Catalysts
·
2026
·Vol. 16
·期 5
·417
·
IF 4.5
Ziyan Mi,Huayun Long,Yuhua Jia,Yue Ma,Cuilan Miao,Yan Xie,Xiaomei Zhu,Jiahui Huang
Developing effective catalysts for the epoxidation of propylene with H2and O2holds significant scientific and industrial significance. This study synthesized a series of Au/TS-1 catalysts modified with alkali metals (Na+, Cs+) and carefully examined their impact on gas-phase propylene epoxidation, with particular attention to the role of anions. The optimal Au–CsC(1:10)/TS-1 catalyst (Cs2CO3modified, Au/Cs molar ratio = 1:10) achieves a propylene conversion of 16.8%, a PO selectivity of 88.5%, an H2efficiency of 40.8%, a record PO formation rate of 383.9 gpo·kgcat−1·h−1, and unprecedented long term stability (>380 h without deactivation). To the best of our knowledge, no previous study has simultaneously achieved such balanced and outstanding performance across all these key indicators. Comprehensive characterization reveals that Cs+modification suppresses side reactions and coke formation, increases microporosity, tunes surface acid–base properties and hydrophobicity, restricts Au particle size, and stabilizes both Au0and tetra coordinated Ti sites, thereby inhibiting H2O2decomposition and PO isomerization while greatly enhancing reaction efficiency. This holistic advancement represents a significant leap forward for Au based catalysts in gas phase propylene epoxidation, offering both a theoretical foundation and practical guidance for the development of high performance epoxidation catalysts.
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ChemistrySelect
·
2023
·Vol. 8
·期 11
·e202204286
·
IF 2.1
Yating Zeng,Hanping Fu,Liran Liu,Li Feng,Tianxiang Zhang,Qingshuang Liang,Xiufeng Xiao
Graphical A novel 2D/1D/-2D RP/BP-MBWO composed of in situ junction and Z-scheme system has been successfully synthesized. Benefiting from this favourable interfacial and structural characteristics, the fabricated BP/RP-MBWO photocatalyst shows a sharply improved photocatalytic H 2 and H 2 O 2 evolution performance. Exploring multifunctional photocatalysts with rational design and construction of unique transport channels is of great significance for the value-added chemicals production and environmental remediation. In this work, a novel 2D/1D/-2D RP/BP-MBWO dual heterostructure photocatalyst has been successfully synthesized by loading the in-situ grown 2D/1D RP/BP heterostructure on the 2D Bi 2 WO 6 nanosheets. through simple ultrasonic agitation.Benefiting from this favourable interfacial and structural characteristics, the fabricated BP/RP-MBWO photocatalyst shows a sharply improved photocatalytic H 2 and H 2 O 2 evolution performance. Excitingly, the optimal of H 2 O 2 production rate of the BP/RP-Bi 2 WO 6 composites is as high as 622.5 μmol g −1 h −1 under visible light irradiation, which is approximately 15 times as that of pure MBWO. The hydrogen production performance of the complexes was significantly improved compared to the pure MBWO samples. When the BP/RP loading was 20 %, the prepared nanocomposites showed the highest photocatalytic hydrogen evolution efficiency with the hydrogen production rate of about 0.77 μmol ⋅ g −1 ⋅ h −1 . This work is expected to offer a new inspiration for the rational design and construction of effcient photocatalyst systems toward solar energy capture and conversion.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiaojiao Jiao,Zexiang Wang,Jing Wang,Tiantian Yao,Zongliang Chen,Chen Chen,Li Sun,Xian Zhao,Weiliu Fan
The reasonable design of g-C 3 N 4 (CN)-based homojunctions is a promising method to improve the photocatalytic performance. Controlling the interfacial charge-transport process is challenging. Herein, Ag and P-doped CN (ACN and PCN) were selectively synthesized. The band edges of CN move downward continuously with increasing Ag or P doping concentration. CN/4ACN (type-II), CN/8PCN (S-scheme) and 4ACN/8PCN (S-scheme) were formed by suitable energy level matching, and their charge transfer mechanisms were confirmed via VB-XPS, UPS and ESR analysis. In the presence of the hole sacrificant triethanolamine (TEOA), both CN/4ACN and 4ACN/8PCN exhibited better H 2 evolution reaction (HER) rate than CN/8PCN due to the improvement in conductivity caused by Ag doping. However, only CN/8PCN and 4ACN/8PCN exhibited HER coupled with tetracycline (TC) degradation performance owing to the high redox potential of the S-scheme. Benefiting from a good carrier transport property and high redox potential, 4ACN/8PCN exhibited the best HER rate (2305.6 μmol·g −1 ·h −1 ) with TEOA as the hole sacrificant, which was 11.7 times than that of pure CN, respectively, and achieved a high HER rate (117.8 μmol·g −1 ·h −1 ) coupled with simultaneous TC degradation. This study provides a basic understanding of CN homojunctions, which shows potential for expanded applications in photocatalytic H 2 evolution and pollutant degradation.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Shuohan Yang,Yonghou Xiao,Wuyue Zhang,Yu Qiao,Qidong Zhao,Ning Zhang,Gaohong He
Cuprous ion-based zeolites have been proven as promising carbon monoxide (CO) adsorbents by virtue of their excellent adsorption and regeneration properties due to π complexation. However, existing preparation methods still suffer from the problems of a cumbersome process and low loading amounts of cuprous ions. Herein, we proposed a one-step synthesis strategy of using ethanol as a solvent to provide a reducing protective environment, which enabled the facile and controllable preparation of highly dispersed CuCl over 5A zeolites. Using CuCl as a copper source, to ensure the integrity of the 5A zeolite structure, CuCl species were directly loaded onto the 5A support in one step. Ethanol solution could effectively protect Cu(I) from being oxidized by oxygen in air and improve the stability of cuprous ions in Cu(I)/5A adsorbents. The results demonstrated that the Cu(I)/5A prepared by this method exhibited a superior CO adsorption performance to the pristine 5A zeolite. The adsorption capacity of CO over Cu(I)/5A attained 3.44 mmol·g–1 at 298 K and atmospheric pressure, which was evidently superior to those of CuY (2.7 mmol·g–1) and CuSAPO34 (1.84 mmol·g–1) reported in the literature, while the adsorption capacity of H2 was only 0.069 mmol·g–1 under the same condition. According to the ideal solution adsorption theoretical model, CO was preferentially adsorbed and the IAST selectivity of CO in the CO/H2 binary mixture over Cu(I)/5A was about 273.4. This study provides a novel and effective way to synthesize high-efficiency CO adsorbents.
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ACS Applied Energy Materials
·
2022
·
IF 6.959
Jiale Wang,Qian Xiang,Wencong Zhang,Fenglei Shi,Fan Li,Peng Tao,Chengyi Song,Wen Shang,Tao Deng,Jianbo Wu
Electrochemical CO2 reduction (ECR) into syngas is a promising method to reduce CO2 in the atmosphere. However, balancing the activity of ECR and hydrogen evolution reaction (HER) and controlling the stable CO/H2 ratios in a large potential range for the industrial desired syngas are still challenging. Herein, a low-cost Ni-doped ZnO nanosheet array on a zinc foil is synthesized via a convenient hydrothermal method to produce a controllable ratio of CO/H2 into syngas. Because of the lower impedance and larger electrochemical area, Ni-doped ZnO has a more significant current density. Furthermore, by adjusting the Ni doping content in the ZnO nanosheet, the activity of ECR and HER could be controlled, and the ratio of CO/H2 can be tuned from 0.1 to 4.5 over a wide potential range (−1.2 to −1.8 V vs reversible hydrogen electrode, RHE), surpassing most of the reported work. Such a wide range and stable ratio of CO/H2 in a broad potential range makes it possible to convert CO2 into feedstock for many essential chemical products.
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Reaction Chemistry & Engineering
·
2021
·Vol. 7
·期 1
·84-100
·
IF 4.239
Jungang Yi,Xianghui Wu,Huadong Wu,Jia Guo,Kun Wu,Linfeng Zhang
With the aim of solving the increasingly serious problem of environmental pollution and the energy crisis, in this work a novel NH2-MIL-53(Fe)/AgSCN (NMFA) composite photocatalyst was successfully prepared through a one-step chemical precipitation method. The prepared composites demonstrate an excellent photocatalytic performance for ciprofloxacin (CIP) and rhodamine B (RhB) degradation under visible-light irradiation. Within 60 min, the degradation rate for CIP and RhB reached 90% and 100%, respectively, which was 1.84/3.33 times and 1.79/2.04 times greater than that of the single NH2-MIL-53(Fe) and AgSCN samples. Furthermore, the H2 production rate of the NMFA-5 composite was 4742 μmol g−1 h−1, which was 5.25 and 17.37 times greater than that of the pure samples. Owing to the combination of NH2-MIL-53(Fe) and AgSCN, the separation and transmission efficiency of the photon-generated carriers in the composites was improved, which was demonstrated using optical characterization and a series of electrochemical characterization techniques. In addition, a possible mechanism for the excellent photocatalytic performance of the NMFA composites is discussed. The work in this paper may provide a technical reference for the application of silver modified metal organic frameworks (MOFs)-based composite photocatalysts for the treatment of environmental remediation.
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DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 30
·10501-10514
·
IF 4.39
Xuqiang Hao,Dingzhou Xiang,Zhiliang Jin
Herein, a novel amorphous monodisperse Co3O4 quantum dots/3D hexagonal CdS single crystals (0D/3D Co3O4 QDs/CdS) p–n heterojunction was constructed by a simple hydrothermal and electrostatic self-assembly method. The amorphous monodispersed Co3O4 QDs (≈4.5 nm) are uniformly and tightly attached to the surface of the hexagonal CdS single crystals. The sample, 0.5% CQDs/CdS exhibits outstanding hydrogen evolution activity of 17.5 mmol h−1 g−1 with a turnover number (TON) of 4214, up to 10.3 times higher than that of pure CdS. The enhanced photocatalytic activity can be attributed to the synergistic effect of the p–n heterostructure and the quantum confinement effect of Co3O4 QDs, which significantly promoted the separation efficiency of photo-generated electrons and holes. Additionally, the sulfur vacancy also can act as electron trappers to improve carrier separation and electron transfer. The photoelectrochemical and time-resolved fluorescence (TRPL) results further certify the effective spatial charge separation. This work gives an insight into the design of the 0D/3D Co3O4 QDs/CdS p–n heterostructure for a highly efficient photocatalysis.
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Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 43
·22772-22781
·
IF 8.867
Piyong Zhang,Ting Song,Tingting Wang,Heping Zeng
The field of photocatalytic hydrogen evolution has almost exclusively concentrated on semiconductor photocatalysts, with few reports of non-semiconductor photocatalytic systems due to the small number of non-semiconductor catalysts and their poor photocatalytic ability. Herein, dendrite-like plasmonic CuNi bimetal was prepared by a hydrothermal method, followed by modification with reduced graphene oxide (rGO) nanosheets to facilitate the separation of the electron–hole pair and improve the photocatalytic H2 evolution rate. The electron–hole pair originates from the surface plasmon resonance (SPR) effect of Cu in CuNi bimetal. Importantly, a near-infrared photocatalytic activity was confirmed with monochromatic light irradiation at a wavelength of 800 and 900 nm in the photocatalytic system due to the broad-spectrum response of plasmonic Cu. In addition, this photocatalyst exhibited favorable stability and repeatability in five consecutive runs of accumulatively 30 h. This study provides a new and significant approach for the development of a non-semiconductor photocatalytic system, which could effectively broaden the scope of the photocatalyst field.
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Applied Food Research
·
2025
·
IF 6.2
Guodong Shan,Xiuqin Fan,Qingcheng Wang,Li Zhang,Lijun Ge,Weibo Lu,Jing Xue,Kang Chen,Zejun Wang,Qing Shen
The inappropriate use of H2 receptor antagonists (H2RAs) in functional foods (FFs) and food-medicine homology materials (FMHs) designed to enhance gastrointestinal function (IGF) presents health risks due to potential adverse effects. In this study, an analytical method that integrates Captiva EMR-Lipid (CEL) solid-phase extraction (SPE) with liquid chromatography tandem mass spectrometry (LC-MS/MS) has been developed for the detection of H2RAs (nizatidine, famotidine, cimetidine, ranitidine, and lafutidine) in these products. Through the optimization of CEL-SPE parameters, such as using 200 mg of sorbent and eluting with ACN/water (80/20, v/v), the recovery rates of H2RAs in IGF-FF and IGF-FMH ranged from 87.4 % to 94.6 % and 90.2 % to 97.1 %, respectively. The assessment of matrix effects revealed that the five H2RAs exhibit matrix suppression, necessitating the construction of matrix-matched standard curves with correlation coefficients (r 2 ) exceeding 0.9991. The detection limits ranged from 0.4 to 0.8 μg·kg −1 and the quantification limits ranged from 1.3 to 2.7 μg·kg −1 , with recovery rates spanning from 85.4 % to 97.1 % and relative standard deviations ≤ 15 %. The successful development of this technique not only helps safeguard consumer health but also provides scientific basis and technical support for market supervision, thereby preventing and addressing food safety risks.
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APPLIED ENERGY
·
2024
·
IF 10.1
Xianqing Zhu,Mian Xu,Shiyang Hu,Ao Xia,Yun Huang,Zhang Luo,Xiao Xue,Yao Zhou,Xun Zhu,Qiang Liao
Introducing waste plastics with high hydrogen contents (such as polyethylene) into the biomass gasification process is an effective way to upgrade the syngas . Despite their good catalytic abilities, some of the transition metals commonly applied for the co-gasification of biomass and plastic wastes are of high cost and have poor availability, which requires developing affordable transition metal-based catalysts with desirable catalytic performances for producing H 2 -rich syngas . Spent lithium-ion batteries , which have a huge annual output and pose a great threat to the environment, contain a high potential to prepare efficient catalysts for biomass and plastic co-gasification due to the richness of active transition metals (e.g., Ni, Co and Mn). Therefore, in this study, a novel Ni/Co/Mn-loaded mesoporous Al 2 O 3 catalyst was developed from the thermally decomposed spent LiNi x Co y Mn 1−x−y O 2 batteries (spent LIBs) for pinewood sawdust and polyethylene co-gasification as an effective means to achieve the zero-waste strategy. The results showed that Ni, Co and Mn could be non-selectively recycled from spent LIBs and uniformly loaded on γ -Al 2 O 3 support, and the support's mesopores were well-retained (average pore diameters around 11 nm). The highest H 2 productivity of the co-gasification could reach 17.16 mmol g −1 with a concentration of 36 vol% over the LIB-modified Al 2 O 3 . The modification by spent LIBs would enhance the catalyst's relative concentrations of acid-base sites in high-temperature regions, leading to the significant promotion of H 2 productivity from 600 to 800 °C (151.3%). Nickel and manganese in the LIBs were primarily responsible for the catalysis since their nanosized particles could endow the catalyst with accessible and reducible metallic sites for volatile reforming. The synergy among the Ni, Co and Mn could evidently intensify the oxygen vacancies of the LIB-modified Al 2 O 3 to promote the oxygen transfer reactions from steam to dissociative species for H 2 production. This study provided a novel and promising technology for synergistic valorization of spent lithium-ion batteries, biomass residues and plastic wastes to produce value-added H 2 -rich syngas.
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LANGMUIR
·
2024
·
IF 3.7
Adugna Boke Abdeta,Feyisa Wedajo,Qinhan Wu,Dong-Hau Kuo,Ping Li,Hanya Zhang,Ting Huang,Jinguo Lin,Xiaoyun Chen
Cellulose plays a significant role in designing efficient and stable cellulose-based metallic catalysts, owing to its surface functionalities. Its hydroxyl groups are used as anchor sites for the nucleation and growth of metallic nanoparticles and, as a result, improve the stability and catalytic activity. Meanwhile, cellulose is also amenable to surface modifications to be more suitable for incorporating and stabilizing metallic nanoparticles. Herein, the Ag-/Bi-doped Mo(S,O)3 trimetallic sulfo-oxide anchored on B and N codoped cellulose (B–N–C) synthesized by a facile approach showed excellent stability and catalytic activity for PHER at 573.28 μmol/h H2 with 25 mg of catalyst under visible light, and 92.3% of the 4-nitrophenol (4-NP) reduction was achieved within 135 min by in situ-generated protons. In addition to B and N codoping, our use of the calcination method for B–N–C preparation further increases the structural disorders and defects, which act as anchoring sites for Ag-/Bi-doped Mo(S,O)3 nanoparticles. The Ag-/Bi-doped Mo(S,O)3@B–N–C surface active site also stimulates H2O molecule adsorption and activation kinetics and reduces the photogenerated charge carrier’s recombination rate. The Mo4+ → Mo6+ electron hopping transport and the O 2p and Bi 6s orbital overlap facilitate the fast electron transfer by enhancing the electron’s lifetime and photoinduced charge carrier mobility, respectively. In addition to acting as a support, B–N–C provides a highly conductive network that enhances charge transport, and the relocated electron in B–N–C activates the H2O molecule, which enables Ag-/Bi-doped Mo(S,O)3@B–N–C to have appreciable PHER performance.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Yating Ai,Jiajie Hu,Xianqiang Xiong,Sónia A.C. Carabineiro,Yuesheng Li,Nikolay Sirotkin,Alexander Agafonov,Kangle Lv
Efficient interfacial charge transfer and robust interface interactions are crucial to achieve superior spatial separation of carriers and develop advanced heterogeneous photocatalysts . This study describes the synthesis of a novel S-scheme heterojunction of ZnO/In 2 S 3 , with S−O covalent bonds , achieved through a hydrothermal method . The optimized heterojunction shows exceptional photocatalytic activity , achieving a H 2 generation rate of 2488 μmol g −1 h −1 and a degradation efficiency of 86 % for tetracycline hydrochloride (TCH) within 2 h. These values surpass those of In 2 S 3 alone by 35 and 1.4 times, respectively. Various techniques, including electron spin resonance, X-ray photoelectron spectroscopy, Kelvin probe force microscopy and density functional theory calculations confirm the S-scheme heterojunction. The establishment of a chemical S−O bond between In 2 S 3 and ZnO facilitates an atomic level interfacial pathway, enabling efficient transportation of interfacial electrons.
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