JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Xiaohua Zheng,Mengnan Xu,Chenbin Cai,Yanhaohan Yuan,Feng Lin,Wei Chen,Fanger Yang
Photocatalysis is a green approach to solving energy and environmental problems, and researchers are still pursuing high-performance photocatalysts . Although BiOX (X = Cl or Br) has a suitable bandgap and good stability, its photoresponse is mostly concentrated in the UV region. Conversely, SnS 2 has a wide photoresponse range but exhibits perceptible photocorrosion and poor stability. To exploit the advantages of both BiOX and SnS 2 , this study hydrothermally synthesized and introduced superfine SnS 2 (∼30 nm in size) into a BiOCl/BiOBr binary system to fabricate BiOCl/BiOBr/SnS 2 composites. Subsequently, the degradation performance of these composites in a Rhodamine B solution under visible light was investigated. Results show that the BiOCl/BiOBr/SnS 2 heterojunctions were successfully prepared and the composites exhibited the best photocatalytic performance with 6% mass fraction of SnS 2 (BiOCl-to-BiOBr mol ratio = 1:1). The formation of a double S-schedule heterojunction between BiOCl/BiOBr and SnS 2 not only accelerated charge separation and transfer but also broadened the photoresponse range and reduced photoelectron–hole recombination under full-spectrum irradiation. Loading a small narrow-bandgap photocatalyst onto a large photocatalyst provides an effective way to construct heterojunctions with excellent photocatalytic performance. The ternary photocatalyst presents a favorable photocatalytic stability, and its photodegradation rate is 4.6, 4.5 and 220.5 times that of BiOCl, BiOBr and SnS 2 , respectively.
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DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 36
·15330-15337
·
IF 3.5
Fangzheng Qi,Zengsheng Guo,Yuhan Zhang,Xue-Na Tang,Yiqiang Sun,Bo Xu,Guang-Ning Liu,Cuncheng Li
The stable contact of heterogeneous interfaces and the substantial exposure of active sites are crucial for enhancing the photocatalytic performance of semiconductor catalysts. However, most reported two-dimensional (2D)/2D CsPbBr3 and BiOCl heterostructures are fabricated using electrostatic self-assembly methods, which exhibit significant deficiencies in precise interface quality control and effective active site exposure. In this study, we fabricate a zero-dimensional (0D)/2D CsPbBr3/BiOCl heterojunction via a two-step calcination method, achieving an efficient direct S-scheme configuration. Optimizing interfacial contact and band alignment between CsPbBr3 quantum dots and BiOCl nanosheets enhances cross-plane charge transfer, promoting superior charge separation. This 0D/2D CsPbBr3/BiOCl heterojunction exhibits enhanced carrier mobility and high conversion rates without cocatalysts or sacrificial agents. The mechanism underlying the accelerated S-scheme charge transfer is comprehensively elucidated through a combination of analytical techniques and density functional theory (DFT) calculations. This study offers a novel approach for managing charge carrier segregation and mobility in CO2 reduction photocatalysts.
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Batteries & Supercaps
·
2024
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IF 5.1
Qian Zhang,Jiajun Wan,Qingping Gao,Jie Liu
Graphical Owing to the stronger molecular polarity of inorganic polymer compared to organic polymer, robust chemisorption towards polysulfides can be achieved for the as-designed spider-web polymer blocking layer. The cycling stability of the high-loading Li−S battery with a sulfur loading of 7.15 mg cm −2 has been obviously improved, delivering a high areal capacity of 5.26 mAh cm −2 after 50 cycles. The cycling performance of high-loading Li−S batteries is still puzzled by the serious shuttle effect of polysulfides. Modifying the commercial separator with polysulfide anchoring materials has been demonstrated as an economical and effective approach to block the polysulfide shuttle. Herein, a cobweb-like polymer polysulfide-blocking layer has been constructed via crosslinking between lithium polysilicate (LP) inorganic oligomer and tannic acid (TA) dendritic polymer. Owing to the strongly polar Si−O and Si=O bonds in LP, the spider-web polymer possesses robust affinity towards polysulfides, indicated by the theoretical calculations. Dendritic polymer TA as the skeleton contributes to effectively exposing the abundant polar functional groups to powerfully capture the polysulfides. As a result, the cycling stability of high-loading Li−S batteries has been obviously improved. The Li−S battery with sulfur loading of 3.44 mg cm −2 can stably cycle 100 cycles with a high capacity of 685.1 mAh g −1 and columbic efficiency of 99.82 %. Even the sulfur loading increases to 7.15 mg cm −2 , the Li−S battery can still deliver a high areal capacity of 5.26 mAh cm −2 after 50 cycles.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yiru Chen,Dongying Zhu,Shikai Xue,Haiyan Wang,Qiujun Lu,Guihua Ruan,Chenxi Zhao,Fuyou Du
Constructing heterogeneous photocatalysts to enhance the visible light absorption and photo-generated charge carrier separation for efficient degradation of organic pollutants in water samples remained a significant challenge. An S-scheme BiOCl/ZnCrZr-layered bimetallic oxide (LBMO) heterojunction was constructed by depositing BiOCl nanoparticles on ZnCrZr-LBMO. The characterization of material samples were by XRD, SEM, TEM, XPS, FTIR, UV–Vis-DRS, transient photocurrent response, and electrochemical impedance spectroscopy. The photocatalytic efficiency of BiOCl/ZnCrZr-LBMO heterojunction was obviously improved, about 3.95 and 1.68 folds higher than that of pristine BiOCl and ZnCrZr-LBMO, respectively. The fast separation and migration and the prolonged lifetime of photo-generated carriers in the BiOCl/ZnCrZr-LBMO heterojunction were validated by photoelectrochemical tests. The influence factors, versatility, and reusability of the heterojunction were also evaluated. Free radical scavenging test and ESR experiment revealed that ·O 2 – and h + active radicals were the dominant active radicals in the BPA degradation. Additionally, BPA degradation intermediates were detected by LC-MS, and the possible degradation pathway of BPA was deduced using density functional theory. This novel S-scheme model heterojunction was expected to provide new ideas for the study of the photocatalytic mechanism and the BPA removal.
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JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Yuchi Liu,Bingxiu Xue,Ruijing Ma,Xiaopeng Zhao,Jianbo Yin
Poly(ionic liquid)s (PILs) are providing potential platforms to develop next generation water-free polyelectrolyte-based electrorheological (ER) fluids because they well overcome water sensitivity problem of classic polyelectrolyte-based ER fluids by incorporating with large size fluoric counterions. Especially, crosslinked PILs (CPILs) can further broaden the working temperature range of ER effect compared to linear PILs. However, the crosslinking network easily restricts the ion dissociation due to decreased dielectric constant and thus weakens ion movement-induced interfacial polarization and ER effect. In this paper, we propose a way to improve ion dissociation and ion movement-induced interfacial polarization of CPILs by doping polar aniline oligomer to improve the dielectric constant of CPILs. Several kinds of CPILs are synthesized and then aniline oligomer is doped into CPILs by swelling method. The structure of doped CPILs is characterized by different techniques, the dielectric property of ER fluids of doped CPIL particles in silicone oil is analyzed by dielectric spectroscopy, and the ER effect of ER fluids of doped CPIL particles is measured by rheometer under electric fields. It shows that doping aniline oligomer can increase the dielectric intensity and decrease the relaxation time and corresponding activation energy of interfacial polarization and improve the ER effect of CPILs with a relatively loose crosslinking network, while doping aniline oligomer has no contribution to the interfacial polarization and ER effect of CPILs with a relatively tight crosslinking network.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xingyu Zhan,Yunxiong Zeng,Bo Hong,Xinqing Wang,Yingchun Xia
Artificial photosynthesis for H 2 O 2 production through O 2 reduction is a sustainable and cost-effective technology for the scientific and industrial communities. Metal-free polymeric carbon nitride (CN) is a promising visible-light responsive semiconductive material for photocatalytic H 2 O 2 production. However, its inherently disordered and amorphous structure limits its performance improvement due to high photogenerated carrier complexation and sluggish interlayer charge transfer. Here, we report a high-performance S-type heterojunction, composed of CeO 2 coupled with N -vacancy-rich CN (CeO 2 /Nv-CN), that enhances the photocatalysis of H 2 O 2 production under visible light. The prepared CeO 2 /Nv-CN showed an H 2 O 2 generation rate of up to 69.79 mmol·g −1 ·h −1 , 48.80-fold higher than CN and had an apparent quantum yield of 13.8 % at 400 nm. A synergistic effect among CeO 2 , N -vacancies (Nv) and S-type heterojunction is responsible for such an excellent activity, which increased the O 2 and light absorption sites, built rapid charge diffusion channels, and enhanced two-electron O 2 reduction. This work demonstrates the potential of incorporating nanosized CeO 2 with CN to achieve high-performance photocatalytic H 2 O 2 production, opening new avenues for designing highly efficient polymeric composite photocatalysts for energy conservation.
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Small Methods
·
2025
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IF 9.1
Xinlong Liu,Yimeng Li,Xinhua Liu,Yangyang Huang,Fujun Wang,Jiafeng Li,Yuqi Guo,Xinyuan Zhu,Lijuan Zhu,Chuan Zhang
Plasmids are widely used gene vectors in gene therapy, yet their efficient delivery remains a major challenge for achieving optimal therapeutic outcomes. Recently, poly(β-amino esters) (PBAEs) have emerged as promising carriers for non-viral gene delivery due to their tunable structures and high delivery efficiency. Nonetheless, the cationic nature of PBAEs raises toxicity concerns, and their lack of tissue-specific targeting capability limits their clinical application. Herein, a novel PBAE for efficient plasmid delivery is constructed, which contains disulfide bonds in the backbone and N-acetylgalactosamine (GalNAc) moieties at the terminals (GalNAc-PBAEs). To address the potential reduction in nucleic acid condensing capacity caused by end-capping PBAE with GalNAc, the commonly used end-capping amines in conventional PBAE are employed as monomers to create GalNAc-PBAEs with tertiary amine side chains. Through side-chain screening, the optimized GalNAc-PBAE exhibits enhanced transfection efficiency, surpassing that of the conventional top-performing PBAE, C28-E7, and rivaling the commercial transfection reagent Lipo2000. Importantly, the GalNAc moieties enable the plasmid-PBAE polyplex to efficiently target the liver. In a mouse model with acute liver fibrosis, the efficient delivery and expression of a representative plasmid encoding HGF significantly mitigate liver fibrosis and improve liver function, demonstrating the potential of the designed PBAE in gene therapy.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Chuangye Wang,Jintang Xue,Ruixue Sun,Xinrong Song,Xinyi Zhang,Xufeng Lin,Longli Zhang
The purpose of this paper is to report an efficient templating synthesis of hierarchically porous SAPO-11 molecular sieves. Poly(vinyl alcohol) was phosphorylated to get different phosphorus contents, and those designedly modified polymers were employed as mesoporous template in the hydrothermal synthesis of SAPO-11. Consequently, the prepared hierarchical molecular sieves exhibited higher BET areas, regular mesopore structures, and better acidity than their conventional counterpart. The catalysts with SAPO-11s as support had improved catalytic conversion and selectivity in hydroisomerization of n-hexane. The templating mechanism of the designed mesoporogens as well as the effects of their phosphorus content on the properties of hierarchical SAPO-11 molecular sieves were well discussed. This work provides an effective approach to template intracrystal mesopores in hierarchical silicoaluminophosphate molecular sieves.
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PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
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2025
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IF 4
Wei-Huan Xu,Meng-Yao Zhu,Zhi-Heng Xu,Xiao-Jie Li,Chao-Yang Peng,Xiao-Pei Fan,Yong-Qiang Li
The fall armyworm, Spodoptera frugiperda (J. E. Smith) is a notorious insect pest of poaceae and causes severe economic damage to major cereal crop. It has evolved with different levels of insecticide resistance. Insect cytosolic GSTs are a major class of detoxifying enzymes and have been implicated in metabolic resistance and protection against oxidative stress. In this study, an epsilon class GST ( SfGSTe9 ) was identified from S. frugiperda and its transcript levels were highest in the fat bodies, second instar and pupae. Furthermore, SfGSTe9 is upregulated after exposure to beta- cypermethrin, lambda -cyhalothrin, chlorpyrifos, and malathion. The kinetic analysis suggests the purified recombinant proteins exhibit CDNB conjugating activity, with the V max of 11.87 ± 0.25 μM·min −1 ·mg −1 protein and K m of 0.22 ± 0.01 mM. The peroxidase activity assays indicate that SfGSTe9 has antioxidant activity against both CHP and H 2 O 2. The inhibition assays infer that four types of insecticides have strong inhibition on the GST activity. In vitro metabolism assays with HPLC further suggest that SfGSTe9 could be able to deplete 11.2 %, 21.3 % and 19.3 % of beta- cypermethrin, lambda -cyhalothrin and chlorpyrifos within 2 h, respectively, with specific activity varying between 30 and 40 μM·min −1 ·mg −1 protein. However, no metabolites were identified in this case, indicating that SfGSTe9 probably involves in detoxification via binding and sequestration. 3D modeling and molecular docking analysis indicate that above three types of insecticide compounds fit nicely into the hydrophobic pocket in the active site of SfGSTe9 . Our results definitely demonstrate that SfGSTe9 of S. frugiperda plays pivotal role in insecticide detoxification and serves in defence against oxidative stress .
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EUROPEAN POLYMER JOURNAL
·
2024
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IF 5.8
Xiaowei Li,Chilong Liu,Xiaoru Quan,Yanxin Zhang,Su Wang,Shuangfei Zhao,Jiming Yang,Yirong Feng,Wei He,Kai Guo
Acylhydrazone linkages are attractive in designing reconfigurable and chemically recyclable polymer due to their reversible characteristics and ease of preparation. We fabricate mechanically strong, thermally stable and chemically recyclable poly(acylhydrazone)s (pDFF-IPDH) using biobased 2,5-diformylfuran (DFF) and dihydrazide compounds as monomers. The linear chains are physically cross-linked via hydrogen bonding between the acylhydrazone moieties. The pDFF-IPDH sample exhibits good mechanical properties, offering both high strength and toughness. The linear and reversible acylhydrazone backbones endow polymers with attractive temperature-dependent dynamic natures, which enables the topological network to rearrange, giving the poly(acylhydrazone)s excellent reprocessability. Moreover, the feasibility of formaldehyde-promoted depolymerization presents an effective recycling pathway, offering promising opportunities in addressing the challenge between recyclability and service performance.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qiliang Zhu,Wenxuan Huang,Jianhua Shen,Haibo Jiang,Yihua Zhu,Chunzhong Li
Metal halide perovskite nanocrystals have garnered significant attention in the realm of photocatalytic CO 2 reduction in recent years owing to their remarkable reducing properties and high selectivity. However, the issue of low photocatalytic activity due to severe carrier recombination phenomena in perovskite has posed a significant challenge. To address this, a one-pot in-situ preparation strategy was employed to create a BiOBr/Bi-doped perovskite nanocrystal S-scheme heterojunction, resulting in a significant improvement in the CO 2 photoreduction performance. The heterojunction material exhibited a CO yield of 151.56 μmolg -1 h −1 , with a selectivity for CO of 93.6 %. The molar ratio of the components was modulated using an in-situ water aging strategy, yielding a photocatalyst performance that exceeded that of pure BiOBr. The synthesis strategy of one-step in-situ preparation of heterojunctions overcomes the problem of insufficient bonding caused by two-step methods. And various characterizations and DFT calculations strongly support the S-scheme mechanism of the photocatalyst. The active site effectively reduces the energy barrier for the transition from *COOH to *CO intermediate, thereby significantly improving photocatalytic activity.
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Science China-Materials
·
2024
·Vol. 67
·期 7
·2142-2152
·
IF 6.8
Li Yaying,Yang Huijuan,Li Jili,Li Yefei,Ren Wei,Wen Jin,Xiao Qi,Xu Jingsan
Heterojunction photocatalysis has been widely studied as a means of efficiently converting solar energy to chemicals. However, the major challenge in developing high-performing heterojunction photocatalytic systems lies in achieving efficient transfer of electrons between the components. Herein, a novel S-scheme heterojunction photocatalyst was developed by combining BaTi 2 O5 nanorods with g-C 3 N 4 lamellae. The preferential deposition of Pt nanoparticles as cocatalyst via the one-step impregnation-reduction method on g-C 3 N 4 nanosheets with enhanced interfacial contact and strong electronic interaction has been proved essential for the photocatalytic performance. The developed Pti mp /20BaTi 2 O 5 /g-C 3 N 4 photocatalyst delivers the optimal hydrogen production rate of 2587 µmol g −1 h −1 with high stability after cycles. Photoelectrochemical analysis and theoretical calculation suggest that the formation of BaTi 2 O 5 /g-C 3 N 4 heterojunction results in the staggered band alignment and improved charge carrier dynamics. This work highlights the importance and feasibility of promoting photocatalysis by a new S-scheme heterojunction with viable cocatalysts.
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