CHEMICAL PHYSICS LETTERS
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2025
·
IF 3.1
Ye Zhang,Xiaobing Yang
Recently, the overuse of tetracycline (TC) has caused persistent adverse effects on both ecological environment and human health. It needs to develop effective methods for removing TC from water. Herein, Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon was successfully synthesized and used as catalyst for degradation of TC. The influence of Ag 2 S and ZnIn 2 S 4 on the photocatalytic activity of TiO 2 @carbon were investigated. The results show that the Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon achieved a photocatalytic degradation efficiency of 98.73 %. Moreover, the photocatalytic activity of Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon remained nearly unchanged after four consecutive cycles, with only a 3.2 % decrease in degradation efficiency. Finally, the degradation mechanism of TC over Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon was elucidated.
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Nature Communications
·
2025
·Vol. 16
·期 1
·10895
·
IF 15.7
Wang Wei,Wang Xinying,Yang Huanhuan,Yu Zhipeng,Zhang Weicai,Huang Haoliang,Zhao Zaowen,Zheng Xuerong,Liu Lifeng,Deng Yida,Li Yunyong
A rational design principle for selecting optimal anion dopants in transition-metal compounds to enhance sulfur redox activity is lacking in Li-S batteries. Herein, we propose an accurate p-p-s orbital electronic coupling descriptor (involving the p -orbitals of anion dopants and anions in transition-metal compounds and the s -orbitals of Li in lithium polysulfides) as a criterion for choosing anion dopants to guide the development of efficient anion-doped Li-S catalysts through machine-learning, theoretical, and experimental validation. We reveal the relationship between the electronic properties of various anion-doped WSe 2 and the thermodynamics and kinetics of sulfur redox. Our findings show that moderate p-p-s orbital electronic coupling optimizes polysulfide adsorption, facilitating Li 2 S nucleation and decomposition, thereby minimizing Gibbs free energy and maximizing catalytic efficiency for sulfur redox. A volcano relationship between the p-p-s coupling strength and catalytic activity is established. The optimal B-WSe 2 /MXene catalyst achieves a ~ 3 Ah pouch cell with 430 Wh kg −1 specific energy and good cycle life (81.3% capacity retention over 71 cycles). These findings provide a guideline for designing efficient anion-doped Li-S catalysts with moderate p-p-s coupling to enable rapid sulfur catalytic conversion in Li-S batteries.
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TETRAHEDRON
·
2017
·
IF 2.651
Guiting Chen,Wei Yang,Bin Zhang
A novel n-type cationic conjugated polymer ( PFSOmiCl ), consisting of bispyrimidinium-dibenzothiophene- S , S -dioxide and fluorene scaffolds, was developed from its polymeric precursor ( PFSOmi ) through an intramolecular cyclization reaction . In comparison with PFSOmi , PFSOmiCl exhibits significant bathochromical absorption and photoluminescence spectra in both solution and film form, as well as a more hydrophilic film surface. Cyclic voltammetry tests demonstrate that PFSOmiCl possesses a deep lowest unoccupied molecular orbital (LUMO) energy level of −4.18 eV, which is comparable to the LUMO energy levels of common fullerene derivatives. These unique properties endow PFSOmiCl with great utilization potential in organic optoelectronic devices. Moreover, this research offers a novel guideline for designing new conjugated polyelectrolytes .
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Bo Shao,Tianyun Liu,Deng-Bing Li,Linxing Meng,Jianyuan Wang,Wei Zhai,Liang Li
Solar-driven hydrogen production is significant for achieving carbon neutrality but is limited by unsatisfactory surface catalytic reaction kinetics. Layer regulation can impact carrier transmission or catalytic behavior, but the specific effects on the oxygen or hydrogen evolution reaction (OER or HER) remain unclear, and atomic layer level modulation for maxing HER is challenging. Here the distinct roles of modulated Zn–S or In–S surface layers in ZnIn 2 S 4 (ZIS) for the OER and HER, respectively, are disentangled. Moreover, the extensive characterizations and computational results demonstrate that stressful environments enable individual modulation and introduce Ni into the surface In–S layer rather than the easily alterable Zn–S layer, creating deeper hybridized electronic states of Ni 3 d –S 3 p , optimizing H * adsorption/desorption, and maximizing surface catalytic benefits for the HER. Consequently, the optimized ZIS exhibited a photocatalytic hydrogen production rate of up to 18.19 mmol g −1 h −1 , ≈32 times higher than pristine ZIS. This investigation expands the application scenarios of ultrasonic technology and inspires other precise control types, such as defects and crystal plane engineering, etc.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Shuailing Wang,Qi Li,Yuxi Zheng,Feng Wang
Donor–acceptor (D–A) conjugated polymers have emerged as promising photocatalysts for hydrogen peroxide (H 2 O 2 ) production due to their unique optoelectronic properties. While extensive studies have explored the impact of D/A structures on photocatalytic H 2 O 2 production performance of conjugated polymers, the role of the linkage structure in modulating photocatalytic activity was rarely investigated. In this study, three D–A conjugated polymers, including ethylene-linked PSO-CC, imine-linked PSO-CN, and azo-linked PSO-NN, have been designed and synthesized by Suzuki coupling reaction. Remarkably, although the linkages differ by a single atom, the three polymers exhibit significantly different optoelectronic characteristics and charge transfer kinetics. It was revealed that photogenerated electrons preferentially migrated to the N sites in imine and azo linkages in PSO-CN and PSO-NN, respectively, thereby increasing photocatalytic H 2 O 2 production activity. The moderate polarized polymer PSO-CN shows excellent photocatalytic performance with an H 2 O 2 production rate of 1.43 mmol g −1 h −1 in pure water without any sacrificial agent. Theoretical investigation demonstrates that the imine linkages in PSO-CN serve as the active sites for photocatalysis. This work highlights the critical role of linkage electronic properties in modulating photocatalytic H 2 O 2 production performance for D–A conjugated polymers.
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CATALYSIS TODAY
·
2026
·
IF 5.1
Xiangdi Liu,Yihang Zhang,Wenwen Tian,Hongshang Peng
The solar-driven synthesis of hydrogen peroxide (H 2 O 2 ) using graphitic carbon nitride (g-C 3 N 4 ) is inherently limited by rapid charge recombination and insufficient light absorption. To address this issue, pre-synthesized nitrogen and sulfur co-doped carbon dots (N,S-CDs) were introduced onto g-C 3 N 4 nanosheets via a hydrothermal pre-anchoring strategy followed by calcination. The as-synthesized N,S-CDs/g-C 3 N 4 composites exhibited an enhanced H 2 O 2 production rate (1162.8 μmol·g −1 ·h −1 ), which was approximately 4.7 times higher than that of pristine g-C 3 N 4 . The improvement of photocatalytic activity was primarily attributable to the construction of step-scheme (S-scheme) heterojunction, which not only expedited the spatial separation of photogenerated charge carriers but also preserved the high redox potentials essential for efficient H 2 O 2 synthesis. Furthermore, the N,S-CDs broadened the light absorption range, enabling more effective utilization of visible light. This work provides a promising strategy for rational design of CD-based heterojunctions toward high-efficiency solar-driven H 2 O 2 production.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Jun Wu,Ye Wang,Song Zhang,Yuxiang Liu,Feng Wang
Photocatalytic conversion of benzyl alcohol (BA) into value-added fine chemicals and hydrogen (H 2 ) in water medium provides a novel strategy for green synthesis. The construction of Z-scheme heterostructures not only realize enhanced charge-separation efficiency, but also remain strong drive force for photocatalytic reaction, which exhibit great potentials toward simultaneously generating benzaldehyde (BAD) and H 2 . Herein, we report a noble-metal-free Z-scheme photocatalytic system consisting poly(dibenzothiophene-S,S-dioxide) (PSO) and α-Fe 2 O 3 for selective oxidation of BA with synchronous H 2 production. Such nanocomposites can effectively transfer and reduce the recombination of photoexcited charge carriers, therefore maintaining the oxidizability of holes of α-Fe 2 O 3 and the reducibility of electrons of PSO. As expected, PSO-Fe 2 O 3 with a mass of ∼5 mg under optimal composition ratio exhibited an impressive photocatalytic activity with BAD and H 2 yields up to 23.1 and 29.5 μmol h −1 , respectively, which is among the top photocatalytic performance reported so far for selective photocatalytic oxidation of BA in the aqueous solution.
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MODERN PHYSICS LETTERS B
·
2023
·
IF 1.9
Bin Wang,Miao Tang,Wanting Li,Wenjing Dong,Xiaowen Ge,Naibao Huang
In order to increase the activity and decrease the cost of oxygen reduction reaction (ORR) catalyst, S self-doped porous carbon nanospheres ORR catalyst was prepared by pyrolyzing the block copolymer F127 grafted with 3-mercapto-propanoicaci. The composition and microstructure were characterized and its electrochemical performance was also investigated in O 2 -saturated 0.1 M KOH solutions. The results showed that, among all the obtained samples, C-S-750 had a porous carbon nanosphere structure with the doped sulfur of 7.08 at % and a maximum specific surface area of 776.3 m 2 /g. The onset potential, half-wave potential and limiting current density of C-S-750 were 0.92 V (versus RHE) and 0.80 V (versus RHE) and 5.77 mA/cm 2 @0.45 V in O 2 -saturated 0.1 M KOH solution, respectively, which were close to that of commercial 20% Pt/C catalysts. This provides a new way to introduce and increase the doped heteroatom in metal-free ORR catalysts.
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EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Yajun Ren,ZhuanZhuan Zhang,Wenlong Xia,Qifeng Zhou,Xiaofeng Song
Poly(L-lactide) (PLLA) was one of the most well-known biodegradable polyesters. Although its thermo-responsive shape memory (SM) function has been studied by proper program, high transformation temperature is not suitable in some biomedical applications. Water-responsive SM polymer is an alternative choice and exhibits great potential because it is harmless to the cells and tissues of organisms. In the work, a novel PCL-(PMVS- s -PAA)-PCL-PTMG-PCL-(PMVS- s -PAA)-PCL copolymer was devised as an additive to endow PLLA with water-responsive SM capability. The incorporated PLLA was characterized by cross-section, water contact angle, differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Inserted PTMG segment and assisted ambient temperature were contributed to its SM behaviors. The shape fixation ratio and shape recovery ratio were 92.0% and 94.2%, respectively. The schematic diagram between internal microstructures and macroscopic properties was proposed. At the same time, the incorporated PLLA showed excellent toughness. So the obtained SM material would be promising for medical and biomimetic fields.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xianwei Geng,Ruowei Yi,Xiangfei Lin,Chenguang Liu,Yi Sun,Yingchao Zhao,Yinqing Li,Ivona Mitrovic,Rui Liu,Li Yang,Cezhou Zhao
Lithium-sulfur (Li–S) batteries have attracted more and more attention in recent years, as their theoretical capacity is several times larger than conventional lithium-ion batteries and they have a high energy density in secondary battery systems. In our work, a titanium carbide - titanium dioxide/single-walled carbon nanotube/sulfur (TiC–TiO 2 /SWCNT/S) cathode with high conductivity and effective polysulfides adsorption is prepared by a facile method for fabricating Li–S batteries. The batteries with this composite cathode show a good performance at 0.1 C due to relatively high utilization of sulfur, reaching 1338.6 mAh·g −1 specific capacity at first cycle and retaining 802.5 mAh·g −1 after 100 cycles. Meanwhile, it presents an excellent rate performance with 711.2 mAh·g −1 at 4 C, and recovers to 1006.9 mAh·g −1 when the current returns to 0.1 C. Also a slow capacity decay (0.045% decay rate per cycle) is observed at 1 C. These results suggest that a small amount of SWCNT can increase the conductivity of the whole composite to a great extent, and the strong adsorption ability of TiO 2 increases the cycle life. This work offers an efficient and low-cost strategy to obtain high performance batteries with great potential for commercial applications.
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SURFACE & COATINGS TECHNOLOGY
·
2018
·
IF 2.906
Yiqi Wei,Yinglin Yan,Yiming Zou,Mangmang Shi,Qijiu Deng,Nana Zhao,Shiyu Chen,Jiaming Lin,Rong Yang,Yunhua Xu
Lithium-sulfur (Li-S) battery processes high theoretical capacity (1675 mA h g −1 ) and energy density (2600 Wh kg −1 ), which was widely accepted as one of the most promising candidates for energy storage devices. In this presented study, bamboo-derived hierarchical porous carbon (BDPC) was adopted as a conducting substrate for containing S. Soft polystyrene (PS) and polyaniline (PANI), were prepared as coating layers. The main purpose is to figure out the specific roles that the polymer shells and the heteroatoms doped on polymer backbone play during cycles. The ternary products were characterized by structural analysis and electrochemical testing. The results indicate that, as compared to BDPC/S, the PS@BDPC/S electrode displays higher capacity retention during long-term cycles, especially at the high current rate. It is attributed to the integrated coating shell, which provides physical confinement and reserves spaces for restraining volume expansion. It is noted that the PANI@BDPC/S electrode presents a higher initial capacity, remarkable long-life performance, and excellent rate property. The outstanding performances are closely related to the nitrogen atom doped on PANI backbone, they provide not just abundant polar conducting sites for fast electron/Li-ion transport but strong chemical anchoring for restricting the migration of polysulfides . Therefore, our study poses a clearer understanding of the functionalized polymers used in Li-S battery.
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RSC Advances
·
2018
·Vol. 8
·期 66
·37811-37816
·
IF 2.936
Cejun Hu,Yingna Chang,Ruida Chen,Jijin Yang,Tianhui Xie,Zheng Chang,Guoxin Zhang,Wen Liu,Xiaoming Sun
The intrinsic polysulfide shuttle in lithium–sulfur (Li–S) batteries have significantly limited their practical applications. Conductive carbon materials with heteroatom doping and rich porosity is the most common strategy for the effective prevention of polysulfide shuttle, but are usually obtained with high costs and tedious procedures. Herein, we managed to obtain highly porous N, S-codoped carbon materials (NS-C) through treating waste plastic of polyvinylchloride (PVC) with KOH. The resulting NS-C was revealed to be highly efficient hosts for sulfur cathode, achieving large reversible capacities of 1205 mA h g−1 and 836 mA h g−1 at 0.1C and 1.0C, respectively, and remaining at 550 mA h g−1 after 500 cycles at 1C rate, showing an outstanding cycling stability. The significantly enhanced cycling performance was mainly ascribed to both the hierarchically porous structure and heavy N, S co-dopants, which respectively provided physical blocks and chemical affinity for the efficient immobilization of intermediate lithium polysulfides. The results provide an effective paradigm in the surface chemistry and sulfur cathode materials design for high-performance Li–S batteries and a new application for recycled plastic waste.
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