ACS Nano
·
2021
·
IF 15.881
Ting Huang,Yingjie Sun,Jianghua Wu,Jia Jin,Chaohui Wei,Zixiong Shi,Menglei Wang,Jingsheng Cai,Xing-Tao An,Peng Wang,Chenliang Su,Ya-yun Li,Jingyu Sun
Although lithium–sulfur (Li–S) batteries have long been touted as next-generation energy storage devices, the rampant dendrite growth at the anode side and sluggish redox kinetics at the cathode side drastically impede their practical application. Herein, a dual-functional fibrous skeleton implanted with single-atom Co–Nx dispersion is devised as an advanced modificator to realize concurrent regulation of both electrodes. The rational integration of single-atomic Co–Nx sites could convert the fibrous carbon skeleton from lithiophobic to lithiophilic, helping assuage the dendritic formation for the Li anode. Meanwhile, the favorable electrocatalytic activity from the Co–Nx species affording a lightweight feature effectively enables expedited bidirectional conversion kinetics of sulfur electrochemistry, thereby inhibiting the polysulfide shuttle. Moreover, the interconnected porous framework endows the entire skeleton with good mechanical robustness and fast electron/ion transportation. Benefiting from the synergistic effects between atomically dispersed Co–Nx sites and three-dimensional conductive networks, the integrated Li–S full batteries can achieve a reversible areal capacity (>7.0 mAh cm–2) at a sulfur loading of 6.9 mg cm–2. This work might be beneficial to the development of practically viable Li–S batteries harnessing single-atom mediators.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Shikai Wang,Dong Zhang,Dafeng Zhang,Xipeng Pu,Junchang Liu,Hengshuai Li,Peiqing Cai
Reasonable design of high-performance catalysts with heterojunction to suppress the combination of electron-hole pairs has become an appealing challenge in photocatalytic field. Herein, a novel hydrangea-like ZnIn 2 S 4 /FePO 4 with S-scheme heterojunction was constructed via an ultrasound-annealing process for photocatalytic H 2 evolution. The composites showed remarkable photocatalytic H 2 production performance (3.337 mmol h −1 g −1 ), which was approximately 7.5 times higher than that of blank ZnIn 2 S 4 (0.446 mmol h −1 g −1 ). The improved photocatalytic H 2 evolution was mainly ascribed to the accelerated electron-hole separation through the construction of S-scheme heterojunction in interface. Moreover, the hydrangea-like structure provided abundant active sites and huge specific surface area, which was conducive to the exceptional photocatalytic activity. Simultaneously, both experimental and Density Functional Theoretical calculation results provided strong evidence for the transfer path of photogenerated carriers following the S-scheme heterojunction, and the unique mechanism of photocatalytic H 2 production was proposed. In addition, the hydrangea-like ZnIn 2 S 4 /FePO 4 heterojunction photocatalyst showed a commendable stability with no distinct decrease after three cycle tests, demonstrating its potential as a recoverable photocatalyst. This work offered insights into the design and preparation of highly efficient photocatalysts with S-scheme heterojunction.
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Journal of Materials Chemistry C
·
2013
·Vol. 1
·期 10
·2014-2020
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IF 0
Wei-Dong Xiang,Hai-Long Yang,Xiao-Juan Liang,Jia-Song Zhong,Jing Wang,Le Luo,Cui-Ping Xie
We report the direct synthesis of highly luminescent Cu–Zn–In–S (CZIS) quaternary nanocrystals (NCs) in the non-coordinating solvent 1-octadecene (ODE) using chloride salts of Cu, In, and Zn as metal precursors in the presence of oleic acid and dodecanethiol. The resulting CZIS NCs had a narrow size distribution with an average diameter of 2.5 nm. The photoluminescence spectra can be tuned from 400 nm–850 nm by varying the Cu : Zn precursor ratio, and a relatively high photoluminescence quantum yield (PL QY) of 46% was obtained without any post-processing. The PL decay times of the as-prepared CZIS NCs were tunable via controlling the Cu : Zn precursor ratio and reaction time. The photoluminescence mechanism of the CZIS nanocrystals was discussed using the PL decay curves. EDS analysis revealed that the resulting CZIS NCs were Cu-deficient, and the internal defect-related emission process could be strongly promoted by the large Cu deficiency which is associated with the improvement of PL QY.
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RSC Advances
·
2022
·Vol. 12
·期 7
·4234-4239
·
IF 4.036
Dandan Li,Chengyang Wang,Xiaoying Yan,Shengqi Ma,Ran Lu,Chunhai Chen,Guangtao Qian,Hongwei Zhou
To obtain high thermostable materials for flexible display substrates, a series of copoly(benzimidazole imide)s was prepared using 5-amine-2-(4-aminobenzene)-1-phenyl-benzimidazole (N-PhPABZ) and 6(5)-amino-2-(4-aminobenzene)-benzimidazole (PABZ). Incorporating N-phenyl groups effectively healed the brittleness of the poly(benzimidazole imide)s (PBIIs) derived from pyromellitic dianhydride (PMDA), and the resultant homo- and copoly(benzimidazole imide)s displayed an outstandingly high glass transition temperature (Tg > 450 °C) and a low coefficient of thermal expansion (CTE < 10 ppm K−1). Furthermore, the influence of removing intermolecular hydrogen bonds on the properties of these poly(benzimidazole imide)s was systematically analyzed. These data provide a feasible method to prepare superheat-resistant poly(benzimidazole imide)s without H-bonding.
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PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·
IF 1.193
Xiao-Ping CHEN,Ya-Feng ZHUANG,Jian-Wei LIN,Jing-Hua CHEN,Zhi-Zhong HAN
Using citric acid and thiourea as precursors, sulfur-nitrogen co-doped dual emission carbon dots (DECDs) were prepared by a simple solvothermal method. At the excitation wavelength of 360 nm, DECDs have two emission peaks located at 465 nm (blue) and 592 nm (yellow-green) which are attributed by core and surface of DECDs. It is found that Fe 3+ ions can coordinate with oxygen-containing groups on DECDs, and then the electrons transfer from DECDs to Fe 3+ ions, which quench the fluorescence of DECDs. The fluorescence intensity is linear with the concentration of Fe 3+ ions in the range of 0–100 μM and the detection limit is 0.77 μM. Moreover, the designed sensor can be applied to detect Fe 3+ ions in tap water with high selectivity, which provides a basis for the quantitative detection of Fe 3+ ions. At the same time, DECDs can be used as a pH fluorescence probe. In the pH 2.5–11.5 range, the fluorescence increases with pH whilst the solution color changes, providing a visualization platform for pH detection. Moreover, the pH fluorescence probe can be used for intracellular pH fluorescence imaging in living cells, and DECDs have an excellent biocompatibility (e.g., cell viability remains about 80% after treatment for 24 h at 200 μg·mL −1 of DECDs). Therefore, DECDs has a certain application prospect in food detection, biological detection and determination of intracellular pH change.
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RSC Advances
·
2018
·Vol. 8
·期 66
·37631-37642
·
IF 2.936
Haiyang Wu,Rong Hu,Birong Zeng,Li Yang,Ting Chen,Wei Zheng,Xinyu Liu,Weiang Luo,Lizong Dai
In order to develop new phosphorus–nitrogen-containing flame retardants, three novel compounds of DOPO-substituted aminophenyl-s-triazine (TAT-DOPO) with different P/N element ratios were synthesized by Kabachnik–Fields reaction. TAT-triDOPO possessing three DOPO units in one molecule exhibited the best thermal stability. Besides, TAT-triDOPO and TAT-hexaDOPO possessing active hydrogen displayed the characteristics of reactive-type retardant, while TAT-enneaDOPO without active hydrogen represented additive-type retardant. The influences of three TAT-DOPO compounds on the thermal stability, flame retardancy and mechanical properties of the cured EP composites were investigated. Compared with pure EP, the char yields of EP/TAT-DOPO were increased. The LOI value and the UL-94 ratings of EP/TAT-triDOPO with a 5% loading were improved to 34.0% and V-0 grade. The PHRR, THR and HRC of EP/TAT-triDOPO were decreased by 25.7%, 21.1% and 25.4%, respectively. Furthermore, the incorporation of TAT-triDOPO could also improve the flexural strength and elastic modulus of cured EP. It was explained that the existence of active hydrogen atoms within TAT-triDOPO molecule can act as effective chemical cross-linking points in EP network. Finally, based on the SEM and TGA-FTIR analysis of pyrolytic products of cured EP/TAT-DOPO, it was deduced that the prepared TAT-DOPO flame retardant could exhibit both condensed phase and gas phase flame-retardancy mechanism.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Bin Lu,Guo-Tao Xiang,Jia-Lei Xu,Rui-Dong Shi,Na Chen,Yong-Da Hu,Raul D. Rodriguez,Jin-Ju Chen
Ternary transition metal sulfides are extensively considered as supercapacitor electrode materials due to their remarkable electrochemical properties . However, inferior electrical conductivity and structural stability severely limit their applications. Here, we address these limitations by introducing N-doped carbon dots (N-CDs) into Ni-Co-Mn-S nanoflowers via a two-step hydrothermal process followed by electrodeposition . Ni-Co-Mn-S nanoflowers feature a skeleton structure supporting rich ion transfer paths and abundant active sites, while electrodeposited N-CDs increase the electrical conductivity and enhance the cycling performance. The resulting Ni-Co-Mn-S@N-CDs material demonstrates a remarkable specific capacity of 2267 F g −1 at 1 A g −1 and maintains 96.2 % capacity after 10,000 cycles at 10 A g −1 . Moreover, this electrode material allows the development of hybrid supercapacitors with an impressive energy density of 61.6 Wh kg −1 at 800 W kg −1 and a superior capacitance retention of 89.0 % after 20,000 charge/discharge cycles at 5 A g −1 , alongside an excellent flexibility under various deformations. These findings represent a significant advancement in hybrid solid-state supercapacitors with promising implications for flexible energy storage technologies.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zhihan He,Linjia Li,Youyu Pang,Meng Cui,Yanhong Lin,Tengfeng Xie
The photocatalytic synthesis of hydrogen peroxide (H₂O₂) through the two-electron oxygen reduction reaction (ORR) presents a sustainable approach for the production of this industrially crucial compound. However, the photocatalytic efficiency is hindered by inefficient charge separation and sluggish interfacial reaction dynamics. In this study, we have fabricated Ag-modified sulfur vacancy-rich ultrathin ZnIn₂S₄ nanosheets (Ag-Sv-ZIS) as highly effective ORR catalysts, which display a H₂O₂ production rate of 8966 μmol g −1 h −1 under visible light irradiation (≥420 nm). In-situ transient surface photovoltage (TPV) spectra and femtosecond transient absorption (fs-TA) spectra indicate that the incorporation of Ag efficiently promotes the interfacial charge transfer between the photocatalyst and O₂. This research offers novel perspectives on the design of high-performance photocatalysts via the rational engineering of active sites and surface reaction dynamics for efficient photocatalytic H₂O₂ synthesis.
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PubMed
高影响因子
Nano Today
·
2024
·
IF 13.2
Xue Wang,Lili Xia,Hui Cheng,Kexing Li,Wei Feng,Xinyue Dai,Yu Chen
Reactive oxygen species (ROS) can induce oxidative damage to biomolecules within tumor cells, making them suitable for tumor therapy. However, the effectiveness of these ROS in treating tumor cells is restricted due to their short half-life or short diffusion distance. Sulfate radicals (SO 4 • – ), with a longer half-life and higher oxidation potential , provide a compelling alternative. Herein, we propose an efficient strategy to activate peroxymonosulfate (PMS) and produce SO 4 • – and •OH by using ultrasound-mediated Cu 2+ /Cu + redox cycling, enabling oxygen-independent synergistic tumor therapy. Notably, this redox cycle ensures the continuity of effective Cu + catalytic sites and prevents adverse effects on healthy tissues. The density functional theory results demonstrate that the decisive copper valence-conversion step is derived from the ultrasound-induced excitations of electrons in spin-down bands of Cu 2 (OH)PO 4 . This ultrasound-controlled transition metal valence alteration enables in-situ activation of a nontoxic drug to produce toxic reactive X (X = O/S) species in an O 2 -independent manner, offering an efficient, adaptable and universal methodology for treating hypoxic tumors in living systems.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Lilai Lu,Guoyu Wang,Yangfan Sun,Qingshan Li,Ting Pan,Yuanna Sun
The development of effective oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts is essential for the preparation of high-performance rechargeable zinc-air batteries. Porous carbon nanosheets (Fe/NSCN-900) doped with three elements, Fe, N, and S, were prepared from bacterial cellulose using a simple high-speed mixing-impregnation-high-temperature pyrolysis method for use as highly active electrocatalysts in rechargeable zinc-air batteries. The two-dimensional porous structure of Fe/NSCN-900 grants the material a high electrical conductivity and a large specific surface area, which is conducive to catalysis. The synergistic effect between Fe, N, and S elements endows Fe/NSCN-900 with exceptional ORR and OER electrocatalytic properties. The prepared Fe/NSCN-900 showed good bifunctional electrocatalytic activity with an OER overpotential of 310 mV (η 10 = 310 mV vs. RHE) at a current density of 10 mA cm −2 and obtained high ORR onset potential (0.94 V) and half-wave potential (0.82 V). In addition, when a rechargeable zinc-air battery assembled from Fe/NSCN-900 at a current density of 10 mA cm −2 underwent 1200 cycles (over 400 h), the charging and discharging voltage gaps remained nearly unchanged. This research paves the way for the development of high-performance bifunctional electrocatalysts for next-generation energy conversion and storage devices.
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Advanced Energy Materials
·
2024
·
IF 24.4
Ang Liang,Yue Jian,Yun Zhao,Shuo Chen,Jun Zhao,Zhuanghao Zheng,Jingting Luo,Hongli Ma,Xianghua Zhang,Zhenghua Su,Guangxing Liang
Enhancing the efficiency of Cu 2 ZnSn (S, Se) 4 (CZTSSe) thin-film solar cells requires the development of well-crystallized light-absorbing layers. A deep understanding of the role of precursor solution chemistry in film nucleation and crystal growth processes is essential. Insights into these processes enable the development of innovative strategies to enhance absorber quality, minimize detrimental bulk defects, and ultimately improve device performance. This study elucidates the condensation reactions between thiourea and metal cations, as well as the alcoholysis of 2-methoxyethanol (MOE), at different concentrations of precursor solutions. The primary focus of this study is implementing a simple and environmentally friendly innovative spin-coating strategy, aimed at optimizing Cu 2 ZnSnS 4 (CZTS) precursor films and adjusting the Se content within the film bulk to promote grain growth during selenization. This strategy effectively improves absorber morphology while suppressing the formation of deep-level defects, thereby enhancing carrier transport in both interfacial and bulk regions of the absorber layer. Consequently, CZTSSe absorbers with enhanced crystallinity and reduced defects are synthesized, resulting in a solar cell with an impressive efficiency of 14.10%. These findings underscore the potential for creating highly efficient kesterite CZTSSe solar cells through the manipulation of precursor solution chemistry using environmentally friendly solvents.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xiaoqi Peng,Zhentao Ma,Zixu He,Rongfeng Tang,Jianyu Li,Shuwei Sheng,Ting Wu,Yue Hu,Zhiyuan Cai,Zequan Jiang,Yuchen Li,Changfei Zhu,Ruiguo Cao,Xusheng Zheng,Tao Chen
For solar cells, interfacial chemical coordination, carrier transport, and energy alignment play critical roles in carrier transport and determine the final energy conversion efficiency. As an emerging solar technology, high-efficiency Sb 2 (S,Se) 3 solar cells typically utilize cadmium sulfide (CdS) as the interfacial electron transport layer. However, the poor chemical and electrical contact between F-doped SnO 2 (FTO) substrate and CdS presents a significant challenge to improving device performance. Here, an ultrathin SnO 2 layer is introduced, fabricated via chemical bath deposition, between FTO and CdS to address the interfacial coordination and transport problem. The non-invasive depth analysis based on synchrotron radiation X-ray photoelectron spectroscopy shows that this interfacial engineering approach facilitates the formation of S-Sn bonding at the FTO/CdS interface, which cannot be achieved on the conventional inert FTO surface. Additionally, the existence of an interfacial SnO 2 layer reduces the sulfur vacancy defect (V S ) in the CdS films, enhancing both electrical conductivity and crystallinity. Therefore, the solar cell demonstrates significantly enhanced carrier separation and transport performance. Ultimately, the Sb 2 (S,Se) 3 solar cells achieve a record fill factor exceeding 73%, with a championefficiency of 10.58%. This study presents an effective interfacial engineering strategy to enhance charge transport properties for high-performance Sb 2 (S,Se) 3 solar cells.
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