JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 6
·1-13
·
IF 2.8
Li Zezhong,Xu Jing,Ma Yongqiang,Ma Yue,Liu Zhenlu
Photocatalytic hydrogen production is one of the effective ways of global energy conservation and emission reduction. Herein, we report the successful embedding of flower ball MoS 2 into Sm 2 WO 6 using the hydrothermal method, and p-n heterojunction is obtained successfully. Due to the narrow band gap of MoS 2 , the Sm 2 WO 6 / MoS 2 composite photocatalyst effectively improves the photogenerated carrier separation. The better redox capacity of Sm 2 WO 6 itself also promotes the reduction capacity of Sm 2 WO 6 /MoS 2 . The petals on MoS 2 are closely bound to Sm 2 WO 6 , which enhances the electron transport efficiency and is one of the main factors for improving photocatalytic hydrogen evolution (HER). To explore the performance of Sm 2 WO 6 / MoS 2 by various means of representation. And the HER performance of Sm 2 WO 6 / MoS 2 is evaluated using eosin Y (EY) as sensitizer and TEOA as sacrifice agent. Compared with pure Sm 2 WO 6 , Sm 2 WO 6 / MoS 2 has improved HER performance, and its optimal activity is 142.7 µmol, which is nearly 140 times that of pure Sm 2 WO 6 . This study demonstrates a novel morphology design strategy for composite photocatalysts to promote efficient photocatalytic hydrogen production.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2020
·Vol. 25
·期 2
·683-688
·
IF 2.646
Yu Qizhi,Kong Xiangfa,Chen Chaoshu,Kang Caiyan,Meng Mianwu,Huang Siyu
An Ag nanoparticles (NPs) layer was synthesized on Ag sheet by alloying/electrochemical dealloying method: X-ray diffraction confirmed that the new Ag phase appeared after removing Ga from Ag-Ga alloy, and scanning electron microscopy examination showed that the prepared Ag layer had a NPS structure. The fine microstructure of silver resulted in significant SERS enhancement effect, while the NPs layer was used as the SERS substrate: when the prepared NPs layer was used as a SERS substrate to detect p-phenylenediamine (PPD), it exhibited a strong SERS peak at 1590 cm −1 . The result revealed that the intensity of SERS peaks was linear to the logarithm of PPD concentration in the range from 10 −16 mol L −1 to 10 −12 mol L −1 and the detection limit was 1.0 × 10 −17 mol L −1 .
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Advanced Materials Interfaces
·
2019
·Vol. 6
·期 14
·1900592
·
IF 4.713
Ya-Nan Sun,Ming-Li Zhang,Li Zhao,Zhu-Yin Sui,Zhen-Yu Sun,Bao-Hang Han
Oxygen reduction reaction (ORR) is the critical reaction in metal–air batteries and fuel cells. This reaction suffers from sluggish kinetics and use of Pt-based catalysts that are prohibitively expensive and in shortage of resource. Therefore, an alternative advanced metal-free catalyst for ORR is highly desired. Herein, a N, P dual-doped porous carbon (NPPC) with large surface area is obtained through the CO 2 activation of a novel N, P-doped aerogel (NPA). Ascribed to the CO 2 activation of NPA, NPPC possesses a large Brunauer–Emmett–Teller specific surface area (2850 m 2 g −1 ) and N, P dual doping. CO 2 activation as an environmentally friendly method with no corrosion can not only produce abundant micropores and mesopores in NPPC, but also provide a positive influence for the transformation of N species from pyrrolic N to pyridinic and graphitic N, which can promote the ORR activities. Therefore, compared with carbonized NPA, NPPC exhibits a higher ORR activity, including a larger transfer electron number (3.95 at 0.2 V vs reversible hydrogen electrode). Additionally, NPPC possesses a much better long-term stability compared with commercial 20 wt% Pt/C. This work gives an inspiration on the new strategy for preparing the future catalyst for ORR.
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WATER RESEARCH
·
2022
·
IF 13.4
Chaoxia Zhao,Li Xue,Hongxiao Shi,Wenqi Chen,Yu Zhong,Yi Zhang,Yanping Zhou,Kama Huang
Different physicochemical properties between Cr(VI) and phenolic compounds pose serious challenges for the effective treatment of co-contamination. This study developed an electrodeless high-flow microwave atmospheric plasma jet for the single-step simultaneous degradation of p -nitrophenol (PNP) and reduction of Cr(VI). Following a 15 min treatment with microwave atmospheric pressure plasma, the removal efficiency of Cr(VI) and PNP reached 97.5% and 93.6%, respectively, whereas that of total organic carbon reached 30.2%. Adding PNP to the solution significantly improved Cr(VI) reduction, whereas PNP degradation increased slightly with Cr(VI). The results indicate that the PNP intermediates significantly affected Cr(VI) reduction. Additionally, long-lived H 2 O 2 and short-lived · H aided the reduction of Cr(VI) during plasma treatment. The addition of hydroxyl scavengers during treatment implied that · O H was largely responsible for PNP oxidation. High-performance liquid chromatography–mass spectroscopy (HPLC-MS) revealed that PNP intermediates, including p -nitrocatechol and 5-nitrobenzene-1,2,3-triol, function as Cr(VI) reductants. On the basis of the examined intermediate products, the potential PNP degradation pathway was investigated. The factors that could influence simultaneous dehgradation and reduction, including solution pH, gas velocity, and distance between the plasma outlet and the water surface were researched. Low pH supports Cr(VI) reduction, and the promotion of PNP for Cr(VI) reduction applies to all pH values. The degradation of PNP is insensitive to pH values with or without Cr(VI). The optimal gas velocity for PNP degradation and Cr(VI) reduction was revealed to be 6 L/min. The simultaneous removal of PNP and Cr(VI) benefits from a shorter distance between the plasma outlet and the water's surface.
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Shiyang Fu,Yuqing Shi,Guowei Yu,Xiao Liang,Nan Gao,Jing Zhang
Co 3 O 4 /Fe 2 O 3 p–n heterojunctions were prepared hydrothermally. • CF-5 shows a 5.6-fold response at a lower optimal temperature. • DFT reveals charge redistribution enhancing n-butanol adsorption. To selectively detect volatile organic compounds at low operating temperatures are highly desirable for industrial safety and environmental monitoring. Herein, we report the high-performance n-butanol gas sensors via interfacial engineering of Co 3 O 4 /Fe 2 O 3 p–n heterojunction composites. Hierarchical architectures composed of Fe 2 O 3 nanoparticles uniformly anchored on Co 3 O 4 nanorods were synthesized through a facile hydrothermal calcination strategy. Among the prepared samples, the optimized composite delivers a markedly enhanced sensing response of 23.08 toward 100 ppm n-butanol, representing a 5.6-fold improvement compared with pristine Co 3 O 4 , and simultaneously reducing the optimal operating temperature to 110°C. The mechanism analyses reveal pronounced interfacial charge transfer from Fe 2 O 3 to Co 3 O 4 , which induces band bending and built-in potential barriers that sensitively regulate carrier transport. The formation of heterointerfaces also significantly enriches chemisorbed oxygen species, thereby accelerating surface oxidation reactions with n-butanol molecules. As a result, the sensor exhibits outstanding selectivity against common interfering gases, fast response/recovery dynamics (42/36 s). Density functional theory calculations further elucidate that the heterojunction facilitates stronger adsorption of n-butanol and its oxidation intermediates, enhanced charge transfer, and favorable electronic-state redistribution near the Fermi level. This work highlights interfacial electronic engineering as an effective strategy for developing energy-efficient and highly reliable metal-oxide gas sensors. Download: Download high-res image (237KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
·
2026
·Vol. 126
·期 13
·e70254
·
IF 2.7
Jiyang Zhang,Xu Zhang,Jiapeng Zhu,Chaoyang Huang,Bingchen Zhang,Wenxue Song,Jihong Liu,Guixiao Jia,Dawei Lan
Heteroatom doping is an effective approach to enhance sodium storage capacities of carbon materials. In this study, we synthesized P-doped porous carbon (C–P) materials with defects derived from lignite humic residues. The effects of introduced P, O, vacancy defects and combinations of these defects on Na storage capacities have been investigated using a combination method of density functional theory (DFT) calculations and experiments. Binding energies, geometrical and electronic structures of Na on graphene surfaces with various defects are calculated. The results indicate that the introduction of defects, particularly P-dopings, enhances the interaction between graphene and Na, improving the sodium storage capacity of the graphene. This is attributed to increased density of states of the modified graphenes at the Fermi level and strong covalent interaction between Na and P. These results are supported by experimental data, highlighting the role of the P-doping in improving sodium storage. Experimental studies demonstrate that P-doped porous carbon (C–P) with possible common defects such as O-adsorbed, P-doped, vacancy defects and combinations of these defects exhibits a reversible specific capacity of 179.5 mAh g −1 with over 90% capacity retention after 150 cycles at a current density of 0.1 A g −1 , and maintain a reversible specific capacity of 147.4 mAh g −1 after 1500 cycles at 1.0 A g −1 , superior to other analogous materials.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Zhibo Zhou,Yunqing Gu,Yun Ren,Zhou Li,Denghao Wu,Zhenxing Wu,Chengqi Mou
P(NIPAM-AM)/CS/TA-Fe 3+ hydrogel integrates NIR actuation and self-sensing. • Optimized network enables a 4.7 s fast response and 104° maximum bending. • TA-Fe 3+ coordination offers a high photothermal conversion efficiency of 27.76%. • Linear resistance-strain mapping predicts bending angles with ≤ 2.67% error. • The dual-function material allows real-time feedback for closed-loop control. Conventional hydrogel actuators often suffer from single functionality and a lack of real-time state feedback, restricting their potential in closed-loop control and intelligent applications. To address this, we designed a synergistically crosslinked composite hydrogel based on poly(N-isopropylacrylamide-co-acrylamide) (P(NIPAM-AM)), tannic acid-iron ion (TA-Fe 3+ ) complexes, and chitosan (CS). This hydrogel integrates near‑infrared (NIR)‑driven actuation with resistive self‑sensing and exhibits excellent shape programming and multidirectional actuation capabilities. By systematically optimizing the composition, the hydrogel with 0.1 mL of CS solution achieves a rapid response time of only 4.7 s and a maximum bending angle of 104°. Furthermore, at an Fe 3+ content of 120 mg, the hydrogel demonstrates a high photothermal conversion efficiency of 27.76% and an initial conductivity of 2.549 (Ω·m) −1 . It exhibits excellent self-sensing characteristics, with a bending gauge factor of 0.019 and high angle-sensing accuracy with an error of ≤ 2.67%. This work provides a simple and efficient strategy for developing intelligent soft materials that integrate actuation and sensing. Download: Download high-res image (220KB) Download: Download full-size image
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RARE METALS
·
2026
·Vol. 45
·期 5
·e70300
·
IF 12.1
Hui Liu,Hongli Jia,Xiaojin Yan,Rouling Chen,Yingying Wang,Kun Chen
en This link goes to a English section zh This link goes to a Chinese section Thermo-responsive hydrogels based on poly(N-isopropylacrylamide) (PNIPAM) are promising candidates for soft actuation, yet their practical applications are often constrained by sluggish thermo-responsive kinetics and insufficient mechanical robustness. Herein, phosphotungstic acid (PTA), a tungsten-containing polyoxometalate, was incorporated to regulate the phase transition behavior and modulate a PNIPAM/P(AA- co -AM) bilayer hydrogel, in which the thermo-responsive PNIPAM layer serves as the actuator whereas the non-thermo-responsive P(AA- co -AM) layer provides mechanical support. By increasing the PTA content up to 4 wt%, the thermally induced deformation time of the PNIPAM layer was prolonged from 30 to 120 s, whereas the recovery time at low temperature was shortened from 120 to 60 min, thereby enabling programmable thermo-responsive kinetics. The thermal transition of the PTA-PNIPAM layer was effectively regulated by PTA, with the lower critical solution temperature (LCST) gradually increasing and tunable up to 42°C, accompanied by an improved thermal stability manifested by reduced mass loss at 150°C. Mechanical characterization demonstrated that the P(AA- co -AM) layer modulated the tensile properties of hydrogel networks, and the bilayer configuration significantly outperformed the pristine PNIPAM hydrogel. Benefiting from the synergistic effects of kinetic regulation and mechanical modulation, the bilayer hydrogel further exhibited multi-substrate adhesion and reversible deformation, enabling an underwater gripping demonstration. This work highlights a polyoxometalate-enabled strategy for simultaneously controlling thermo-responsive kinetics and toughening PNIPAM-based hydrogels, thereby advancing functional soft materials for actuation-related applications. 摘要 en This link goes to a English section zh This link goes to a Chinese section 聚(N-异丙基丙烯酰胺)(PNIPAM)的温敏水凝胶是软体动力领域的有力候选材料,但其迟缓的热响应动力学和有限的机械鲁棒性往往限制了其实际应用。在此,我们在PNIPAM/P(AA- co -AM)双层水凝胶中引入了磷钨酸(PTA),以调控其相变行为并增强材料性能。在该双层结构中,温敏性PNIPAM层作为动力层,而非温敏性P(AA- co -AM)层则提供机械支撑。通过将PTA的含量提高至4 wt%,PNIPAM层的热诱导变形时间从30秒延长至120秒,而在低温下的恢复时间则从120分钟缩短至60分钟,从而实现了可编程的热响应动力学。PTA有效调控了PTA-PNIPAM层的热转变行为,使其低临界溶解温度(LCST)逐渐升高且最高可调至42°C。同时,材料的热稳定性也得到提升,150°C时的质量损失明显减少。力学表征表明,P(AA- co -AM)层调节了水凝胶网络的拉伸性能,且该双层结构的性能显著优于原始PNIPAM水凝胶。得益于动力学调控与机械增韧的协同效应,该双层水凝胶进一步展现出多基底黏附性和可逆变形能力,并成功实现了水下抓取演示。本工作提出了一种基于多金属氧酸盐的水凝胶改性策略,可同时控制PNIPAM基水凝胶的热响应动力学并增强其韧性,从而推动了功能性软材料在相关应用中的发展。
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Chemical Science
·
2026
·
IF 8.1
Jiahui Luo,Baoxin Wu,Kejun Yan,Yongbiao Mu,Qing Zhang,Huanxiu Zou,Zhiqing Tang,Guobin Zhang,Wanwisa Limphirat,Wenjia Li,Lin Zeng
Industrial anion exchange membrane water electrolysis (AEMWE) still lacks earth-abundant oxygen evolution reaction (OER) catalysts that simultaneously exhibit high intrinsic activity and long-term durability. This limitation mainly originates from the conventional adsorbate evolution mechanism (AEM), which is restricted by the linear scaling relationship between *OOH and *O intermediates. Herein, we propose a rapid diffusion strategy based on molten-salt-assisted approach to synthesize P/FeOx. The entire synthesis completes within minutes via high-temperature solid-state interdiffusion, enabling single-batch production at the kilogram scale with exceptional time and energy efficiency. Phosphorus doping successfully narrows the band gap between Fe 3d and O 2p, thus enhancing electronic conductivity. It also promotes the formation of Ov and induces a mechanistic transition from the AEM to the lattice-oxygen oxidation mechanism (LOM) pathway, simultaneously reducing the activation barrier for the *OH → *O step. The optimized catalyst achieves an overpotential of 256 mV at 100 mA cm−2 and maintains stable operation for over 2000 h at 100 mA cm−2 without noticeable degradation. When integrated into an AEMWE device, the membrane-electrode assembly requires merely 1.78 V to deliver 500 mA cm−2 and operates stably for 1000 h. In conclusion, this study presents a rational synthesis approach and practical design principles for engineering high-performance OER electrocatalysts tailored to industrial water electrolysis.
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高影响因子
Journal of Hazardous Materials Advances
·
2026
·
IF 9.1
Yongjiong Ni,Keyi Xu,Liqin Zhong,Suleiman Shemsa Khalfan,Kejin Zhou,Jing Deng,Xiaoyan Ma,Stefanos Giannakis,Daniel L. Gallagher,Andrea M. Dietrich
The widespread use of additives introduces emerging contaminants, including acesulfame (ACE) and p-arsanilic acid (p-ASA), into agricultural systems, where their co-occurrence may affect crop development. This study investigated the individual and combined effects of ACE and p-ASA on rice during early growth. Rice seeds were exposed under controlled conditions to ACE (0.5–50 μM) and p-ASA (10 μM), either individually or in combination. Germination was assessed after 4 and 7 d, whereas biomass and physiological and biochemical responses, including α-amylase, β-amylase, soluble protein, superoxide dismutase (SOD), peroxidase (POD), and malondialdehyde (MDA), were evaluated after 14 d. After 4 d, ACE alone caused small, non-significant reductions in germination, whereas only the highest combined exposure (50 μM ACE + 10 μM p-ASA) significantly reduced germination relative to the control. After 7 d, germination rates ranged from 97.22 ± 3.90% to 99.44 ± 1.36%, with no significant differences among treatments, indicating that the initial co-exposure effect was transient. In contrast, seedling biomass was inhibited by up to 22.05% after 14 d, with inhibition increasing with ACE concentration. ACE alone generally increased enzyme activities and MDA levels while reducing soluble protein content. Co-exposure to p-ASA reduced α-amylase, β-amylase, and POD activities below control levels while increasing SOD activity and MDA accumulation. A higher-than-additive increase in MDA was observed only at the highest combined exposure, indicating enhanced lipid peroxidation, whereas lower ACE concentrations produced additive effects. Overall, ACE and p-ASA had limited and transient effects on germination but impaired seedling growth and altered enzymatic and oxidative-stress responses. These findings demonstrate that the effects of contaminant mixtures are strongly concentration dependent and cannot be inferred solely from the responses to the individual compounds.
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Catalysts
·
2026
·Vol. 16
·期 8
·707
·
IF 4.5
Zibin Hai,Jingwei Han,Mengyao Xue,Yunhua Zhang
In semiconductor photocatalysis, the strong redox ability of a wide band gap and the broad light absorption range of a narrow band gap are a pair of irreconcilable trade-offs. By combining semiconductors with different band gap widths and band edge positions, both of these advantages can be achieved simultaneously. A ternary Cu2O-SnO2/g-C3N4(CuSnCN) composite photocatalyst was prepared through the hydrothermal and calcination method. Structural analyses confirm the successful integration of truncated octahedral Cu2O, spherical SnO2, and layered g-C3N4, which extends the visible-light response to 650 nm. The optimized system achieves a remarkable 96.58% degradation of methyl orange (80 min, 0.2 g/L catalyst, pH = 3) through dual heterojunction synergies: p–n junctions (Cu2O/g-C3N4and SnO2/g-C3N4) and Z-scheme charge transfer (SnO2/Cu2O), with •O2−/h+identified as the dominant reactive species. This work establishes a tunable heterojunction platform for the elimination of multiple pollutants through engineered radical-generation pathways.
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Limin Chen,Jinfang Hu,Yulai He,Juncang Wang,Ye Hong,Wenjin Chen
The advancement of cost-effective, non-metal-doped catalysts is essential for the effective degradation of aquatic contaminants. In this study, hollow carbon spheres (HCS) were synthesized from glucose using the soft stencil method. These HCS were subsequently co-doped with nitrogen and phosphorus using ammonium dihydrogen phosphate ((NH 4 ) 2 HPO 4 ) as the doping source, resulting in N, P co-doped hollow carbon spheres (NPHCS). These NPHCS served as a mediator for peroxymonosulfate (PMS) activation, applied in the degradation of tetracycline hydrochloride (TC). The unique architecture of NPHCS, characterized by hollow 3D cavities and mesoporous channels, established a spatially confined environment that markedly increased total surface exposure and number of reactive centers. This structure facilitated rapid adsorption and activation of PMS on the catalyst surface, generating reactive oxygen species more efficiently compared to unrestricted nitrogen and phosphorus-doped carbon nanosheets (NPCN) and carbon black (NPCB). The confined nano-environment of the hollow cavities shortened mass transfer pathways, substantially improving the contact and catalytic efficiency between active oxygen species and pollutants. Consequently, over 90% of TC was degraded within 20 min. This research offers a novel insight into the design of low-cost, N, P co-doped catalytic nanoreactors for improving the catalytic efficiency in non-metal-based systems.
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