Article
Chemistry, Multidisciplinary
Jie Gao, Shengqi Zhang, Xiaoqing Ma, Yi Sun, Xiaoyan Zhang
Summary: Introducing antimonene onto TiO2 nanorod arrays improves the photoelectric conversion efficiency and photocurrent density.
Article
Chemistry, Physical
Pujia Cheng, Wenjing Lv, Zhili Shi, Kaidong Zhan, Yaqi Liu, Quinn Qiao, Fan Wu
Summary: The photocurrent output of the C6H4NH2CuBr2I/TiO2 heterojunction photoelectrode is super stable in an aqueous solution for 30,000 seconds but is extremely weak. The electron transfer is not fast enough to compete with charge recombination due to short diffusion length, resulting in low photocurrent. However, the use of a small reverse electric field significantly improves charge separation and transfer efficiency, leading to enhanced photocurrent.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Xiangli An, Bowen Zhang, Chongyang Wang, Zhiyong Zhao, Saisai Zhang, Hari Bala, Zhanying Zhang
Summary: Highly regular TiO2 nanorod array films were synthesized in situ on FTO using a simple hydrothermal method, and ZnO shell layers were grown on the nanorods to form a core-shell structure. The TiO2/ZnO nanocomposites showed enhanced ethanol sensing performances compared to TiO2 nanorods, with a low working temperature, higher sensitivity, and faster response capability. The optimum sensor based on 2c-TiO2/ZnO exhibited a significantly higher response to 50 x 10-6 C2H5OH at 340°C compared to the TiO2 sensor. The improved ethanol sensing mechanism was attributed to the unique nanorod array structure and the heterojunctions between TiO2 and ZnO.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Multidisciplinary
Xiaobing Wang, Yihao Zhang, Yu Cao, Zhi Zheng, Xiaowei Guo, Jiabao Cui, Xiangdong Lou, Yuming Guo, Huijun Liang, Zhansheng Lu, Lin Yang, Hua Zhang, Xiaoming Ma
Summary: The novel tufted nanoneedle embedded localized microsphere (TELM) nanoarchitecture has been proposed and successfully synthesized. The TELM is composed of tufted rutile TiO2 nanoneedles embedded on the localized surface of anatase TiO2 microspheres (TiO2-TELM). The decay lifetime of photogenerated charge carriers (PCCs) in TiO2-TELM is significantly prolonged compared to pure rutile and anatase TiO2, and the TiO2-TELM with 1 wt% Pd loading achieves an ultrahigh H-2 production rate in pure water. Moreover, the photogenerated electrons and holes in TiO2-TELM migrate towards the rutile and anatase phases of TiO2, respectively. This study provides an effective strategy for the rational design and controlled synthesis of nanoarchitectures.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xue Chen, Biyi Chen, Dan Li, Longhua Li, Dongbo Xu, Weidong Shi
Summary: In this study, Indium (In) ions were successfully diffused into a TiO2 photoelectrode via a flame doping method, resulting in improved photo-induced carrier separation and enhanced photoelectrochemical performance. The relationship between dopant concentration and PEC performance showed a volcano-type pattern.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Shangrong Chen, Yang Peng, Changlin Li, Zhongyu Hou
Summary: The cascade structure of TiO2/CdS/CdSe semiconductor heterojunction, synthesized by a three-step hydrothermal growth technique, enhances photo-electrochemical performances by enlarging the absorption range of solar spectra, improving the properties of photogenerated charge carriers, and reducing interface resistance. The increase in hydrothermal growth time of CdSe leads to greater photoelectrochemical water splitting performances. The underlying physics mechanisms are discussed based on the formation of a type-II energy band alignment structure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Mi-Ra Kim, Thanh Chung Pham, Hyun-Seock Yang, Sung Heum Park, Seah Yang, Myeongkee Park, Sang Gil Lee, Songyi Lee
Summary: In this study, three types of TiO2 photoelectrodes were fabricated and evaluated for the dye-sensitized solar cells using synthesized organic photosensitizers. The double-layered nanoporous TiO2 photoelectrode showed the highest efficiency, compared to the single-layered nanoporous TiO2 photoelectrodes. The relationship between photovoltaic effects and interfacial resistance characteristics could be interpreted from impedance analysis.
Article
Chemistry, Physical
Bowen Zhang, Xiangli An, Saisai Zhang, Chongyang Wang, Zhiyong Zhao, Hari Bala, Zhanying Zhang
Summary: In this study, a highly regular array of TiO2 nanorods was prepared on FTO by a modified in situ hydrothermal method, followed by the growth of a uniform SnO2 layer on the nanorods to form a core-shell nanocomposite through an ion-layer adsorption-reaction process. The TiO2/SnO2 sensors exhibited improved gas sensing performance compared to TiO2 sensors, including higher sensitivity to ethanol, lower working temperature, and better long-term stability. The highest ethanol response was achieved when the growth cycle of the SnO2 shell was two times. The gas-sensing mechanism of the TiO2/SnO2 nanocomposites was attributed to their unique core-shell structure and the heterojunction between TiO2 and SnO2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Correction
Chemistry, Physical
Nurul Affiqah Arzaee, Nuttapon Yodsin, Habib Ullah, Sabiha Sultana, Mohamad Firdaus Mohamad Noh, Ahmad Wafi Mahmood Zuhdi, Abd Rashid Bin Mohd Yusoff, Siriporn Jungsuttiwong, Mohd Asri Mat Teridi
Summary: This study focuses on the effect of charge transfer from rutile to anatase on the hydrogen evolution reaction performance of anatase-rutile TiO2 heterojunction.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yanyan Li, Ruiming Li, Zhenglin Jia, Bin Yu, Yujie Yang, Songxue Bai, Michael Pollard, Yong Liu, Ye Ma, Henner Kampwerth, Qianqian Lin
Summary: Antimony-based chalcogenides, particularly binary Sb2S3 thin films, have shown great potential for optoelectronic applications due to their easy fabrication, low cost, decent charge transport and superior stability. In this work, Ag ions were introduced to the Sb2S3 sol-gel precursors, resulting in enhanced crystallinity and charge transport properties, leading to improved performance of Sb2S3 solar cells.
Article
Chemistry, Multidisciplinary
Muhammad Saleem, Ali Algahtani, Saif Ur Rehman, Muhammad Sufyan Javed, Kashif Irshad, Hafiz Muhammad Ali, Muhammad Zeeshan Malik, Amjad Ali, Vineet Tirth, Saiful Islam
Summary: The doping of Cu and Sm in ZnO nanorod arrays can enhance their structural, optical, and photovoltaic properties, leading to improved efficiency of dye-sensitized solar cells. The diameter of the nanorods is dependent on the concentration of Cu and Sm, while the density of the nanorod arrays remains relatively constant.
Article
Nanoscience & Nanotechnology
Asif Iqbal, Andreas Kafizas, Carlos Sotelo-Vazquez, Rachel Wilson, Min Ling, Alaric Taylor, Chris Blackman, Kirk Bevan, Ivan Parkin, Raul Quesada-Cabrera
Summary: Recent studies have shown that nanostructured core-shell WO3/TiO2 (WT) heterojunctions can efficiently degrade organic pollutants, with significantly enhanced electron and hole recombination lifetimes and effective transfer between WO3 and TiO2. The combination of theoretical calculations and experimental measures provides insights into the superior photocatalytic efficiency and critical charge transfer processes in this model heterojunction photocatalyst.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Lijie Duan, Haifeng Zhu, Ming Li, Xingyu Zhao, Yankun Wang, Yaping Zhang, Lianqing Yu
Summary: The study demonstrates that two-dimensional semiconductor MoSeS combined with TiO2 nanotube arrays exhibit highly efficient photocatalytic H-2 generation. The MoSeS/TiO2 heterojunction prepared by one-step atom substitution method shows superior photocatalytic performance compared to the two-step method. The composites not only reduce charge transfer resistance and accelerate carrier transport, but also improve visible light utilization efficiency with an obvious redshift in UV-vis absorption spectra.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Xidong Zhang, Yamei Zeng, Wenyan Shi, Zui Tao, Jianjun Liao, Changzhi Ai, Hewei Si, Zhipeng Wang, Adrian C. Fisher, Shiwei Lin
Summary: This study demonstrates the construction of high-performance S-scheme heterojunctions 2H-MoSe2/TiO2 NRAs and (1 T-2H)-MoSe2/TiO2 NRAs for efficient photoelectrocatalytic generation of H2O2. Experimental results show a 3.3-fold increase in H2O2 production rate for the former and a 4.7-fold enhancement for the latter biphasic interface. The 1 T metallic MoSe2 plays a crucial role as a charge carrier transfer bridge in promoting S-type charge transportation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Sheng Jiang, Shaobing Xiong, Hongbo Wu, Dongyang Zhao, Xiaomeng You, Yehui Xu, Menghui Jia, Wei Bai, Zaifei Ma, Xianjie Liu, Yefeng Yao, Zhenrong Sun, Qinye Bao
Summary: A surface treatment strategy is developed by heat-induced decomposition of a thin interlayer 2,7-Naphthaleneditriflate (NAP) to in situ reconstruct perovskite energetics. This strategy enhances charge extraction and suppresses charge recombination, resulting in a significantly improved power conversion efficiency of perovskite solar cells (PSCs). The reconstructed surface also improves the crystallinity and stability of the perovskite film, making it a promising approach for the design of high-efficiency and stable PSCs.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jung Sug Hong, Hee Jung Kim, Chang Hwun Sohn, Oh Yeong Gong, Jin Hyuk Choi, Kang Hee Cho, Gill Sang Han, Ki Tae Nam, Hyun Suk Jung
Summary: This study reports a novel synthesis of whitlockite and its application as a high-performing Pb2+ absorbent. The synthesized biomineral exhibits excellent Pb2+ absorption capacity and the absorbed Pb2+ ions can be recycled for the fabrication of perovskite solar cells.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Dehao Yu, Xiao Xiao, Cyrus Shokoohi, Yanxin Wang, Liyue Sun, Zhaoge Juan, Matt J. J. Kipper, Jianguo Tang, Linjun Huang, Gill Sang Han, Hyun Suk Jung, Jun Chen
Summary: Smart nanofiltration membranes with stimuli-responsive components can change their properties in response to environmental changes, leading to more efficient performance and broader application prospects. This review presents the preparation methods and classification of stimuli-responsive membranes according to their mechanisms. The latest progress and main mechanisms of each stimuli-response type are discussed and summarized. Additionally, future challenges and directions for stimuli-responsive membranes are provided.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Kelvian T. Mularso, Ji-Young Jeong, Gill Sang Han, Hyun Suk Jung
Summary: The development of digital technology has greatly improved our society by introducing the Internet of Things (IoT). Solar cells, especially perovskite photovoltaics (PPVs) with high power conversion efficiencies, are seen as the best option for self-powered IoT integration. This review focuses on discussing recent progress and challenges in the development of high-performance indoor PPVs (Id-PPVs), including optimizing the bandgap and managing defects in the devices.
Review
Chemistry, Multidisciplinary
Meeree Kim, Mahnmin Choi, Sinil Choi, Sohee Jeong
Summary: Developing next-generation colloidal semiconductor nanocrystals with high-quality optoelectronic properties and precise processability relies on achieving complete mastery over the surface characteristics of nanocrystals. Recent progress has been made by combining well-defined surface models with quantitative surface reactions, enabling a better understanding and manipulation of nanocrystal surface chemistry. This research presents a compelling case for utilizing facet-specific chemistry as a platform for mechanistic investigation and morphology exploration, which can pave the way for developing high-quality and precisely designed nanocrystals for optoelectronic technologies.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Arumugam Sivanantham, Hansung Lee, Sung Won Hwang, Han Uk Lee, Sung Beom Cho, Byungmin Ahn, In Sun Cho
Summary: This study investigates the active role of vanadium in improving the electrocatalytic activity for the hydrogen evolution reaction in VxCuCoNiFeMn (x = 0, 0.5, and 1.0) high entropy alloys. The incorporation of vanadium enhances the electrical conductivity and electrochemical surface area of the alloy, leading to improved kinetics for the reaction. The findings can contribute to the development of highly active high entropy alloys for large-scale electrochemical water splitting.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Balasubramanian Jansi Rani, Arumugam Sivanantham, In Sun Cho
Summary: This review summarizes the impact of nanostructured morphologies on the electrochemical performance of spinel manganates. It is found that nanostructured spinel manganates with preferred A-site cation significantly improve the thermodynamics and electrochemical reaction kinetics at solid-liquid and solid-solid interfaces. Particularly, the faceted, hollow, 1D nanostructured CoMn2O4 and its nanocomposites exhibit outstanding electrochemical performance. Feasible methods of synthesizing AMO nanostructures and nanocomposites are also discussed in this review. These insights are expected to contribute to the development of efficient electrode materials for energy conversion and storage devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Mahnmin Choi, Meeree Kim, Yeunhee Lee, Taewan Kim, Jun Hyung Kim, Daekwon Shin, Jeong Won Kim, Yong-Hyun Kim, Sohee Jeong
Summary: The tunable band edge position of nonconductive colloidal quantum dot films is investigated using photo-electron spectroscopy and density functional theory calculations. The results show that the energy levels of nonconducting CQD films can be controlled by partially replacing the surface-bound ligand, providing a method for efficient optoelectronic device design.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Sunghu Kim, Seongmin Park, Meeree Kim, Sohee Jeong
Summary: Single-crystalline indium phosphide (InP) tetrapods were synthesized and proved to be a useful platform for studying multiple exciton behaviors. ZnCl2 precursor was used to enhance the optical performance of InP tetrapods, but no distinct enhancement in photoluminescence was observed. However, further shell growth on InP-ZnCl2 successfully preserved tetrapodal geometry and showed higher photoluminescence than tetrapodal InP/ZnSe. The crystal structure of InP-ZnCl2 was retained even with various Zn feed ratios.
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Hee Jung Kim, Gill Sang Han, Jaesung Kim, Young Ju Kim, Jin Hyuk Choi, Jae Myeong Lee, Geon Woo Yoon, Hongshin Lee, In Sun Cho, Jaesang Lee, Hyun Suk Jung
Summary: In this study, we developed an all-in-one multi-pollutants removal filter based on inverse opal (IO) structures for decentralized water treatment. The filter consists of three adsorbents: Fe2O3, NiOx, and S-doped graphene, for the simultaneous removal of heavy metals, anionic substances, and organic matter. The filter exhibited excellent adsorption performance and ultrafast water flux, making it suitable for practical applications in water treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
He Guo, Geon Woo Yoon, Zi Jia Li, Yeonghun Yun, Sangwook Lee, You-Hyun Seo, Nam Joong Jeon, Gill Sang Han, Hyun Suk Jung
Summary: This study demonstrates a method using light-induced cross-linking to fabricate highly efficient and stable perovskite solar cells. The cross-linked perovskite film shows improved crystal orientation, larger grain size, and protection from water corrosion. Devices fabricated using this method achieve excellent power conversion efficiency and storage stability.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Hee Jung Kim, Oh Yeong Gong, Young Ju Kim, Geon Woo Yoon, Gill Sang Han, Hyunjung Shin, Hyun Suk Jung
Summary: This study proposes an efficient approach to recover and reuse toxic solvents used in the recycling process of perovskite solar cells (PSCs). Through detailed evaluations and a two-step selective dissolution process, the study demonstrates the feasibility of a toxic solvent recycling process for PSC refabrication and the recycling of dissolved hole-conducting materials. The fabricated PSCs exhibited a comparable power conversion efficiency to that of the original PSCs.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Youngho Kim, Noeul Kim, Sang Hoon Lee, Seok-Ki Hyeong, Jae-Hyun Lee, Jaeyeong Lee, Jong Seong Bae, In Sun Cho, Jae-Young Choi, Soo Young Kim, Hak Ki Yu
Summary: The development of technologies for electromagnetic wave contamination has attracted attention. For high frequencies such as those in the K and K-a ranges, there is a limitation in using only one material. To address this, it is necessary to increase the absorption coefficients by increasing the path of electromagnetic waves using internal scattering. This study accurately demonstrated the role of Sn in the growth of indium tin oxide (ITO) nano-branch structure, resulting in high-density ITO nano-branches with the thinnest possible thickness. With shielding efficiencies of 21.09 dB (K band) and 17.81 dB (K-a band), it is expected to be applied in various fields due to its high specific shielding efficiency, low thickness, and weight.
Review
Chemistry, Physical
Ga-Yeong Kim, Kyusun Kim, Hee Jung Kim, Hyun Suk Jung, Il Jeon, Jin-Wook Lee
Summary: Despite the high-efficiency and low production cost, the toxicity of lead-containing metal halide perovskite solar cells (PSCs) poses a major challenge for their practical commercialization and widespread applications. Efforts to develop alternative Pb-free compositions and strategies to immobilize and recycle Pb in Pb-based PSCs have been reviewed. However, complete elimination of Pb from commercially competitive PSCs might require a considerable amount of time and resources, making risk management strategies for available Pb-based PSCs essential for the commercialization of sustainable and environmentally viable PSCs.
Article
Chemistry, Physical
Jumi Park, Eunhye Cho, Kyoungwon Park, Sohee Jeong, Dongho Kim
Summary: This study investigates the influence of electrochemical doping on the optical properties of single-crystalline InP nanotetrapods. The photoluminescence (PL) intensity of these tetrapods undergoes significant changes depending on the nature of charge transfer during electrochemical doping. Electron transfer leads to a decrease in the PL intensity, while injection of additional holes results in a remarkable increase in PL intensity. The injected holes occupy surface hole trap states, enhancing surface passivation and thus improving PL intensity. These findings highlight the potential of InP nanotetrapods as a novel nanostructure for nanocrystal applications.
APPLIED SURFACE SCIENCE
(2023)
