MoO₂-decorated TiO₂ Nanofiber Composite as Visible-light Photocatalysts and Electrodes for Supercapacitor Applications

서수정,암나 투시프,하산 삼시,김현철,길명섭,Seo, Su-Jung,Amna, Touseef,Hassan, M. Shamshi,Kim, Hyun-Chel,Khil, Myung-Seob The Korean Fiber Society 2018 한국섬유공학회지 Vol.55 No.4

Anchoring zero-dimensional nanoparticles on a one-dimensional nanomaterial is potentially advantageous in many applications. In this work, we successfully synthesized $MoO_2$- decorated $TiO_2$ nanofibers using a hydrothermal method with ethanol as a reducing agent. The samples were characterized by XRD, SEM-EDX, EPMA, Raman spectroscopy, and FT-IR. The samples were investigated for visible-light photocatalytic activity using methylene blue as a model dye. The novel $MoO_2$-decorated $TiO_2$ composite showed remarkably enhanced performance compared to pristine $MoO_2$ and $TiO_2$. The $MoO_2$-decorated $TiO_2$ composite also exhibited higher electrochemical capacitance than the pristine samples as electrode materials for supercapacitors. The obtained high photocatalytic activity and supercapacitance can be attributed to the synergistic effects between the $MoO_2$ nanoparticles and $TiO_2$ nanofibers. A maximum specific capacitance of $245.1Fg^{-1}$, measured by cyclic voltammetry at a scan rate of 2 mV/s, was achieved in a $1M\;H_2SO_4$ aqueous solution. The electrochemical performances of pure $MoO_2$ nanoparticles were significantly improved after adding $TiO_2$ nanofibers. These results suggest the applicability of the $MoO_2$-decorated $TiO_2$ hierarchical design for the removal of chemical pollutants and as electrode materials for supercapacitors.

새로 발견한 벽암 각성의 『선원도중결의(禪源圖中決疑)』 간행 배경과 그 내용

서수정(Seo Su jung) 불교학연구회 2018 불교학연구 Vol.55 No.-

조선중기 벽암 각성(碧巖覺性, 1575-1660)이 찬술한 것으로 알려진 􋺷선원도중결의(禪源圖中決疑)􋺸는 그의 비문과 행장 등에 서명이 소개되어 있을 뿐 지금까지 실물이 확인되지는 않았다. 필자는 부산 범어사 성보박물관에 이 책의 목판본이 소장되어 있음을 발견하고 그 원문과 주요 내용을 소개하고자 한다. 이 책은 1648년(인조 26)년 합천 가야산 해인사에서 판각된 것으로, ｢선원도중결의｣와 ｢참상선지설(參詳禪旨說)｣ 그리고 ｢서도중결의후(書圖中決疑後)｣ 3편의 글이 합간(合刊)되어 있다. ｢선원도중결의｣는 규봉 종밀의 저술인 『선원제전집도서』에 나오는 내용중 도식(圖式)에서 드러난 의문점을 벽암 각성이 여러 선객들의 물음에 답하는 13가지의 문답형식으로 풀어낸 글이다. ｢참상선지설｣은 1636년 11월 1일 부휴 선수(浮休善修, 1543-1615)의 기일날 화엄사 벽암당에 모인 여러 사형들이 지눌의 『법집별행록절요병입사기』에 나오는 ‘방하교의(放下敎義) 참상선지(參商禪旨)’의 뜻을 묻자, 벽암 각성이 진각 혜심의 『선문염송』에 나오는 제1 고칙(古則)을 인용하여 그 뜻을 밝힌 글이다. 이 두 글은 벽암 각성의 제자이자 당대 글씨로 유명했던 설봉 희안(雪峯希安)이 행서체로 썼다. 책 말미에 실린 ｢서도중결의후｣는 앞의 두 저술에 대한 발문으로, 선조(宣祖)의 부마이자 당대 문장과 글씨로 명성을 떨쳤던 동회(東淮) 신익성(申翊聖, 1588-1644)이 1642년 경기도 용문산 백운루에서 직접 쓴 글이다. 새로 발견된 벽암 각성의 『선원도중결의(禪源圖中決疑)』는 18세기 강학(講學) 사기(私記)의 효시(嚆矢)로 그 의미가 있으며, 그의 교학과 사상이 새롭게 평가되기를 기대한다. The Seonwon dojung gyeorui 禪源圖中決疑, known to have been written by Byeokam Gakseong (1575-1660) in the mid-Joseon period, has not been discovered in the form of a printed edition. Recently, however, I have found out that a xylographic edition of this book is owned by Seongbo Museum in Beomeosa Temple in Busan. The newly found book is a combined issue of the Seonwon dojung gyeorui 禪源圖 中決疑 and the Chamsang seonji seol 參詳禪旨說, another text authored by Byeokam Gakseong, both of which were published at Haeinsa Temple on Mount Gaya in Hapcheon in 1648. The former text is composed of 13 questions and answers, in which Byeokam Gakseong replies to the questions by itinerant Seon monks on the doubtful points appearing in the diagram on the ten stages of delusion and enlightenment from the Chanyuan zhujuan ji duxu 禪源諸詮集都序 (hereafter Preface). The latter text is based on the discourse delivered by Byeokam Gakseong at Hwaeomsa Temple in 1636. This text comprises an explanation for the gist of Bojo Jinul s Seon on the Discarding [Attachment to] the Meaning of the Doctrine and Examining the Seon Tenets in Detail 放下敎義 參商禪旨 from the Beopjip byeorhaengnok jeoryo byeongip sagi 法集別行錄節要幷入私記(hereafter Excerpts). These two texts were in fact dictated to an attendant whose name was Seolbong Huian, a disciple of Byeokam Gakseong. And the postscript to the book, Seo dojung gyeorui hu 書圖中決疑後, was written in calligraphy by Donghoe Sin Ikseong (1588-1644), a son-in-law of King Seonjo, at Baegunru on Mount Yongmun in Gyeonggi Province in 1642. The newly found Byeokam Gakseong’s Seonwon dojung gyeorui has the significant meaning as the initiative in the personal notes 私記 on the Preface and the Excerpts, both of which were annotated by monks of the late Joseon period in the 18th century. Therefore the further substantial studies are expected to proceed on the teaching and thought of Byeokam Gakseong.

19세기 후반 결사단체의 불서(佛書) 편간(編刊) 배경

서수정 ( Seo Su-jung ) 한국불교사연구소 2017 한국불교사연구 Vol.11 No.-

19세기 후반 결사단체이자 불서의 간행처인 淨願社, 甘露社, 妙蓮社 불서를 중심으로 그 편간 배경을 살펴보면, 경기도 파주 고령산 普光寺의 淨願社에서 편간한 불서는 모두 정토신앙과 관련된 것이었다. 1870년에 『淸珠集』을 간행한 이후 11년이 지난 1881년 3월부터 1882년 4월까지 『佛說大阿彌陀經』, 『西舫彙征』, 『淨土紺珠』, 『願海西帆』을 간행하였다. 그리고 정원사 불서는 幻空 治兆·秋波 瑞璋·虛舟 德眞의 비구 승려들과 ?光居士 劉雲(1821~1884) 등의 거사들이 직접 편찬한 불서들이었다. 이처럼 정원사에서는 정토신앙과 염불수행에 적합한 불서를 직접 기획·편찬했으며, 이를 모아서 『원해서범』이라는 총서로 인행하고자 했다. 여기에 神貞王后를 비롯한 豊壤趙氏 가문 등의 후원을 비롯하여 보광사 승려와 정원사 결사에 참여한 거사들이 시주자로 동참하였다. 甘露社에서는 1882년 2월에 보광거사 유운이 지은 『甘露法會』를 시작으로 3월에 『蓮邦詩選』, 8월에 『圓覺經說誼』를 간행하였다. 이후 1년 뒤인 1883년 7월에 『法海寶筏』, 『金剛經正解』, 『般若心經註解』를 동시에 간행 하였다. 감로사에서는 주로 거사들이 중심이 되어 禪書류의 편간을 기획했던 것으로 생각된다. 그런데 정원사와 감로사 불서가 1870년부터 1881년까지 약 10년 동안은 편간되지 않았다. 이는 정원사와 감로사 불서를 주도했던 보광거사 유운 등의 거사들이 1872년에 법회를 통해 편찬하기 시작하여 1878년에 간행한 妙蓮社의 『濟衆甘露』와 밀접한 관련이 있었다. 무엇보다 묘련사 결사에 참여한 거사들이 道敎의 三聖帝君을 신앙하는 無相檀侍士로 활동했던 점으로 보아, 묘련사의 『제중감로』와 감로사의 불서 간행이 무상단의 善書 간행과 밀접한 관련이 있었던 것으로 추정된다. 이상에서 19세기 후반에 나타난 정원사, 묘련사, 감로사 결사단체의 불서 편간은 이를 주도했던 보광거사 유운이 1884년 봄에 별세함으로써 점차 그 막을 내리게 되었다. This study is to examine the background of compiling and publishing Buddhist texts by the Buddhist societies of Jeongwonsa (淨願社), Gamrosa (甘露社) and Myoryensa (妙蓮社) in the late 19th century. The lay Buddhist Bogwang Yu Un (?光居士 劉雲, 1821~1884) played a key role in the compilation and publication of Buddhist texts at these Buddhist societies. The Jeongwonsa Society, which had been organized together with monks and lay Buddhists in 1869 by Hwangong Chijo (幻空治兆) at Bogwangsa (普光寺) Temple, Yangju (楊州) county around Seoul, compiled and published Buddhist texts for their own needs regarding the Amitabha`s Pure Land faith with support of the royal family and lay Buddhists from 1870 until April 1882. The Gamro-sa Society, which had been organized only with Buddhist laymen in February 1882, began to publish their regulations written by Yu Un including a few texts. In July 1883, the Gamro-sa Society published Buddhist texts which were mostly related to Seon (禪) by contrast with the Amitabha`s Pure Land faith of the Jeongwonsa Society. In 1872 Yu Un participated in a new religious society only with laymen called the Myoryensa Society concentrating the invocation of the Buddha`s name. Over a period of seven years Yu Un and his Myoryensa members published the book Jejung Gamro (濟衆甘露) written by the revelation from God in 1878. The publication of this book had a close relation to the religious participation in Musangdansisa (無相壇侍士) which was the Taoist group with the beliefs of Three holy gods (三聖帝君) i.e. Guanseong (關聖), Munchang (文昌) and Buwoo (孚佑). After his death of the year 1884, the compilation and publication of Buddhist texts by the Buddhist societies of Jeongwonsa, Myoryensa and Gamrosa was brought to an end.

Microwave 가열에 의한 Polyester 직물의 염색에 관한 연구(Ⅰ)

서수정(Soo Jung Seo),임수경(Su Kyung Im),김삼수(Sam Soo Kim) 한국염색가공학회 1998 韓國染色加工學會誌 Vol.10 No.4

저근백피 추출물의 항노화 활성에 관한 연구

서수정 ( Su Jeong Seo ),박가은 ( Ga Eun Park ),장민정 ( Min Jung Jang ),이양숙 ( Yang Suk Lee ) 대한미용학회(구 대한미용과학회) 2018 대한미용학회지 Vol.14 No.2

This study was conducted to investigate the anti-aging effects and cell toxicity of water extracts obtained from Ailanthi radicis cortex at 95℃. The amount of total flavonoid and polyphenol compounds was 4.80 mg/g and 136.89 mg/g, respectively. The astringent effect as a measure of pore tightening activity of the Ailanthi radicis cortex extract was 36.34% at 100 μg/mL. The tyrosinase inhibition as a measure of whitening activity was 53.20% at a concentration of 1,000 μg/mL. The collagenase and elastase inhibitory activities as a measure of anti-wrinkle activity were 48.97% and 18.02% at 1,000 μg/mL, respectively. Cell viability, as determined using the MTT assay, Ailanthi radicis cortex water extract showed no toxicity toward RAW264.7 macrophages and HaCaT keratinocytes. The Ailanthi radicis cortex water extract promoted the synthesis of procollagen type-1 and collagen type-1 at concentration dependent manner. These results suggested that the water extract from the Ailanthi radicis cortex have anti-aging properties and could be used as a natural source for development of functional cosmetics.

농업용 무인 헬기를 이용한 benzobicyclon 혼합제의 잡초방제 효과

박수혁(Su Hyuk Park),원옥재(Ok Jae Won),엄민용(Min Yong Eom),한성민(Sung Min Han),황기선(Ki Seon Hwang),서수정(Su Jung Seo),박기웅(Kee Woong Park) 충남대학교 농업과학연구소 2014 농업과학연구 Vol.41 No.2

This study was conducted to evaluate the efficacy of benzobicyclon mixtures by using Remote-controlled aerial application (RCAA) to control annual and perennial weeds in rice paddy field. Eight annual weed species including Echinochloa crus-galli L. and three perennial weeds were dominated in the experimental field. Application of benzobicyclon mixtures using RCAA was highly effective to control both annual and perennial weed species. When compared with untreated control, no visual injuries were detected at single and double dosage of benzobicyclon mixtures. Finally, rice yield in the benzobicyclon mixtures was as much as that in the hand weeding. This study indicates that benzobicyclon mixtures using RCAA can be applied to control both annual and perennial weed species in rice paddy field.

화장료 소재로서 뜰보리수 과실 추출물의 항산화, 항염증 및 항노화 활성

장민정 ( Min Jung Jang ),서수정 ( Su Jeong Seo ),이양숙 ( Yang Suk Lee ) 대한미용학회(구 대한미용과학회) 2021 대한미용학회지 Vol.17 No.2

Elaeagnus multiflora, commonly called cherry silver berry, is used as a medicinal material in China and Korea. The purpose of this study was to investigate the antioxidant and anti-aging properties of the fruit extract of E. multiflora using different solvents, such as hot water extract (HWE), butylene glycol with water and ethanol extract (BGE), and propylene glycol with water and ethanol extract (PGE). In the measurement of the radical scavenging of 2,2’-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 2,2-diphenyl-1-picryl hydrazyl (DPPH), PGE showed the highest scavenging rates of 84.27% and 95.30%, respectively at a concentration of 2 mg/mL. The SOD-like activity was the highest, 39.98%, in HWE at 2.0 mg/mL, xanthine oxidase inhibition showed 44.98% in HWE. In the analysis of anti-aging effect at 2.0 mg/mL, collagenase and elastase showed the highest inhibition activities, viz. 37.83% and 19.78% in HWE, respectively. In the astringent effect analysis, HWE showed about 90% activity at a concentration of 5.0 mg/mL and about 50% at 25 mg/mL. Tyrosinase inhibition activity for whitening effect was the highest (44.24%) in PGE, followed by HWE, 40.07% at 2.0 mg/mL. Results revealed that PGE had excellent antioxidant activity and HWE showed better anti-inflammatory, anti-aging and astringent effects than BGE and PGE. Therefore, E. multiflora fruits seems to be a natural resource that can be used as a cosmetic material.

Tank/liquor-flow 방식에 의한 폴리에스테르 직물의 감량특성

서말용(Mal Yong Seo),한선주(Sun Ju Han),박상완(Sang Wan Park),서수정(Su Jung Seo),김삼수(Sam Su Kim) 한국염색가공학회 1998 韓國染色加工學會誌 Vol.10 No.2

화장료 소재개발을 위한 5종 약용식물 열수추출 혼합물의 항산화성 연구

이양숙 ( Yang Suk Lee ),장민정 ( Min Jung Jang ),서수정 ( Su Jeong Seo ) 대한미용학회 2021 대한미용학회지 Vol.17 No.3

The present study aimed to examine the antioxidant activity and cytotoxities of cosmetic material development mixture extracts (C. chinensis, P. amurense, H. cordata, S. glabrae and L. bicolor) with different extraction mixing ratios (ME1, 1:1:1:1:1; ME2, 1:1:2:1:1; ME3, 1:1:4:1:2; ME4, 1:1:6:1:2). The results showed that superoxide dismutase (SOD)-like activity was the highest, and 19.24% for the ME4 at 1,000 ㎍/mL. In the measurement of the radical scavenging of ABTS and DPPH, ME3 showed the highest scavenging rates of 97.34% and 99.81%, respectively, at a concentration of 1,000 ㎍/mL. The collagenase and elastase inhibition abilities of ME3 and ME2 mixtures were found to be 47.09% and 17.19% at 1,000 ㎍/mL, and at concentration of 1,000 ㎍/mL, tyrosinase showed the highest inhibition activities 57.3% in ME3. Furthermore, cytotoxicity test of the extract mixture on RAW264.7 macrophages and HaCaT keratinocytes was conducted using the MTT assay. The RAW264.7 macrophages and HaCaT keratinocytes cell toxicity revealed that cell survival did not reduce at 25-100 ㎍/mL concentration. The inhibition of NO production of 5 medicinal herbs mixture decreased by about 13%-15% in the treatment of 100 ㎍ /mL. These results indicated that both ME3 and ME4 have excellent anti-aging and antioxidant activity. Therefore, it can be concluded that ME3 and ME4 with 5 medicinal herbs mixture have the potential to be used as functional ingredient for beauty food and skin health.