INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xiaohan Sun,Xianghao Meng,Qiaoxia Li,YuLin Min,Qunjie Xu
Introducing the second metal is an effective strategy to ameliorate oxygen reduction reaction (ORR) performance of cobalt and nitrogen doped carbon materials (Co-NC). In this study, Sn modulated Co-NC catalysts with enriched active sites (CoSn-NC) were synthesized by using formamide as ligand. Co and Sn bimetals coexist on nitrogen-doped carbon carriers and coordinated with nitrogen to form M − N active centers. Compared with Co-NC, CoSn -NC exhibited outstanding catalytic activity in terms of early initial potential of 1.04 V and positive half-wave potential of 0.89 V. Electrochemical testing and XPS characterization proved that the addition of Sn enriched the active site of Co-NC. More importantly, the electronic structure of Co–N is adjusted to perfect adsorption energy of the intermediate. The study puts forward a new idea and direction for optimizing single metal Co-NC catalyst.
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APPLIED ENERGY
·
2024
·
IF 10.1
Caili Li,Yingjie Li,Yi Fang,Chunxiao Zhang,Yu Ren
CaO-CaCO 3 thermochemical energy storage is a promising technology for solar energy utilization and storage. Alkaline papermaking waste (APW) from paper mills, which is mainly composed of CaCO 3 . Herein, TiO 2 /MnFe 2 O 4 co-modified APW was synthesized. The energy storage capacity of TiO 2 /MnFe 2 O 4 co-modified APW was studied during CaO-CaCO 3 thermochemical energy storage cycles in a duel fixed bed reactor. TiO 2 /MnFe 2 O 4 co-modified APW mainly consists of CaO, MgO, CaTiO 3 , CaMnO 3 , and Ca 2 Fe 2 O 5 . The introductions of TiO 2 and MnFe 2 O 4 significantly improve the cyclic stability and optical absorption property of APW in 30 cycles. The co-modified APW (the mass ratio for CaO:TiO 2 :MnFe 2 O 4 = 100:5:5) possesses high sintering resistance, energy storage, and optical absorption capacities in 30 cycles. The energy storage conversion and capacity of the co-modified APW are 0.72 and 2288.57 kJ/kg after 30 cycles, respectively. The optical absorptance of the co-modified APW reaches 49%, which is 9.25 times as high as that of APW. CaTiO 3 and CaMnO 3 effectively mitigate the sintering of CaO grains. CaMnO 3 and Ca 2 Fe 2 O 5 significantly increase the optical absorptance of APW. The co-modified APW possesses stronger basicity and more oxygen vacancies, which is favourable for the carbonation reaction. Thus, TiO 2 /MnFe 2 O 4 co-modified APW is a good energy storage material.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
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IF 14.7
Xue Jing,Dong Xue,Liu Chunxiao,Li Jiawei,Dai Yizhou,Xue Weiqing,Luo Laihao,Ji Yuan,Zhang Xiao,Li Xu,Jiang Qiu,Zheng Tingting,Xiao Jianping,Xia Chuan
Using renewable electricity to convert CO 2 into CO offers a sustainable route to produce a versatile intermediate to synthesize various chemicals and fuels. For economic CO 2 -to-CO conversion at scale, however, there exists a trade-off between selectivity and activity, necessitating the delicate design of efficient catalysts to hit the sweet spot. We demonstrate here that copper co-alloyed with isolated antimony and palladium atoms can efficiently activate and convert CO 2 molecules into CO. This trimetallic single-atom alloy catalyst (Cu 92 Sb 5 Pd 3 ) achieves an outstanding CO selectivity of 100% (±1.5%) at −402 mA cm −2 and a high activity up to −1 A cm −2 in a neutral electrolyte, surpassing numerous state-of-the-art noble metal catalysts. Moreover, it exhibits long-term stability over 528 h at −100 mA cm −2 with an FE CO above 95%. Operando spectroscopy and theoretical simulation provide explicit evidence for the charge redistribution between Sb/Pd additions and Cu base, demonstrating that Sb and Pd single atoms synergistically shift the electronic structure of Cu for CO production and suppress hydrogen evolution. Additionally, the collaborative interactions enhance the overall stability of the catalyst. These results showcase that Sb/Pd-doped Cu can steadily carry out efficient CO 2 electrolysis under mild conditions, challenging the monopoly of noble metals in large-scale CO 2 -to-CO conversion.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Li Zhang,Jun Cao,Pui Wo Felix Yeung,Hang Jiang,Jianzhong Jiang,Wei Liu,To Ngai
Poly( N -isopropylacrylamide)-based microgels are soft and deformable colloids, which can swell and shrink in response to external stimuli such as temperature or pH, making them suitable for various industries. Herein, poly(styrene- co - N -isopropylacrylamide) microgels with varying softness were synthesized through the doping of different proportions of styrene into their network structure. Rheological tests revealed that the deformability, surface charge, and wettability of microgels were precisely regulated through adjustments to styrene doping levels. As the molar ratio of styrene increased, the range of the linear viscoelastic region regarding stain did not exhibit a consistent change. The microgel suspensions exhibited a pronounced viscous-like behavior, as indicated by their frequency dependence. Additionally, the concentration or volume fraction of microgels significantly influenced the phase distribution in the phase diagram. At lower concentrations, the microgel suspensions typically underwent a colloidal gel-to-liquid-to-glass transition, with the liquid-like regime expanding as the styrene doping level increased. At higher microgel concentrations, the volume phase transition shifted to a direct colloidal gel-to-glass transition, particularly at high styrene levels. This study also revealed a strong correlation between the power-law viscoelastic exponents and the loss tangent during the entire phase transition, offering valuable insights for structure and rheological properties of poly( N -isopropylacrylamide)-based microgels.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yujie Cao,Fei Gao,Yaqian Yuan,Runchi Wang,Shu Xu,Chong Geng
Cesium lead halide perovskite nanocrystals (IPNCs) exhibit excellent optoelectronic properties but are susceptible to degradation in practical environments due to their ionic surface and unstable ligand capping. Here, we propose a post-synthesis surface passivation strategy for CsPbX 3 (X = Br, I) IPNCs by employing combined zinc halide and zinc phenylbutyrate (Zn(PA) 2 ) as surface ligands. ZnBr 2 fills surface halide vacancies on IPNCs, resulting in high photoluminescence efficiency, whereas Zn(PA) 2 stabilizes IPNCs by substituting surface ammonium ligands. Additionally, the −PA capping endows IPNCs with high solubility in polystyrene (PS), enabling the direct fabrication of highly efficient and uniform IPNCs-PS color conversion films through in situ polymerization of the IPNC-styrene solution. The resulting IPNCs-PS films displayed significantly enhanced stability, retaining excellent PL persistence after 1000 h of photoaging. This novel ligand and modification method presents a promising strategy for improving the efficiency and stability of IPNCs, facilitating their potential applications in display backlight and other optoelectronic applications.
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INORGANIC CHEMISTRY
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2025
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IF 4.7
Gongjing Song,Yuxin Shi,Biao Yang,Yifei Yang,Huan Pang
Since the radius of sodium ions is larger compared to that of lithium ions, it is more likely to lead to the structural instability of the electrode material during the embedding and de-embedding process or even trigger the structural collapse. Due to the ability of unsaturated coordination metal–organic framework materials to expose more metal active centers and provide additional sodium-ion binding sites, these materials have great potential as anode materials for sodium-ion batteries. In this study, we obtained unsaturated coordinated Co-terephthalic acid materials via a simple hydrothermal method using an adjusted metal-to-ligand ratio. The rigid structure of the benzene ring and the presence of the –COO– group ensures both the high-strength stability of the material and the increase in the intercalation sites for Na ions. Therefore, the electrode based on this MOF demonstrates a long lifespan and a high capacity of 191 mA h g–1 at 100 mA g–1. The preparation of pure MOF materials by constructing unsaturated sites provides ideas for the application of MOF-based materials in sodium-ion batteries.
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ChemistrySelect
·
2024
·Vol. 9
·期 10
·e202303652
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IF 1.9
Huanhuan Ma,Na Zhang,Xinzhu Wang,Kui Lin,Ping Liu,Fei Tian
Graphical A green one-step hydrothermal method has been successfully used to prepare carbon dots (CDs) by selectively co-doping nitrogen, phosphorus and sulphur elements. For the sensitive detection of iron ions, a fluorescence quencher sensor based on nitrogen- and sulphur-doped carbon dots (red NS-CDs) has been developed, because of the good optical properties and bio-histocompatibility of green NPS-CDs and blue NP-CDs, They are observed to penetrate NCl−H292 cells, fluorescing green and localizing in the cytoplasm. Carbon dots (CDs) with tunable photoluminescence was successfully prepared via selective co-doping of three elements, including nitrogen, phosphorus and sulfur element by green one-step hydrothermal method. Nitrogen-sulfur-doped CDs (red NS-CDs), which emitted red fluorescence under UV excitation, were used to detect iron ions in the linear range 1–50 μM, yielding detectable limits as low as 94 nM. The nitrogen-phosphorus-doped CDs (blue NP-CDs) exhibited blue fluorescence with quantum yields up to 34.5 %. When the concentration is 800 μg/mL, it showed excellent anticancer effect in vitro. The nitrogen-sulfur-phosphorus-doped CDs (green NPS-CDs) emitting green fluorescence showed a low cytotoxicity at a high concentration of 800 μg/mL and were used for intracelluar imaging of NCl−H292 cells. This study demonstrated the photoluminescent characteristics of carbon dots (CDs) and highlighted the ability to modify their peak fluorescence emission wavelengths through the flexible combination of specific reagents under comparable hydrothermal conditions. Additionally, it provided valuable insights into the efficient methodologies for synthesizing CDs suitable for various application scenarios.
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POLYMER
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2024
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IF 4.1
Shengqiang Wang,Zhenbo Peng,Yanhua Huang,Mingquan Zhu,Yayun Liu,Yong Zhang
Phenyl-containing polysiloxanes have better thermal stability, low-temperature flexibility, and room-temperature damping performance than polydimethylsiloxanes. Poly [dimethylsiloxane- co -methyl (phenyl)siloxane] and poly (dimethylsiloxane- co -diphenylsiloxane) were synthesized through a bulk copolymerization of octamethylcyclotetrasiloxane and methylphenylcyclosiloxane mixture or octaphenylcyclotetrasiloxane, and the structure and properties of the copolysiloxanes were comparatively studied. The phenyl content in poly [dimethylsiloxane- co -methyl (phenyl)siloxane] can be as high as 50 mol%. With the increment of the phenyl content, the thermal stability of the copolysiloxanes is dramatically improved as evaluated by thermal gravimetric analysis. At a given phenyl content, poly [dimethylsiloxane- co -methyl (phenyl)siloxane] has higher thermal stability than poly (dimethylsiloxane- co -diphenylsiloxane). The former is more difficult to crystalline at low temperatures and has lower room temperature viscosity than the latter as confirmed by differential scanning calorimetry and rotational rheometer. The copolysiloxanes is mixed with hydrogen-containing polysiloxane and silica, and vulcanized at elevated temperature to get copolysiloxane composites with good damping properties, oil resistance, and low-temperature resistance. This study not only enriches the fundamental academic research on functional polysiloxanes, but also provides useful technical references for practical applications of phenyl silicone rubber.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 5
·1-12
·
IF 5.3
Wei Zhanxiang,Qin Cong,Yang Xuhui,Zhu Linghao,Zhao Xiaoyan,Cao Jianliang,Wang Yan
Abstract The detection of hazardous CO gas is an important research content in the domain of the Internet of Things (IoT). Herein, we introduced a facile metal-organic frameworks (MOFs)-templated strategy to synthesize Cd-doped Co 3 O 4 nanosheets (Cd-Co 3 O 4 NSs) aimed at boosting the CO-sensing performance. The synthesized Cd-Co 3 O 4 NSs feature a multihole nanomeshes structure and a large specific surface area (106.579 m 2 ·g -1 ), which endows the sensing materials with favorable gas diffusion and interaction ability. Furthermore, compared with unadulterated Co 3 O 4 , the 2 mol % Cd-doped Co 3 O 4 (2% Cd-Co 3 O 4 ) sensor exhibits enhanced sensitivity (244%) to 100 ppm CO at 200 °C and a comparatively low experimental limit of detection (0.5 ppm/experimental value). The 2% Cd-Co 3 O 4 NSs show good selectivity, reproducibility, and long-term stability. The improved CO sensitivity signal is probably owing to the stable nanomeshes construction, high surface area, and rich oxygen vacancies caused by cadmium doping. This study presents a facile avenue to promote the sensing performance of p-type metal oxide semiconductors by enhancing the surface activity of Co 3 O 4 combined with morphology control and component regulation. Graphical Abstract
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yujian Rao,Zhenliang Li,Tuo Zhang,Zhehan Wang,Weisheng Li,Xinran Wang,Litao Sun,Yuan Ren,Li Tao
Endowing transition metal dichalcogenides (TMDs) with mesoporous structure can greatly enhance their porosity, accessible specific surface area, and exposed active sites, leading to better performances in applications based on interfacial reactions. Current methods including hard-template (nanocasting) method or thermal-assisted conversion (TAC) still suffer from drawbacks such as cumbersome and environmentally unfriendly process, humidity sensitivity, or ill-defined mesostructures. Herein, the study reports a facile synthesis of ordered mesoporous TMDs/carbon composites by direct organic–inorganic co-assembly in dual solvent (DMF/H 2 O). The amphiphilic block copolymer polyethylene oxide- b -polystyrene (PEO- b -PS) is used as the organic template, and (NH 4 ) 2 MoS 4 or (NH 4 ) 2 WS 4 as the inorganic precursor. After solvent evaporation-induced aggregation assembly and thermal treatments, it results in highly ordered mesoporous MoS 2 , WS 2 , and MoS 2 /WS 2 with highly crystalline framework, high specific surface area (44-91 m 2 g −1 ) and large pore sizes (15–21 nm). Semiconductor gas sensors based on mesoporous TMDs exhibit extraordinary sensing performances toward NO 2 at room temperature, including high sensitivity and ultrahigh selectivity, benefiting from its abundant adsorption sites for gas molecules, fast diffusion rate in well-connected mesopores, and rich edge active sites. This work paves a facile way to develop novel ordered mesoporous TMDs-based semiconductor materials for various applications.
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ENERGY CONVERSION AND MANAGEMENT
·
2025
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IF 10.9
Yujun Wei,Jing Zhang,Zhijian Huang,Qixu Yu,Guanwei Liang,Longshi Rao,Xujiang Chao,Jieling Li,Jianing Wu,Shudong Yu
Interfacial solar steam generation has emerged as a promising approach for alleviating global freshwater shortages. Growing research interest focuses on harnessing sustainable biomass materials like wood to achieve dual-functional systems that produce freshwater while harvesting evaporation-induced energy for electricity generation. In this study, a laser-scribed wood photoabsorber is proposed to enable efficient co-generation of fresh water and electricity. Through brush-coating of cobalt nitrate solution followed by laser direct writing, a composite layer of graphite-Co 3 O 4 nanoparticles was successfully fabricated on the surface of basswood. Both cobalt salt coating and delignification processing were demonstrated to enhance the evaporation and electricity output performance of laser-engineered wood photoabsorbers. The device realized an evaporation rate and an efficiency of 1.71 kg m -2 h −1 and 92.8 % under 1 sun irradiation, respectively. Under ambient conditions without light irradiation, a single device (2 × 2 × 1 cm 3 ) was able to produce an open-circuit voltage of ∼336 mV and a stable short-circuit current of ∼30 μA in pure water. Furthermore, when multiple devices were connected in series, the generated voltage was sufficient to light a light-emitting diode or power an electronic calculator. Through laser-scribing of biomass materials, this study develops a sustainable solar interfacial evaporator capable of simultaneous freshwater production and electricity generation.
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Applied Materials Today
·
2025
·
IF 6.9
Weiqiang Fan,Yongzhen Wang,Rulin Liu,Jing Zou,Weiyi Cai,Jing Cheng,Xiang Yu,Li Xu,Jiaxin Li
The high-value reuse of textile waste is essential for the sustainability of the textile industry; however, it remains a significant challenge, particularly regarding smart materials, despite numerous reports on textile waste recycling methods. 4D printing, as an advanced technological tool, can incorporate smart attributes to enhance the competitiveness of textile waste market. Here, we present a novel strategy of biomimetic 4D reconstruction of textile waste, in which 4D-printed heat-humidity co-responsive fabrics integrate a humidity-responsive substrate derived from textile wastes and heat-responsive components. The humidity-responsive materials consist of regenerated polyurethane substrate from spandex tarpaulin waste and regenerated cellulose fillers from cotton-knitted fabric waste. The heat-responsive component is based on polycaprolactone photo-crosslinked with benzophenone and triallyl isocyanurate. The printed structures can be programmed for preset actuation, and the 4D-printed heat-humidity co-responsive fabrics can be activated in wet, hot, or wet-hot environments, conducive to maintaining heat-humidity comfort of the human body. Our research offers innovative solutions for repurposing textile waste recyclable products, and the 4D smart fabrics would provide strong candidates in personal thermal-moisture management.
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危险品化学品经营许可证（带存储）