DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 27
·9346-9355
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IF 4
Qihang Chen,Wenna Zhao,Zihao Huang,Guochang Li,Kai Tao,Lei Han
Binary transition metal sulfides are considered to be a promising material for supercapacitors, possessing richer electrochemically active sites and superior electrochemical performance. Metal–organic frameworks (MOFs) are often used as self-sacrificing templates in the preparation of metal sulfides. Usually, direct sulfidation of MOFs tends to cause collapse of the morphological structure and blockage of the ion transport channels, so that the morphology of the original MOF template can be well preserved by using pyrolysis followed by S2− ion exchange. In this paper, we first prepared NiCo–MOF-74 on nickel foam by an in situ transformation method from layered double hydroxides (LDHs) through a ligand exchange reaction. Then, CoNi2S4 was synthesized in two steps involving the pyrolysis of NiCo–MOF-74 and a subsequent S2− ion exchange reaction. Compared with direct sulfidation, this synthetic strategy can well maintain the rod-like morphology of MOF-74 arrays and prevent structural collapse. The surface of CoNi2S4 has a fine nanosheet structure, which exposes more active sites and shows a high specific capacitance of 7.50 F cm−2 at 2 mA cm−2 and an excellent Coulomb efficiency (96.32%). In addition, the hybrid supercapacitor assembled with activated carbon shows a high energy density of 0.64 mW h cm−2 at a power density of 1.64 mW cm−2 and a high capacitance retention of 88.39% after 5000 cycles. These results indicate that rod-shaped CoNi2S4 can be controllably prepared from MOF-74 involving an exchange reaction and has promising application in high-performance supercapacitors.
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MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Qirun Wang,Yanjie Duan,Zhixiong Huang,Xiaowei Xu,Jichao Shi,Lin Lin,Sheng Han,Runping Jia,Shufang Chang,Dandan Wu
Electrocatalysts with densely exposed sites and high intrinsic activity are desired for high-efficiency oxygen evolution reaction (OER). In this paper, we report the microwave assisted solvothermal growth of NiMoO 4 nanoflowers on electrodeposited Ni(OH) 2 nanosheets , forming a high specific surface area (132.5 m 2 g -1 ) nanoflower-like NiMoO 4 /Ni(OH) 2 configuration supported on a conductive nickel foam (NF) substrate. The as-prepared NiMoO 4 /Ni(OH) 2 /NF behaved efficiently as a self-supported 3D catalyst electrode for alkaline OER, compared with commercial RuO 2 (298 mV overpotential at 10 mA cm −2 and Tafel slope of 88.6 mV dec −1 ), needing a low overpotential of 292 mV to attain 10 mA cm −2 , with a small Tafel slope of 85.0 mV dec −1 and good stability for 100 h running at 10 mA cm −2 in 1.0 M KOH. Aside from enlarged surface area for more exposed edge sites for catalysis, the modulated synergy between Ni and Mo atoms probably contributes to enhanced intrinsic activity. A more electronegative Mo increases the electron density of Ni, thus accelerating the deprotonation of intermediates and driving the transition from Ni to NiOOH, leading to modulated thermodynamics and kinetics for OER catalysis.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Jingxia Wang,Xiaohan Shan,Qiang Xue,Yao Liu,Zeyu Liu,Lin He,Xiaolei Wang,Changchun Zhu
In this work, we firstly developed a laser-induced graphene (LIG) electrode modified by gold nanoparticles (AuNPs) and glycine-modified nanocarbon (Gly-C), and used it to detect nitrite by linear scanning voltammetry . The physical and electrochemical characteristics of the electrodes were characterized using scanning electron microscopy, energy dispersive spectroscopy analysis, fourier transform infrared spectroscopy , and contact angle analysis. Our findings demonstrated that the electrocatalytic oxidation of nitrite can be enhanced by the successful loading of AuNPs, and Gly-C enhances electrode hydrophilicity and promotes nitrite adsorption capacity of the electrode surface. Under optimal conditions, the linear of the sensor is 7 ∼ 700 μg/L and 700 ∼ 1050 μg/L, and the detection limit is 0.84 μg/L. The anti-interference, repeatability, and stability of this sensor are outstanding. Recovery rates of the sensor in the actual groundwater and tap water varied from 94 to 123 %, and the relative standard deviation was less than 6.06 %. Our findings offer a potentially effective method for on-site monitoring of nitrite in aquatic environments.
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Journal of Energy Storage
·
2023
·
IF 9.4
Zhongtai Lin,Xue Li,Shengnan Li,Bin Li,Jianxu Ding,Yongqin Han,Tingxi Li,Chunping Hou,Yong Ma
Layered double hydroxide (LDH) has become one of the prospective electrode materials due to high specific area, good cycle stability and high power density. However, large internal resistance limits its application in energy storage. The introduction of materials with high electrical conductivity is expected to solve this problem. In here, carbon cloth/MXene/PANI/CoNi-LDH (CC/MXPACN) composites are fabricated by the electrodeposition of PANI and CoNi-LDH on the CC coated with MXene . The effects of electrodeposition time on the electrochemical performances are investigated in detail. The asymmetric supercapacitor is assembled with CC/MXPACN as the positive electrode and activated carbon (AC) as the negative electrode . The device has a 1.6 V voltage window. After 10,000 cycles at a current density of 5 A g −1 , the capacitance retention rate is still 91 %. At the power density of 399.95 W kg −1 , the energy density of 39.33 Wh kg −1 is provided. Even at the high power density of 2400.35 W kg −1 , the energy density can still reach 27.27 Wh kg −1 . The asymmetric device has high specific capacitance, long-term stability and good power density and energy density, which exhibit a huge potential in energy storage applications .
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JOURNAL OF APPLIED TOXICOLOGY
·
2023
·
IF 3.3
Jing Zhao,Guochao Song,Fengyi Weng,Yue Li,Bin Zou,Jingyi Jin,Dongming Yan,Xin Sun,Chenghai Liu,Fu-rong Qiu
The aim of this study was to determine the effect of tauroursodeoxycholic acid (TUDCA) on the alpha-naphthylisothiocyanate (ANIT)-induced model of cholestasis in mice. Wild-type and farnesoid X receptor (FXR)-deficient ( Fxr −/− ) mice were used to generate cholestasis models by gavage with ANIT. Obeticholic acid (OCA) was used as a positive control. In wild-type mice, treatment with TUDCA for 7 days resulted in a dramatic increase in serum levels of alanine aminotransferase (ALT), with aggravation of bile infarcts and hepatocyte necrosis with ANIT-induction. TUDCA activated FXR to upregulate the expression of bile salt export pump (BSEP), increasing bile acids (BAs)-dependent bile flow, but aggravating cholestatic liver injury when bile ducts were obstructed resulting from ANIT. In contrast, TUDCA improved the liver pathology and decreased serum ALT and alkaline phosphatase (ALP) levels in ANIT-induced Fxr −/− mice. Furthermore, TUDCA inhibited the expression of cleaved caspase-3 and reduced the area of terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) staining in the model mice. TUDCA also upregulated anion exchanger 2 (AE2) protein expression, protecting cholangiocytes against excessive toxic BAs. Our results showed that TUDCA aggravated cholestatic liver injury via the FXR/BSEP pathway when bile ducts were obstructed, although TUDCA inhibited apoptotic activity and protected cholangiocytes against excessive toxic BAs.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Jiamin Zou,Jin Zou,Wei Zhong,Qian Liu,Xigen Huang,Yansha Gao,Limin Lu,Shuwu Liu
Layered double hydroxide (LDH) is supposed to be ideal capacitive materials owing to its excellent theoretical specific capacitance. Nevertheless, the inherent defects of LDH such as unstable structure, and agglomerations along with poor conductivity, lead to low rate-capability and poor cycle stability. In this work, poly(3,4-ethylenedioxythiophene) (PEDOT)@nickel–cobalt LDH on carbon cloth (PEDOT@NiCo-LDH/CC) was proposed as a highly capacity electrode material for supercapacitors. Herein, hollow NiCo-LDH nanocage was firstly assembled by NiCo-LDH nanosheets on CC (NiCo-LDH/CC) via an in-situ transformations of ZIF-67, subsequent by coating PEDOT network (PEDOT@NiCo-LDH/CC) on NiCo-LDH/CC via an electrodeposition process. The unique hollow nanocage structure can effectively restrain agglomeration of the LDH nanosheets. Besides, the introduction of PEDOT not only remarkable improves the conductivity, but also protects those hollow LDH nanocages from destruction during the cycling process. Consequently, the PEDOT@NiCo-LDH/CC electrode manifests outstanding capacitance properties of 1508F/g at 1 A/g, excellent rate capability of 71.9 % capacitance retention in 1–20 A/g, and remarkable cycling life of 90.1 % capacity retention at 20 A/g after 10,000 cycles. Moreover, a hybrid asymmetric supercapacitor (ASC) device was assembled by using PEDOT@NiCo-LDH/CC// activated carbon. Such ASC reveals a prominent energy density of 77.1 Wh kg −1 under the power density of 750 W kg −1 . This project provides new inspirations into the rational design of high-performance electrode material in application of energy storage.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Ganchang Lei,Zhangjia Fan,Yufei Hou,Fangyi Liu,Shipping Wang,Lijuan Shen,Yingying Zhan,Lilong Jiang
Construction of metal-free carbon-based materials for efficient sulfur resource recovery in pollutant H 2 S is very critical for both applied environmental catalysis and fundamental material exploration. Herein, we report a template-free hydrothermal method to prepare hierarchical nitrogen-doped mesoporous carbon (HNMCs) materials with abundant nitrogen sites and large BET surface area. The representative HNMC-800 achieves a H 2 S conversion of ∼100% and sulfur selectivity of ∼95% at 150 °C in H 2 S selective oxidation. Moreover, HNMCs catalysts are resistant to sulfur poisoning, displaying good catalytic durability, with no significant loss of sulfur yield in the run of 80 h, outperforming the pure active carbon, g-C 3 N 4 , and commercial Fe 2 O 3 . This work provides the possibility of utilizing hierarchical nitrogen-doped carbon materials as metal-free catalysts for the selective oxidation of H 2 S.
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FUEL
·
2022
·
IF 8.035
K. Radhakrishnan,P. Senthil Kumar,Gayathri Rangasamy,L. Praveen Perumal,S. Sanaulla,S. Nilavendhan,V. Manivasagan,K. Saranya
Plastic production has increased globally, and many of these plastic items are no longer in use. The plastic wastes end up as garbage, disposed of in landfills, or scattered, posing major health and environmental risks. In terms of sustainability, converting plastic trash into fuels or any other better option, individual monomers, is a far more environmentally friendly waste management option than landfill dumping. Nearly 1.3 billion metric tonnes of plastic are produced annually as businesses strive to meet the demands of consumers. Plastic is made through a process called polymerization, in which hydrocarbons are rearranged into new molecules. These hydrocarbons often have a high molecular mass, and they may also contain other chemicals to boost their performance. Plastic is a useful material because, among other things, it is durable, lasts a long time, is inexpensive, and has many other benefits. Because plastic can take decades to degrade if left alone, effective waste plastic disposal should be a top priority for every-one. Yet, growing industrialization and urbanization have contributed to a discernible rise in fuel demand. Finding renewable energy sources to replace fossil fuels is now a critical global priority. Plastics-to-gasoline conversion provides a means to solve both of these problems. By applying intense heat (more than 370 °C) and an oxygen-free environment, pyrolysis thermochemically decomposes organic materials. The byproducts of pyrolysis are carbon black, hydrocarbons, and pyrolysis oil. This review focuses on pyrolysis as it is the most popular and efficient method for turning polymers into fuels in comparison with other methods. This review comprises the knowledge of different types of plastics and their properties. The major discussion was focused on pyrolysis methods for recycling plastics. To have better knowledge competitive recycling method were discussed. The optimization parameter for recycling process, by-products of plastics, advantages and disadvantages of pyrolysis process are discussed to identify the drawbacks and research gaps. The pyrolysis method are potential for addressing waste plastic management and highlights the need for a reliable alternative fuel source.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 3
·1081-1088
·
IF 3.925
Shuchao Jiang,Guoqing Ren,Tie Yu
Formic acid (FA) is regarded as a promising hydrogen storage material, and designing efficient catalysts for the dehydrogenation of high-concentration FA (HCF) is attractive but challenging. Herein, a catalyst comprising PdAu nanoparticles (NPs) anchored on amine-functionalized commercial active carbon (PdAu/AC-NH2) was synthesized and evaluated for the dehydrogenation of HCF without additives under ambient conditions. The Pd3Au2/AC-NH2 catalyst exhibits durable performance and 100% H2 selectivity when the FA concentration is ≤5 M and affords an excellent turnover frequency (TOF) of 3300 h−1 for 5 M FA and 603 h−1 for neat FA at 303 K. Subsequent characterizations reveal that the Au content affects the surface energy and electron property of Pd on PdAu alloy nanocatalysts, which play an indispensable role in the rate committed step of HCOO* adsorption and C–H cleavage. Besides, ultrafine PdAu NPs (2.20 nm) and amine groups synergistically accelerate catalyst activity. This work may pave the way for HCF-based high hydrogen density storage under ambient conditions.
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DYES AND PIGMENTS
·
2023
·
IF 4.5
Shuai Li,Lixia Jia,Linlin Wang,Pengchao Li,Xinlei Fan
Building photonic crystals on the surface of flexible textiles is a common way to obtain structural color fabrics. However, strict requirements for substrate fabric properties, poor stability of photonic crystals, and the lack of new application scenarios have hindered the promotion and use of structural color materials. In this study, we immobilized polystyrene photonic crystals in a fully encapsulated form on the surface of flexible white cotton fabric. These photonic crystals exhibited bright and iridescent structural colors. The fully encapsulated structure imparted high mechanical stability to the photonic crystals. After conducting mechanical and chemical resistance tests, the structural color fabric maintained an intact photonic crystal structure and a significant structural color effect. We also used the prepared structural color fabric to make adhesive tapes, which could easily adhere to surfaces of different materials (e.g., glass, metals, polymers, etc.) and showed good adhesive properties . The findings of our study not only addressed the limitations of the previous methods of preparing structural color fabrics but also provided a new to use these fabrics in practical situations.
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BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Shuang Zhang,Weijie Guan,Haishu Sun,Pan Zhao,Wanqing Wang,Ming Gao,Xiaohong Sun,Qunhui Wang
Microbial electrolysis cell-assisted thermophilic anaerobic digestion (MEC-TAD) is a promising method to improve anaerobic co-digestion efficiency; however, its application is restricted by high energy consumption. To improve the energy use efficiency of MEC-TAD, this study investigated the effect of different intermittent energization strategies on thermophilic co-digestion performance. Results revealed that an 18 h-ON/6h-OFF energization schedule resulted in the fastest electron transfer rate and the highest methane yield (364.3 mL/g VS). Mechanistic analysis revealed that 18 h-ON/6h-OFF resulted in the enrichment of electroactive microorganisms and increased abundance of enzyme-coding genes associated with energy metabolism ( ntp , nuo , atp ), electron transfer ( pilA , nfrA2 , ssuE ), and the hydrogenotrophic methanogenic pathway. Finally, energy balance analysis revealed that 18 h-ON/6h-OFF had the highest net energy benefit (2.52 kJ) and energy conversion efficiency (110.76 %). Therefore, intermittent energization of MEC-TAD using an 18 h-ON/6h-OFF schedule can provide improved performance and more energy savings.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Runze Wang,Guoqing Li,Yuyao Ma,Tengpeng Wang,Bin Chen,Tao Wei,Dehua Dong
Hybrid direct carbon fuel cells (HDCFCs) are promising to achieve high power density, good fuel-electrode contact, and high carbon-fuel conversion efficiency due to increased reaction sites and hybrid routines of carbon utilization. However, the performance of HDCFC is greatly restricted by mass transfer and detrimental carbon deposition . The so-called CO–CO 2 shuttle process, i. e., the coupling of the electrochemical reaction of CO to CO 2 and subsequent discharge of CO 2 towards the C fuel surface for gasification, is the key mass transfer process needed to be optimized. This study demonstrates a novel high-performance HDCFCs anode by integrating C-gasification tandem catalysis in dendritic channel anode support ( t -HDCFCs), which greatly enhances the CO–CO 2 shuttle and mitigates carbon deposition. As a result, the t -HDCFC delivers a comparable or even higher electrochemical performance than the other HDCFCs under the same operation conditions, such as a peak power density of 556 mW cm −2 at 750 °C.
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