ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Wei Li,Shu-ao He,Wei Xu,Xue-chuan Wang
In this paper, a series of BiOCl-Ag/AgBr heterojunctions supported by magnetic mesoporous silica microspheres with double cavity structure (RH-FSBA x ) were successfully synthesized. For the combination of double cavity structure and orderly mesoporous opening structure of magnetic mesoporous RH-FSBA x photoelectrocatalysts, they exhibited ultra-strong enriching property to targeted pollutants. For the formation of BiOCl-AgBr heterojunctions, superior photosensitization of AgBr and existence of metallic Ag plasmas with surface plasmon resonance (SPR) effect, the photoelectrocatalysts exhibited enhanced visible light photoelectrocatalytic performance. Furthermore, the photoelectrocatalyst can be recycled easily by magnetic separation for its superior magnetic response. Particularly, the magnetic mesoporous RH-FSBA 0.03 photoelectrocatalyst exhibited the highest photoelectrocatalytic activity (k = 1.3 × 10 −2 min −1 ) in degradation of acid fuchsin (AF) under visible light irradiation , and it was about 4 times of RH-FSB photoelectrocatalyst. Therefore, this novel photoelectrocatalyst can effectively decompose organic pollutants in water system under visible light irradiation by rapid enrichment and efficient photodegradation .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xueliang Liu,Qiusen Han,Yufei Zhang,Xinhuan Wang,Shuangfei Cai,Chen Wang,Rong Yang
We report a facile and green route to prepare ligand-free ultrafine rhodium (Rh) nanoparticles decorated on graphene oxide (GO) nanosheets. The ultrafine Rh nanoparticles with average size 1.8 ± 0.4 nm were synthesized by pulsed laser ablation in liquid. The Rh nanoparticles could be uniformly supported on the surface of GO through the electrostatic interaction. The reduction of 4-nitrophenol in presence of NaBH 4 was performed as a model reaction to evaluate the catalytic properties of Rh/GO nanocomposites. The Rh/GO nanocomposites showed remarkable high catalytic activities with rapid and complete conversion of 4-nitrophenol to 4-aminophenol. The kinetic constant rate of the Rh/GO nanocomposites was 7.62 × 10 −3 s −1 , which is 27 times higher than commercial Rh/C catalyst, revealing the high catalytic activity in catalytic hydrogenation. The Rh/GO nanocomposites showed good stability and high catalytic activity due to the small size Rh nanoparticles, uniformly dispersed on GO nanosheets. This work may provide a green and alternative method to prepare ligand-free supported ultrafine noble metal heterogeneous catalysis.
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 10
·105916
·
IF 1.449
Nuoya Wang,Xinhua Huang,Vincent Chan,Lei Zhang
Conducting polymer has emerged as an attractive class of photocatalyst for wastewater treatment under visible light and UV light irradiation. In our current work, two types of polypyrene microparticles (PPMSs) were tailored designed as a novel catalytic material for photocatalytic degradation of Rhodamine B (RhB) in aqueous solution. The degradation rate of RhB correlated with the effectiveness of respective photocatalytic processes was determined from the UV absorbance spectrum. Firstly, highly monodispersed PPMSs with an average diameter of around 1 μm were successfully synthesized from the emulsion co-polymerization of pyrene and chloromethyl methyl ether. Secondly, PPMSs remained to be chemically stable under various pH values in the solution. Moreover, the degradation rate of the types of PPMSs at different pHs values ranged from 63.2% to 98.43%. Interestingly, the degradation efficiency of PPMSs under acidic conditions (pH < 6) decreased with the increase of pH while it increased with the increase of pH under alkaline conditions (pH > 9). The degradation efficiency reached a peak under pH 7.0. Overall, PMMSs which possessed high chemical resistance against strong acid or base and high photocatalytic activities for the degradation of model organic pollutants under various pHs would provide a new alternative for wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Materials Today Nano
·
2026
·
IF 7.6
Li Li,Yang Zhang,Yuhui Chen,Jinting Hao,Mingzi Chen,Ying Jiang,Huagui Yang,Yong Wang
STEM and EELS identify the atomic SrTiO 3 surface and Rh precursor layer. • Rh precursor evolution and nanoparticle formation were in situ tracked. • UV light triggers anisotropic Rh growth onSrTiO 3 . Elucidating the complex light-matter interplay and the resulting atomic and electronic structural changes is fundamental to mastering light-driven surface processes. However, direct in situ observations capturing these dynamic pathways at the atomic scale remain limited, particularly for facet-engineered materials with intrinsic anisotropy. Here, using in situ transmission electron microscopy (TEM) with integrated illumination, we provide direct evidence of the transition from isotropic Rh precursor to anisotropic growth of Rh nanoparticles on faceted SrTiO 3 nanocrystals. While thermal decomposition in the dark leads to a homogeneous distribution of Rh across both {100} and {111} facets, UV irradiation induces a significant shift toward facet-selective growth, with Rh nanoparticles preferentially nucleating and expanding on the {100} facets. The anisotropic work functions of the SrTiO 3 facets, coupled with the interfacial electronic modulation of Rh-SrTiO 3 Schottky junctions, facilitate site-selective Rh precursor reduction and enhanced growth on the {100} surfaces. Moreover, the synergistic photo-thermal effect drives the subsequent evolution of Rh nanoparticles, which predominantly coarsen through an Ostwald ripening mechanism. These findings provide direct experimental evidence of light-driven, facet-dependent nanostructure evolution and offer insights into the role of carrier regulation in the rational design of photocatalytic systems.
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Huixin Wu,Jinghao Fan,Liang Wang,Hai Wang
Selective ammoxidation of sp 3 -hybridized C-H bonds is very important in the pharmaceutical and fine-chemical industries. However, simultaneous activation of the C-H bond and ammonia is difficult due to the competitive adsorption of ammonia and hydrocarbons on metal sites, which poisons the catalyst. In this study, we report an atomically dispersed rhodium (Rh) catalyst supported on manganese oxide nanorod that exhibited high activity and selectivity for the C-H bond ammoxidation under mild reaction conditions, outperforming the conventional supported metal catalysts and homogeneous manganese catalysts under the equivalent conditions. Mechanistic studies reveal that the manganese oxide nanorod with potassium ions in the tunnels significantly hindered the ammonia poisoning to Rh, providing free Rh sites for C-H bond activation and enhancing the ammonia-resistance of the catalyst. This work provides an opportunity to improve the efficiency of industrially important reactions that suffer from catalyst deactivation due to surface poisoning.
研究领域:
催化化学
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材料化学
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有机合成
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多相催化
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可持续化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yalin Yang,Wei Lu,Xiaolong Yang,Lyuzhou Ye
A ternary CABB/CdS–Rh heterojunction with Type-I band alignment and Rh electron trapping for synergistic charge separation. • DFT-Bader analysis quantifies Rh-induced charge redistribution, with net charge increased from 0.20 to 0.30 |e|. • CABB/CdS-Rh yields 49.15 mmol·g -1 ·h -1 H 2 (STH 0.19%) with tunable selectivity for acetaldehyde/acetal. Photocatalytic direct dehydrogenation of ethanol remains critically constrained by the narrow visible-light response and inefficient charge carrier separation of conventional photocatalysts. Herein, a Rh-modified Cs 2 AgBiBr 6 /CdS heterojunction is fabricated for coupled ethanol dehydrogenation, H 2 production and acetal generation under mild conditions. Density Functional Theory (DFT) calculations validate the tailored charge transfer behavior via Bader charge and differential charge density analyses. Bader charge analysis shows that Rh incorporation increases the interfacial net charge variation from 0.20 |e| to 0.30 |e| and introduces a local variation of 0.42 |e| around Rh sites, thereby suppressing charge recombination and promoting carrier separation. Control experiments confirm that 1D CdS nanorods deliver better charge transport than 2D CdS nanosheets, and surface cocatalyst anchoring is indispensable for efficient hydrogen evolution. Rh outperforms other tested metals (Pd, Pt, Au, Ni), achieving an H 2 evolution rate of 49.15 mmol·g −1 ·h −1 (20.24-fold that of CABB/CdS) and Solar-to-Hydrogen (STH) efficiency of 0.19%. Rh modification tunes liquid-phase product distribution, and the catalyst shows broad alcohol substrate adaptability and robust cycling stability. The synergistic heterojunction engineering and cocatalyst modification strategy presented in this work offers a promising catalyst design paradigm for the valorization of biomass-derived alcohols via photocatalytic conversion. A CABB/CdS-Rh heterojunction photocatalyst is constructed for visible-light-driven ethanol dehydrogenation. The reinforced interfacial charge redistribution, together with the Rh electron-trapping centers, effectively suppresses charge recombination, achieving efficient H 2 production of 49.15 mmol·g −1 ·h −1 with an STH EtOH efficiency of 0.19%. Systematic screening identifies Rh as the optimal cocatalyst, and the catalyst exhibits broad substrate adaptability toward various alcohols, including benzyl alcohol, cyclohexanol, and n-pentanol. This integrated design offers a versatile strategy for the dual valorization of biomass-derived alcohols into H 2 fuel and valuable chemicals. Download: Download high-res image (127KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 23
·18145-18153
·
IF 2.019
Hao Meifeng,Fa Dejuan,Qian Lihong,Miao Yuqing
By one step hydrothermal reaction, the ultrafine nanoparticles of Bi 2 WO 6 /NiWO 4 were prepared with the particle size smaller than 5 nm. They dispersed very well in solution and exhibited excellent photocatalytic efficiency for the degradation of Rhodamine under visible light, UV light and natural solar light respectively. Under visible light irradiation for 30 min, the model dye Rhodamine B (Rh B) nearly completely degraded. For natural solar light irradiation, only 10 min observed the complete degradation of Rh B. This provides new nanocomposites for efficient photo-driven degradation of organic dyes under visible or natural solar light irradiation.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2015
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IF 1.964
Xiaoming Zhang,Shengmei Lu,Mingmei Zhong,Yaopeng Zhao,Qihua Yang
Rh-PPh 3 -polymer@mesosilica composites were prepared by the polymerization of mixtures of divinylbenzene (DVB) and 4-vinyl-triphenylphosphine monomer in the nanopores of mesoporous silicas followed by coordination with Rh(acac)(CO) 2 (acac =acetylacetonate). These catalysts were characterized by XRD, N 2 sorption , TEM, FT-IR, and TG, and could efficiently catalyze the hydroformylation of 1-octene with higher activity than a pure polymer catalyst because of their high surface area and large pore volume, which were beneficial for the exposure of active sites and mass transport. Through the control of pore size and pore connectivity by using different mesoporous silica (MCM-41, SBA-15, and FDU-12), the activity and selectivity can be controlled. Rh-PPh 3 -polymer@FDU-12 with a cage-like mesostrucuture showed lower activity but slightly higher selectivity than the catalyst with a 2-D hexagonal mesostructure (Rh-PPh 3 -polymer@SBA-15 or Rh-PPh 3 -polymer@MCM-41). By varying the polymer content in the nanopores of the mesosilica, the activity and selectivity (92%–96%) can also be tuned. The solid composite catalyst can be recycled without loss of activity, but a decrease in selectivity was observed.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 11
·2978-2984
·
IF 5.106
Yuanmeng Zhao,Chenlu Yang,Guixiang Mao,Jun Su,Gongzhen Cheng,Wei Luo
The development of highly efficient and stable electrocatalysts for the hydrogen evolution reaction (HER) under alkaline media is of great importance due to its sluggish water dissociation kinetics. In this work, ultrafine Rh nanoparticle decorated MoSe2 nanoflowers have been synthesized through a colloidal synthetic method. When further used as electrocatalysts for HER in alkaline media, the experimental results demonstrate that 8.2% Rh–MoSe2 nanoflowers exhibit excellent catalytic activity with a small overpotential of 73 mV to obtain the current density of 10 mA cm−2 with good stability, which is much higher than that of MoSe2 (264 mV) and even close to 20% commercial Pt/C (48 mV). The improved HER performance of Rh–MoSe2 nanoflowers may be ascribed to the synergistic catalytic effects between Rh and MoSe2 and strong electronic interactions among Rh, Mo and Se at the atomic level.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Weifeng Chen,Guo Lv,Jinrun Fu,Haiyan Ren,Jialu Shen,Jie Cao,Xiang Liu
Achieving the controlled release of H2 through an effective approach still faces many challenges. Herein, high-quality graphene quantum dots (GQDs) are synthesized from a new precursor, 1,2,4-trihydroxy benzene, and a multifunctional platform of Rh@GQDs is further developed for the controlled H2 evolution upon the hydrolysis of NH3BH3 (AB). More importantly, the designing concepts of multistep and stepless speed controls have been introduced in the domains of both H2 evolution for the first time. Through a novel designing protocol, the rate of H2 evolution can be freely regulated and constantly varied on demand by means of chelation between Zn2+ and ethylene diamine tetraacetic acid (EDTA). The density functional theory calculation indicates that Zn2+ has the priority to be adsorbed onto Rh(100) due to its larger adsorption energy (107.98 kcal·mol–1) than that of AB (36.36 kcal·mol–1). A controlling mechanism is presented such that Zn2+ will cover the active sites of the nanocatalyst to prevent the H2 evolution, and EDTA can chelate Zn2+ to reactivate the nanocatalyst for the production of H2, greatly facilitating use of this strategy in other catalytic reactions. Moreover, it is demonstrated that the protocol is equally valid for diverse hydrogen storage materials. Therefore, this work not only establishes whole new concepts for the controlled production of H2 but also explains their mechanism, thus remarkably advancing the utilization of H2 energy and significantly enlightening the controlled process of catalysis.
研究领域:
材料科学
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催化化学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Hongjing Wang,Qiqi Mao,Hongjie Yu,Shengqi Wang,You Xu,Xiaonian Li,Ziqiang Wang,Liang Wang
Electrocatalysis nitrogen reduction reaction (NRR) is expected to achieve sustainable clean and sustainable NH 3 production. Owing to the chemical inertness of N 2 , the design of efficient catalysts is a critical issue. In this work, we propose micelle-assisted replacement method to in situ synthesize mesoporous Au 3 Rh film on Ni foam (mAu 3 Rh/NF). Because of the bimetallic mesoporous and binder-free structures, mAu 3 Rh/NF obtains high Faraday efficiency of 23.84% and NH 3 yield of 26.29 μg h −1 mg -1 cat. for NRR in 0.1 M Na 2 SO 4 at − 0.1 V, outperforming other counterparts with different Au/Rh ratios. This micelle-assisted synthesis method is universal to synthesize high-efficiency mesoporous noble films for NRR and beyond.
研究领域:
材料科学
·
电化学
·
催化
·
可持续化学
✓ 已验证
产品关联
DOI
高影响因子
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
·
2023
·
IF 1.2
He Yuntao,Guo Xiaxin,Qiao Luyang,Ye Runping,Zong Shanshan,Cao Xinyi,Cheng Jiankai,Zhou Zhangfeng,Yao Yuangen
Rh complexes are considered as the most promising catalysts for formaldehyde hydroformylation since they can achieve higher yields of glycolaldehyde under mild conditions. Although heterogeneous catalysts are convenient to separate, Rh-based heterogeneous catalysts usually have limited catalytic activity in hydroformylation of formaldehyde. Here, four different supports (Al 2 O 3 , SiO 2 , SBA-15 and HMS), loaded with Rh by impregnation method, have been developed for formaldehyde hydroformylation. The physico-chemical properties of the materials have been investigated by means of complementary techniques. Due to the presence of more oxidized rhodium species and stronger metal support interactions, the silica-based catalysts achieved higher formaldehyde conversion and glycolaldehyde selectivity than Rh/Al 2 O 3 . Moreover, SBA-15 and HMS zeolites were synthesized by adjusting the structure of the silica support. Thus, the selectivity of 94.8% for glycolaldehyde and a remarkable glycolaldehyde yield of 52.7% over Rh/SBA-15 catalyst was obtained due to its larger surface area, suitable pore structures and higher dispersion of Rh species.
研究领域:
化学工程
·
催化材料科学
✓ 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）