Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 24
·14646-14658
·
IF 10.7
Aihua Yan,Tongyang Zhang,Fei Huang,Shijian Lu,Quande Wang,Huaqi Yuan,Ye Gao,Wenxue Zhao,Jixu Zhang,Zigao Su
Exploring visible-light-driven photocatalytic materials for water splitting is of great significance for achieving green and renewable hydrogen fuel. In this work, MoS2/Sv-ZnIn2S4/Cu(OH)2 (MS/Sv-ZIS/COH) dual-junction composites for hydrogen generation were constructed by an in situ structure-tailored technique. Based on the in situ decomposition of Cu3Mo2O9 (CMO), the instantaneous formation of the sulfur vacancy (Sv), Ohmic-type MS/Sv-ZIS heterojunction and Schottky-type Sv-ZIS/COH heterojunction not only markedly boosted the carrier separation and quickly expedited the charge transfer, but also efficiently inhibited charge recombination and significantly accelerated the hydrogen reduction dynamics. As a result, such composites exhibited an optimum hydrogen production rate of 11.5 mmol h−1 g−1, which was approximately 4.6 times higher than that of pristine ZIS. This work provides an in situ design method to construct new photocatalytic materials for accelerating the redox dynamics and enhancing the water splitting performance.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yanqing Cong,Qiuang Zheng,Xiaoran Wang,Xinyue Li,Qiuyu Zheng,Shi-Wen Lv
It is of great significance for a clean energy system to develop novel non-noble catalysts toward the alkaline hydrogen evolution reaction (HER). Herein, CQDs-doped Ni(OH) 2 nanosheets generated on nickel foam were fabricated by a feasible method using Ni-MOF as precursor. Notably, the alkali etching treatment can open the spatial structure of Ni(OH) 2 and expose more active sites, thereby improving the electrocatalytic active surface area . Meanwhile, introduced CQDs can be acted as the charge carrier and accelerate the charge transfer. As a result, the Ni(OH) 2 -CQDs nanosheets showed excellent electrocatalytic performance in HER under alkaline condition, and an overpotential of 101 mV for OER over Ni(OH) 2 -CQDs/NF electrode can be realized at a current density of 10 mA/cm 2 . More significantly, embedding CQDs can effectively boost the photocatalytic activity of Ni(OH) 2 . Thus, light radiation can enhance the performance of Ni(OH) 2 -CQDs/NF electrode in HER, and the overpotential of Ni(OH) 2 -CQDs/NF electrode for HER can reduce to 90 mV under light irradiation . Furthermore, the Ni(OH) 2 -CQDs/NF electrode displayed great HER stability, and the possible mechanism of photo-assisted electrochemical HER was also proposed. All in all, current work will share some valuable insights into preparation and application of catalysts in HER.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yuyan Feng,Dongbo Wang,Qingge Feng,Chenghua Fan,Ying Lu,Wenqiang Yang
Activation of peroxymonosulfate (PMS) to generate reactive oxygen species (ROS) for pollutant degradation via metal-free photocatalysts is an important green wastewater treatment and remediation method, but the pathway for generating ROS via exciton effects in catalysts is often overlooked. In this study, OH/C=O co-modified N-defective rod-shaped carbon nitride (Nv-CN-O) was designed and synthesized by soft template and alkali hydrothermal method. In the Nv-CN-O/PMS/Light system, there was a synergistic degradation of tetracycline (TC) by carriers and excitons, with a degradation rate 2.15 times higher than that of CN/PMS/Light. N vacancies and OH/C=O enhanced the adsorption to PMS, accelerated the charge transfer process, and activated PMS to generate ·O 2 − dominated reactive species. The functional group OH/C=O promoted the production of triplet excitons that through the energy transfer pathway to promote the production of 1 O 2 . Abundant ROS were involved in the TC degradation process, and three possible TC degradation pathways were proposed. Nv-CN-O has strong anti-interference ability in actual water bodies, shows a promoting effect on the degradation of TC, which has practical application potential.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Ting-Ting Ruan,Wen-Wen Wang,Chun-Li Hu,Xiang Xu,Jiang-Gao Mao
Two new lead(II) borate-sulfate mixed-anion compounds, namely, Pb 4 (BO 3 ) 2 (SO 4 ) and Pb 2 [(BO 2 )(OH)](SO 4 ), have been prepared by using high-temperature melt method or hydrothermal reaction . These compounds exhibit two different types of 3D structures composed of the same anionic units of BO 3 triangles and SO 4 tetrahedra which are interconnected by lead(II) cations. In Pb 4 (BO 3 ) 2 (SO 4 ), the lead(II) ions are bridged by borate anions into 3D [Pb 4 (BO 3 ) 2 ] 2+ architectures with 1D tunnels of 8-member rings along the a -axis, which are filled by the sulfate anions. In Pb 2 [(BO 2 )(OH)](SO 4 ), the lead(II) ions are interconnected by borate and sulfate anions into 2D Pb-B-O and Pb-S-O layers parallel to the ab plane, respectively, and these layers are further condensed into the 3D lead(II) borate-sulfate framework. TGA and DSC studies indicate that Pb 4 (BO 3 ) 2 (SO 4 ) is congruently melting with a melting point of 689 °C whereas Pb 2 [(BO 2 )(OH)](SO 4 ) decomposes at approximately 335 °C. UV/Vis/NIR optical diffuse reflectance spectrum measurements reveal the optical band gaps of 4.03 and 4.08 eV for Pb 4 (BO 3 ) 2 (SO 4 ) and Pb 2 [(BO 2 )(OH)](SO 4 ), respectively. Furthermore, the electronic structures of Pb 4 (BO 3 ) 2 (SO 4 ) have also been calculated.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Fei Duan,Yunqin Hu,Junfeng Lin,Mingyue Li,Hao Wu,Zhiqing Cui,Caihong Fang
To develop non-noble electrocatalysts with high activity and stability for oxygen evolution reaction (OER)/urea oxidation reaction (UOR) is crucial to boost the efficiency of overall water/urea splitting reaction (OWS/OUS) for H 2 production. Herein, we synthesized novel CeO 2 /Co(OH) 2 /FeS nanosheet arrays on nickel foam (CeO 2 /Co(OH) 2 /FeS@NF) through a simple two-step hydrothermal and following solvothermal routine. In this special structure, the ultra-thin 2D nanosheet morphology can adequately offer large contact area and thus abundant of active sites, facilitating significantly the mass transfer. Furthermore, the incorporation of FeS into CeO 2 /Co(OH) 2 will not only modify the electron structure but also provide a number of phase interfaces, which can improve the inherent electron conductivity and promote the electron transport. More importantly, the rich oxygen vacancies (O v ) sites can vary the coordination of metal centers, modulating both the charge distribution and M−O bonding strength. As results, the CeO 2 /Co(OH) 2 /FeS@NF shows superior low overpotentials of 178 mV/1.30 V at 10 mA cm −2 to OER/UOR. The activity keeps its low value of 232 mV/1.375 V even when the current density was increased to as high as 300 mA cm −2 . More importantly, the electrode of CeO 2 /Co(OH) 2 /FeS@NF//CeO 2 /Co(OH) 2 /FeS@NF just requires a low cell voltage of 1.41 V to realize OUS at a current density of 10 mA cm −2 . Specifically, we also realized solar-driven H 2 production. Plenty of H 2 bubbles were continuously generated with a high speed of 600 L h −1 m −2 on the working electrode surface once the solar panel was placed under the natural sunlight.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaoshuang Zhou,Bing Chen,Wei Wang,Liang Liu,Xiankai Li,Long Chen,Yanhui Li,Yanzhi Xia,Lijie Ci
The increasing requirements for wearable and portable electronics are driving the interests of high performance fiber supercapacitor. Layered double hydroxide (LDH) is broadly used in electrode materials, owing to the adjustability of components and the unique lamellar structure. However, limited active sites and poor electrical conductivity hinder its applications. Herein, the core–shell heterostructured Ni(OH) 2 @activation Zn-Co-Ni layered double hydroxides (Ni(OH) 2 @A-ZnCoNi-LDH) electrode was fabricated by loading pseudocapacitance material on the A-ZnCoNi-LDH to improve the electrochemical performance. Significantly, benefits from the synergistic effect of the multi-metal ions and the core–shell heterostructure, the electrodes demonstrated a capacitance of 2405 mF·cm −2 at 1 mA·cm −2 . Furthermore, Ni(OH) 2 @A-ZnCoNi-LDH was used as the core electrode and carbon nanotube (CNT) film coated with Fe 2 O 3 @reduced graphene oxide (rGO) was wrapped around the core electrode to assemble coaxial fiber asymmetric supercapacitor, which illustrated an ultrahigh energy density of 177.7 µWh·cm −2 at 0.75 mW·cm −2 . In particular, after consecutive charging and discharging 7000 cycles, the capacitance retention of the device was 95 %, indicating the excellent cycling stability. Furthermore, the device with high flexibility can be woven into textiles in different shapes. The fabricated device has an excellent development prospect as an energy source in wearable electronic devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Water
·
2024
·Vol. 16
·期 11
·1467
·
IF 3
Liying Che,Huanhuan Ji
Hydrotalcite/bismuth solid solution (2D/2D CoAl-LDH/BiO(OH)XI1−X) heterojunction photocatalysts were fabricated through a hydrothermal route. Because of their identical layered structure and interlayer hydroxides, CoAl-LDH(2D) and BiO(OH)XI1−X(2D) form a tightly bonded heterojunction, resulting in efficient light absorption, excitation, and carrier migration conversion. At the same time, the large specific surface area and abundant hydroxyl groups of the layered structure make the heterojunction catalyst exhibit excellent performance in the photocatalytic degradation of organic pollutants. Under visible light irradiation and in the presence of 1 g/L of the catalyst, 10 mg/L of methyl orange (MO) in water could be completely degraded within 20 min, and the degradation rate of tetracycline (TC) reached 99.23% within 5 min. CoAl-LDH/BiO(OH)XI1−Xstill maintained good photocatalytic degradation activity of tetracycline after five cycles, and the structure of the catalyst did not change. The reaction mechanism related to the degradation of TC by photocatalytic reactions was explored in detail, and the photoexcitation of the semiconductor heterojunction, as well as the subsequent free radical reaction process and the degradation pathway of TC were clarified. This work provides a promising strategy for the preparation of efficient photocatalytic materials and the development of water purification technology.
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Wenhao Zhang,Meiyan Cui,Zhiying Zhao,Tianyu Zhu,Zhangzhen He
Based on the crystal structure of A2Cu5(TeO3)(SO4)3(OH)4 (A = Na, K), two new compounds ACo5(SeO3)4(OH)2F (A = Rb, Cs) have been synthesized by introducing F− ions, achieving the extension from a one-dimensional kagomé strip lattice to a distorted 2-uniform lattice (T29). Magnetic measurements indicate that RbCo5 exhibits antiferromagnetic order at low temperatures, while CsCo5 shows canted antiferromagnetic behavior. Both compounds display a field-induced magnetic transition at their respective critical fields. To the best of our knowledge, this is the first reported synthesis of compounds with a distorted 2-uniform lattice (T29).
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Wenhao Xia,Shimeng Liu,Lihui Huang,Hao Wu,Tao Bai,Shanshan Wang,Fei Hao,Xiao Wang,Wen Wang
d -tagatose, a rare sugar with broad applications in the food and pharmaceutical industries, can be synthesized from d -fructose by epimerases, an approach with significant biosynthesis potential. However, so far there has been only one attempt to engineer tagatose 4‑epimerase through random mutagenesis. The lack of exploration has severely restricted the application of epimerases in the industrial production of d -tagatose. The previous research primarily focused on enhancing the catalytic activity of epimerases through random mutagenesis, with limited understanding of how substrate-adjacent residues affect enzyme efficiency, which was hence the subject of this study. First, using a semi-rational design approach, after three rounds of mutagenesis and screening, the mutant (S125D/S268A/Q124E) of D-tagaturonate epimerase (UxaE) from Thermotoga neapolitana was obtained, which increased d -tagatose production efficiency by 10.8-fold compared to the wild type, with a specific activity of 1505.6 U/g, representing the highest specific activity reported for a UxaE mutant to date. Molecular dynamics simulations showed that the substitution of Ser to Asp-125 enhanced substrate-enzyme interactions, while the substitution of Glu to Gln-124 reinforced the hydrogen bond network around the catalytic residue Glu-128, further reshaping the substrate-binding pocket and enhancing catalytic activity. This study for the first time explored the enhancement of the C4 epimerization function of epimerases by reshaping their substrate-binding pockets, thereby providing a feasible route for the industrial biosynthesis of d -tagatose.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhenfei Lv,Mengke Fan,Yukun Cao,Xin Wang,Chong Lan,Qingping Wang,Chen Yang,Xiulin Shen,Xiujuan Feng
In this study, a low-cost foam ceramic was prepared by a high-temperature reconstruction method using gangue and waste electric porcelain as the main materials. The results showed that the sintering temperature, foaming agent (waste SiC slab) content and modifier Ca(OH) 2 had significant effects on the macrostructure, microstructure, crystalline phases and properties of the foam ceramics. With a sintering temperature of 1190 °C, waste SiC slab dosage of 3 % and the addition of the modifier Ca(OH) 2 , the obtained ceramics showed an earthy-yellow appearance, a compressive strength of 1.20 MPa, an apparent porosity of 64.00 %, a bulk density of 1.08 g/cm 3 , and a vertical expansion of 165 %. The increase of sintering temperature and foaming agent content improved the size of the pores. The SiO 2 protective layer of waste SiC slab was destroyed with the addition of Ca(OH) 2 , resulting in an increase in the porosity of foam ceramics by 24.9 %. Meanwhile, the introduction of calcium ions led to the fracture of Si-O bond and the reduction of liquid phase viscosity, thereby improving the uniformity of the pores. This study provides an innovative strategy and novel ideas for the value-added utilization of solid waste and the preparation of foam ceramics.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mengyao Hua,Siyi Wang,Meng Cheng,Guangming Liang,Yafen Zhou,Lei Xu,Guofang Zhang
Photocatalysts UiO-66-(OH) 2 /MnO 2 -TiO 2 with intimate contact interfaces were successfully synthesized by impregnation methods and all of the composites were characterized by a variety of analytical techniques. The results indicated that MnO 2 and TiO 2 form a heterojunction and tightly attached to the surface of UiO-66-(OH) 2 , the generation of MnO 2 -TiO 2 heterojunction improved the catalyst electron-hole separation efficiency, and there was a strong electronic interaction between MnO 2 -TiO 2 and UiO-66-(OH) 2 in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH) 2 , and efficient interfacial charge transfer between UiO-66-(OH) 2 and MnO 2 -TiO 2 have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. Meanwhile, the hydroxyl radicals (·OH) and superoxide radicals (·O 2 - ) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 70UO/MnO 2 -TiO 2 (1 g 0.15 m 3 ) in self-made closed system under high pressure mercury lamp irradiation is 88.19 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 95.19 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jixu Zhang,Liang Mao,Aihua Yan,Fei Huang,Nan Li,Zigao Su,Huaqi Yuan,Bolei Hui,Heng Wang
The sluggish charge-carrier kinetics for conventional photocatalysts severely limit the photogenerated charge utilization and result in unfavorable hydrogen evolution efficiency. To address these challenges, CoS/S v -ZnIn 2 S 4 /Ni(OH) 2 photocatalysts, containing sulfur vacancy, p-n-type heterojunction and Ohmic contact, were successfully constructed via an in-situ technique. Defect-mediated enrichment of photogenerated electrons at sulfur vacancies achieved fast charge transfer and inhibited the carrier recombination. The interfacial electric field (IEF) due to p-n-type heterojunction enhanced the carrier separation and transfer. Ohmic contact rapidly extracted the photogenerated charges and accelerated the hydrogen reduction reaction dynamics. As expected, CoS/S v -ZnIn 2 S 4 /Ni(OH) 2 catalysts reached an impressive hydrogen evolution rate of 19.45 mmol g −1 h −1 , which was 8.61 times higher than that of pure ZIS. This work demonstrates that the synergistic effect between sulfur vacancies and IEF effects may establish a new paradigm for designing high-efficiency multi-component sulfide-based photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）