Journal of Materials Chemistry A
·
2024
·
IF 10.7
Zhengjie Su,Binghong Wu,Dong-Hau Kuo,Longyan Chen,Pengkun Zhang,Baoqian Yang,Xinru Wu,Dongfang Lu,Jinguo Lin,Xiaoyun Chen
Herein, we demonstrate a Mo/S co-doped BiOBr-based bimetal bismuth sulfur-oxybromide (Mo/S-BiOBr) catalyst with heterovalent molybdenum states and abundant oxygen vacancy defects for photocatalytic hydrogen evolution (PHER) via a facile method. Mo/S co-doping adjusts the energy band structure of BiOBr and expands its visible light absorption. Hydrazine regulates the molybdenum with heterovalent states while endowing Mo/S-BiOBr with oxygen vacancy defects to balance the valence-charge deviations from electrical neutrality induced by Mo6+ → Mo4+. These oxygen-vacancy defects act as active sites for capturing water molecules and activating the H–O–H bond to produce protons for hydrogen generation. The heterovalent Mo6+/Mo4+ states act as photogenerated electron hosts to hop fast between Mo6+ and Mo4+, facilitating efficient electron transfer for the PHER. The hybridization between S 3p and O 2p orbitals improves the stability of continuous PHER. The hydrazine-regulated Mo/S-BiOBr-3 with an optimal n(Mo4+)/n(Mo4+ + Mo6+) ratio and abundant oxygen vacancy defects exhibit an excellent PHER activity of 710.5 μmol h−1 at a catalyst weight of 50 mg and an apparent quantum efficiency (AQE) of 13.9% at 420 nm. After six recycles, the H2 yield of Mo/S-BiOBr-3 decreased by only about 3.5%, indicating its good stability and durability. This work provides a practical approach to using bismuth-based oxyhalides in the PHER.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Xiaoping Wang,Bowen Yang,Haoye Wang,Haixin Guo,Richard Lee Smith,Yaqiong Su,Xinhua Qi
Photocatalytic oxidative dehydrogenation of biomass feedstocks offers the possibility for synthesizing value-added chemicals, but the sluggish transport kinetics and rapid recombination of photogenerated charge carriers constrain photocatalysis efficiency. Spin-polarized photocatalysts, by accelerating the separation of photogenerated electrons and holes, offer a promising strategy for selective biomass valorization. Herein, polarization unit Mo was incorporated into ZnIn 2 S 4 (ZIS) with S-vacancy through Mo–S 4 coordination (Mo-Vs-ZIS) to enhance hole and proton-coupled electron transfer (PCET). Mo-Vs-ZIS spin polarized photocatalyst applied to 5-hydroxymethylfurfural (HMF) afforded a 2,5-diformylfuran (DFF) selectivity of 92.3% at a production rate of 1105.3 µmol g cat −1 h −1 , attributed to carrier transport and reaction processes. The Mo-Vs-ZIS photocatalyst efficiently (100 min) converted benzyl and furfuryl alcohols, aromatic alcohols bearing electron-rich substituents, and halogen-substituted aromatic alcohols into their corresponding aldehydes. Piezoelectric force microscopy (PFM) and Kelvin probe force microscopy analyses (KPFM) revealed that the full-space polarized electric field was formed to drive directional transfer of photogenerated carriers, facilitating bulk-to-surface charge separation. Moreover, Mo-Vs-ZIS showed high Bader charge transfer to O 2 , where Mo atomic sites functioned as an electron reservoir, driving the activation of O 2 to form •O 2 − , a kinetically favorable step for HMF oxidation and induced transfer of holes to activate C( sp 3 )–H bonds, which is a rate-determining step. Then, the critical step of PCET (•O 2 − +H + →•OOH) over Mo-Vs-ZIS gave •OOH for O–H activation to complete the reaction sequence. This spin-polarized modification strategy featuring atomic-level catalytic sites enables its application to other semiconductor photocatalysts for biomass conversion.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Guanhua Xing,Siyang Liu,Qingxin Guan,Wei Li
This paper focused on the isomerization and cracking of n -alkanes to synthesize bio-jet fuel. A series of SAPO-11 supports with different Si/Al molar ratio (0.2, 0.4, 0.6) were prepared, characterized, and evaluated by the hydroisomerization on hydrodeoxygenation product of castor oil. As a result, a Ni-Mo/SAPO-11(0.4) catalyst with hollow tubular structure and moderate acidic strength exhibited optimum conversion (97.2%) and jet fuel selectivity (81.6%) in the reaction. Subsequently, Ni-Mo/SAPO-11(0.4) was selected to carry out further experiments on studying the hydroisomerization and hydrocracking of long chain n -alkanes. The results show that increasing temperature may promote hydroisomerization and hydrocracking. Temperature is more favorable for the reaction with the length of the carbon chain decreasing, no matter conversion, hydrocracking degree or isomerization tendency. The product selectivity of different n -alkanes is associated with the carbon number. In reaction to n -C 18 , Ni-Mo/SAPO(0.4) surpassed the other two catalysts in the conversion and i/n ratio at 623 K which is the optimum temperature.
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Huihui Ding,Huanhuan Wu,Jun Ma,Xiang Li,Shuangshuang Huai,Shijian Zhang,Wenbin Ruan,Xiuxiu Huang,Xiufang Wang,Wenjie Xie
The high interfacial charge transfer barrier has been a primary thermodynamic obstacle in enhancing the catalytic performance of heterojunction materials. Optimizing the interfacial environment is a promising strategy to attain superior catalytic efficiency. Hence, a Bi/Bi2MoO6/Bi24O31Br10 (Bi/BMO/BOB) composite photocatalyst was constructed by introducing a Bi–O–Mo bridge bond between the BMO and BOB interfaces and modifying metal active sites on the surface of the complex. Bi/BMO/BOB has a good capacity for CO2 photoreduction to CO. The CO yield of the Bi/BMO/BOB photocatalyst is 68.29 μmol g−1 h−1, which is obviously higher than those of the pristine BMO and BOB. As proved by density functional theory (DFT) calculations and experimental characterization, the Bi–O–Mo interface bridge bond adjusts the electronic structure of the contact interface and enhances the interface charge separation and transport rate. Moreover, the metal Bi nanoparticles synthesized through in situ reduction not only realize electron transfer and storage as electron collectors, but also strengthen the adsorption of CO2 molecules. The synergistic action of the two can allow the effective transfer of photogenerated electrons from BMO to BOB, which then accumulate on Bi. Such stepwise transfer of electrons increases the speed of photocatalytic reduction processes that involve multiple electrons, and effectively reduces the reaction energy barrier in the process of CO2 reduction. This mode of interatomic electron transfer bridges combined with the metal active sites not only solves the stability issues in bismuth-based semiconductors, but also aids in the development of more efficient photocatalytic systems for reduction of CO2.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2014
·
IF 3.583
Shengling Sun,Jie Li
A method has been developed for the determination of zirconium (Zr), hafnium (Hf), niobium (Nb), tantalum (Ta), molybdenum (Mo), tungsten (W), and tin (Sn) in seawater by quadrupole inductively coupled plasma-mass spectrometry (Q-ICP-MS). The method is based on separation of the seven elements by extraction chromatography using N-benzoyl-N-phenylhydroxylamine (BPHA) supported on a microporous acrylic ester polymeric resin. The optimized procedure indicates that the BPHA resin has high selective adsorption for Zr, Nb, Mo, Sn, Hf, Ta, and W (known as fluoride soluble elements), whereas other interference and matrix elements are minimally adsorbed. The optimized eluent mixture with their molarity gives satisfactory recoveries for all analytes. The recovery can be achieved 99% for Zr, 97% for Nb, 97% for Mo, 99% for Sn, 99% for Hf, 95% for Ta, and 98% for W, respectively, by eluting with 6 mL of 6 mol L − 1 HF/1 mol L − 1 HCl. Furthermore, the technique for separation and enrichment of these elements provides a low total method blank. The detection limits for this method are 0.5 ppt for Zr, 0.2 ppt for Nb, 1.7 ppt for Mo, 1.0 ppt for Sn, 0.1 ppt for Hf, 0.1 ppt for Ta, and 0.3 ppt for W, respectively. The validity of the method is evaluated by replicate analyses of seawater reference materials; the precision of the results is better than 3% (RSD, n = 4), and the results are in good agreement with certified values. The established procedure has proved to be both practical and effective for seawater sample analyses.
研究领域:
分析化学
·
海洋化学
·
环境地球化学
·
痕量元素检测
·
质谱分析
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 49
·期 8
·3381-3393
·
IF 3.134
Yang Haoguo,Guo Yijun,Han Shitong,Xi Hailing,Lin Huaxiang,Yuan Rusheng,Ding Zhengxin,Long Jinlin,Lin Qun
Mustard gas is a kind of erosive poison with great harm and used as a chemical weapon since World War. It has suggested that the photocatalytic technology is an effective method to eliminate it. Because the small difference in molecular structure between 2-CEES and Mustard gas, and the less toxic of 2-CEES, 2-CEES is often used as a simulator to evaluate the photocatalytic activity of catalysts. In this work, symbiotic mixture of Bi 2 WO 6 and Bi 6 O 6 (OH) 3 (NO 3 ) 3 ·1.5H 2 O nanosheets doped with Mo (Mo-B-B) have been synthesized by a facile hydrothermal treatment. The samples were characterized by XRD, DRS, XPS, SEM, TEM, Raman, and PL. The photocatalytic activity of the samples was evaluated by measuring the degradation of 2-CEES under visible light irradiation. The results showed that the doped Mo reduce the Eg of bare symbiotic mixture and improve the separation efficiency of photo-generated carriers that is beneficial to photocatalytic activity. The optimum amount of doped Mo is 5% that exhibits the best activity for degradation for 2-CEES.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xi Chen,Yunfeng Chen,Songrong Li,Cheng Xue,Dongfang Liu,Wenli Huang
Phthalic acid esters (PAEs) pose serious health risks to humans and are difficult to remove by conventional sewage treatment processes. Herein, Fe 2 Mo 3 O 8 /MoO 2 /Mo 2 N composite (FMON) derived from bimetallic organic framework was used to activate peroxymonosulfate (PMS) for dibutyl phthalate (DBP) degradation. FMON exhibited an excellent catalytic effect with DBP removal efficiency of 92.4 % within 60 min. Mo 2 N showed a superior ability in promoting Fe 3+ /Fe 2+ redox cycle. The reduction efficiencies of Fe 3+ by Mo 2 N/MoO 2 composite and MoO 2 were 67 %–94 % and 11 %–23 %, respectively, in the homogeneous comparative experiment. Moreover, the ratio of Fe 2+ /Fe 3+ in FMON increased significantly after the catalytic reaction. Fe element doping also enhanced the reuse stability and reduced the metal ion leaching of the catalyst. The degradation of DBP was mediated by a variety of reactive species, of which SO 4 − , OH and O 2 − were dominant. Fe element, Mo element and O vacancies were confirmed to exert significant contributions as active sites in the catalytic process. Three degradation pathways of DBP were obtained by DFT calculation and HPLC-MS analysis. And the toxicity of DBP degradation products was significantly reduced based on the assessment result of Toxicity Estimation Software Tool (T.E.S.T.). This study explored a novel Fe/Mo bimetallic catalyst with friendly Fe 3+ /Fe 2+ cycling for environmental catalysis and provided new ideas for the treatment of PAEs wastewater.
✓ 已验证
产品关联
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yina Guan,Xiaojia Li,Tian Gao,Kai Zheng,Yukun Wang,Zelian Yu,Chunguang Liu
Engineered nanomaterials (NMs) have emerged as promising tools for improving agricultural sustainability. However, their dual capacity to restrict pollutant bioaccumulation while enhancing environmental remediation remains a challenge. In this study, we developed a novel Fe-Mo nanocomplex (Fe@Mo-5) that concurrently addresses both critical challenges in agro-environmental systems. Comprehensive characterization indicated that Fe@Mo-5 exhibited strong stability, high redox activity and excellent nanozyme-mimetic properties, formed protective film on the surface of lettuce ( Lactuca sativa L. ) roots. This barrier effectively reduced the uptake of multiple pollutants, including atrazine (ATZ), ibuprofen and bisphenol A. Notably, the accumulation of ATZ was decreased 60.7 % in roots and 65.7 % in edible leaves, while decreasing its translocation factor from 0.177 to 0.111, significantly lowering dietary exposure risks. Parallelly, Fe@Mo-5 actively participated in ATZ degradation by increasing removal efficiency by 42.5 %, with a safe concentration and sustained ROS generation that balanced efficient ATZ removal with minimal phytotoxicity. Additionally, the application of Fe@Mo-5 significantly improved lettuce growth parameters, including promoting biomass accumulation, photosynthesis and nitrogen metabolism without inducing oxidative damage. This work establishes a breakthrough nano-enabled strategy that synergistically combines crop protection with environmental remediation, offering a viable solution for sustainable agriculture and food safety in contaminated environments.
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Worku Lakew Kebede,Dong-Hau Kuo,Fekadu Tadesse Bekena,Lalisa Wakjira Duresa
Environmentally toxic organic pollutants, namely methylene blue (MB), neutral red (NR), Rhodamine B (RhB), and methyl orange (MO) dyes contain highly toxic, carcinogenic, non-biodegradable, and colored pigments which cause harm for humans and aquatic organisms even at low concentrations. To detoxify these toxic organic pollutants from the wastewater, the bimetallic solid solution-typed In–Mo(O,S) 2 catalyst with various indium (In) contents were synthesized at low temperature through a simple precipitation method. The morphological, structural, chemical compositions, electrochemical and optical properties of the catalysts were thoroughly characterized. The photodegradation performance of the In–Mo(O,S) 2 catalysts over the cationic, anionic and neutral dyes were studied under visible light irradiation. It has been observed that the photocatalytic activity was enhanced as In was added to the Mo(O,S) 2 catalyst, and In–Mo(O,S) 2 -20 was found to be the best composition to completely degrade four organic dyes. The dye degradation had rate constant values of 9.5 × 10 −2 min −1 , 6.3 × 10 −2 min −1 , 4.4 × 10 −2 min −1 , and 15.7 × 10 −1 min −1 for MB (20 ppm), NR (20 ppm), RhB (10 ppm), and MO (10 ppm) dyes, respectively. The active species for degradation of MB is different from those for RhB and MO. Single phase In–Mo(O,S) 2 -20 capable to degrade four kinds of dyes at a fast rate is a good photocatalyst.
✓ 已验证
DOI
高影响因子
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
·
2026
·Vol. 33
·期 11
·329
·
IF 4
Chen Xiao-Yu,Zhang Heng,Duan Hao-Dong,Pei Yan-Ling,Gong Sheng-Kai,Li Shu-Suo
A combined approach of electroless plating and vapor phase aluminizing was employed to deposit aluminized coatings with varying Co contents onto the surface of an Mo-rich Ni 3 Al-based single-crystal superalloy. The hot corrosion behavior of these coatings was comparatively investigated during exposure to 100 wt.% Na 2 SO 4 molten salt at 900 °C, revealing the underlying mechanisms. The results demonstrated that Co doping significantly enhanced the coating’s resistance to sulfur-induced hot corrosion. This improvement progressed with increasing Co content. Furthermore, Co doping effectively suppressed the outward diffusion of Mo from the alloy substrate. Notably, when the deposited Co layer thickness reached 5 μm, Mo diffusion was effectively confined within the interdiffusion zone. During the hot corrosion stage, the majority of Mo remained suppressed within the substrate core. This substantial reduction in Mo outward diffusion significantly improved the coating’s resistance to sulfur-induced hot corrosion. For coatings containing higher Co levels, a multi-layered structure formed within the surface oxide scale during hot corrosion: the outermost layer consisted of CoAl 2 O 4 , followed by an intermediate layer of Al 2 O 3 , and an inner layer comprising a mixture of CoAl 2 O 4 and Al 2 O 3 phases. This multi-layered configuration contributed to maintaining the integrity of the oxide scale and effectively suppressed the progression of hot corrosion.
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Haoran Yu,Changmin Liu,Shuo Liu,Yu Gu,Shuya Wang,Ali Yaraş,Linchao Hu,Wenyi Zhang,Mingguo Peng,Hasan Arslanoğlu,Linqiang Mao
Spent petroleum refining catalyst is regarded as the important secondary resource for valuable metals. However, common recycling strategies, including soda roasting, acid and alkaline solutions leaching and chemically precipitation, produced large quantities of high salinity wastewater. This study proposed an efficient method to recovery of Mo and Ni from the spent hydrodesulfurization (HDS) catalyst via O 2 -rich roasting and organic acid leaching with the advantage of less salinity wastewater production. The transformation of Mo(IV) into soluble Mo(VI) was enhanced by O 2 -rich atmosphere roasting, and 98.64% of Mo(IV) was oxidized at 650 ℃ for 2 h in atmosphere containing 30% of O 2 . The oxidation process of Mo(IV) was agreed with the shrinkage pore model, and regulated by surface reaction and internal diffusion. 97.97% of Mo(VI) was leached from roasted product by oxalic acid , separated with complexation extraction agent of Ala-TBP and recovered as (NH 4 ) 8 Mo 10 O 34 and (NH 4 ) 2 Mo 3 O 10 by evaporative crystallization. Ni was leached out from spent catalyst with 1 mol/L acetic acid, and precipitated as NiC 2 O 4 with oxalic acid . 95.92% of Mo and 96.77% of Ni were recovered from spent HDS catalyst with this recycling route. This study provided a high-efficient and eco-friendly method to recovery of valuable metals from spent catalyst.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）