Journal of Energy Storage
·
2023
·
IF 9.4
Sijia Hao,Yongjin Zou,Cuili Xiang,Lixian Sun,Fen Xu,Zhicong Hu
The single function and leakage of organic phase change materials (OPCMs) used alone considerably limit the scope of their large-scale applications. An efficient method of addressing this issue is by adding functional fillers and porous scaffolds to OPCMs. In this study, a novel CuS-coated carbonized melamine foam (CMF)/reduced graphene oxide (rGO) framework (CMF/rGO/CuS) was developed for the preparation of stable multifunctional OPCMs. The functional materials rGO and CuS were used as reinforcing materials, and CMF was used as a supporting material. Paraffin wax (PW), a thermal storage substance, was encapsulated in the CMF/rGO/CuS framework by vacuum-assisted impregnation to obtain a PW@CMF/rGO/CuS composite with excellent comprehensive properties. When the concentration of the conductive filler CuS was 2.0 wt%, the conductivity of the PW@CMF/rGO/CuS 2.0was 73.7 % more than that of pure PW, and its photothermal conversion efficiency exceeded 90 %. Meanwhile, CMF/rGO/CuS endowed the composite with a thermal conductivity of 0.2525 W m −1 K −1 , which was 33.6 % higher than that of pure PW. Finally, PW@CMF/rGO/CuS demonstrated high thermal cycling and thermal cycling stability with good application prospects in various fields.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Zhongpan Zhang,Xiaoqiang Fan,Xiaoliang Ma,Minhao Zhu
To unify the lubrication characteristics of carbon spheres (CS) with high load-bearing capacity and molybdenum disulfide (MoS 2 ) with exceptional low-shear friction performance, CS wrapped with MoS 2 (C@MoS 2 ) were accomplished via an efficient and facile hydrothermal method based on the self-assembly principle. Then, 0.5 wt% C@MoS 2 particles were dispersed into Poly Alpha Olefin 40 (PAO 40) for enhancing the anti-friction/wear abilities. Subsequently, 0.5 wt% of C@MoS 2 particles were dispersed into Poly Alpha Olefin 40 (PAO 40) to enhance its anti-friction and wear-resistant capabilities. The excellent tribological properties of C@MoS 2 particles were attributed to the synergistic lubrication between bearing and filling effect of CS as well as the superior antifriction capacity of MoS 2 shell. Furthermore, the synergetic lubrication mechanism of C@MoS 2 may be segmented into different stages: I. the shell crushing stage, corresponding to the rolling bearing effect of C@MoS 2 particles at the friction interface; II. the core/shell separation stage, corresponding to the rolling bearing effect and self-repair effect of C@MoS 2 particles; III. the core/shell recombination stage, corresponding to the construction and reinforcement of protective film and the great improvement of anti-friction/wear abilities performance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qingqing Li,Yingzhang Shi,Zhiwen Wang,Cheng Liu,Jinhong Bi,Jimmy C. Yu,Ling Wu
A series of dehydrated MoS 2 /UiO-66(SH) 2 (MS/UiS) composites has been prepared as photocatalysts for N 2 fixation. Typically, 10% MS/UiS exhibits the best performance with an NH 4 + yield rate of 54.08 μmol∙g −1 ∙h −1 . 15 N isotope test confirmed that the sample 10% MS/UiS was most effective for reducing N 2 to ammonia. Such enhanced activity was due to the presence of abundant unsaturated Zr and Mo sites which would synergistically promote the adsorption and activation of N 2 . The photogenerated electrons would transfer to the unsaturated Zr-O clusters while part of photogenerated electrons at the interface migrate to MS via Mo VI -O interactions between MS and UiS. These two electron transfer pathways effectively promote the separation of photogenerated carriers. The activated N 2 is reduced to ammonia by the synergistic effect of protonated hydrogen and photogenerated electrons. Finally, a possible N 2 fixation mechanism is proposed which emphasizes the significant roles of nitrogen activation and interface interaction in composites photocatalyst for improving photocatalytic performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Fu-Fei Pu,Yu-Xuan Xiao,Xiong Yang,Fei Yu,Lei Xia,Jiang-Bo Chen,Lu Wu,Jing-Jing Xie,Wen-Ying Zhao,Yu Liu,Li-Ying Wang,Jie Ying,Mei-Jing Liao,Kenneth I. Ozoemena,Ge Tian,Fazhou Wang,Xiao-Yu Yang
Maximization of the utilization of electronic energy and enhancement of mass transfer are important goals in designing high-performance electrocatalytic PtNi nanoalloys. However, realization of such a combination of these properties into Pt based electrocatalysts remains a significant challenge. In an effort targeted at attaining these goals, we prepared several semiconductors (BiVO 4 , CdS and TiO 2 ) modified, gourd-shaped hollow PtNi nanocomposites . We observed that among members of this group, BiVO 4 modified PtNi (denoted as BiVO 4 /PtNi) displays optimal directional electron and mass transfer, which are attributed to the closeness of the work functions of BiVO 4 and PtNi, and a unique gourd-shaped, hollow structure. Moreover, BiVO 4 /PtNi displays remarkable electrocatalytic performance in the hydrogen evolution reaction, in terms of low overpotential of 23 mV to drive the current density of 10 mA cm −2 and a low Tafel slope of 40 mV dec −1 in alkaline natural seawater. Furthermore, this nanocomposite exhibits high stability during a 20-h durability test that greatly exceeds that of commercial Pt/C. The results of this investigation show that new approaches exist for designing novel nanomaterials that have superior performance as electrocatalysts or in other practical applications.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yiting Liao,Lanzhen Peng,Xiaosong Zhou,Jin Luo,Limei Xu,Xiaomei Ning,Xiaoqin Zhou,Xunfu Zhou,Yueping Fang
Two major challenges in photocatalysis are the separation and utilization of photogenerated charge carriers that have limited their wider applications. To address these issues, significant studies have been devoted to the surface modification of photocatalysts. Herein, CdS nanorods were surface-modified by an ion-conducting LiTi 2 (PO 4 ) 3 (LTP) shell. This modification could accelerate the rapid separation and efficient utilization of photoinduced charge carriers. Therefore, CdS@LTP composite photocatalyst displayed a photocatalytic H 2 evolution rate of 26.01 mmol g −1 h −1 without any addition of cocatalysts in a Na 2 S/Na 2 SO 3 solution, which was over 6-fold compared to CdS, and showed improved stability. Furthermore, this shell can prevent the reverse reactions between H 2 and O 2 during photocatalytic water splitting. With the photo-deposition of Pt cocatalysts, CdS@LTP-Pt can achieve efficient overall water splitting with the highest H 2 generation rate (351 μmol g −1 h −1 ), which is 3.25 times higher than that of CdS-Pt. This study broadens the application of ionic conductor materials and provides a new way for the design of advanced photocatalysts for solar energy conversion.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Huijie Wang,Yang Wan,Binrong Li,Jian Ye,Jiahao Gan,Jiejing Liu,Xin Liu,Xianghai Song,Weiqiang Zhou,Xin Li,Pengwei Huo
The charge carrier separation efficiency and the adsorption capacity of the photocatalyst usually affect the degradation rate of antibiotics. Herein, Cerium-doped leaf-like CdS (Ce-CdS) modified with ultrathin N-doped rGO (N-rGO) composites were successfully constructed (Ce-CdS/N-rGO) to investigate the removal efficiency of tetracycline (TC). X-ray photoelectron spectroscopy (XPS) and photoelectrochemical results revealed that Ce ions doped in CdS acting as the electron capture sites facilitated the interfacial charge transfer. Theoretical calculation (DFT) results indicated that the interfacial effect between Ce-CdS and ultrathin N-rGO promoted the transfer of photogenerated electrons under the synergistic effect between the doping and interface modification strategy. The optimized Ce5-CdS/N-rGO20 composites had the maximum TC removal capability (94.5%) and maintained a stable cycling performance. In addition, the adsorption-driven photocatalytic degradation pathway of TC was studied through mass spectrometry (MS) and in-situ Fourier transform infrared spectroscopy ( in-situ FTIR). This study will provide an effective strategy for the construction of efficient photocatalytic composites for wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 45
·455402
·
IF 3.5
Cynthia Mulanga Makabu,Shengnan Tian,Marc Kalamb Kalau,Zizhen Gong,Weixing Niu,Changcheng Wu,Jingde Li
The development of low cost efficient catalysts for oxygen evolution reaction (OER) is still a obstacle to realize the commercialization of electrocatalytic water splitting. Herein, interface engineering and heteroatom doping is adopted to synthesize iron and vanadium doped nickel sulfide on nickel foam via hydrothermal method followed by hydrogen treatment to create sulfur defects. The optimized nanoflower-like FeVNi3S2–x/NF is an efficient OER electrocatalyst that outperforms many of the reported transition metals catalysts. Benefiting from abundant sulfur defects and the synergistic effect of heteroatom doping, FeVNi3S2–x/NF exhibits an ultralow overpotential of 230 mV to reach a current density of 100 mA cm−2, a rapid reaction kinetics with a small Tafel slope of 46.6 mV dec−1, and a stable long-term durability in 1 M KOH. Experimental results and characterizations confirm that sulfur vacancies together with the synergistic effect from multiple heteroatom doping can effectively regulate the electronic structure, resulting in increased electrical conductivity and electrochemically active surface area, thus enhancing OER performance. Furthermore, in situ Raman spectroscopy reveals that, the reconstitution amorphous nickel oxyhydroxide (NiOOH) on the catalyst surface is responsible for catalyzing the OER reaction. This work represents a promising methodology to synthesize low-cost and highly active OER electrocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 44
·2307389
·
IF 19
Mengyang Wang,Hang Geng,Jichun Zhu,Yubo Cui,Shanheng Zhao,Junjie Fu,Dongxing Kou,Jie Sun,Chaoliang Zhao,Sixin Wu,Liming Ding,Zhi Zheng
One of the main issues that limits the efficiency of kesterite solar cells is the low diffusion and chemical activity of selenium clusters. Here, this work proposes a simple and effective pre-selenization strategy using Na 2 (Se 2 S) solution, which enables the direct introduction of hyperactive Se 2 , Se 3 , and Se 4 into the precursors. The results demonstrate that Se 2 , Se 3 , and Se 4 promote the formation of the Cu 2-x Se liquid phase and enhance the diffusion of elements from different micro-regions. Consequently, the ratios of Cu/(Zn + Sn) and Sn/Zn in different micro-regions of the absorber are controlled within the optimal range, exhibiting reduced fluctuations. The controlled environment suppresses the formation of Cu Zn and Sn Zn defects, as well as [2Cu Zn + Sn Zn ] defect clusters. Finally, a power conversion efficiency (PCE) of 12.86% is achieved, which is the highest PCE for kesterite solar cells made under ambient pressure and with N,N- dimethylformamide solvent.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhenglin Chen,Guangzhen Liu,Shuiping Yu,Lixia Yang,Lingyi Zheng,Zhihui Wei,Shenglian Luo
Cathode materials with high hydrogen peroxide (H 2 O 2 ) selectivity and Fe 2+ regeneration under macroneutral conditions are the essential for practical electro-Fenton processes. Herein, we develop an amorphous cobalt sulphide (CoSx(t = x)@Cu) cocatalytic electro-Fenton (EF) system capable of effectively degrading organic pollutants, such as sulfamethoxazole, at macroneutral pH conditions. Owing to the flexible electronic properties of amorphous structures and charge redistribution triggered by S defects, the optimum CoSx(t = 8)@Cu cathode successfully introduces H*/H + and promotes the in-situ evolution of H 2 O 2 . Additionally, an acidic microenvironment was constructed on the CoSx(t = 8)@Cu surface by the unreduced H*/H + , enabling a self-adjustment from alkalinity to acidity in the EF reaction without adding acid. Such self-adjustment effectually inhibits iron sludge production and promotes Fe 2+ regeneration, assuring 80% Fe 2+ cycling efficiency. More importantly, the EF system possesses outstanding stability and applicability for organic pollutant remediation regardless of water matrices. This work elucidates the intrinsic mechanism of amorphous electrocatalysts in overcoming the pH limitation of EF reactions, extending the applicability of Fenton technology.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Changdi Wang,Hao Wang,Lu Li,Ruiyang Zhao,Jishu Han,Lei Wang
Photocatalytic hydrogen production technology is an efficient method to solve the environmental pollution problem and obtain renewable energy. To improve the hydrogen production efficiency, it is still a great challenge to develop novel photocatalysts with high activity and high stability. In this work, a hollow rod-shaped Cu-In-Zn-S@ZnCo 2 O 4 @In 2 O 3 tandem heterojunction photocatalyst was designed and synthesized. Under visible light irradiation, the photocatalytic hydrogen production amount was up to 21404.54 μmol·g −1 in 5 h. The hollow tandem heterojunction would improve the light absorption, facilitate the electron transfer, inhibit the recombination of photogenerated electrons and holes, and provide more active sites for hydrogen production reaction. The design of Cu-In-Zn-S@ZnCo 2 O 4 @In 2 O 3 photocatalyst provided an effective method to enhance the photocatalytic hydrogen production performance.
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2023
·Vol. 9
·期 6
·489
·
IF 4.6
Yunling Ran,Guicai Zhang,Ping Jiang,Haihua Pei
High water cut of produced fluid is one of the most common problems in reservoir development. At present, injecting plugging agents and other profile control and water plugging technologies are the most widely used solutions. With the development of deep oil and gas resources, high-temperature and high-salinity (HTHS) reservoirs are becoming increasingly common. Conventional polymers are prone to hydrolysis and thermal degradation under HTHS conditions, making polymer flooding or polymer-based gels less effective. Phenol–aldehyde crosslinking agent gels can be applied to different reservoirs with a wide range of salinity, but there exist the disadvantage of high cost of gelants. The cost of water-soluble phenolic resin gels is low. Based on the research of former scientists, copolymers consisting of acrylamide (AM) and 2-Acrylamido-2-Methylpropanesulfonic acid (AMPS) and modified water-soluble phenolic resin were used to prepare gels in the paper. The experimental results show that the gelant with 1.0 wt% AM-AMPS copolymer (AMPS content is 47%), 1.0 wt% modified water-soluble phenolic resin and 0.4 wt% thiourea has gelation time of 7.5 h, storage modulus of 18 Pa and no syneresis after aging for 90 days at 105 °C in simulated Tahe water of 22 × 104mg/L salinity. By comprehensively comparing the effectiveness of the gels prepared by a kind of phenolic aldehyde composite crosslinking agent and modified water-soluble phenolic resin, it is found that the gel constructed by the modified water-soluble phenolic resin not only reduces costs, but also has shorter gelation time and higher gel strength. The oil displacement experiment with a visual glass plate model proves that the forming gel has good plugging ability and thus improves the sweep efficiency. The research expands the application range of water-soluble phenolic resin gels, which has an important implication for profile control and water plugging in the HTHS reservoirs.Keywords:low-cost gel;AM-AMPS copolymer;high-temperature and high-salinity resistant gel;oil displacement experiment
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Bio Materials
·
2023
·
IF 4.7
Yuetong Kang,Yun Zhang,Xinrui Li,Xiaoyu Wang,Jingqi Zhang,Lidong Li
Molybdenum-based nanomaterials with variable oxidation states can be developed as nanozyme catalysts. In this work, we developed a one-pot method for the preparation of molybdenum disulfide assisted by protein. Protamine was used as a cationic template to link molybdate anions and form complexes. During hydrothermal synthesis, protamine can affect the nucleation process of molybdenum disulfide and inhibit their aggregation, which facilitates the fabrication of small-sized molybdenum disulfide nanoparticles. Moreover, the abundant amino/guanidyl groups of protamine could both physically adsorb and chemically bond to molybdenum disulfide and further modulate the crystal structures. The optimized size and crystalline structure enabled a higher exposure of active sites, which enhanced the peroxidase-like activity of molybdenum disulfide/protamine nanocomposites. Meanwhile, the antibacterial activity of protamine was retained in the molybdenum disulfide/protamine nanocomposites, which could synergize with the peroxidase-like activity of molybdenum disulfide to kill bacteria. Therefore, the molybdenum disulfide/protamine nanocomposites are good candidates for antibacterial agents with lower chances of antimicrobial resistance. This study establishes an easy way to design artificial nanozymes by compounding suitable components.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）