Article
Chemistry, Multidisciplinary
Zhiqiang Wang, Wangzhu Cao, Kunfeng Chen, Dongfeng Xue
Summary: Uniform size and shape of nanomaterials are crucial for their applications in various fields. By optimizing temperature conditions, Cu2O rhombic dodecahedra with specific dimensions can be synthesized, showing higher capacity as lithium ion battery anodes compared to cubes and octahedra.
Article
Materials Science, Multidisciplinary
Chien-Hsuan Hsiao, Chun-Wei Chen, Hsiang-Sheng Chen, Pei-Lun Hsieh, Yi-An Chen, Michael H. Huang
Summary: Aqueous solution of cadmium acetate, thioacetamide, and nitric acid was used to synthesize {110}-bound CdS rhombic dodecahedra with tunable sizes. These particles exhibit red-shift in absorption and emission bands with increasing size, while their band gaps decrease. Conductivity measurements show {110} faces of CdS are barely conductive.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Shang-Ju Chan, Jui-Cheng Kao, Po-Jung Chou, Yu-Chieh Lo, Jyh-Pin Chou, Michael H. Huang
Summary: Research has shown that functionalized Cu2O crystals exhibit significantly improved photocatalytic activity. The modified Cu2O surfaces have good electron transfer properties and can generate hydroxyl radicals, enhancing the efficiency of the photocatalytic reactions.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Po-Jung Chou, Wei-Yang Yu, Jui-Cheng Kao, Yu-Chieh Lo, Jyh-Pin Chou, Michael H. Huang
Summary: Surface functionalization of Cu2O cubes with 4-cyanophenylacetylene (4-CNA) enhances their photocatalytic activity. Rhombic dodecahedra also show significant activity enhancement, while decorated octahedra exhibit only moderate improvement. Holes play a more crucial role than electrons in the photocatalytic activity of 4-CNA-modified Cu2O cubes.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Peng Wang, Xibin Zhou, Yu Shao, Danzhen Li, Zhongfu Zuo, Xuezheng Liu
Summary: The study successfully synthesized CdS quantum dots-decorated InOOH and demonstrated their excellent activity and stability in photocatalytic reduction of nitro aromatics. It sheds light on the development of novel visible light photocatalysts for efficient reduction of nitro aromatics.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Environmental Sciences
Alvin Lim Teik Zheng, Sarah Sabidi, Teruhisa Ohno, Toshinari Maeda, Yoshito Andou
Summary: The study introduces a novel 3D photocatalyst prepared through hydrothermal treatment and freeze-drying, showing enhanced photocatalytic activity for methyl orange degradation and excellent antibacterial activity. The synergistic effect of Cu2O/TiO2 anchored on the CNF/rGH framework plays a key role in improving the performance of the photocatalyst.
Article
Chemistry, Physical
Lufang Fan, Jiahui Han, Kai Wei, Changchang Ma, Sheng Feng, Yun Zhou, Xiaojun Dai, Zhiwei Ye, Yang Wang
Summary: This study aimed to enhance the reduction ability of CdS by substituting it with Mn2+ and forming an S-scheme heterojunction with Cu2O. By equilibrating the Fermi level, the MnCdS/Cu2O heterojunction facilitated the recombination of electrons and holes, resulting in robust photocatalytic hydrogen evolution. The MnCdS/Cu2O exhibited a significantly higher photocatalytic hydrogen evolution rate than pure MnCdS and Cu2O.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jyoti Rawat, Himani Sharma, Charu Dwivedi
Summary: In this study, Boron Nitride Quantum Dots (BNQDs) were synthesized and BNQDs decorated TiO2 nanograss (BNQDs/TiO2 NG) was successfully prepared using the hydrothermal method. The BNQDs/TiO2 NG exhibited higher thermal conductivity and good photocatalytic degradation performance.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Jaspal Singh, Subhavna Juneja, R. K. Soni, Jaydeep Bhattacharya
Summary: Metal free heterojunctions, like the CuO-Cu2O nanorods/TiO2 nanoparticles heterostructures synthesized in this study, show promising potential as low-cost photocatalysts. These heterojunctions have superior sunlight-induced photodegradation activity and can effectively remediate toxic wastewater.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yufu Zhu, Jiaying Yan, Lei Zhou, Liangdong Feng
Summary: This paper demonstrates the synthesis of rhombic ZnO microrods surrounded by ZnO nanorods on zinc foils using a hydrothermal method. Photocatalytic degradation of Rhodamine B solution was employed to evaluate the photocatalytic performance of the fabricated samples. The hierarchical micro/nanostructures formed by ZnO nanorods surrounding the surfaces of rhombic ZnO microrods exhibited superior photocatalytic performance compared to rhombic Zn(OH)F and ZnO microrods. The enhanced performance can be attributed to the larger surface area of the hierarchical ZnO micro/nanostructures. Additionally, the ZnO nanorods grown on the rhombic ZnO microrods demonstrated recyclability and relatively stable photocatalytic performance.
Article
Chemistry, Multidisciplinary
Zezhi Shan, Yanrong Yang, Haoran Shi, Jiali Zhu, Xiao Tan, Yi Luan, Zhenqi Jiang, Ping Wang, Jieling Qin
Summary: Graphene oxide-cuprous oxide (GO-Cu2O) nanocomposites with different morphologies were prepared for photocatalytic degradation of organic/inorganic dyes and bactericidal effect against pathogenic bacteria under visible light. The hollow dodecahedra morphology of GO-Cu2O exhibited higher absorption and degradation efficiency compared to solid cube morphology, showing excellent antibacterial effect against pathogenic bacteria. The possible mechanism for the enhanced visible-light photocatalytic and antibacterial efficiencies of the dodecahedra morphology was investigated.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yanqing Cong, Xiang Chen, Wanxing Wang, Shi-Wen Lv
Summary: The photocatalytic technique using CdS nanoparticles decorated COF-based photocatalyst TpMA showed enhanced optical absorbability and effective inhibition of recombination of photogenerated electrons and holes, leading to excellent photocatalytic activity in activating persulfate to produce SO4- and OH under visible light irradiation. The 25% CdS@TpMA composite exhibited the best degradation ability for diclofenac sodium, tetracycline, and ibuprofen, with TOC removal efficiencies over 60% and great performance and structural stabilities. Furthermore, a possible photocatalytic mechanism was proposed, providing a promising candidate for degrading drug residues and novel viewpoints for further research.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Huaiwei Zhang, Yifan Chen, Liang Bao, Jing-yuan Ge
Summary: A Z-scheme heterojunction with all-solid-state structures was constructed, in which carbon dots acted as electron transferring mediators. The modified photocatalysts showed significantly higher activities, with ammonia production rates reaching above 232 lmol center dot gcal-1 center dot h-1 under light irradiation. The improved catalytic properties were attributed to the increased number of photoinduced oxygen vacancies, excellent visible-light adsorption abilities, and efficient photogenerated electron-hole separation efficiencies for the carbon dots bridged heterostructures. This study provides reasonable guidance for applications in photocatalytic ammonia synthesis and a promising construction strategy for efficient Z-scheme photocatalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Diyong Tang, Desheng Xu, Zhipeng Luo, Jun Ke, Yuan Zhou, Lizhong Li, Jie Sun
Summary: In this study, an efficient S-scheme heterojunction was successfully constructed by coupling flower-like hierarchical structure of Bi2WO6 and Cu2O quantum dots, which enhanced the migration efficiency of photogenerated charge carriers and improved the photocatalytic activity.
Article
Energy & Fuels
Siqi Qiu, Renbo Guo, Qingyu Wang, Feng Yang, Yibo Han, Xiaoniu Peng, Hui Yuan, Xina Wang
Summary: The combination of P-type Ni(OH)(2) with n-type CdS nanorods and nanocrystals has enhanced the photocatalytic property due to the p-n junction. By controlling the reaction between Ni2+ and OH- through changing the irradiation time of CdS, efficient photocatalytic H-2 generation was achieved with Ni(OH)(2) nanoparticles deposited on CdS ultrathin nanoflakes. The enhancement in carrier separation and transfer, as well as band gap narrowing, led to an optimum H-2 generation of 20.14 mmol/g/h, nearly three times of pure CdS.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Zih-Lin Yang, Gautam Kumar, Michael H. Huang
Summary: CdSe nanocrystals with different sizes were synthesized under different experimental conditions, leading to products with different sizes and properties. The crystal structure, optical properties, and electrochemical properties of the nanocrystals were systematically studied.
Article
Chemistry, Multidisciplinary
Yun-Wen Peng, Chia-Peng Wang, Gautam Kumar, Pei-Lun Hsieh, Chia-Min Hsieh, Michael H. Huang
Summary: In this study, cubic and edge-truncated cuboid CsPbCl3 nanocrystals were synthesized by simply mixing CsCl, PbCl2, and SDS in DMSO and transferring the mixture to toluene. The addition of DDAC surfactant led to a significant enhancement in the emission intensity. This research provides a green reaction method for the synthesis of cesium lead halide crystals with tunable shapes.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Anindya Sundar Patra, Jui-Cheng Kao, Shang-Ju Chan, Po-Jung Chou, Jyh-Pin Chou, Yu-Chieh Lo, Michael H. Huang
Summary: Binding of molecules to Cu2O cubes activates or enhances their photocatalytic activity and improves charge transfer. The catalytic performance varies with different crystal facets of the Cu2O cubes after functionalization.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Jing-Wei Chen, Arnab Pal, Bo-Hao Chen, Gautam Kumar, Subhodeep Chatterjee, Kiran Peringeth, Zong-Hong Lin, Michael H. H. Huang
Summary: This study successfully synthesizes various forms of BaTiO3, including octahedra, edge- and corner-truncated cubes, and cubes with four tunable sizes. Acetic acid treatment removes BaCO3 impurities, and Rietveld refinement confirms the crystal structure is tetragonal. The crystals' physical properties vary with their size and facet. BaTiO3 octahedra exhibit better performance than truncated cubes and cubes, especially in piezoelectric nanogenerators.
Article
Nanoscience & Nanotechnology
Mu-Han Hsieh, Zhe-Hong Su, Er-Ting Wu, Michael H. Huang
Summary: Cu2O rhombic dodecahedra and cubes functionalized with 4-nitrophenylacetylene were used as photocatalysts for the oxidation of aryl sulfides to produce aryl sulfoxides. Under the supply of oxygen and blue LED light, the reaction could be completed in 12 hours in a water and methanol mixed solution. High product yields and excellent selectivity for sulfoxides over sulfones were achieved, with a thioanisole to methyl phenyl sulfoxide yield of 98%. Mechanistic study revealed the involvement of photogenerated electrons, holes, and superoxide radicals in the oxidation reaction. The simple preparation of the photocatalyst and molecular functionalization demonstrate the effectiveness of surface-controlled ionic solids as photocatalysts for organic transformations.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Zhe-Hong Su, Mu-Han Hsieh, Zong-Li Chen, Wan-Ting Dai, Er-Ting Wu, Michael H. Huang
Summary: The high photocatalytic activity of Cu2O rhombic dodecahedra bounded by {110} surfaces indicates their potential in catalyzing organic transformations using photogenerated electrons, holes, and radicals. Compared to other shapes of Cu2O particles, Cu2O rhombic dodecahedra show the best photocatalytic hydroxylation yield for the conversion of 4-methoxyphenylboronic acid to 4-methoxyphenol in water and at room temperature. The presence of a hole acceptor and surface control also play important roles in the catalyst performance.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Chien-Kai Chen, Bo-Hao Chen, Michael H. Huang
Summary: Rock salt-phase MnS nanocubes with tunable sizes exhibit facet-dependent optical and electrical conductivity behaviors and magnetic properties. The surface lattice significantly affects the properties of the MnS crystals.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Er-Ting Wu, Michael H. Huang
Summary: Functionalized Cu2O rhombic dodecahedra with 4-nitrophenylacetylene (4-NA) are effective photocatalysts for oxidative amine coupling reactions, achieving high product yields under light irradiation.
Article
Materials Science, Multidisciplinary
Hsueh-Heng Ma, Michael H. Huang
Summary: Cu2O crystals of different sizes and facets were synthesized and their photoelectrochemical (PEC) activities were compared. Cubes exhibited the highest photon-to-current efficiency under front-side illumination, while octahedra had the lowest charge transfer resistance but weak photosensitivity. Rhombic dodecahedra showed hindered hole transport but greatly enhanced photocurrent under back-side illumination. Cuboctahedra with {100} and {111} faces had intermediate PEC responses. The PEC performance correlated strongly with the exposed faces but not with the band diagrams.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Gautam Kumar, Zong-Li Chen, Satyaranjan Jena, Michael H. Huang
Summary: Transparent {100} and {111} SrTiO3 wafers have visible color differences, different absorption spectra, and band gaps of 3.04 and 3.06 eV for the {100} and {111} wafers, respectively. The {110} side faces of these wafers are exposed for electrical conductivity measurements, and the {111} face is more conductive than the {110} face, while the {100} face has the lowest conductivity. The wafers can potentially be used to fabricate transistors utilizing the electrical facet effect.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Zong-Li Chen, Michael H. Huang
Summary: Different morphologies of SrTiO3 crystals exhibit varied optical behaviors. Among them, {100}-truncated rhombic dodecahedra show superior photocatalytic activity with high reaction yield. These perovskite crystals are affordable and easy to synthesize, making them attractive photocatalysts for other organic transformations.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Gautam Kumar, Chong-Rui Chen, Bo-Hao Chen, Jing-Wei Chen, Michael H. Huang
Summary: CdO stellated octahedra, octahedra, {100}-truncated octahedra, and Cd(OH)(2) hexagonal plates were synthesized by increasing cadmium acetate and KOH amounts in ethanol and heating at 150°C for 2 hours. The evolution in particle shape is attributed to changes in free energy, with all samples exhibiting high crystal quality.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Gautam Kumar, Jing-Wei Chen, Hsueh-Heng Ma, Xing-Fu Huang, Michael H. Huang
Summary: This study investigates the conductivity and emission properties of Intrinsic {0001} 4H-SiC wafer on different crystal surfaces. The results show that the {0001} face has higher conductivity and emission intensity, while the {1010} face has lower values. Novel transistors can be fabricated using the {0001}/{1010} facet combination. Additionally, the SiC wafer exhibits clear photoconductivity properties.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Shang-Ju Chan, Jui-Cheng Kao, Po-Jung Chou, Yu-Chieh Lo, Jyh-Pin Chou, Michael H. Huang
Summary: Research has shown that functionalized Cu2O crystals exhibit significantly improved photocatalytic activity. The modified Cu2O surfaces have good electron transfer properties and can generate hydroxyl radicals, enhancing the efficiency of the photocatalytic reactions.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Chih-Shan Tan, Michael H. Huang
Summary: Density functional theory calculations reveal that GaN crystals with different numbers of layers and different crystal planes exhibit distinct band structures and bond lengths. These findings suggest that surface layer structural deviations may influence the properties of materials.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)