Carbon Energy
·
2023
·Vol. 5
·期 11
·e343
·
IF 20.5
Xin Liu,Kun Wang,Ying Liu,Fuhua Zhao,Jianjiang He,Hao Wu,Jianfei Wu,Han-Pu Liang,Changshui Huang
The inherent shortcomings of a zinc anode in aqueous zinc-ion batteries (ZIBs) such as zinc dendrites and side reactions severely limit their practical application. Herein, to address these issues, an ion-oriented transport channel constructed by graphdiyne (GDY) nanowalls is designed and grown in situ on the surface of a zinc electrode. The vertically stacked GDY nanowalls with a unique hierarchical porous structure and mechanical properties form a nanomesh-like interface on the zinc electrode, acting as an ion-oriented channel, which can efficiently confine the segmented growth of zinc metal in microscopic regions of hundreds of nanometers. In those microscopic regions, the uniform domain current density is effortlessly maintained compared with a large surface area, thereby inhibiting zinc dendrites effectively. Besides, due to the presence of the ion-oriented channel, the modified zinc anode demonstrates long-term stable zinc plating/stripping performance for more than 600 h at 1 mAh cm −2 in an aqueous electrolyte. In addition, full-cells coupled with MnO 2 show high specific capacity and power density, as well as excellent cycling stability with a capacity retention of 82% after 5000 cycles at 1 A g −1 . This work provides a feasible and accessible surface engineering approach to modify the electrode interface for confined and dendrite-free zinc deposition in aqueous ZIBs.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
·
IF 6.9
Zhu Kou,Jinhui Wang,Xingrui Tong,Pengyang Lei,Yi Gao,Siyu Zhang,Xinpan Cui,Sixin Wu,Guofa Cai
Electrochromic smart windows provide an important route to reduce building energy consumption by dynamically adjusting the transmission of visible and near-infrared light. However, the requirement for an external electrical supply greatly limits their application in energy-saving buildings. Herein, we develop a novel photovoltaic (PV) cell-powered electrochromic energy storage smart window prototype by the combination of nickel-cobalt bimetal oxide electrochromic window and Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cell, which not only realizes the function integration of self-power and intelligent solar radiation regulation, but also extends its function to energy storage. Specifically, the obtained NiCoO 2 electrochromic films display a large optical modulation (60.0% at 550 nm), fast switching time (7.6/11.4 s), outstanding stability and excellent rate capability. Based on the achieved NiCoO 2 film and TiO 2 film, high-performance electrochromic energy storage smart windows (EESW) were further assembled and demonstrated excellent compatibility with CZTSSe solar cell. Benefiting from the unique merits of CZTSSe cell, the self-powered EESW exhibits excellent optical modulation (56.0% at 550 nm) and fast coloration speed (17 s). Moreover, the self-powered EESW can serve as a power source to drive external electronics. Our exploration of multi-functional smart windows offers an effective strategy to realize a highly efficient low-energy building in the future.
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ChemistrySelect
·
2023
·Vol. 8
·期 10
·e202204406
·
IF 2.1
Chibin Pu,Zhongxi Huang,Lihua Huang,Qian Shen,Changmin Yu
Graphical We firstly reported the direct detection and quantification of His-tagged protein based on intramolecular rigidification induced emission in dilute solution, achieved the real-time and fast fluorescent “On” response of His-tagged proteins in protein solution. Our probe could be used in fluorescent labeling of proteins with simple procedure, high quality and low background interference. Histidine tag (His-tag) is a representative epitope tag, which has been widely used in the purification or immobilization of recombinant proteins. In this study, a novel probe CTPE-IDA-Ni 2+ based on intramolecular rigidification induced emission for fluorescence detecting His-tagged proteins is successfully developed and experimentally demonstrated. This detecting system is based on TPE derivative incorporated IDA-Ni 2+ moiety for real-time detection of His-tagged proteins. In the presence of His-tagged proteins, the IDA-Ni 2+ -His-tag complex was formed, which restricted the rotation of two phenyl rings linked with TPE and subsequently resulting in the fluorescence turn on. Results have shown that our probe could directly detect His-tagged proteins with good selectivity and fast response within 10 min. In addition, we have proved that this system could be used in fluorescent labeling of His-tagged protein instead of traditional Western blot assay with simple procedure, high quality and low background interference, as well as without aggregation-caused quenching (ACQ) problems like some organic dyes.
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ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Yan Jia,Lili Xu,Lancheng Wang,Kun Yan,Jieru Chen,Pengcheng Xu,Bin Di,Fang Yan,Chi Hu
With the aggravated burden of opioid use disorder spreading worldwide, demands for new forms of opioid receptor agonist/antagonist constitute immense research interest. The Mu-opioid receptor (MOR) is currently in the spotlight on account of its general involvement in opioid-induced antinociception, tolerance and dependence. MOR binding assay, however, is often complicated by difficulty in MOR separation and purification , as well as the tedious procedure in standard biolayer interferometry and surface plasmon resonance measurements. To this end, we present TPE2N as a light-up fluorescent probe for MOR, which exhibits satisfactory performance in both live cells and lysates. TPE2N was elaborately designed based on the synergistic effect of twisted intramolecular charge-transfer and aggregation-induced emission by incorporating a tetraphenylethene unit to emit strong fluorescence in a restrained environment upon binding with MOR through the naloxone pharmacore. The developed assay enabled high-throughput screening of a compound library, and successfully identified three ligands as lead compounds for further development.
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iScience
·
2023
·
IF 5.8
Li Zhang,Kun-kun Deng,Kai-bo Nie,Cui-ju Wang,Chao Xu,Quan-xin Shi,Yu Liu,Jie Wang
Summary Incorporating graphite/graphene into a Mg alloy matrix is a promising approach for developing lightweight heat dissipation materials. However, carbon material is inherently incompatible with Mg because of their distinctly different surface characteristics, resulting in the challenge of composite fabricating and interface controlling. Herein, a new strategy of in situ interfacial modification was proposed to achieve excellent thermal conductivity and mechanical properties in graphite/Mg composites. A super-nano CaCO 3 interfacial layer was reported in this paper. The detailed interfacial structure, reaction thermodynamics and kinetics, and interface strengthening mechanisms were analyzed and discussed. Several preferential epitaxial relationships of the Mg/CaCO 3 interface were revealed, which are conducive to minimize the interfacial energy, stabilize and strengthen the interface. Moreover, strong ionic bond of graphite/CaCO 3 interface was demonstrated. The strong chemical interface bonding of graphite-Mg via in situ interface modification facilitates both the interfacial cohesion and interfacial thermal conduction, which endows the graphite/Mg composites with superior strength–thermal conductivity synergy.
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Materials
·
2023
·Vol. 16
·期 7
·2869
·
IF 3.4
Quanzhen Sun,Jianlong Tang,Caixia Zhang,Yaling Li,Weihao Xie,Hui Deng,Qiao Zheng,Jionghua Wu,Shuying Cheng
Flexible CZTSSe solar cells have attracted much attention due to their earth-abundant elements, high stability, and wide application prospects. However, the environmental problems caused by the high toxicity of the Cd in the buffer layers restrict the development of flexible CZTSSe solar cells. Herein, we develop a Cd-free flexible CZTSSe/ZnO solar cell. The influences of the ZnO films on device performances are investigated. The light absorption capacity of flexible CZTSSe solar cells is enhanced due to the removal of the CdS layer. The optimal thickness of the ZnO buffer layers and the appropriate annealing temperature of the CZTSSe/ZnO are 100 nm and 200 °C. Ultimately, the optimum flexible CZTSSe/ZnO device achieves an efficiency of 5.0%, which is the highest efficiency for flexible CZTSSe/ZnO solar cells. The systematic characterizations indicate that the flexible CZTSSe/ZnO solar cells based on the optimal conditions achieved quality heterojunction, low defect density and better charge transfer capability. This work provides a new strategy for the development of the environmentally friendly and low-cost flexible CZTSSe solar cells.Keywords:Cd-free flexible CZTSSe/ZnO solar cells;ZnO buffer layer;CZTSSe/ZnO heterojunction;buffer layer optimization
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yaqiong Du,Fengling Wang,Meihua Hu,Qianku Hu,Aiguo Zhou
Mo 2 Ga 2 C is a novel member of MAX phases, which is a family of ternary carbide/nitride with layered structure. The stability and wettability of Mo 2 Ga 2 C in molten metals are crucial for the application of Mo 2 Ga 2 C in the field of composite materials. In this work, the stability and wettability of Mo 2 Ga 2 C in three molten metals (Pb, Sn and Zn) were investigated. Mo 2 Ga 2 C was mixed with metal powders and annealed at different temperatures under vacuum. At 700 °C, Mo 2 Ga 2 C was not stable in any of the three molten metals. The decomposition of Mo 2 Ga 2 C was affected by the type of metal matrix as well as the reaction temperature. Mo 2 Ga 2 C decomposed at 550 °C in Pb, at 450 °C in Sn, or at 650 °C–750 °C in Zn. To characterized the wettability of these metals with Mo 2 Ga 2 C, the contact angle of molten metals with Mo 2 Ga 2 C at 650 °C were measured, which are 103° for Pb, 126° for Sn and 0° for Zn, respectively. Mo 2 Ga 2 C has good wettability with Zn and is not wetted by Pb and Sn.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Junjie Fu,Afei Zhang,Dongxing Kou,Zewen Xiao,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yafang Qi,Zhi Zheng,Sixin Wu
One important issue limiting the development of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells is the severe recombination loss at CZTSSe/Mo(S,Se) 2 /Mo back contact, primarily arising from the non-matched potential barrier and inferior electric contact between absorber and weak n -type Mo(S,Se) 2 interfacial layer. It is expected that a p-type Mo(S,Se) 2 can effectively improve the hole extraction and enhance the device performance. In this work, we propose a plausible direction to build up an electrically benign back surface field by in-situ doping Mo(S,Se) 2 with group VB elements (TM = V, Nb and Ta). It is turned out that the generated V Mo , Nb Mo , or Ta Mo shallow acceptors could convert Mo(S,Se) 2 from weak n -type to p-type conductivity and increase its work function ( W F ) and hole concentration. With the contact of p-type absorber ( W F,absorber < W F,Mo(S,Se)₂ ), a benign ohmic contact with favorable downward band bending is formed, thereby accelerating the holes extraction and minimizing interface recombination loss. With significant gains in open-circuit voltage ( V oc ) and fill factor (FF), the Mo(S,Se) 2 :Ta device finally increases the efficiency from 10.82 % to 12.72 %. This convenient in-situ Mo(S,Se) 2 doping strategy is different from previous complicated or unstable cases and should serve as a basis for high-quality back contact engineering in kesterite photovoltaics.
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ChemSusChem
·
2023
·Vol. 16
·期 7
·e202201964
·
IF 8.4
Jiankang Sun,Zhengyun Wang,You Xu,Tiansui Zhang,Deyu Zhu,Guangfang Li,Hongfang Liu
Graphical Beauty and the yeast : N-doped porous carbon electrocatalyst is synthesized by the activation and pyrolysis of yeast. Additional Co-based active sites are introduced into the porous structure by exploiting the strong interaction between activated yeast and Co–Phen complex. The obtained composite CoNC electrocatalyst demonstrates significantly enhanced catalytic activity and stability for the oxygen reduction reaction. Biomass-derived carbon materials have received extensive attention for use in high-performance electrocatalysts. In this study, a highly efficient electrocatalyst is developed with Co nanoparticles anchored on N-doped porous carbon material (CoNC) by using yeast as a biomass precursor through a facial activation and pyrolysis process. CoNC exhibits comparable catalytic activity with commercial 20 % Pt/C for the oxygen reduction reaction (ORR) with a half-wave potential of 0.854 V. A home-made primary Zn–air battery exhibited an open circuit potential of 1.45 V and a peak power density of 188 mW cm −2 . Moreover, the discharge voltage of the primary battery maintained at a stable value up to 9 days. The enhanced performance of CoNC was probably ascribed to its high content of pyridinic-N and graphitic-N species, extra Co loading and porous structure, which provided sufficient active sites and channels to promote mass/electron transfer for ORR. This work provides a promising strategy to develop an efficient non-noble metal carbon-based electrocatalyst for fuel cells and metal–air batteries.
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ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Haifang Liu,Jie Yang,Zhaohui Li,Lehui Xiao,Aaron Albert Aryee,Yuanqiang Sun,Ran Yang,Hongmin Meng,Lingbo Qu,Yuehe Lin,Xiaobing Zhang
Carbon dots (CDs) are emerging as powerful tools for biosensing and bioimaging because of their intrinsic properties such as abundant precursors, facile synthesis, high biocompatibility, low cost, and particularly robust tunability and stability. In this work, a new type of CDs was prepared from m-phenylenediamine and folic acid by hydrothermal method. Interestingly, the as-prepared CDs show blue emission in non-hydrogen-bonding solution, whereas robust green emission in hydrogen-bonding solution. Based on this phenomenon, a novel fluorescence sensing mechanism named as hydrogen-bonding-induced emission (HBIE) was proposed. The HBIE-CDs have large Stokes shift (141 nm) in water, good biocompatibility, and ultrasmall size, which facilitates their translocation into living cells. Very importantly, the as-prepared HBIE-CDs show strong affinity toward nucleic acid without interference from other biological species. After binding with DNA/RNA through hydrogen bond, as high as 6-fold green fluorescence enhancement of HBIE-CDs was observed. Since the nucleus is rich in DNA/RNA, these HBIE-CDs were successfully used for rapid and, especially, wash-free subcellular in situ imaging of the nucleus in living cells in a fluorescence turn on mode, which has a great practicability to be used for nucleus imaging in bioanalytical studies and clinical applications.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 33
·47887
·
IF 2.188
Tiantang Fan,Wuyou Ye,Beibei Du,Qin Zhang,Li Gong,Jiafeng Li,Shengli Lin,Zhongyong Fan,Qing Liu
A series of high-molecular-weight terpolymers named PTG- b -LG and PT- b -LG were synthesized based on the macroinitiators of PTG copolymers and PTMC, respectively. In vitro degradation of PTG- b -LG and PT- b -LG was carried out by immersing into PBS, in comparison with that of P L LA. Mass loss, water uptake, GPC, DSC, WAXD, and 1 H NMR were examined for the degradation study. It was found that PTG- b -LG degraded faster than PT- b -LG and P L LA due to the Di -random block structure, which had lower regularity of chain and lower crystallinity. The compositional changes appeared to be more complex, but the molar mass decreased owing to chain fragmentation caused by hydrolysis. Moreover, morphological changes were also observed during the degradation in all situations with the crystallization of by-products and a preferential degradation of amorphous domains. Specifically, PTG- b -LG presented an adjustable degradation rate and may be used for the fabrication of totally biodegradation stents in the future. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47887.
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TALANTA
·
2019
·
IF 4.916
Shuyan Ge,Jingbo He,Chenxing Ma,Jiyang Liu,Fengna Xi,Xiaoping Dong
Heteroatom doping can endow graphene quantum dots (GQDs) with various new or improved structural, optical and physicochemical properties. In contrast to the widely reported oxygen, nitrogen or sulfur doping in GQDs, simple and scalable synthesis of boron-doped GQDs (B-GQDs) with high yield and quantum yields remains challenge. In this work, B-GQDs are one-step synthesized and serve as the fluorescence probes for the fabrication of sensors towards Fe 3+ ion or phosphate (Pi) as well as biosensor towards cytochrome C (Cyt C). The B-GQDs are facile synthesized using one-step bottom-up molecular fusion between 1,3,6-trinitropyrene and borax in sodium hydroxide under hydrothermal process. The synthesis can be performed using large volume autoclave (500 ml) with a high yield of 71%, indicating possibility for gram-scale production of B-GQDs. The as-prepared B-GQDs exhibit single or bilayer graphene structure, high crystallinity , uniform size, bright (absolute photoluminescence quantum yield of 16.8%) and excitation-independent green fluorescence (maximum excitation wavelength and emission wavelength of 480 nm and 520 nm, respectively). Successful doping of B atoms in the lattice of GQDs enables high selectivity towards Fe 3+ . Based on quenching of fluorescence of B-GQDs by Fe 3+ (turn-off model), detection of Fe 3+ (with limit of detection-LOD of 31.2 nM) and Fe 3+ -rich Cyt C (with LOD of 5.9 μg/ml) are demonstrated. As Pi can recover Fe 3+ -quenched fluorescence of B-GQDs (turn-off-on model), indirect fluorescent detection of Pi is also achieved with LOD of 340 nM. In addition, detection of Fe 3+ , Cyt C and Pi in real samples is achieved.
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