, traditional preparation methods are complicated and time-consuming, and the binder also leads to an increase in impedance and a decrease in specific capacitance. Therefore, in this work, we reduced Ni-Cu nanoparticles on the surface of nitrogen-doped carbon nanofibers (CNFs) by employing an electrostatic spinning method combined with pre-oxidation and annealing treatments. At the same time, Ni-Cu nanoparticles were vulcanized to Ni–Cu–S nanoparticles without destroying the structure of the CNFs. The area-specific capacitance of the CNFs/Ni–Cu–S–300 electrode reaches 1208 mF cm−2at a current density of 1 mA cm−2, and the electrode has a good cycling stability with a capacitance retention rate of 76.5% after 5000 cycles. As a self-supporting electrode, this electrode can avoid the problem of the poor adhesion of electrode materials and the low utilization of active materials due to the inactivity of the binder and conductive agent in conventional collector electrodes, so it has excellent potential for application.
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