Surfaces and Interfaces
·
2023
·
IF 6.2
Jing Xu,Qian Li,Xinyu Liu,Qian Yang
S-type heterojunction is a new type of photocatalytic heterojunction that can efficiently enhance the performance of photocatalytic hydrogen-producing. In this paper, NiAl-LDH/P-MoO 3 composite catalysts were prepared, NiAl-LDH, P-MoO 3 and NiAl-LDH/P-MoO 3 were characterized, tested and analyzed from the aspects of morphology, structure and spectrum. The 5 h hydrogen-producing amount of NiAl-LDH/P-MoO 3 reaches 298.72 μmol, which is 160 times and 16 times that of MoO 3 and NiAl-LDH under the visible light , respectively. The doping of P narrows the band gap of MoO 3 and is more helpful to the electronic transmission. The irregular P-MoO 3 nanorods with a diameter of about 200 nm are attached to 3-4 μml NiAl-LDH nanoflower . The construction of S-type heterojunction changes the electronic transmission pathway of NiAl-LDH/P-MoO 3 while improving the electron-hole pair separation ratio of NiAl-LDH/P-MoO 3 . The strong oxidizing ability of P-MoO 3 and the strong reducing ability of NiAl-LDH are retained. Effective control of electronic transmission path improves the photocatalytic hydrogen-producing activity and stability of NiAl-LDH/P-MoO 3 , which provides a certain theoretical support for the realization of photocatalytic high-efficiency HER by constructing heterojunction.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xintong Yao,Ruiqi Zhang,Minghui Zhu,Dafeng Zhang,Xipeng Pu,Junchang Liu,Hengshuai Li,Peiqing Cai
Some nonstoichiometric semiconductors exhibit excellent near-infrared (NIR) absorption due to their unique localized surface plasmon resonance (LSPR) effect, which is conducive to improving efficiency of light energy conversion to make them promising candidates for efficient photocatalytic hydrogen (H 2 ) evolution. Herein, we constructed a novel 1D/1D MoO 3-x /Mn 0.3 Cd 0.7 S (MO/MCS) S-scheme heterojunction with LSPR and photothermal double effects for boosted full solar spectrum-driven H 2 evolution. The light absorption of MO/MCS was expanded to NIR region through the LSPR effect of MO. Meanwhile, the impressive photothermal effect of MO can increase the surface temperature of the photocatalyst particles under light irradiation, which can further accelerate the photoreaction. According to the experimental and theoretical calculation results, the formation of S-scheme heterojunction was confirmed, which boosted the separation of photo-induced carriers. Consequently, the H 2 evolution performance of judiciously designed MO/MCS composites was significantly enhanced with an optimal H 2 evolution of 2.235 mmol·g −1 ·h −1 , 30.6 times that of pure MCS. This work provides a valuable insight into the development of highly efficient full solar spectrum-driven photocatalysts through utilizing the synergetic effects of LSPR effect, photothermal effect, and S-scheme heterojunction.
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高影响因子
Materials Advances
·
2023
·
IF 5
Teng Ma,Yizhen Zhao,Xiao Liu,Xingyue He,Bin Lei,Xiao-Hang Qiu,Jian-Gong Ma,Peng Cheng
Two new Zn(II) metal–organic frameworks (MOFs), namely [Zn2(bptc)(DMF)2(H2O)]·4H2O (1) and [Zn2(bptc)(azpy)(H2O)2]·2H2O (2) (H4bptc = 3,3′,5,5′-biphenyltetracarboxylic acid, azpy = 4,4′-azopyridine), were synthesized through a solvothermal reaction. The incorporation of the redox-active ancillary ligand azpy endows 2 with electrochemical activity, which enables sensing of S-containing amines (including L-methionine and L-penicillamine) compared to that of 1. The sensor demonstrates exceptional selectivity towards L-methionine due to specific host–guest interactions resulting from hydrogen bonding and size-selective discrimination, leading to an ultralow detection limit of 6.4 × 10−3 nM. Furthermore, the detection of L-penicillamine becomes viable due to the structural and size resemblance with L-methionine. This deduction is substantiated through both computational analysis and empirical investigations, which supplies a new way for the construction and modification of electroactive MOF sensors with superior selectivity and sensitivity.
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Nano Research
·
2023
·
IF 9.9
Dou Tong,Song Dian,Wang Yiping,Zhao Xuhui,Zhang Fazhi,Lei Xiaodong
Electrocatalytic CO 2 reduction reaction (ECO 2 RR) converts CO 2 to high-value chemical products and promotes the carbon cycle. Sulfur (S)-modified copper (Cu) and bismuth (Bi)-based catalysts have been recognized as promising catalysts for ECO 2 RR. Both of them are highly active for selective formate generation, however, their poor stability and severe competing hydrogen evolution reaction (HER) remain challenging. Herein, S-doped Cu coated with Bi (Bi/Cu-S) is developed to improve ECO 2 RR selectivity to formate. Bi/Cu-S/brass mesh (BM) electrode material for ECO 2 RR was prepared by electrodepositing Bi on the surface of Cu-S/BM nanowires obtained from CuS/BM after the electroreduction. The Faradaic efficiency (FE) of the formate reaches the maximum of 94.3% at −0.9 V vs. reversible hydrogen electrode (RHE) with a partial current density as high as −50.7 mAcm −2 and a yield of 30.7 mmolh −1 cm −2 under 0.5 M KHCO 3 electrolyte. Meanwhile, the FE of formate is higher than 90% in the voltage range of −0.8 to −1.0 V vs. RHE. It also shows good stability at −0.9 V vs. RHE with the FE of formate remaining above 93% after a 10 h reaction. Density functional theory (DFT) calculations demonstrate that the Bi/Cu-S structure promotes the adsorption of CO 2 and effectively inhibits HER by enhancing the adsorption of *H to a great extent, improving the selective conversion of CO 2 to formate. This work deepens the understanding of the mechanism of Cu-Bi-based catalysts and S-modified Cu-based catalysts in selective ECO 2 RR to formate, and also provides a new strategy for catalyst design.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xinwei Zhang,Xiaotian Zhang,Rong Wang,Yijia Zhong,Kunting Li,Lei Xu,Huimin Feng
S-scheme heterojunction catalysts have attracted much attention due to their ability to effectively separate photo-generated electrons and holes while optimizing the redox ability of carriers. We have prepared an efficient visible-light catalytic PDPB/Ag–TiO 2 S-scheme heterojunction by in-situ synthesis methods . The catalysts were characterized for their structure, composition , morphology, and photoelectrochemical properties. The hydrogen production rate of PDPB/Ag–TiO 2 -2 was 1473.6 μmol/g/h. The results of SPV analysis showed that the spontaneous interfacial charge transfer from PDPB to Ag–TiO 2 in the contact interface region resulted in the presence of an internal electric field . This enhanced internal electric field effectively drove directional charge migration through the S-scheme mechanism, improving charge separation and utilization. The PDPB/Ag–TiO 2 -2 composites also maintained stable photocatalytic activity after running for four cycles. Overall, this study brings fresh preparation ideas for the conjugated polymer-TiO 2 composites with high photocatalytic efficiency.
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JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Ting Chen,Yuanhong Chen,Chunxian Guo,Zhixiang Xie,Youpeng Li,Wenkui Wu,Yu Gu
Synthesis of nontoxic quantum dots (QDs) with excellent optical properties in aqueous phase to replace organic dyes with photobleaching drawbacks used in bioimaging has become a research priority. Herein, water-soluble Ag-In-Zn-S (AIZS) QDs were prepared by microwave-assisted hydrothermal method at 110 °C for 40 min. The luminescence peak of AIZS QDs was varied from 684.5 nm to 576.2 nm when the Ag/In molar ratio was changed in the range of 1/2–1/10. A clear blue-shift of PL peak from 616.8 nm to 551.5 nm was observed with increasing Zn 2+ element with the Ag/Zn molar ratio in the range of 1/0–1/14, indicating that the increase of Zn 2+ content caused the increase of band gap. The AIZS QDs exhibit the highest photoluminescent quantum yield (PLQY) of 20.67 % with the molar ratio of Ag/In/Zn=1/6/2, and fluorescence lifetime upped to 294.69 ns. Finally, human hepatocellular carcinomas (HepG2) cells and Hela cells were incubated with AIZS QDs solution at different concentrations and were found to have a high survival rate. Furthermore, HepG2 cells emitted bright yellow light when stimulated upon UV excitation, indicating that AIZS QDs can be applied in bioimaging field.
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
Shengye Chen,Jiale Zhou,Kunquan Li,Zhuohan Chen,Xuanjun Li,Xiaojing Su,Xiaojuan Ao,Huali Xie,Lu Chen,Xuting Wu,Wenjian Wu
Recently, the crude oil spill has brought inevitable harm to the global ecological environment. Due to the high-viscosity crude oil, it is wise to take advantage of the photothermal/electrothermal effects of the membrane to separate the crude oil from the water. However, the functional separation membrane always suffers from low photothermal/electrothermal effects and poor stability. Herein, the vinyl polyvinylidene fluoride/mercapto carbon nanotubes@vinyl-terminated polydimethylsiloxane (PVDF-a/CNT-s@PDMS) membrane with fast photothermal/electrothermal effects and organic absorption property was successfully prepared by electrospinning and multi-layer loading method. The prepared PVDF-a/CNT-s@PDMS membrane resisted a variety of liquids and had stable superhydrophobicity (WCA = 156°). Furthermore, the membrane maintained superhydrophobicity even suffer from water and milk under the applied voltage condition. After 100 wear resistance tests, the membrane maintained stable superhydrophobicity and the separation rate remained unchanged. The surface temperature of the membrane rapidly approached to the maximum temperature in 30 s, showing a rapid photothermal/electrothermal effects, and the average separation rate of crude oil was 1185 kg m −2 h −1 ·bar −1 . Meanwhile, the membrane exhibited outstanding efficiency for separate immiscible oil-water mixtures. Importantly, the incorporation of the sulfhydryl group enhanced the special ability of the composite membrane to adsorb organic dyes from oil phase. Therefore, the PVDF-a/CNT-s@PDMS membrane has a wide range of potential application in the domain of oil-water separation.
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Advanced Science
·
2023
·Vol. 10
·期 32
·2302618
·
IF 15.1
Wei Zhou,Changsheng Song,Shuyang Li,Miao Liu,Huiwen He,Shaoyu Yang,Jin Xie,Fei Wang,Fang Fang,Dalin Sun,Jie Zhao,Yun Song
All-solid-state sodium-ion batteries have the potential to improve safety and mitigate the cost bottlenecks of the current lithium-ion battery system if a high-performance electrolyte with cost advantages can be easily synthesized. In this study, a one-step dehydrogenation-assisted strategy to synthesize the novel thio-borohydride (Na-B-H-S) electrolyte is proposed, in which both raw material cost and preparation temperature are significantly reduced. By using sodium borohydride (NaBH 4 ) instead of B as a starting material, B atoms can be readily released from NaBH 4 with much less energy and thus became more available to generate thio-borohydride. The synthesized Na-B-H-S (NaBH 4 /Na-B-S) electrolyte exhibits excellent compatibility with current cathode materials, including FeF 3 (1.0–4.5 V), Na 3 V 2 (PO 4 ) 3 (2.0–4.0 V), and S (1.2–2.8 V). This novel Na-B-H-S electrolyte will take a place in mainstream electrolytes because of its advantages in preparation, cost, and compatibility with various cathode materials.
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高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 45
·2302490
·
IF 27.8
Shen Fei Zhao,Chunjie Li,Zixiang Cui,Jing Zhang,Weihua Hu,Ruguang Ma,Chang Ming Li
Room-temperature sodium–sulfur batteries are potential candidate for sustainable large-scale energy storage systems due to their high energy density and low cost. However, the shuttling effect of high-order polysulfides (Na 2 S n , 4 < n ≤ 8) usually leads to rapid capacity fading, while the reaction kinetics of low-order polysulfides (Na 2 S n , 1 ≤ n ≤ 4) are slow. In this work, microporous-mesoporous carbon derived from mangosteen peels is reported as cathode materials for RT Na–S batteries. The designed micro-mesoporous structure not only effectively suppresses the shuttling effect of sodium polysulfides (NaPS), but also has high electrical conductivity and porosity, which facilitates electron/ion diffusion. Oxygen functional groups on the surface provide high catalytic activity for efficient low-order NaPS conversion. The obtained Na–S battery exhibits high reversible capacity with excellent long-term cycle performance (526.1 mAh g −1 at 4 A g −1 after 1000 cycles) and outstanding rate performance (676.59 mAh g −1 at 16 A g −1 ). This work demonstrates a novel activation strategy of biomass-derived carbons for high-performance Na–S batteries.
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ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Zhuoyue Wang,Ji Li,Wei Song,Jingxin Yang,Wenyi Dong,Xiaolei Zhang
Recently, it has been reported that chlorine dioxide (ClO 2 ) and (bi)sulfite/ClO 2 showed excellent performance in micropollutant removal from water; however, the degradation mechanisms and application boundaries of the two system have not been identified. In this study, bisphenol A (BPA) was chosen as the target contaminant to give multiple comparisons of ClO 2 and S(IV)/ClO 2 process regarding the degradation performance of contaminant, generation of reactive species, transformation of products and toxicity variation. Both ClO 2 and S(IV)/ClO 2 can degrade BPA within 3 min. The BPA degradation mechanism was mainly based on direct oxidation in ClO 2 process while it was attributed to radicals (especially SO 4 · - ) generation in S(IV)/ClO 2 process. Meanwhile, the effect of pH and coexisting substances (Cl − , Br − , HCO 3 − and HA) were evaluated. It was found that ClO 2 preferred the neutral and alkaline condition and S(IV)/ClO 2 preferred the acidic condition for BPA degradation. An unexpected speed-up of BPA degradation was observed in ClO 2 process in the presence of Br − , HCO 3 − and HA . In addition, the intermediate products in BPA degradation were identified. Three exclusive products were found in ClO 2 process, in which p-benzoquinone was considered to be the reason of the acute toxicity increase in ClO 2 process.
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高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Qiqi Huang,Fuxiao Zhu,Feiyan Xiao,Gongliang Zhang,Hongman Hou,Jingran Bi,Shuang Yan,Hongshun Hao
In recent years, using external mechanical energy to solve environmental pollution problems has gradually become a promising strategy, such as piezoelectric catalysis and piezoelectric photocatalysis . In this paper, a series of HKUST-1/g-C 3 N 4 composite materials were successfully synthesized by the combination of g-C 3 N 4 with S-vacancy and porous HKUST-1 semiconductor. Under visible light irradiation and ultrasonic action, the catalytic activity of HKUST-1/g-C 3 N 4 on RhB degradation was investigated. When the mass ratio of HKUST-1 to g-C 3 N 4 is 1:0.3 during the process of piezoelectric photocatalysis, the as-prepared HKUST-1/g-C 3 N 4 composite had the best RhB degradation performance up to 94.42%, which is about 2.83 times that of visible light and 3.56 times that of ultrasonic waves. According to the result of the trapping experiment, the process of piezo-photocatalytic reaction could produce the number of reactive oxygen species (ROS), and the hydroxyl radical (•OH) was crucial in the breakdown of pollutants.
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ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Peibo Gao,Shixing Xu,Zhangwei Chen,Xi Huang,Zhihao Bao,Changshi Lao,Guangming Wu,Yongfeng Mei
Carbon hosts have been utilized to obtain composite cathodes with high sulfur loadings for Li–S batteries. However, the complicated synthesis process may hinder their practical applications. Their mechanical and electrochemical properties shall be further improved. Herein, a facile scalable dip-coating process is developed to synthesize a flexible composite cathode with a high sulfur loading. Via the process, a hybrid composed of carbon nanotubes, carbon black, sulfur, and titania nanoparticles is successfully conformally coated on the carbonized textile (c-textile). The formed flexible c-textile@S/TiO2 cathodes with sulfur loadings of 1.5 and 3.0 mg cm–2 can deliver reversible discharge capacities of 860 and 659 mA h g–1 at 2 C, respectively. For the latter one, it can retain 94% of the initial capacity after 400 cycles with a high Coulombic efficiency (∼96%). When its sulfur loading is further increased to 7.0 mg cm–2, its areal capacity reaches 5.2 mA h cm–2. Such excellent performance is ascribed to the synergy effect of the three-dimension conductive hierarchical pore structure and TiO2 additive. They can physically and chemically entrap the soluble polysulfides in the composite cathode. The as-synthesized free-standing composite electrode is of low cost and a high areal capacity, making it suitable for flexible energy storage applications based on Li–S batteries.
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