JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 2
·2026-2040
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IF 2.478
Zhang He,Qian Jianhua,Zhang Jie,Xu Jiasheng
TiO 2 @Sn(Sb)O 2 core–shell composites (TiO 2 @SnO 2 , TiO 2 @Sb 2 O 4 and TiO 2 @Sb-SnO 2 ) have been prepared through a chemical co-precipitation method with a calcination process. The mixture hydrolysates of SnCl 4 and SbCl 3 have been deposited on the surface of TiO 2 as the precursor. These hydrolysates have been converted to Sn(Sb)O 2 particles, leading to the formation of the TiO 2 @Sn(Sb)O 2 core–shell structure. Their electrochemical performances and electrocatalytic degradation efficiencies of methylene blue (MB) have been investigated. It is found that TiO 2 @Sb-SnO 2 electrode presents a larger effective electrocatalytic area and more electroactive sites, which provide more contact points between the pollutant and electrode and enhance electrocatalytic oxidation activity. The TiO 2 @Sb-SnO 2 electrode exhibits a higher degradation efficiency (97.6%) than that of TiO 2 @SnO 2 (80.1%) and TiO 2 @Sb 2 O 4 (34.9%). The TiO 2 @Sb-SnO 2 electrode provides a 91.1% degradation efficiency after five cycles test, indicating a high stability during degradation process. These results show that the as-prepared TiO 2 @Sb-SnO 2 electrode can provide a promising application to treat dye wastewater, which relies on its core–shell structure.
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高影响因子
Acta Biomaterialia
·
2021
·
IF 8.947
Chuanchuan He,Xiaojuan Zhang,Chen Chen,Xiaoguang Liu,Yan Chen,Ruicong Yan,Ting Fan,Yongkang Gai,Robert J. Lee,Xiang Ma,Jun Luo,Yao Lu,Tan Yang,Guangya Xiang
The unfavorable factors in tumor microenvironment such as hypoxia and limited H 2 O 2 levels greatly impede the anticancer efficacy of chemotherapy and chemodynamic therapy (CDT). To address these issues and achieve O 2 /H 2 O 2 -sufficient chemo/chemodynamic combination therapy, we synthesized a solid lipid monostearin coated calcium peroxide (CaO 2 ) nanocarrier for the co-delivery of a chemotherapeutic drug doxorubicin (DOX) and a biocompatible Fenton catalyst iron-oleate complex. Specifically, the solid lipid shells of nanoparticles could disintegrate in lipase-overexpressed cancer cells to release iron-oleate and expose CaO 2 cores. Afterwards, the uncovered CaO 2 responded to the acidic aqueous environment within cancer cells, leading to the release of DOX molecules and generation of H 2 O 2 . Based on Fenton reactions, Fe 3+ liberated from iron-oleate reacted with H 2 O 2 to produce O 2 for hypoxia-relieved chemotherapy, and Fe 2+ for the catalytic generation of hydroxyl radical to initiate CDT. Both treatments synergistically contribute to the enhanced antitumor outcomes.
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DOI
PubMed
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Weina Yang,Yachao Wang,Yaxiong Wei,Guofeng Zhao,Weixin Huang,Cong Fu
Photocatalytic oxidative coupling of methane (OCM) offers a sustainable pathway for direct conversion of methane into value-added hydrocarbons, yet faces persistent challenges in balancing efficient methane activation with suppression of overoxidation. Here, we present a TiO2-based photocatalyst decorated with highly dispersed Ag–Co dual sites that achieves superior performance in continuous-flow OCM. The optimized AgCo–TiO2 system demonstrates a remarkable C2 hydrocarbon production rate of 1.7 mmol g–1 h–1 with 91% selectivity while maintaining stable operation for over 30 h. In situ spectroscopic analyses indicate that the introduced Co species induce mobile-charge imbalances, driving the directional transfer of photogenerated electrons and effectively suppressing electron–hole recombination. Coupled with Ag serving as a catalytic center, these effects synergistically enhance O2 activation, C–H bond cleavage, and selective C–C coupling, thereby contributing to the superior catalytic performance. This work provides valuable mechanistic insights into the photocatalytic OCM process, highlighting the pivotal role of precisely engineered charge transfer pathways in enabling efficient methane-to-C2 conversion.
研究领域:
光催化
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材料科学
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化学工程
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环境化学
·
能量转换
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Zhiyu Shao,Jing Sun,Niankun Guo,Feng He,Keke Huang,Fuli Tian,Qin Wang
Designing highly active and low-cost electrocatalysts towards oxygen evolution reaction has ignited much interest in recent years. Thereby, rational design of those catalysts is an urgent topic that must be addressed. Herein, an effective strategy is demonstrated to be beneficial to the formation of hierarchical nitride phosphide hybrid with abundant oxygen vacancies . This hybrid catalyst exhibits an excellent OER catalytic performance, as demonstrated by an ultralow Tafel slope of 41 mV·dec −1 and an overpotential of 290 mV at 10 mA cm −2 in 1.0 M KOH solution, which is superior to those of the pure nitride, phosphide, and the commercial IrO 2 catalysts. The outstanding catalytic performance can be attributed to the specific heterojunction structure, accessible active sites, and abundant oxygen vacancies, which can facilitate the charge transport and the release of the O 2 bubbles. This study not only provides a facile strategy for constructing surface oxygen vacancies onto phosphide/nitride hybrid, but also exhibits an insight into the nature of hierarchical electrocatalyst with multiple active sites.
研究领域:
电化学
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材料科学
·
催化
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hao Jiang,Mei Yan,Hao Chen,Yutuo Fu,Chongshen Guo
Strong Coulomb force between photogenerated electrons and holes often results in high level exciton pairs during the photocatalytic process, which hinders the formation of reactive oxygen species (ROS) in the photocatalytic reaction, particularly for the photocatalysis under near infrared (NIR) irradiation. Hence, it is crucial to dissociate excitons into free carriers. In this study, we propose a novel amorphous–crystalline heterojunction of a-CeO 2 /SnFe 2 O 4 for the NIR-driven photocatalytic degradation and sterilization. The introduction of disorder–order interface in heterojunction could greatly enhance the built-in electric field, thereby serving for exciton dissociation. Additionally, the presence of oxygen vacant sites in the a-CeO 2 /SnFe 2 O 4 system can effectively modulate the electronic structure of the material, facilitating exciton dissociation in conjunction with the built-in electric field. The DFT simulation proved the positive impact of the disorder–order interface on charge separation, as well as its enhancement on the activation of O 2 and H 2 O molecules. This work provides a theoretical support for the creation of disorder–order interface to promote exciton dissociation and enhance photocatalytic performance.
研究领域:
材料科学
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光催化
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表面化学
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理论化学
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DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2024
·Vol. 57
·期 43
·435204
·
IF 3.1
Pengyu Zhao,Yikang Jia,Sihong Ma,Rui Zhang,Kaiyu Li,Tianyi Song,Jianbao Zheng,Jingyao Zhang,Li Guo,Dingxin Liu,Xiaohua Wang,Mingzhe Rong
Methicillin-resistant Staphylococcus aureus (MRSA) presents a significant threat due to the multiple resistance to antibiotics, leading to severe and challenging-to-treat infections. Plasma-activated saline (PAS) prepared by plasma gases, could efficiently inactivate various pathogenic bacteria including both sensitive and antibiotic-resistant bacteria. In this study, the PAS was prepared by plasma gases with different ratios of N2 and O2 activated by gliding arc discharge. First, the gaseous reactive species in the plasma gases were compared, revealing that the highest levels of NOx including NO2 and N2O5 were generated in the gases with the N2/O2 ratios of 4:6, 5:5, and 6:4. Subsequently, the PAS prepared by the two plasma-activated gases at the N2/O2 ratios of 5:5 and 6:4 exhibited the strongest inactivation effects on both planktic MRSA and biofilms. Furthermore, the aqueous reactive species in the PAS exhibited varied change trends with the increasing N2/O2 ratios. Additionally, ultraviolet spectroscopy combined with the probe of N, N-diethyl-p-phenylenediamine was applied for the detection of O2NOO− in the PAS, and the levels of O2NOO− in the PAS were positively correlated with the inactivation effects. Moreover, the PAS induced varying levels of nitration modification on the soluble proteins in MRSA cells, which were related to the intensities of O2NOO− in the PAS. This study regulated the reactive species in the PAS through gas composition and explored the inactivation mechanism of the PAS, providing a new strategy to promote the preparation efficiency of plasma-activated solutions for biomedical applications.
研究领域:
微生物学
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生物医学工程
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感染病学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zixian Qin,Yuxiu Sun,Zhengqing Zhang,Chenxu Zhang,Chi Tang,Chenxu Geng,Zhihua Qiao
Oxygen/nitrogen (O 2 /N 2 ) separation is of great importance but faces huge challenges owing to their similar molecular size and close polarity. In this work, we construct a polymer of intrinsic microporosity (PIM-1) based mixed matrix membrane (MMM) for efficient O 2 /N 2 separation by using ZIF-8 as the sieving filler along with surface modification of o-carborane (o-CB) to strengthen selective N 2 adsorption fixation as well as polymer-filler interfaces. Markedly, the o-CB on the outer surface of ZIF-8 not only affords the requisite interfacial compatibility in molecular sieving MMMs, but also increases the diffusion difference between O 2 and N 2 by the preferential adsorption with N 2 molecules. This synergistic effect of molecular sieving and adsorption inhibition achieves efficient O 2 /N 2 diffusion differential separation. As expected, the optimal membrane with o-CB-ZIF-8 loading of 35 wt% exhibits an O 2 permeability of 796.5 Barrer and a mixed O 2 /N 2 selectivity of 8.9 with O 2 /N 2 (20:80, vol.) mixtures, exceeding the latest 2015 upper bound limits. Moreover, the according membrane module with o-CB-ZIF-8 loading of 20 wt% also displays moderate O 2 permeability of 391.7 Barrer and O 2 /N 2 selectivity of 5.5 under pressure of 1 bar. This work may provide a feasible platform for designing high-performance MOF-based membranes in air separations.
研究领域:
材料科学
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分离技术
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DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2020
·
IF 0.936
Liang WANG,Zhang-Quan PENG
Development of lithium-oxygen (Li-O 2 ) batteries is hindered by large overpotentials, low energy efficiency and unsatisfactory cycling life, which are predominately caused by the oxygen evolution reaction (OER) involving sluggish oxidation of lithium peroxide (Li 2 O 2 ). Herein, a highly-efficient soluble redox mediator (RM) of N , N’ -Diphenyl- p -phenylenediamine (DPPD) is introduced to catalyze the oxygen evolution reaction for Li-O 2 batteries. During charging process, DPPD is electrochemically oxidized into DPPD + , which can chemically decompose Li 2 O 2 on the cathode with a much-reduced overpotential. The in-situ differential electrochemical mass spectrometry confirms that the charging process is dominated by Li 2 O 2 decomposition. With the assistance of DPPD, Li-O 2 cells can achieve lower charging potential, improved cycling stability, and prolonged lifespan (294 cycles) which is three times longer than that of tetrathiafulvalene counterpart. This work presents a credible and viable opportunity for long lifespan Li-O 2 batteries.
研究领域:
电化学
·
能源材料科学
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DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 36
·364003
·
IF 3.399
Chao Li,Yijie Liu,Bojie Li,Fan Zhang,Zhu Cheng,Ping He,Haoshen Zhou
All-solid-state Li–O2 batteries are receiving intense interest because of the substitution of solid electrolytes for toxic and flammable liquid electrolytes. However, new issues are arising in the aspect of the electrolyte cathode interface. On the one hand, in a traditional sandwiched battery structure, the reaction sites of the cathode are restricted to the finite planar electrode–electrolyte interface, resulting in limited performance of all-solid-state Li–O2 batteries. On the other hand, integrating the electrolyte with the cathode to achieve good interfacial contact often requires complex sintering processes. Herein, this work reports a solid electrolyte cathode assembly (SECA) which consists of a dense Li1.5Al0.5Ge1.5P3O12 (LAGP) layer and a carbon coated porous LAGP layer fabricated by facilely one-step sintering. As a result, Li–O2 batteries adopting the SECA showed a relatively high discharge capacity of 0.48 mAh cm−2 at 5 μA cm−2. Besides, the batteries could sustain six full cycles with a restricted capacity of 0.08 mAh cm−2 at 10 μA cm−2. It was found that the high capacity can be attributed to the high surface area of porous cathode structure.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Journal of Physical Chemistry C
·
2014
·
IF 4.835
Wugang Fan,Xiangxin Guo,Dongdong Xiao,Lin Gu
Gold nanoparticles (AuNPs) anchored to vertically aligned carbon nanotubes (VACNTs) act as additional nucleation sites for the Li2O2 growth, leading to the decreased size while increased density of Li2O2 particles in process of discharge. Correspondingly, at the deep discharge to 2.0 V the batteries show increased specific capacity. Upon charge, the AuNPs exhibit promotion effect on the Li2O2 decomposition by improving the conduction property of the discharge-formed particles, rather than by imposing the conventional electrocatalytic effect on the oxygen evolution reaction. Moreover, the AuNPs show promotion effect on decomposition of carbonate species arising from the side reactions. These effects consequently lead to the reduced charge overpotentials and extended cycle operation of the batteries. The results here provide a new as well as clear picture on the role of incorporated AuNPs in the Li2O2 formation and decomposition, which would be helpful for better understanding and constructing of high-performance air cathodes.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Binbin Shao,Yufan Chen,Deli Wu,Chaomeng Dai,Yalei Zhang
Structural Fe(II/III) hydroxides on the shell of nano-zerovalent iron (nZVI) are reactive sites for As(III) adsorption. Well-controlled structural Fe(II) hydroxides (SFH) is prepared to serve for As(III) removal in present study. With oxygen As(III) removal by SFH occurred efficiently but the removal efficiency was greatly reduced under anoxic conditions. The mineral transformation from SFH to lepidocrocite probably contributed to the robust removal efficiency of As(III). It is found that Cu(II), Cr(VI) and NO 2 − in aqueous solution could act as oxidants and promote the mineral transformation of SFH. A more efficient As(III) removal was therefore observed without oxygen. The removal efficiency decreased in the order O 2 /SFH ≈ Cu(II)/SFH > Cr(VI)/SFH ≈ NO 2 − /SFH at near neutral pH. The removal efficiency was less dependent on the initial pH for O 2 /SFH and Cu(II)/SFH systems than Cr(VI)/SFH and NO 2 − /SFH systems. Distribution of As on solid phases was able to describe the removal mechanism of As(III), and the results showed that the mineral transformation promoted the precipitation process and inhibited outer-sphere complexation, thus leading to enhanced As removal. With Cu(II), Cr(VI) and NO 2 − , the generation of oxidants from SFH transformation drove As(III) oxidation, and contributed to total As removal.
研究领域:
环境科学
·
化学
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高影响因子
SusMat
·
2021
·Vol. 1
·期 3
·448-457
·
IF 0
Zhaomin Chen,Xiaoqing Gu,Yutong Guo,Xin Wang,Mingwang Shao,Bin Dong,Zhenhui Kang
Electrochemical cell can overcome the inherent intermittence of the renewable energy sources, thus showing great potentials in applications ranging from electrical energy storage to future smart grid. However, the current electrochemical cells could not achieve the “total green” feature by fully utilizing the clean and abundant O 2 /H 2 O redox couples due to the enormous overpotentials for both oxygen reduction reaction (ORR) and oxygen release reaction (OER). Herein, we report a “total green” electrochemical composite film cell based on carbon dots (CDots), which can realize both ORR and OER in the acid environment. The in-air voltage generation (0.95 V, with a maximum power of 5.3 μW) relies on the multiple-electron-transfer redox chemical reaction between the two active components inside the composite film, that is, ORR/OER of CDots and the redox reaction of polyaniline (PANI) on the electrode and the resulting proton concentration gradient. Interestingly, the cell can be self-recovered at low load, recharged by adding H 2 O 2 , or electrocharged at high load. We anticipate that current study may open up new opportunities for designing and developing total-green energy storage and conversion systems for diverse applications.
研究领域:
材料科学
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能源技术
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环境科学
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DOI
危险品化学品经营许可证（带存储）