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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Small Methods
·
2024
·
IF 10.7
Yue Jian,Litao Han,Xiangrui Kong,Tianliang Xie,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yuena Meng,Yafang Qi,Guangxing Liang,Xianghua Zhang,Zhi Zheng,Sixin Wu
High-crystalline-quality absorbers with fewer defects are crucial for further improvement of open-circuit voltage ( V OC ) and efficiency of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells. However, the preparation of high-quality CZTSSe absorbers remains challenging due to the uncontrollability of the selenization reaction and the complexity of the required selenization environment for film growth. Herein, a novel segmented control strategy for the selenization environment, specifically targeting the evaporation area of Se, to regulate the selenization reactions and improve the absorber quality is proposed. The large evaporation area of Se in the initial stage of the selenization provides a great evaporation and diffusion flux for Se, which facilitates rapid phase transition reactions and enables the attainment of a single-layer thin film. The reduced evaporation area of Se in the later stage creates a soft-selenization environment for grain growth, effectively suppressing the loss of Sn and promoting element homogenization. Consequently, the mitigation of Sn-related deep-level defects on the surface and in the bulk induced by element imbalance is simultaneously achieved. This leads to a significant improvement in nonradiative recombination suppression and carrier collection enhancement, thereby enhancing the V OC . As a result, the CZTSSe device delivers an impressive efficiency of 13.77% with a low V OC deficit.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Xuan Miao,Xiao Bai,Peng Zhang,Bolong Wang,Shuyan Wang,Yuzhu Yang,Zenggang Lin,Sixia Li,Binbin Wang,Weisheng Liu
Incorporating two-phase heterojunctions with matching band structures represents a promising strategy for developing photocatalysts with enhanced efficiency. This work prefers a novel approach that employs a template-assisted strategy based on a porous structured UCCN@CeO2 0D/2D S-scheme heterojunction. The proposed method aims to improve photocatalytic activity by harnessing the synergistic effects of monodispersed CeO2 nanoparticles and ultrathin N-defect CN nanosheets. The catalyst demonstrates a remarkable photocatalytic hydrogen evolution rate, reaching an impressive value of 5.59 mmol h–1 g–1 when subjected to simulated sunlight irradiation. Furthermore, the photocatalyst maintains a substantial activity level, yielding 2.35 mmol h–1 g–1 under visible light (≥400 nm). The significant improvement in the photocatalytic performance of the UCCN@CeO2 catalyst is attributed to the unique structural design and effective charge separation facilitated by the S-scheme mechanism. Kelvin probe force microscopy, theoretical calculations, and femtosecond transient absorption spectroscopy affirm the efficient charge transportation across the catalyst interface. Additionally, electron spin resonance spectroscopy measurements further support the charge transfer pathway in the S-scheme. This research presents an innovative approach for designing and developing CN-based catalysts featuring S-scheme heterojunctions, aiming to improve their efficiency and practical use in photocatalytic applications.
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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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APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Ya-Wen Zeng,De-Kun Ma,Wei Wang,Jing-Jing Chen,Lin Zhou,Yi-Zhou Zheng,Kang Yu,Shao-Ming Huang
For practical application, it is highly desirable to obtain carbon dots (CDs) through environmentally benign synthetic route, using green raw materials. On the other hand, at present, most of CDs reported in the literature showed blue, green and yellow emission. Therefore it is still necessary to develop new strategy to obtain CDs with longer wavelength emission in order to expand their application range. Toward this end, in this study, N, S co-doped CDs were synthesized through one-pot condensation polymerization and carbonization reactions under hydrothermal conditions, using two different amino acids as raw materials. Taking the reaction of l -serine with l -cystine as an example, the as-obtained products were characterized by various techniques such as transmission electron microscopy, elemental analysis, Fourier-transform infrared spectrum, X-ray photoelectron spectra, and so on. Interestingly, N, S co-doped CDs displayed unique orange emission at room temperature. The possible photoluminescence mechanism of N, S co-doped CDs was proposed. Furthermore, the as-synthesized N, S co-doped CDs were directly applied in the imaging of peritoneal macrophages of mice.
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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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EUROPEAN FOOD RESEARCH AND TECHNOLOGY
·
2020
·Vol. 246
·期 9
·1857-1865
·
IF 2.366
Yang Fanfan,Xu Long,Liu Xiang,Chen Chen,Dias Alberto C. P.,Zhang Xiaoying
Abstract Bisphenol S (BPS) is a major alternative to Bisphenol A (BPA) newly applied in food packing material and disrupts reproductive and developmental endpoints through endocrine pathways. This study aimed to develop a rapid, sensitive, and accurate chemiluminescence immunoassay (CLIA) for the detection of BPS in canned beverage. Anti-BPS monoclonal antibody (mAb) was generated by immunizing Balb/c mice with immunogen (BPS–BSA conjugation). CLIA assay conditions, including 3-[9-(((3-( N -succinimidyloxycarboxypropyl) [4-methxylphenyl] sulfonyl) amine) carboxyl]-10-acridiniumyl)-1-propanesulfonate inner salt (NSP-SA-NHS) labeling ratio (1:40), antigen concentration (1 μg mL −1 ) and antibody titer (1:8000; 125 ng mL −1 in PBS (0.01 M, pH 7.4)) were determined, respectively. The half inhibition concentration (IC 50 ), detection limit (IC 10 ), and working range of the CLIA in canned beverage were 0.04, 1.48, and 0.32–5 ng mL −1 , respectively. Cross-reactivity with other bisphenols (4,4′-thiodiphenol, Bisphenol F, 4,4′- dihydroxy benzophenone, Bisphenol A and Bisphenol B) was less than 0.56%, and the recovery rates of BPS in canned beverage ranged from 80 to 109.2% (intra-assay) and from 82 to 108.4% (inter-assay). The results of CLIA were compared with high-performance liquid chromatography–UV (HPLC–UV) analysis, showing a good correlation of 0.956. After proper sample pre-treatment, this method allows relatively large amounts of sample analysis in a limited time period (30 min). Thus, it was deemed suitable and efficient for routine screening of BPS in canned beverage. Graphic abstract
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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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JOURNAL OF ALLOYS AND COMPOUNDS
·
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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SOLAR ENERGY
·
2021
·
IF 5.742
Yulin Liu,Bin Xu,Xiaoshuang Lu,Xiatong Qin,Pingxiong Yang,Junhao Chu,Ye Chen,Lin Sun
Excellent crystallinity and uniform composition distribution of the Cu 2 ZnSn(S,Se) 4 (CZTSSe) absorber are indispensable factors for the fabrication of photovoltaic device with excellent performance. Here, a facile and effective method is developed to improve the composition uniformity of CZTSSe absorber. It is inspiring that by replacing the acetates with chlorides as the solutes in the precursor solution , the issue of the composition non-uniformity especially for the distribution of Cu and Sn, which is ascribed to the rich-carbon in the acetate-based CZTSSe absorber, is able to be avoided. Due to less organic residues and composition uniformity, the grain size and the crystallinity of absorber could be significantly enhanced, and the photovoltaic performance of chloride-based CZTSSe solar cell is improved remarkably. Furthermore, substituting CuCl 2 with CuCl as the copper source in the precursor solution is able to obtain a stable solution, and the quality of CZTSSe absorber is further improved. As a consequence, 8.48% efficient CZTSSe solar cell has been yield.
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Huazhen Sun,Beibei Tang,Peiyi Wu
Metal–organic frameworks (MOFs) are being intensively explored as filler materials for polymeric proton exchange membranes (PEMs) due to their potentials for the systematic design and modification of proton-conducting properties. S-UiO-66, a stable MOF with functional groups of −SO3H in its ligands, was selected here to prepare S-UiO-66@graphene oxide (GO) hybrid nanosheets via a facile in situ growth procedure, and then a series of composite PEMs were prepared by hybridizing S-UiO-66@GO and sulfonated poly(ether ether ketone) (SPEEK). The resultant hybrid nanosheets not only possessed abundant −SO3H groups derived from the ligands of S-UiO-66 but also yielded a uniform dispersion of S-UiO-66 onto GO nanosheets, thus effectively eliminating the agglomeration of S-UiO-66 in the membrane matrix. Thanks to the well-tailored chemical composition and nanostructure of S-UiO-66@GO, the as-prepared SPEEK/S-UiO-66@GO composite PEMs present a significant increase in their proton conductivity under various conditions. In particular, the proton conductivity of the SPEEK/S-UiO-66@GO-10 membrane was up to 0.268 S·cm–1 and 16.57 mS·cm–1 at 70 °C-95% RH and 100 °C-40% RH (2.6 and 6.0 times that of recast SPEEK under the same condition), respectively. Moreover, the mechanical property of composite membranes was substantially strengthened and the methanol penetration was well-suppressed. Our investigation indicates the great potential of S-UiO-66@GO in fabricating composite PEMs and also reveals that the high proton conductivity of MOFs can be fully utilized by means of MOF/polymer composite membranes.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-14
·
IF 10.2
Zhao Yitong,Bo Tao,Wang Chenfei,Yao Dingjin,Pan Chaolan,Xu Weiyi,Zhou Hao,Li Ming,Zhang Si
Extensive efforts have been dedicated to enhancing the expression of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) in cancer cells for the development of effective cancer treatments. However, highly safe and efficient delivery of TRAIL gene remains a significant challenge, especially using cationic polymers. Here, a series of highly branched-linear poly(β-amino ester)s (H-LPAEs) are developed through a unique oligomer branching strategy. H-LPAEs exhibit a more uniform distribution of linear segments and branching units, leading to excellent DNA condensation and favorable physicochemical properties of H-LPAE/DNA polyplexes. In SW1353 and BMSC cells, the optimized H-LPAEs, H-LPAE B4−S5−TMPTA , achieves superior gene transfection efficiency of 58.0% and 33.4%, which were 2.5-fold and 2.0-fold higher than that of the leading commercial gene transfection reagent, Lipofectamine 3000. Excitingly, H-LPAE B4−S5−TMPTA mediated 56.7% and 28.1% cell apoptosis in HepG2 cells and HeLa cells highlighting its potential application in cancer gene therapy. In addition, locally administered H-LPAE B4−S5−TMPTA delivered TRAIL DNA to HepG2 xenograft tumors and inhibited tumor growth in vivo. This study not only proposes a novel strategy for synthesizing poly(β-amino ester)s with a unique branched-linear topology but also identifies a promising candidate for highly efficient TRAIL gene transfection.
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高影响因子
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